@article{Yang2023, 
author = {Xiaofeng Yang and Qinru Wang and Feiran Chen and Hu Zang and Changjiang Liu and Nan Yu and Baoyou Geng},
title = {In-situ electrochemical restructuring of Cu2BiSx solid solution into Bi/CuxSy heterointerfaces enabling stabilization intermediates for high-performance CO2 electroreduction to formate},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {5},
pages = {7974-7981},
keywords = {CO2 electroreduction, formate, in-situ electrochemical restructuring, heterointerfaces, current density},
url = {https://www.sciopen.com/article/10.1007/s12274-022-5337-8},
doi = {10.1007/s12274-022-5337-8},
abstract = {Bismuth-based materials are prevalent catalysts for CO2 electroreduction to formate, enduring high hydrogen evolution reactions and inadequate activity and stability. Herein, we reveal that in-situ electrochemical transformation of Cu2BiSx solid solution into Bi/CuxSy heterointerfaces, which can stabilize the intermediates and achieve highly selective and consistent CO2 electroreduction. It shows over 85% Faraday efficiency (FE) of formate with a potential window of −0.8 to −1.2 VRHE (RHE: reversible hydrogen electrode) and a stability above 90% over 27 h in H-type cell at −0.9 VRHE. It maintains more than 85% of FEformate at the current density of −25 to −200 mA·cm−2, and has stability of about 80% of FEformate at least 10 h at −150 mA·cm−2 in flow cell. In-situ Fourier transform infrared (FT-IR) spectroscopy measurement confirms that the preferred route of catalytic reaction is to generate *CO2− and *OCHO intermediates. The density functional theory (DFT) calculations illustrate that heterointerfaces facilitate the prior process of CO2 to HCOOH through *OCHO by additional Bi hybrid orbitals. This study is expected to open up a new idea for the design of CO2 electroreduction catalyst.}
}