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The Role of Bismuth in Suppressing the CO Poisoning in Alkaline Methanol Electrooxidation: Switching the Reaction from the CO to Formate Pathway.
Wang, Xuchun; Liu, Yu; Ma, Xing-Yu; Chang, Lo-Yueh; Zhong, Qixuan; Pan, Qi; Wang, Zhiqiang; Yuan, Xiaolei; Cao, Muhan; Lyu, Fenglei; Yang, Yaoyue; Chen, Jinxing; Sham, Tsun-Kong; Zhang, Qiao.
Afiliación
  • Wang X; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China.
  • Liu Y; Department of Chemistry, and Soochow-Western Center for Synchrotron Radiation Research, University of Western Ontario, London, Ontario N6A5B7, Canada.
  • Ma XY; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China.
  • Chang LY; Key Laboratory of General Chemistry of National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China.
  • Zhong Q; National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan.
  • Pan Q; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China.
  • Wang Z; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China.
  • Yuan X; Department of Chemistry, and Soochow-Western Center for Synchrotron Radiation Research, University of Western Ontario, London, Ontario N6A5B7, Canada.
  • Cao M; School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China.
  • Lyu F; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China.
  • Yang Y; Soochow Institute for Energy and Materials Innovations, College of Energy, Soochow University, Suzhou 215006, China.
  • Chen J; Key Laboratory of General Chemistry of National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China.
  • Sham TK; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China.
  • Zhang Q; Department of Chemistry, and Soochow-Western Center for Synchrotron Radiation Research, University of Western Ontario, London, Ontario N6A5B7, Canada.
Nano Lett ; 23(2): 685-693, 2023 Jan 25.
Article en En | MEDLINE | ID: mdl-36594847
ABSTRACT
While tuning the electronic structure of Pt can thermodynamically alleviate CO poisoning in direct methanol fuel cells, the impact of interactions between intermediates on the reaction pathway is seldom studied. Herein, we contrive a PtBi model catalyst and realize a complete inhibition of the CO pathway and concurrent enhancement of the formate pathway in the alkaline methanol electrooxidation. The key role of Bi is enriching OH adsorbates (OHad) on the catalyst surface. The competitive adsorption of CO adsorbates (COad) and OHad at Pt sites, complementing the thermodynamic contribution from alloying Bi with Pt, switches the intermediate from COad to formate that circumvents CO poisoning. Hence, 8% Bi brings an approximately 6-fold increase in activity compared to pure Pt nanoparticles. This notion can be generalized to modify commercially available Pt/C catalysts by a microwave-assisted method, offering opportunities for the design and practical production of CO-tolerance electrocatalysts in an industrial setting.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2023 Tipo del documento: Article
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2023 Tipo del documento: Article