格式化
铟
硫化物
法拉第效率
材料科学
二氧化碳电化学还原
能量转换效率
太阳能电池
化学工程
无机化学
化学
纳米技术
电化学
电极
光电子学
有机化学
冶金
催化作用
工程类
物理化学
一氧化碳
作者
Qixing Zhang,Jing Gao,Xinjiang Wang,Jianrong Zeng,Jun Li,Zhongke Wang,He Han,Jingshan Luo,Ying Zhao,Lijun Zhang,Michaël Grätzel,Xiaodan Zhang
出处
期刊:Joule
[Elsevier]
日期:2024-05-01
卷期号:8 (5): 1501-1519
标识
DOI:10.1016/j.joule.2024.03.008
摘要
Tremendous efforts have been made in developing highly selective catalysts for electrochemical CO2 conversion to formate. However, the rapid deactivation resulting from structural reconstruction and phase transition poses considerable challenges to the system's durability, particularly at industrially relevant current densities. In this study, we develop a stable hexagonal phase (γ-In2S3) catalyst, demonstrating exceptional selectivity toward formate production with a Faradaic efficiency exceeding 90% across a broad current range from −100 to −1,300 mA cm−2. Theoretical calculations suggest that the formation of sulfur (S) vacancy in γ-In2S3 is impeded under CO2 reduction conditions, thereby contributing to enhanced electrode stability during electrolysis. Further mechanism studies reveal that the persistence of the S atom enables electron-enriched indium (In)-active sites, likely modifying the adsorption/desorption of the key intermediates for formate production. When coupled with a commercial GaInP/GaAs/Ge triple-junction solar cell, the solar-assisted CO2 electrolysis reaches a benchmark solar-to-formate conversion efficiency of 14.3% under standard illumination.
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