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Synergistic Effect of Grain Boundaries and Oxygen Vacancies on Enhanced Selectivity for Electrocatalytic CO2 Reduction.
Wei, Xiaoqian; Li, Zijian; Jang, Haeseong; Wang, Zhe; Zhao, Xuhao; Chen, Yunfei; Wang, Xuefeng; Kim, Min Gyu; Liu, Xien; Qin, Qing.
Afiliação
  • Wei X; College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
  • Li Z; Department of Chemistry, City University of Hong Kong, Hong Kong, 999077, China.
  • Jang H; Department of Advanced Materials Engineering, Chung-Ang University, Anseong-si, Gyeonggi-do, 17546, South Korea.
  • Wang Z; College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
  • Zhao X; College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
  • Chen Y; College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
  • Wang X; College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
  • Kim MG; Beamline Research Division, Pohang Accelerator Laboratory (PAL), Pohang, 37673, South Korea.
  • Liu X; College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
  • Qin Q; College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
Small ; 20(24): e2311136, 2024 Jun.
Article em En | MEDLINE | ID: mdl-38148296
ABSTRACT
Dual-engineering involved of grain boundaries (GBs) and oxygen vacancies (VO) efficiently engineers the material's catalytic performance by simultaneously introducing favorable electronic and chemical properties. Herein, a novel SnO2 nanoplate is reported with simultaneous oxygen vacancies and abundant grain boundaries (V,G-SnOx/C) for promoting the highly selective conversion of CO2 to value-added formic acid. Attributing to the synergistic effect of employed dual-engineering, the V,G-SnOx/C displays highly catalytic selectivity with a maximum Faradaic efficiency (FE) of 87% for HCOOH production at -1.2 V versus RHE and FEs > 95% for all C1 products (CO and HCOOH) within all applied potential range, outperforming current state-of-the-art electrodes and the amorphous SnOx/C. Theoretical calculations combined with advanced characterizations revealed that GB induces the formation of electron-enriched Sn site, which strengthens the adsorption of *HCOO intermediate. While GBs and VO synergistically lower the reaction energy barrier, thus dramatically enhancing the intrinsic activity and selectivity toward HCOOH.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article