文献类型：期刊文献

英文题名：A stability strategy for doped modified bismuth sulfide in CO2RR for reducing CO2 to HCOOH

作者：Xu, Changjian[1];Li, Yingyun[1];Li, Ruizhu[2];Gao, Na[2];Du, Xian-Long[2];Li, Tao[1];Wang, Jian-Qiang[2,3];Xiao, Guoping[2,3]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, State Key Lab Chem Engn, Minist Educ, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China;[3]Univ Chinese Acad Sci, Beijing 100049, Peoples R China

年份：2025

卷号：698

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20252318539522);WOS:【SCI-EXPANDED(收录号:WOS:001516326200007)】；

基金：This work was supported by the National Key R & D Program of China (2024YFB4106400) , the Shanghai Municipal Science and Technology Program (Grant No. 21DZ1207700) , the National Natural Science Foundation of China (22209200 and 52302331) .

语种：英文

外文关键词：CO 2 RR; HCOOH; Sulfide

摘要：The electrochemical carbon dioxide reduction reaction (CO2RR) offers a promising approach to convert CO2 into high-value chemical while mitigating emission and utilizing of carbon resources efficiently. In this paper, we presented an effective approach using bismuth sulfide (Bi2S3) catalyst for CO2RR, achieving selective and stable formic acid (HCOOH). Over a broad voltage range -0.6 to -1.4 V vs. reversible hydrogen electrode (RHE), the Faraday efficiency (FE) of HCOOH remained consistently above 95 %, with a peak FE of 96 % at -1.3 V vs. RHE, accompanied by a peak partial current density (jHCOOH) of -304 mA/cm2. Stability tests demonstrated a minimal FE decline and only a 7 % drop in current density after 10 h, attributed to inevitable flushing effects in the flowcell. Under hydrothermal synthesis conditions, systematic investigations revealed that increased temperature and optimized sulfur content induced a morphological transformation from nanorods to nanosheets, as observed via electron microscopy. This structural evolution enhanced both FE and stability across a broad voltage range. Insitu spectroscopy and experimental analysis further indicated that sulfur doping modulated the electronic structure of bismuth, promoting the formation of the key intermediate HCOO* and facilitating HCOOH production. This work demonstrates an efficient and durable electrocatalyst for sustainable HCOOH synthesis.