甲酸
格式化
铋
催化作用
无机化学
化学
电化学
电催化剂
交换电流密度
硫化物
电流密度
材料科学
电极
物理化学
有机化学
塔菲尔方程
物理
量子力学
作者
Zinan Jiang,Shan Ren,Xi Cao,Qikui Fan,Rui Yu,Jian Yang,Junjie Mao
标识
DOI:10.1002/anie.202408412
摘要
Abstract The practical application of the electrocatalytic CO 2 reduction reaction (CO 2 RR) to form formic acid fuel is hindered by the limited activation of CO 2 molecules and the lack of universal feasibility across different pH levels. Herein, we report a doping‐engineered bismuth sulfide pre‐catalyst (BiS‐1) that S is partially retained after electrochemical reconstruction into metallic Bi for CO 2 RR to formate/formic acid with ultrahigh performance across a wide pH range. The best BiS‐1 maintains a Faraday efficiency (FE) of ~95 % at 2000 mA cm −2 in a flow cell under neutral and alkaline solutions. Furthermore, the BiS‐1 catalyst shows unprecedentedly high FE (~95 %) with current densities from 100 to 1300 mA cm −2 under acidic solutions. Notably, the current density can reach 700 mA cm −2 while maintaining a FE of above 90 % in a membrane electrode assembly electrolyzer and operate stably for 150 h at 200 mA cm −2 . In situ spectra and density functional theory calculations reveals that the S doping modulates the electronic structure of Bi and effectively promotes the formation of the HCOO* intermediate for formate/formic acid generation. This work develops the efficient and stable electrocatalysts for sustainable formate/formic acid production.
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