論文

査読有り
2020年6月

Thein situmorphology transformation of bismuth-based catalysts for the effective electroreduction of carbon dioxide

Sustainable Energy and Fuels
  • Xiaowei An
  • ,
  • Shasha Li
  • ,
  • Xiaoqiong Hao
  • ,
  • Xiao Du
  • ,
  • Tao Yu
  • ,
  • Zhongde Wang
  • ,
  • Xiaogang Hao
  • ,
  • Abuliti Abudula
  • ,
  • Guoqing Guan

4
6
開始ページ
2831
終了ページ
2840
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1039/d0se00228c

© The Royal Society of Chemistry 2020. Bismuth (Bi)-based catalysts have been widely used for the electroreduction of carbon dioxide (CO2). In this work, a Bi-based catalyst was electrodeposited on a Cu foam substrate and applied to the selective electrochemical reduction of CO2to formic acid (HCOOH). Anin situmorphological transformation phenomenon accompanied by the formation of petal-shaped bismuth subcarbonate (Bi2O2CO3) nanosheets was observed, and this resulted in enhanced electrocatalytic performance. By using this catalyst, the faradaic efficiency of the CO2to HCOOH process reached 92% at −1.6 V (vs.Ag/AgCl, −1.0 Vvs.RHE) with a total current density of 10 mA cm−2. Also, this electrocatalyst exhibited good stability during electrocatalysis for 20 h. Density functional theory calculations revealed thatin situ-formed Bi2O2CO3species enhanced the catalytic activity by stabilizing the *OOCH intermediate through the stronger orbital hybridization of Bi 6p of Bi2O2CO3with O 2p of *OOCH. As such, it can be considered that the rate-limiting step in the CO2electroreduction process should be the second electron transfer step, which is consistent with the Tafel slope analysis results.

リンク情報
DOI
https://doi.org/10.1039/d0se00228c
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85085963892&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85085963892&origin=inward
ID情報
  • DOI : 10.1039/d0se00228c
  • eISSN : 2398-4902
  • SCOPUS ID : 85085963892

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