Open AccessLow‐Crystalline AuCuIn Catalyst for Gaseous CO 2 Electrolyzer
Author(s) -
Han Gyeong Ho,
Kim Junhyeong,
Jang Seohyeon,
Kim Hyunki,
Guo Wenwu,
Hong Seokjin,
Shin Junhyeop,
Nam Inho,
Jang Ho Won,
Kim Soo Young,
Ahn Sang Hyun
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202104908
Subject(s) - overpotential , electrolysis , catalysis , faraday efficiency , crystallinity , materials science , chemical engineering , electrochemistry , cathode , carbon fibers , nanotechnology , inorganic chemistry , electrode , chemistry , organic chemistry , engineering , electrolyte , composite material , composite number
Despite its importance for the establishment of a carbon‐neutral society, the electrochemical reduction of CO 2 to value‐added products has not been commercialized yet because of its sluggish kinetics and low selectivity. The present work reports the fabrication of a low‐crystalline trimetallic (AuCuIn) CO 2 electroreduction catalyst and demonstrates its high performance in a gaseous CO 2 electrolyzer. The high Faradaic efficiency (FE) of CO formation observed at a low overpotential in a half‐cell test is ascribed to the controlled crystallinity and composition of this catalyst as well as to its faster charge transfer, downshifted d‐band center, and low oxophilicity. The gaseous CO 2 electrolyzer with the optimal catalyst as the cathode exhibits superior cell performance with a high CO FE and production rate, outperforming state‐of‐the‐art analogs. Thus, the obtained results pave the way to the commercialization of CO 2 electrolyzers and promote the establishment of a greener society.