Pub Date : 2026-02-05DOI: 10.1016/j.checat.2025.101608
Dimitri Gatzios, Toghrul Azizli, Elena M. Meza Wynkoop, Stephen Stockton, Mia Chang, Matthew M. Montemore, Lucas D. Ellis
Supported metal oxide catalysts used for olefin metathesis suffer from low conversion of metal oxide precursors to metathesis-active metal oxo-alkylidenes, which has prompted recent efforts to enhance active site populations. In this work, we show that co-flowing H2 with olefins can significantly promote olefin metathesis activity on MoOx/SiO2 and WOx/SiO2 and can rapidly regenerate activity after poisoning with H2O vapor. Molecular H2 not only aids in surface oxygen removal to activate the metal oxide but also maintains steady-state metathesis activity up to 45-fold higher than with the reacting olefin alone. Our results suggest that the presence of H2 facilitates alkylidene active site regeneration via a Mo-hydride intermediate, significantly lowering the kinetic barrier for site formation compared with recently postulated silanol-facilitated activation mechanisms. Surprisingly, we show that even bulk MoO3 powder can be promoted by H2 co-flows into a metathesis-active catalyst. Further analysis is needed to fully understand these phenomena.
{"title":"Heterogeneous olefin metathesis promotion using molecular hydrogen","authors":"Dimitri Gatzios, Toghrul Azizli, Elena M. Meza Wynkoop, Stephen Stockton, Mia Chang, Matthew M. Montemore, Lucas D. Ellis","doi":"10.1016/j.checat.2025.101608","DOIUrl":"https://doi.org/10.1016/j.checat.2025.101608","url":null,"abstract":"Supported metal oxide catalysts used for olefin metathesis suffer from low conversion of metal oxide precursors to metathesis-active metal oxo-alkylidenes, which has prompted recent efforts to enhance active site populations. In this work, we show that co-flowing H<sub>2</sub> with olefins can significantly promote olefin metathesis activity on MoO<sub>x</sub>/SiO<sub>2</sub> and WO<sub>x</sub>/SiO<sub>2</sub> and can rapidly regenerate activity after poisoning with H<sub>2</sub>O vapor. Molecular H<sub>2</sub> not only aids in surface oxygen removal to activate the metal oxide but also maintains steady-state metathesis activity up to 45-fold higher than with the reacting olefin alone. Our results suggest that the presence of H<sub>2</sub> facilitates alkylidene active site regeneration via a Mo-hydride intermediate, significantly lowering the kinetic barrier for site formation compared with recently postulated silanol-facilitated activation mechanisms. Surprisingly, we show that even bulk MoO<sub>3</sub> powder can be promoted by H<sub>2</sub> co-flows into a metathesis-active catalyst. Further analysis is needed to fully understand these phenomena.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"177 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-05DOI: 10.1016/j.checat.2025.101630
Maxwell Goldman
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Maxwell Goldman received his PhD in corrosion science from the University of Western Ontario in 2019. He then conducted postdoctoral research on reactive carbon capture at the University of British Columbia (2019) before joining Twelve (2020) as a senior engineer. His current research interests include advancing electrochemical CO2 conversion for manufacturing fuels and chemicals.
{"title":"A guide to performing CO2 electrolysis in zero-gap electrolyzers","authors":"Maxwell Goldman","doi":"10.1016/j.checat.2025.101630","DOIUrl":"https://doi.org/10.1016/j.checat.2025.101630","url":null,"abstract":"<span><figure><span><img alt=\"\" height=\"302\" src=\"https://ars.els-cdn.com/content/image/1-s2.0-S2667109325003690-gr1.jpg\"/><ol><li><span><span>Download: <span>Download high-res image (559KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span>Maxwell Goldman received his PhD in corrosion science from the University of Western Ontario in 2019. He then conducted postdoctoral research on reactive carbon capture at the University of British Columbia (2019) before joining Twelve (2020) as a senior engineer. His current research interests include advancing electrochemical CO<sub>2</sub> conversion for manufacturing fuels and chemicals.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"72 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-28DOI: 10.1016/j.checat.2025.101582
Vaishnavi N. Nair, Madhu Sudan Manna, Tiffany A. Brisco, Joffrey Scriven, Simon De Kreijger, Ludovic Troian-Gautier, Uttam K. Tambar
{"title":"Photocatalytic carbonyl alkylative amination via direct C–H functionalization","authors":"Vaishnavi N. Nair, Madhu Sudan Manna, Tiffany A. Brisco, Joffrey Scriven, Simon De Kreijger, Ludovic Troian-Gautier, Uttam K. Tambar","doi":"10.1016/j.checat.2025.101582","DOIUrl":"https://doi.org/10.1016/j.checat.2025.101582","url":null,"abstract":"","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"55 1 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146072648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-23DOI: 10.1016/j.checat.2025.101580
Ran Wang, Xingzhu Liao, Jinzhen Huang, Xinghong Zhang, Xiaofeng Li, Xianjie Wang, Bo Song
Surface reconstruction is inevitable for oxygen evolution reaction (OER) electrocatalysts. Here, we report that pyrite-type iridium telluride (Ir3Te8) can undergo favorable surface reconstruction during the OER process in acid. Compared with a IrTe2 counterpart, the relatively weak Ir–Te bonds in Ir3Te8 facilitate the formation of a Ir3Te8/IrO2-TeO2 heterojunction. Strengthened orbital interaction between the reconstructed IrO2-TeO2 layer and Ir3Te8 optimizes the electronic structure to enhance the electrocatalytic activity. As a result, the reconstructed Ir3Te8 with a stable surface achieves a low overpotential of 467.8 mV at a current density of 1 A cm−2 and maintains stability over 1,000 h at 10 mA cm−2. Although surface reconstruction is inevitable, this work demonstrates that its positive impacts can be maximized through optimization of the structural characteristics of the initial iridium telluride polymorphs to customize the reconstruction process. This highlights a design strategy for advanced OER catalysts that operate in acidic environments, including Ir-based catalysts and beyond.
析氧反应（OER）电催化剂的表面重构是不可避免的。在这里，我们报道了黄铁矿型碲化铱（Ir3Te8）在酸的OER过程中可以进行良好的表面重建。与IrTe2相比，Ir3Te8中相对较弱的Ir-Te键有助于形成Ir3Te8/IrO2-TeO2异质结。重构的IrO2-TeO2层与Ir3Te8之间的轨道相互作用增强，优化了电子结构，提高了电催化活性。结果表明，具有稳定表面的重构Ir3Te8在1 a cm−2电流密度下获得了467.8 mV的低过电位，并在10 mA cm−2电流密度下保持了1,000 h以上的稳定性。虽然表面重建是不可避免的，但这项工作表明，通过优化初始碲化铱多晶的结构特征来定制重建过程，可以最大限度地发挥其积极影响。这突出了在酸性环境中工作的高级OER催化剂的设计策略，包括ir基催化剂和其他催化剂。
{"title":"Reconstructing a stable surface on pyrite-type iridium telluride to promote the oxygen evolution reaction in acid","authors":"Ran Wang, Xingzhu Liao, Jinzhen Huang, Xinghong Zhang, Xiaofeng Li, Xianjie Wang, Bo Song","doi":"10.1016/j.checat.2025.101580","DOIUrl":"https://doi.org/10.1016/j.checat.2025.101580","url":null,"abstract":"Surface reconstruction is inevitable for oxygen evolution reaction (OER) electrocatalysts. Here, we report that pyrite-type iridium telluride (Ir<sub>3</sub>Te<sub>8</sub>) can undergo favorable surface reconstruction during the OER process in acid. Compared with a IrTe<sub>2</sub> counterpart, the relatively weak Ir–Te bonds in Ir<sub>3</sub>Te<sub>8</sub> facilitate the formation of a Ir<sub>3</sub>Te<sub>8</sub>/IrO<sub>2</sub>-TeO<sub>2</sub> heterojunction. Strengthened orbital interaction between the reconstructed IrO<sub>2</sub>-TeO<sub>2</sub> layer and Ir<sub>3</sub>Te<sub>8</sub> optimizes the electronic structure to enhance the electrocatalytic activity. As a result, the reconstructed Ir<sub>3</sub>Te<sub>8</sub> with a stable surface achieves a low overpotential of 467.8 mV at a current density of 1 A cm<sup>−2</sup> and maintains stability over 1,000 h at 10 mA cm<sup>−2</sup>. Although surface reconstruction is inevitable, this work demonstrates that its positive impacts can be maximized through optimization of the structural characteristics of the initial iridium telluride polymorphs to customize the reconstruction process. This highlights a design strategy for advanced OER catalysts that operate in acidic environments, including Ir-based catalysts and beyond.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"71 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146021811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-15DOI: 10.1016/j.checat.2025.101609
Daniel C. Volke, Pablo I. Nikel
{"title":"A dual CO2 fixation cycle engineered in plants boosts growth and lipid synthesis","authors":"Daniel C. Volke, Pablo I. Nikel","doi":"10.1016/j.checat.2025.101609","DOIUrl":"https://doi.org/10.1016/j.checat.2025.101609","url":null,"abstract":"","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"32 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-15DOI: 10.1016/j.checat.2025.101572
Hao Li
In a recent Nature Catalysis paper, Hu, Xie, and co-workers present an element-based machine-learning potential trained with REICO (random exploration via “imaginary chemicals” optimization). This strategy shifts training from structure catalogs to diverse elemental interactions, yielding a general, reactive potential that enables on-the-fly simulations and a path toward replacing density functional theory (DFT) for complex systems.
{"title":"Generalizing reactivity for machine-learning potentials","authors":"Hao Li","doi":"10.1016/j.checat.2025.101572","DOIUrl":"https://doi.org/10.1016/j.checat.2025.101572","url":null,"abstract":"In a recent <em>Nature Catalysis</em> paper, Hu, Xie, and co-workers present an element-based machine-learning potential trained with REICO (random exploration via “imaginary chemicals” optimization). This strategy shifts training from structure catalogs to diverse elemental interactions, yielding a general, reactive potential that enables on-the-fly simulations and a path toward replacing density functional theory (DFT) for complex systems.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"48 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-15DOI: 10.1016/j.checat.2025.101631
Isabel Willis, Megan E. Fieser
{"title":"Mild methods for converting PVC and polyolefin mixed waste into fuel-range hydrocarbons","authors":"Isabel Willis, Megan E. Fieser","doi":"10.1016/j.checat.2025.101631","DOIUrl":"https://doi.org/10.1016/j.checat.2025.101631","url":null,"abstract":"","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"100 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-15DOI: 10.1016/j.checat.2025.101632
Jackson T. Calhoun, Shaun M.K. McKinnie
In a recent Nature Biotechnology article, Bushin et al. elegantly rewire the metabolic machinery of a genetically tractable bacterium to intertwine its survival with the production of an exogenously introduced specialized metabolite. This “growth-coupled biosynthesis” approach resulted in impressive gram-scale titers of ommochrome animal pigments with useful biomedical applications.
{"title":"Break it to make it: Rewiring bacterial metabolism for the growth-coupled biosynthesis of xanthommatin animal pigments","authors":"Jackson T. Calhoun, Shaun M.K. McKinnie","doi":"10.1016/j.checat.2025.101632","DOIUrl":"https://doi.org/10.1016/j.checat.2025.101632","url":null,"abstract":"In a recent <em>Nature Biotechnology</em> article, Bushin et al. elegantly rewire the metabolic machinery of a genetically tractable bacterium to intertwine its survival with the production of an exogenously introduced specialized metabolite. This “growth-coupled biosynthesis” approach resulted in impressive gram-scale titers of ommochrome animal pigments with useful biomedical applications.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"46 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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