EES catalysis最新文献

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Non-thermal plasma catalysis driven sustainable pyrolysis oil upgrading to jet fuel under near-ambient conditions† 近环境条件下非热等离子体催化驱动可持续热解油升级为喷气燃料
EES catalysis Pub Date : 2024-01-02 DOI: 10.1039/D3EY00309D
Hoang M. Nguyen, Ali Omidkar, Wenping Li, Zhaofei Li and Hua Song
{"title":"Non-thermal plasma catalysis driven sustainable pyrolysis oil upgrading to jet fuel under near-ambient conditions†","authors":"Hoang M. Nguyen, Ali Omidkar, Wenping Li, Zhaofei Li and Hua Song","doi":"10.1039/D3EY00309D","DOIUrl":"10.1039/D3EY00309D","url":null,"abstract":"<p >The global aviation industry is under increasing pressure to mitigate its environmental impact and achieve net-zero objectives. Reducing CO<small><sub>2</sub></small> emissions alone is insufficient, as it overlooks crucial parts of the overall climate impacts. Addressing climate-neutral aviation fuel production from sustainable feedstock and effective technology is crucial. Here, we present a breakthrough in sustainable upgrading of pyrolysis oil with CH<small><sub>4</sub></small> to jet fuel using non-thermal plasma triphase catalysis, characterized by an opposite gas–liquid flow and a fluidized catalyst under near-ambient conditions of atmospheric pressure and around 100 °C, resulting in an impressive liquid oil yield of almost 87%. This work delves into the strategic distribution of iridium (Ir) as minute nanoclusters on GaN, which serves to ensure robust catalytic stability and instigate synergistic interactions between plasma and catalysis. This unique configuration establishes an active surface conducive to the transformation of pyrolysis oil into essential jet fuel constituents, encompassing gasoline hydrocarbons (C<small><sub>5</sub></small>–C<small><sub>11</sub></small>), aromatics, and cycloalkanes. Both empirical experiments and computational analysis converge to confirm that methane activation can effectively occur within the plasma zone while surface reactions of cleavage of C–H, C–O, and C–N bonds with adsorbed H and CH<small><sub><em>x</em></sub></small> active species occurring on the Ir(100) surface play a crucial role in enhancing selectivity, resulting in upgraded oil meeting jet fuel commercial specifications. This novel approach holds substantial promise in the pursuit of sustainable and eco-friendly jet fuel production.</p>","PeriodicalId":72877,"journal":{"name":"EES catalysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ey/d3ey00309d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139077843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Crystal facet engineering of spinel NiCo2O4 with enhanced activity and water resistance for tuneable catalytic methane oxidation† 具有更高活性和耐水性的尖晶石镍钴氧化物晶面工程用于可调式催化甲烷氧化
EES catalysis Pub Date : 2023-12-26 DOI: 10.1039/D3EY00281K
Yash Boyjoo, Yonggang Jin, Xin Mao, Guangyu Zhao, Thomas Gengenbach, Aijun Du, Hua Guo and Jian Liu
{"title":"Crystal facet engineering of spinel NiCo2O4 with enhanced activity and water resistance for tuneable catalytic methane oxidation†","authors":"Yash Boyjoo, Yonggang Jin, Xin Mao, Guangyu Zhao, Thomas Gengenbach, Aijun Du, Hua Guo and Jian Liu","doi":"10.1039/D3EY00281K","DOIUrl":"10.1039/D3EY00281K","url":null,"abstract":"<p >Spinel NiCo<small><sub>2</sub></small>O<small><sub>4</sub></small> are excellent catalysts for complete methane oxidation. Nevertheless, the spinel structure is thermally unstable and its activity is negatively affected by humidity. Herein, we report crystal facet engineering synthesis of spinel NiCo<small><sub>2</sub></small>O<small><sub>4</sub></small> hexagonal nanosheets with different exposed facets. Density functional theory (DFT) simulations predict that a more viable reaction mechanism for methane oxidation occurs on 112-NiCo<small><sub>2</sub></small>O<small><sub>4</sub></small> with {112} exposed facets compared with 111-NiCo<small><sub>2</sub></small>O<small><sub>4</sub></small> with {111} exposed facets. Detailed material characterization and catalytic oxidation testing verified the DFT results showing that 112-NiCo<small><sub>2</sub></small>O<small><sub>4</sub></small> has better thermal stability as well as higher catalytic activity towards methane oxidation than 111-NiCo<small><sub>2</sub></small>O<small><sub>4</sub></small>. Conversely, 111-NiCo<small><sub>2</sub></small>O<small><sub>4</sub></small> has the enhanced water resistance of the two catalysts. DFT calculations suggest that OH groups tend to preferentially adsorb onto metal sites, which (1) reduces the number of active sites available and (2) makes CH<small><sub>4</sub></small> adsorption and activation a more arduous process. This study offers insights on the behavior of spinel oxide catalysts towards methane combustion in dry and humid conditions, further demonstrating that crystal facet engineering can be a practical strategy to tune the activity and water resistance of metal-oxide catalysts.</p>","PeriodicalId":72877,"journal":{"name":"EES catalysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ey/d3ey00281k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139052826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrochemical trends of a hybrid platinum and metal–nitrogen–carbon catalyst library for the oxygen reduction reaction† 用于氧还原反应的铂和金属-氮-碳混合催化剂库的电化学发展趋势
EES catalysis Pub Date : 2023-12-21 DOI: 10.1039/D3EY00235G
Alvin Ly, Eamonn Murphy, Hanson Wang, Ying Huang, Giovanni Ferro, Shengyuan Guo, Tristan Asset, Yuanchao Liu, Iryna V. Zenyuk and Plamen Atanassov
{"title":"Electrochemical trends of a hybrid platinum and metal–nitrogen–carbon catalyst library for the oxygen reduction reaction†","authors":"Alvin Ly, Eamonn Murphy, Hanson Wang, Ying Huang, Giovanni Ferro, Shengyuan Guo, Tristan Asset, Yuanchao Liu, Iryna V. Zenyuk and Plamen Atanassov","doi":"10.1039/D3EY00235G","DOIUrl":"10.1039/D3EY00235G","url":null,"abstract":"<p >Enhancing the activity and durability of Pt nanoparticles for the oxygen reduction reaction (ORR) is of critical importance in achieving an optimal, cost-efficient proton exchange membrane fuel cell (PEMFC) catalyst. Aimed at improving the intrinsic catalytic activity and durability of the Pt nanoparticles, this work utilizes a library of fourteen 3d, 4d, 5d, and <em>f</em> metal atomically dispersed metal–nitrogen–carbon (M–N–C) catalysts as active supports, synthesizing a corresponding library of Pt/M–N–C catalysts. XPS and XANES measurements indicate a reduced oxidation state of the Pt nanoparticles due to interactions with the M–N–C support. Further alteration of the electronic structure of the Pt nanoparticles arising from interactions with the M–N<small><sub><em>x</em></sub></small> sites is evidenced through the CO oxidation peak, which experiences broadening, shoulder formation and peak shifting over varying M–N–C supports. ORR performance reveals the significantly enhanced intrinsic catalytic activity of the Pt nanoparticles on M–N–Cs over a Pt/C standard, through specific activity calculations. This work demonstrates the application of highly active hybrid Pt/M–N–C catalysts, showcasing the variation in activity as one traverses the periodic table, while highlighting important design criteria to achieve highly active and durable ORR catalysts.</p>","PeriodicalId":72877,"journal":{"name":"EES catalysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ey/d3ey00235g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138823828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-pressure electrochemistry: a new frontier in decarbonization† 高压电化学:脱碳的新前沿
EES catalysis Pub Date : 2023-11-28 DOI: 10.1039/D3EY00284E
Nishithan C. Kani, Samuel Olusegun, Rohit Chauhan, Joseph A. Gauthier and Meenesh R. Singh
{"title":"High-pressure electrochemistry: a new frontier in decarbonization†","authors":"Nishithan C. Kani, Samuel Olusegun, Rohit Chauhan, Joseph A. Gauthier and Meenesh R. Singh","doi":"10.1039/D3EY00284E","DOIUrl":"10.1039/D3EY00284E","url":null,"abstract":"<p >The chemical manufacturing of commodity chemicals, responsible for approximately 24% of global carbon emissions, poses a critical environmental challenge. With escalating demand due to economic development, urgent decarbonization strategies are imperative. Traditional electrochemical synthesis encounters hindrances, especially mass transfer limitations at relevant current densities, primarily attributed to gas phase reactants and products. In this Perspective, we explore the viability of high-pressure electrochemistry as a transformative solution. Our analysis reveals that applying pressure can overcome mass transfer limitations, enhance selectivity, and improve overall activity, all while minimizing energy consumption and capital expenditure for distributed production processes. We shed light on the influence of pressure on Pourbaix diagrams, electric double layer, electrolyte activity, conductivity, electrostriction-enhanced selectivities, catalyst activity, and stability. Additionally, insights are provided into the design and operation of existing reactors and tools for high-pressure electrochemistry, along with the imperative for future fundamental studies. In the context of decentralized production, we argue that the marginal differential capital costs associated with high-pressure reactors become inconsequential. Ultimately, our work seeks to pave the way for the decarbonization of the chemical industry by establishing innovative pathways for the electrochemical synthesis of commodity chemicals, presenting high-pressure electrochemical synthesis as a potential paradigm shift in this transformative journey.</p>","PeriodicalId":72877,"journal":{"name":"EES catalysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ey/d3ey00284e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138515495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unconventional intermetallic noble metal nanocrystals for energy-conversion electrocatalysis 用于能量转换电催化的非常规金属间贵金属纳米晶体
EES catalysis Pub Date : 2023-11-28 DOI: 10.1039/D3EY00248A
Zhuhuang Qin, Tanyuan Wang, Zhangyi Yao and Qing Li
{"title":"Unconventional intermetallic noble metal nanocrystals for energy-conversion electrocatalysis","authors":"Zhuhuang Qin, Tanyuan Wang, Zhangyi Yao and Qing Li","doi":"10.1039/D3EY00248A","DOIUrl":"10.1039/D3EY00248A","url":null,"abstract":"<p >Structurally ordered intermetallic noble metal nanocrystals (NCs) with unconventional phases exhibit impressive catalytic activity and stability resulting from the novel atomic stacking patterns and coordination environments, and thus have attracted extensive attention for energy-conversion electrocatalysis in recent years. In this mini-review, recent advances in developing unconventional intermetallic noble metal NCs for high-performance electrochemical energy conversion technologies are highlighted. First, the theoretical aspects of the relationship between the crystal phases of metal alloys and their electrocatalytic performance are introduced, and the obstacles in the preparation of unconventional intermetallic noble metal NCs are described. Then, several representative examples are presented to highlight the applications of unconventional noble metal-based intermetallic NCs as electrocatalysts for different electrocatalytic reactions. Finally, perspectives and future opportunities for the rational design and preparation of unconventional intermetallic NCs for sustainable electrochemical devices are discussed.</p>","PeriodicalId":72877,"journal":{"name":"EES catalysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ey/d3ey00248a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138515510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrochemically decoupled reduction of CO2 to formate over a dispersed heterogeneous bismuth catalyst enabled via redox mediators† 在分散的非均相铋催化剂上,通过氧化还原介质实现CO2的电化学去耦还原成甲酸
EES catalysis Pub Date : 2023-11-28 DOI: 10.1039/D3EY00271C
Mark Potter, Daniel E. Smith, Craig G. Armstrong and Kathryn E. Toghill
{"title":"Electrochemically decoupled reduction of CO2 to formate over a dispersed heterogeneous bismuth catalyst enabled via redox mediators†","authors":"Mark Potter, Daniel E. Smith, Craig G. Armstrong and Kathryn E. Toghill","doi":"10.1039/D3EY00271C","DOIUrl":"10.1039/D3EY00271C","url":null,"abstract":"<p >Electrochemical CO<small><sub>2</sub></small> reduction is a topic of major interest in contemporary research as an approach to use renewably-derived electricity to synthesise useful hydrocarbons from waste CO<small><sub>2</sub></small>. Various strategies have been developed to optimise this challenging reaction at electrode interfaces, but to-date, decoupled electrolysis has not been demonstrated for the reduction of CO<small><sub>2</sub></small>. Decoupled electrolysis aims to use electrochemically-derived charged redox mediators – electrical charge and potential vectors – to separate catalytic product formation from the electrode surface. Utilising an electrochemically generated highly reducing redox mediator; chromium propanediamine tetraacetate, we report the first successful application of decoupled electrolysis to electrochemical CO<small><sub>2</sub></small> reduction. A study of metals and metal composites found formate to be the most accessible product, with bismuth metal giving the highest selectivity. Copper, tin, gold, nickel and molybdenum carbide heterogeneous catalysts were also investigated, in which cases H<small><sub>2</sub></small> was found to be the major product, with minor yields of two-electron CO<small><sub>2</sub></small> reduction products. Subsequent optimisation of the bismuth catalyst achieved a high formate selectivity of 85%. This method represents a radical new approach to CO<small><sub>2</sub></small> electrolysis, which may be coupled directly with renewable energy storage technology and green electricity.</p>","PeriodicalId":72877,"journal":{"name":"EES catalysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ey/d3ey00271c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138515494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Predicting the rates of photocatalytic hydrogen evolution over cocatalyst-deposited TiO2 using machine learning with active photon flux as a unifying feature† 以主动光子通量为统一特征的机器学习预测共催化剂沉积TiO2的光催化析氢速率
EES catalysis Pub Date : 2023-11-28 DOI: 10.1039/D3EY00246B
Yousof Haghshenas, Wei Ping Wong, Denny Gunawan, Alireza Khataee, Ramazan Keyikoğlu, Amir Razmjou, Priyank Vijaya Kumar, Cui Ying Toe, Hassan Masood, Rose Amal, Vidhyasaharan Sethu and Wey Yang Teoh
{"title":"Predicting the rates of photocatalytic hydrogen evolution over cocatalyst-deposited TiO2 using machine learning with active photon flux as a unifying feature†","authors":"Yousof Haghshenas, Wei Ping Wong, Denny Gunawan, Alireza Khataee, Ramazan Keyikoğlu, Amir Razmjou, Priyank Vijaya Kumar, Cui Ying Toe, Hassan Masood, Rose Amal, Vidhyasaharan Sethu and Wey Yang Teoh","doi":"10.1039/D3EY00246B","DOIUrl":"10.1039/D3EY00246B","url":null,"abstract":"<p >An accurate model for predicting TiO<small><sub>2</sub></small> photocatalytic hydrogen evolution reaction (HER) rates is hereby presented. The model was constructed from a database of 971 entries extracted predominantly from the open literature. A key step that enabled high accuracy lies in the use of active photon flux (AcP, photons with energy equal to and greater than the bandgap energy of the photocatalyst) as the input feature describing the irradiation. The quantification of AcP, besides being a more direct feature describing the photocatalyst excitation, circumvents the use of lamp power ratings and light intensities as ambiguous inputs as they encompass varying degrees of AcP depending on the irradiation spectra. The AcP unifies four other key performing features (out of 46 initially screened), <em>i.e.</em>, cocatalyst work functions, loadings of cocatalyst, alcohol type and concentrations, to afford a physically-intuitive model that can be generalized to a wide range of experimental conditions. The inclusion of AcP as an input to the machine learning model for HER prediction leads to a mean absolute error of 7 μmol h, which is a 90% reduction when compared to a model that does not use AcP. Verification of untested conditions with high HER rates, identified through Bayesian optimization, saw less than 9% deviation from the physically-measured kinetics, thus confirming the validity of the model.</p>","PeriodicalId":72877,"journal":{"name":"EES catalysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ey/d3ey00246b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138515498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Iron oxide-promoted photochemical oxygen reduction to hydrogen peroxide (H2O2)† 氧化铁促进光化学氧还原成过氧化氢(H2O2)
EES catalysis Pub Date : 2023-11-24 DOI: 10.1039/D3EY00256J
Thomas Freese, Jelmer T. Meijer, Maria B. Brands, Georgios Alachouzos, Marc C. A. Stuart, Rafael Tarozo, Dominic Gerlach, Joost Smits, Petra Rudolf, Joost N. H. Reek and Ben L. Feringa
{"title":"Iron oxide-promoted photochemical oxygen reduction to hydrogen peroxide (H2O2)†","authors":"Thomas Freese, Jelmer T. Meijer, Maria B. Brands, Georgios Alachouzos, Marc C. A. Stuart, Rafael Tarozo, Dominic Gerlach, Joost Smits, Petra Rudolf, Joost N. H. Reek and Ben L. Feringa","doi":"10.1039/D3EY00256J","DOIUrl":"10.1039/D3EY00256J","url":null,"abstract":"<p >Hydrogen peroxide (H<small><sub>2</sub></small>O<small><sub>2</sub></small>) is a valuable green oxidant with a wide range of applications. Furthermore, it is recognized as a possible future energy carrier achieving safe operation, storage and transportation. The photochemical production of H<small><sub>2</sub></small>O<small><sub>2</sub></small> serves as a promising alternative to the waste- and energy-intensive anthraquinone process. Following the 12 principles of Green Chemistry, we demonstrate a facile and general approach to sustainable catalyst development utilizing earth-abundant iron and biobased sources only. We developed several iron oxide (FeO<small><sub><em>x</em></sub></small>) nanoparticles (NPs) for successful photochemical oxygen reduction to H<small><sub>2</sub></small>O<small><sub>2</sub></small> under visible light illumination (445 nm). Achieving a selectivity for H<small><sub>2</sub></small>O<small><sub>2</sub></small> of &gt;99%, the catalyst material could be recycled for up to four consecutive rounds. An apparent quantum yield (AQY) of 0.11% was achieved for the photochemical oxygen reduction to H<small><sub>2</sub></small>O<small><sub>2</sub></small> with visible light (445 nm) at ambient temperatures and pressures (9.4–14.8 mmol g<small><sup>−1</sup></small> L<small><sup>−1</sup></small>). Reaching productivities of H<small><sub>2</sub></small>O<small><sub>2</sub></small> of at least 1.7 ± 0.3 mmol g<small><sup>−1</sup></small> L<small><sup>−1</sup></small> h<small><sup>−1</sup></small>, production of H<small><sub>2</sub></small>O<small><sub>2</sub></small> was further possible <em>via</em> sunlight irradiation and in seawater. Finally, a detailed mechanism has been proposed on the basis of experimental investigation of the catalyst's properties and computational results.</p>","PeriodicalId":72877,"journal":{"name":"EES catalysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ey/d3ey00256j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138515497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cyclic voltammetry activation of magnetron sputtered copper–zinc bilayer catalysts for electrochemical CO2 reduction† 磁控溅射铜锌双层催化剂的循环伏安活化研究
EES catalysis Pub Date : 2023-11-22 DOI: 10.1039/D3EY00204G
Yang Fu, Shilei Wei, Dongfeng Du and Jingshan Luo
{"title":"Cyclic voltammetry activation of magnetron sputtered copper–zinc bilayer catalysts for electrochemical CO2 reduction†","authors":"Yang Fu, Shilei Wei, Dongfeng Du and Jingshan Luo","doi":"10.1039/D3EY00204G","DOIUrl":"10.1039/D3EY00204G","url":null,"abstract":"<p >Electrocatalytic CO<small><sub>2</sub></small> reduction is regarded as one of the most promising strategies for converting CO<small><sub>2</sub></small> to valuable chemicals or fuels. However, developing efficient catalysts for enhanced multi-carbon production at industrial current densities is still a great challenge. Herein, we report a novel method to prepare bimetallic Cu–Zn catalysts for electrocatalytic CO<small><sub>2</sub></small> reduction using magnetron sputtering and subsequent electrochemical cyclic voltammetry treatment. Due to the increase of the Cu–Zn interface and the shortening of mass transfer distance, the bimetallic Cu–Zn catalysts showed a faradaic efficiency (FE) of 29.3% for ethanol production at a current density of −250 mA cm<small><sup>−2</sup></small> when testing in a flow cell. Our work provides a new strategy for the design and synthesis of bimetallic catalysts for electrocatalysis.</p>","PeriodicalId":72877,"journal":{"name":"EES catalysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ey/d3ey00204g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138515508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pt single crystal surfaces in electrochemistry and electrocatalysis 电化学和电催化中的铂单晶表面
EES catalysis Pub Date : 2023-11-20 DOI: 10.1039/D3EY00260H
Juan M. Feliu and Enrique Herrero
{"title":"Pt single crystal surfaces in electrochemistry and electrocatalysis","authors":"Juan M. Feliu and Enrique Herrero","doi":"10.1039/D3EY00260H","DOIUrl":"10.1039/D3EY00260H","url":null,"abstract":"<p >In this review, recent advances in the use of platinum single-crystal surfaces in electrochemistry are addressed. The starting point is the voltammetric characterization in a supporting electrolyte because the profile can be used as a fingerprint of the surface, allowing the surface quality and solution cleanliness to be established. The signals appearing in these voltammograms have been assigned to the adsorption of H, OH, and the anions in the supporting electrolyte. Then, the distinctive behavior of the Pt(111) electrode regarding the adsorption of species and the electrocatalysis in comparison with the other single-crystal surfaces is discussed. For the H/OH adsorption, the (111) ordered domain is the only one in which both processes appear in different potential windows. For the remaining ordered domains, steps, and kinks, both processes overlap, giving rise to signals that correspond to the competitive adsorption/desorption of OH and H. This fact implies that OH may be adsorbed on the surface at potentials as low as 0.15 V, which is a paradigm shift in the up-to-now prevailing understanding of the electrochemical behavior of platinum electrodes and has important implications for the elucidation of the mechanism of electrocatalytic reactions. The effects of this new knowledge on the proposed reaction mechanisms for the oxidation of CO and small organic molecules and the reduction of oxygen and hydrogen peroxide are discussed in detail. Since the elucidation of the reaction mechanisms requires in many cases the use of computational modeling, the conditions that the models should fulfill to reach valid conclusions are discussed. Relevant examples, which highlight the importance of the local structure of the interphase in the electrochemical behavior are given.</p>","PeriodicalId":72877,"journal":{"name":"EES catalysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ey/d3ey00260h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138515511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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