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Electroreduction of CO2 to Formate on a Copper-Based Electrocatalyst at High Pressures with High Energy Conversion Efficiency.
Li, Jiachen; Kuang, Yun; Meng, Yongtao; Tian, Xin; Hung, Wei-Hsuan; Zhang, Xiao; Li, Aowen; Xu, Mingquan; Zhou, Wu; Ku, Ching-Shun; Chiang, Ching-Yu; Zhu, Guanzhou; Guo, Jinyu; Sun, Xiaoming; Dai, Hongjie.
Afiliación
  • Li J; Department of Chemistry, Stanford University, Stanford, California 94305, United States.
  • Kuang Y; Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States.
  • Meng Y; Department of Chemistry, Stanford University, Stanford, California 94305, United States.
  • Tian X; State Key Laboratory of Chemical Resource Engineering and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
  • Hung WH; Department of Chemistry, Stanford University, Stanford, California 94305, United States.
  • Zhang X; Department of Chemistry, Stanford University, Stanford, California 94305, United States.
  • Li A; Department of Chemistry, Stanford University, Stanford, California 94305, United States.
  • Xu M; Institute of Materials Science and Engineering, National Central University, Taoyuan 32001, Taiwan.
  • Zhou W; Department of Chemistry, Stanford University, Stanford, California 94305, United States.
  • Ku CS; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
  • Chiang CY; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
  • Zhu G; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
  • Guo J; National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan.
  • Sun X; National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan.
  • Dai H; Department of Chemistry, Stanford University, Stanford, California 94305, United States.
J Am Chem Soc ; 142(16): 7276-7282, 2020 Apr 22.
Article en En | MEDLINE | ID: mdl-32250611
Electrocatalytic CO2 reduction (CO2RR) to valuable fuels is a promising approach to mitigate energy and environmental problems, but controlling the reaction pathways and products remains challenging. Here a novel Cu2O nanoparticle film was synthesized by square-wave (SW) electrochemical redox cycling of high-purity Cu foils. The cathode afforded up to 98% Faradaic efficiency for electroreduction of CO2 to nearly pure formate under ≥45 atm CO2 in bicarbonate catholytes. When this cathode was paired with a newly developed NiFe hydroxide carbonate anode in KOH/borate anolyte, the resulting two-electrode high-pressure electrolysis cell achieved high energy conversion efficiencies of up to 55.8% stably for long-term formate production. While the high-pressure conditions drastically increased the solubility of CO2 to enhance CO2 reduction and suppress hydrogen evolution, the (111)-oriented Cu2O film was found to be important to afford nearly 100% CO2 reduction to formate. The results have implications for CO2 reduction to a single liquid product with high energy conversion efficiency.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Am Chem Soc Año: 2020 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Am Chem Soc Año: 2020 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos