It remains challenging to achieve nanoparticles with uniform size and dispersion or single atoms with identical coordination structure, although various methods have been developed to synthesize carbon-supported nanostructured catalysts. Typically, in the synthesis of vinyl chloride (VCM) by acetylene hydrochlorination, a limited …Jun 1, 2023 · Enzymatic catalysis is a complex process that can involve multiple conformations of the enzyme:substrate complex and several competitive reaction pathways, resulting in a multi-dimensional free energy landscape. The study of enzymatic activity often requires deep knowledge of the system to establish the catalytic mechanism and identify the possible reactive conformations of the complex. Here ... Read research published in the ACS Catalysis Vol. 13 Issue 6 on ACS Publications, a trusted source for peer-reviewed journals.CO2 hydrogenation over Fe-based catalysts is a promising pathway to mitigate emissions of this greenhouse gas and provides a possibility for crude-oil-free production of chemicals and fuels. Understanding of (i) the role of crystalline phases or/and surface species in the working catalysts, (ii) the factors affecting their formation under …Published by American Chemical Society. Enzymatic degradation of polyethylene terephthlate (PET) by polyester hydrolases is currently subject to intensive research, as it is considered as a potential eco-friendly recycling method for plastic waste. However, the substrate-binding mode and the molecular mechanism of enzymatic PET hydrolysis are ...Artificial enzymes, usually created by incorporating one or two abiological catalytic species into protein hosts, are becoming promising tools for biocatalysis. However, they are still far behind natural enzymes due to their limited active sites with low activity and selectivity. Here, we proposed a polymeric approach to generate artificial enzymes by …This material is available free of charge on the ACS Publication Web site at The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acscatal.7b04150.. Descriptions of intermediate formation in the two pathways, details of microkinetic modeling calculations, reactants, intermediates, and products …graminicola as a representative member of a large uncharacterized subgroup of AA5_2. Through recombinant production and detailed kinetic analysis, we ...The persistently increasing energy consumption and the low abundance of conventional fuels have raised serious concerns all over the world. Thus, the development of technology for clean-energy production has become the major research priority worldwide. The globalization of advanced energy conversion technologies like rechargeable metal–air …8 Aug 2016 ... Research from PhD candidate Garrett Chado and Professors Mark Stoykovich and Joel Kaar has been highlighted on the August 2016 cover of ACS ...Catalysis – selective catalytic reagents are superior to stoichiometric ones; they can minimize or eliminate waste, depending on the reaction, which is necessary to achieve greener chemistry Maximize Resource Efficiency – catalysis can offer more direct synthetic routes, optimizing the time, energy and materials required to make a desired ... Covalent Attachment of Cobalt Bis (Benzylaminedithiolate) to Reduced Graphene Oxide as a Thin-Film Electrocatalyst for Hydrogen Production with Remarkable Dioxygen Tolerance. Virginia A. Larson. and. Nicolai …The electrochemical urea oxidation reaction (UOR) on Ni has recently attracted much attention as part of the global effort to produce hydrogen from waste. Fe addition to Ni (hydro)oxides results in a significant enhancement of the rate of the oxygen evolution reaction (OER), and a similar role of Fe in the UOR has often been claimed. In …May 18, 2023 · The complexity and dynamics of catalytic systems make it challenging to study the catalysts and catalytic reactions. Fortunately, the advance of machine learning (ML) has made descriptor-based catalyst screening and rational design a mainstream research approach. Herein, the spectroscopic descriptors reported in recent years are highlighted in the field of catalysis. Both vibrational spectra ... Aug 15, 2022 · ACS Catalysis 2024, Article ASAP. Xuhui Zou, Yuxiao Meng, Jianqiao Liu, Yongyong Cao, Lifeng Cui, Zhangfeng Shen, Qineng Xia, Xi Li, Siqian Zhang, Zhigang Ge, Yunxiang Pan, Yangang Wang . Niobium Modification of CeO2 Tuning Electron Density of Nickel–Ceria Interfacial Sites for Enhanced CO2 Methanation. Applied Catalysis B: Environment and Energy warmly welcomes original, innovative, and high-impact contributions within the realm encompassing thermo-, electro-, and photocatalysis to advance clean energy and provide sustainable environmental solutions. We encourage submissions that explore: Fundamental and applied catalysis research, …This protocol provides a straightforward, efficient approach to synthetically important indole-containing cyclic ketones with an α-chiral center and features ...Developing a cost-effective and highly efficient electrocatalyst with superior catalytic activity is crucial for clean and green water splitting, including the hydrogen evolution reaction (HER), the oxygen evolution reaction (OER), and the oxygen reduction reaction (ORR). The single-atom catalyst (SAC) is a breakthrough in industrial catalysis …ConspectusThe hydrogenative conversion of both CO and CO2 into high-value multicarbon (C2+) compounds, such as olefins, aromatic hydrocarbons, ethanol, …A variety of atomically dispersed transition-metal-anchored nitrogen-doped carbon (M–N–C) electrocatalysts have shown encouraging electrochemical CO2 reduction reaction (CO2RR) performance, with the underlying fundamentals of central transition-metal atom determined CO2RR activity and selectivity yet remaining unclear. Herein, a …Hydrogen is important because it is involved in the process of enzyme catalysis and because it stabilizes things like nucleic acids and proteins. Hydrogen bonds with many different...Annually, we at ACS Catalysis, in partnership with the ACS Division of Catalysis Science and Technology (CATL), have the pleasure of recognizing outstanding recent contributions to catalysis by an individual or a team with the ACS Catalysis Lectureship for the Advancement of Catalytic Science award. We strive to recognize significant and ... Apr 19, 2023 · Herein, we have highlighted the role of DCC-driven stable porous cages as catalysts where catalysis occurs via the activation of the encapsulated substrates. As a result, in many cases these hosts result in better yields and stereoselectivity compared to conventional reactions without cages. This perspective presents the use of dynamic covalent ... The enantioselective reduction of enamides is an efficient and atom-economical way to construct chiral amine motifs. In contrast to transition-metal complex based asymmetric hydrogenation, an alternative biocatalytic way is more sustainable but remains unexploited. The challenge lies in the redox potential mismatch between the …DC current is direct current, which means electricity only flows in one direction; AC current is alternating current, which means it flows in both directions. Batteries run on DC c...Nature has provided a fantastic array of enzymes that are responsible for essential biochemical functions but not usually suitable for technological applications. Not content with the natural repertoire, protein engineering holds promise to extend the applications of improved enzymes with tailored properties. However, engineering of robust proteins …Climate change has prompted scientists to search for possible ways of reducing CO2 emissions or even capturing it from the atmosphere. Catalytic reduction of CO2 into value-added chemicals has been put forward as a viable strategy. While thermocatalytic routes of producing CO, methanol, methane, and higher hydrocarbons …Light olefin selectivity reaches as high as 81.6% with CO conversion 35.5% at Si/Al ratio = 0.011. A higher Si/Al ratio gives a stronger acid strength and higher acid density, which leads to a reduced ratio of olefins/paraffins (O/P) and an increased C 3 /C 2 ratio in the products. This could be attributed to the enhanced secondary reactions of ...Fischer–Tropsch synthesis (FTS) is a significant catalytic process for the production of liquid fuel and fine chemicals from natural gas-, coal-, and biomass-derived syngas. However, exploring high-performance catalysts and understanding the catalytic mechanism remain challenging. Herein, we design a Ru1Con single-atom alloy (SAA) …Call for Papers: Sustainable Catalysis. Martin Sugden. Jan 12, 2024. 2 min read. Read the latest stories around cutting-edge chemistry published in ACS …Dec 4, 2020 · Biomolecular self-assembly, typically with de novo designed peptide or DNA as the building blocks, provides an effective avenue to orient and confine reactive groups into a catalytically active configuration to mimic and even rival the catalytic performance of native enzymes. In this Review, we discuss the chemical and structural properties of ... Mar 15, 2022 · Ammonia is an important chemical for synthesized fertilizers traditionally and for a potential energy vector increasingly. Industrial ammonia synthesis through the Haber–Bosch process is energy-intensive and requires advanced materials to catalyze ammonia synthesis under mild conditions, whereas the utilization of ammonia as a hydrogen carrier via ammonia decomposition is facing a similar ... Are you looking to become a certified professional coder (CPC)? If so, you’ll need to pass the CPC practice exam. Taking the practice exam is a great way to prepare for the real th...Mar 1, 2022 · Dual-metal-site catalysts (DMSCs) have emerged as a frontier in heterogeneous catalysis, while the underlying relationships connecting their dual-site synergistic effects on catalytic performance remain unclear. Here we present a comprehensive first-principles study of O2 activation and CO oxidation on a series of N-coordinated DMSCs. We discovered that the N3-coordinated-adjacent dual-metal ... 8 Aug 2016 ... Research from PhD candidate Garrett Chado and Professors Mark Stoykovich and Joel Kaar has been highlighted on the August 2016 cover of ACS ...ACS Catalysis (2017), 7 (2), 1227-1243 CODEN: ACCACS; ISSN: 2155-5435. (American Chemical Society) This review covers the advance in the development of Fe, Co, and Ni catalysts for the alkene hydrosilylation reaction, as well as the related dehydrogenative silylation reaction. The hydrosilylation of alkene is an important reaction …The direct introduction of sp3 carbon fragments at the β position of α,β-unsaturated aldehydes is greatly complicated by competing 1,2-addition manifolds. Previous catalytic enantioselective conjugate addition methods, based on the use of organometallic reagents or ground-state iminium ion activation, could not provide general and efficient solutions. …Included among the many challenges regarding renewable energy technology are improved electrocatalysts for the oxygen evolution reaction (OER). In this study, we report a novel bifunctional electrocatalyst based on a highly dense CoOx catalyst by introducing CeOx. The CoOx catalyst is fabricated by two-step electrodeposition, …15 Jun 2021 ... Raffaella becomes an Associate Editor in ACS Catalysis! ... Raffaella joins the editorial team of ACS Catalysis. Raffaella will handle manuscripts ...Jul 10, 2022 · Herein, we report a photoexcited base-metal-catalyzed selective desaturation of aliphatic amides and imides. The reaction is catalyzed by a base-metal cobalt complex under visible-light irradiation. This transformation can be efficiently processed at room temperature and enables the synthesis of valuable cyclic and acyclic enamides and enimides from abundant chemicals. Density functional ... Ketones are among the most useful functional groups in organic synthesis. Here, we report a carbonylative cross-electrophile coupling reaction that utilizes carbon monoxide gas as both carbonyl source and reductant. The use of Pd/Rh cooperative catalysis enables the carbonylative coupling of easily accessible aryl triflates and aryl …Metal hydrides (MHs) are featured for their reversible hydrogen absorption and desorption properties, which are conventionally used as hydrogen storage materials. …The most promising approach to mitigating the greenhouse effect and tackling the energy crisis is to convert carbon dioxide into valuable liquid fuels through artificial photosynthesis. Nevertheless, most photocatalysts have poor product selectivity, low catalytic performance, and poor cycling stability. Herein, we synthesized novel UiO …We report the selective hydroxylation of small alkanes with H2O2 catalyzed by an artificial P450 peroxygenase system generated from engineered cytochrome P450BM3 variants in assistance with dual-functional small molecule (DFSM), in which DFSM acts as a general acid–base co-catalyst for activating H2O2. This peroxygenase …The electrochemical urea oxidation reaction (UOR) on Ni has recently attracted much attention as part of the global effort to produce hydrogen from waste. Fe addition to Ni (hydro)oxides results in a significant enhancement of the rate of the oxygen evolution reaction (OER), and a similar role of Fe in the UOR has often been claimed. In …Going beyond conventional configurations, a revolutionizing design is presented for double-atom catalysts with metal dimers vertically anchored in defective graphene forming an inverse sandwich structure. Density functional theory and machine learning are applied to unlock their potential for electrocatalyzing CO2 reduction, aiming to mitigate atmospheric CO2 levels and produce value-added ... When it comes to cooling your home, there are several options available in the market. Two of the most popular types of air conditioners are portable ACs and window ACs. In this ar...Nature Catalysis - Multiple ... van der Hoeven, J. E. S. et al. Entropic control of HD exchange rates over dilute Pd-in-Au alloy nanoparticle catalysts. ACS Catal. 11, …Developing a cost-effective and highly efficient electrocatalyst with superior catalytic activity is crucial for clean and green water splitting, including the hydrogen evolution reaction (HER), the oxygen evolution reaction (OER), and the oxygen reduction reaction (ORR). The single-atom catalyst (SAC) is a breakthrough in industrial catalysis …Are you preparing for the RSCIT exam? Want to boost your chances of success on the online test? Look no further. In this article, we will provide you with some valuable tips and tr...Are you getting ready to take your DMV written test? If so, you’re probably feeling a little overwhelmed. After all, the written test is an important part of getting your driver’s ...The enantioselective reduction of enamides is an efficient and atom-economical way to construct chiral amine motifs. In contrast to transition-metal complex based asymmetric hydrogenation, an alternative biocatalytic way is more sustainable but remains unexploited. The challenge lies in the redox potential mismatch between the …The enantioselective reduction of enamides is an efficient and atom-economical way to construct chiral amine motifs. In contrast to transition-metal complex based asymmetric hydrogenation, an alternative biocatalytic way is more sustainable but remains unexploited. The challenge lies in the redox potential mismatch between the …Copper-Catalyzed Synthesis of Masked (Hetero)Aryl Sulfinates. Stereoselective Synthesis of Either. 1155 Sixteenth Street N.W. About ACS Publications. ACS & Open Access. ACS Publications Blog. Journals A-Z. ACS Publishing Center. 2024-02-15T07:54:50.884-08:00.Mar 11, 2022 · Multicomponent alloys are promising candidates as catalysts for hydrogen evolution reaction (HER) in aqueous solutions owing to the synergic effects between elements. However, due to the vast compositional space they occupy, identifying the optimum catalyst is challenging both computationally and experimentally. In this paper, we propose a scalable high-throughput bubble screening method that ... Single-atom catalysts (SACs) provide an ideal platform for reducing noble-metal usage. SACs also exhibit unusual catalytic properties due to the absence of a metal surface. The role of the support may have a significant effect on the catalytic properties, similar to that of the ligand molecules in homogeneous catalysts. Here, the support effect was …Sep 4, 2020 · This graphic illustrates the importance of photocatalysis to tackle clean energy and environmental problems for establishing a balance that sustains life on earth. Perovskite oxide-based photocatalysts have shown promising potential and their horizon is not far off. View the article. The synthesis of steroid drugs by multistage modifications of the steroidal core is challenging since site-specific and selective modification is essentially required, which is often difficult or complicated for chemocatalysis. For example, the synthesis of Trenbolone (3), a versatile anabolic–androgenic steroid, relies on a four-step chemical …Cathleen Crudden’s research group focuses on catalysis, chirality and materials chemistry. In particular, they are interested in developing new reactions to prepare compounds of interest to the pharmaceutical industry, specifically reactions that are enantioselective or enantiospecific. We report the selective hydroxylation of small alkanes with H2O2 catalyzed by an artificial P450 peroxygenase system generated from engineered cytochrome P450BM3 variants in assistance with dual-functional small molecule (DFSM), in which DFSM acts as a general acid–base co-catalyst for activating H2O2. This peroxygenase …Don't fear your next interview—conquer it. This post originally appeared at LinkedIn. Follow the author here. Most people’s biggest job-hunting fear is being put on the spot by odd...Professor Kazunari Domen has devoted his research career in catalysis to development of water splitting photocatalysts, mechanocatalytic water splitting, transition metal oxide mesoporous materials, transmission infrared spectroscopy, infrared reflection absorption spectroscopy (IRAS), time-resolved infrared laser spectroscopy, surface …Production of formate or CO from electrochemical CO2 reduction reactions (eCO2RRs) represents a promising way to utilize CO2 with future low-carbon electricity to produce value-added chemicals and fuels. Herein, a series of Cu–Sn composite catalysts were designed for eCO2RRs. The reduction products could be tuned selectively from …Catalysis – selective catalytic reagents are superior to stoichiometric ones; they can minimize or eliminate waste, depending on the reaction, which is necessary to achieve greener chemistry Maximize Resource Efficiency – catalysis can offer more direct synthetic routes, optimizing the time, energy and materials required to make a desired ...ACS Catalysis (2015), 5 (2), 1283-1302 CODEN: ACCACS; ISSN: 2155-5435. (American Chemical Society) A review. The chem. of nickel N-heterocyclic carbene complexes is a research area that has blossomed over the last 10 years, and a large no. of new complexes with a variety of architectural motifs are now known.ACS Catalysis is dedicated to publishing original research on heterogeneous catalysis, homogeneous catalysis, and bio-catalysis. Application coverage includes life sciences, drug discovery ... The recent explosive growth in research on catalysis by supported single metal atoms proves the scientific interest in this new frontier of heterogeneous catalysis. A supported single-atom catalyst (SAC) contains only isolated individual atoms dispersed on, and/or coordinated with, the surface atoms of an appropriate support. SACs not only …ConspectusThe hydrogenative conversion of both CO and CO2 into high-value multicarbon (C2+) compounds, such as olefins, aromatic hydrocarbons, ethanol, …Biomolecular self-assembly, typically with de novo designed peptide or DNA as the building blocks, provides an effective avenue to orient and confine reactive groups into a catalytically active configuration to mimic and even rival the catalytic performance of native enzymes. In this Review, we discuss the chemical and structural properties of ...Included among the many challenges regarding renewable energy technology are improved electrocatalysts for the oxygen evolution reaction (OER). In this study, we report a novel bifunctional electrocatalyst based on a highly dense CoOx catalyst by introducing CeOx. The CoOx catalyst is fabricated by two-step electrodeposition, …In this work, Fe–Zn catalysts were prepared, characterized, and examined for the synthesis of linear high carbon α-olefins (LAOs; C ≥ 4) directly from CO2 hydrogenation. The relationship of performance and structure has been established to unravel the role of ZnO in bimetallic Fe5C2–ZnO catalysts. A Fe2Zn1 catalyst showed high selectivity to …Understanding how multicopper oxidases (MCOs) reduce oxygen in the trinuclear copper cluster (TNC) is of great importance for development of catalysts for the oxygen reduction reaction (ORR). Herein, we report a mechanistic investigation into the ORR activity of the dinuclear copper complex [Cu2L(μ-OH)]3+ (L = 2,7-bis[bis(2-pyridylmethyl)aminomethyl] …Aug 5, 2022 · Metal–organic frameworks (MOFs) and coordination polymers (CPs) are potential candidates for high-performance photocatalysts because of their high tunability of electronic and structural properties. For example, MOFs and CPs having a high specific surface area (∼1000 m2 g–1) have been applied as visible-light-driven photocatalysts for CO2 reduction and water splitting. Herein, we show a ... Oct 19, 2020 · The electrocatalytic reduction of carbon dioxide (CO2) by means of renewable energies is widely recognized as a promising approach to establish a sustainable closed carbon cycle economy. However, widespread application is hampered by the inherent difficulty in suppressing the hydrogen evolution reaction and controlling the overall process selectivity. Further critical parameters are the ... Cathleen Crudden’s research group focuses on catalysis, chirality and materials chemistry. In particular, they are interested in developing new reactions to prepare compounds of interest to the pharmaceutical industry, specifically reactions that are enantioselective or enantiospecific. The Investigation of a Switchable Iridium Catalyst for the Hydrogenation of Amides: A Case Study of C–O Versus C–N Bond Scission. Anne K. Ravn. and. Nomaan M. Rezayee *. ACS Catalysis 2022, 12, 19, 11927-11933 (Letter) Publication Date (Web): September 16, 2022. Abstract.Herein we report the iron-catalyzed β-C(sp3)-methylation of primary alcohols using methanol as a C1 building block. This borrowing hydrogen approach employs a well-defined bench-stable (cyclopentadienone)iron(0) carbonyl complex as precatalyst (5 mol %) and enables a diverse selection of substituted 2-arylethanols to undergo β-C(sp3) …Catalysis – selective catalytic reagents are superior to stoichiometric ones; they can minimize or eliminate waste, depending on the reaction, which is necessary to achieve greener chemistry Maximize Resource Efficiency – catalysis can offer more direct synthetic routes, optimizing the time, energy and materials required to make a desired ...This article describes the discovery and development of a palladium-catalyzed asymmetric C–H olefination of 2-hydroxybiaryls. The strategy allows a direct assembly of optically active, axially chiral 2-substituted-2′-hydroxybiaryls from readily available precursors and demonstrates that the native hydroxy unit of the substrates can work as an efficient …Herein, we report on a molecular catalyst embedding metal–organic framework (MOF) that enables enhanced photocatalytic CO2 reduction activity. A benchmark photocatalyst fac-ReBr(CO)3(4,4′-dcbpy) (dcbpy = dicarboxy-2,2′-bipyridine) and photosensitizer Ru(bpy)2(5,5′-dcbpy)Cl2 (bpy = 2,2′-bipyridine) were synergistically entrapped inside the cages of the nontoxic and inexpensive MIL-101 ... Multicomponent (or multisite) catalysts are gaining increasing importance and popularity in heterogeneous catalysis and yet the cooperation mechanism among them remains obscure and intriguing. In this work, a vital and characteristic phenomenon in the two-component catalytic systems, the diffusion of surface intermediates, and the induced …Atomically dispersed metal atoms on supports, so-called single-atom catalysts (SACs), have recently attracted extensive attention in the catalysis field. It has been found that besides the primary metal atom, the proximial atoms also contribute to the catalytic activity significantly. Here, we show that tailoring of the local coordination environment of …The recent explosive growth in research on catalysis by supported single metal atoms proves the scientific interest in this new frontier of heterogeneous catalysis. A supported single-atom catalyst (SAC) contains only isolated individual atoms dispersed on, and/or coordinated with, the surface atoms of an appropriate support. SACs not only …. May 18, 2023 · The complexity and dynamics of caCatalysis – selective catalytic reagents ar Seawater electrolysis is an attractive approach for producing clean hydrogen fuel in scenarios where freshwater is scarce and renewable electricity is abundant. However, chloride ions (Cl–) in seawater can accelerate electrode corrosion and participate in the undesirable chlorine evolution reaction (CER). This problem is especially acute in acidic … Read research published in the ACS Catalysis Vol. 13 Issue 6 on A general iron-catalyzed methylation has been developed using methanol as a C1 building block. This borrowing hydrogen approach employs a Knölker-type (cyclopentadienone)iron carbonyl complex as catalyst (2 mol %) and exhibits a broad reaction scope. A variety of ketones, indoles, oxindoles, amines, and sulfonamides undergo mono- or dimethylation …The recent explosive growth in research on catalysis by supported single metal atoms proves the scientific interest in this new frontier of heterogeneous catalysis. A supported single-atom catalyst (SAC) contains only isolated individual atoms dispersed on, and/or coordinated with, the surface atoms of an appropriate support. SACs not only … Don't fear your next interview—conquer it. This post originally ap...
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