Bismuth nanosheets with rich grain boundaries for efficient electroreduction of CO_(2)to formate under high pressures

作     者：Sunhong Ruan Biao Zhang Jinhan Zou Wanfu Zhong Xiaoyang He Jinhai Lu Qinghong Zhang Ye Wang Shunji Xie 阮孙红;张彪;邹金含;钟万福;何潇洋;卢进海;张庆红;王野;谢顺吉

作者机构：State Key Laboratory of Physical Chemistry of Solid SurfacesCollaborative Innovation Center of Chemistry for Energy MaterialsNational Engineering Laboratory for Green Chemical Productions of AlcoholsEthers and EstersCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM)Xiamen 361005FujianChina 

基　　金：国家科技部重点研发计划(2019YFE0104400) 国家自然科学基金(22022201,21972115,22121001) 福建省嘉庚创新实验室(RD2020020201) 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2022年第43卷第12期

页      码：3161-3169页

摘      要：Electrochemical CO_(2)reduction reaction(CO_(2)RR)driven by sustainable energy has emerged as an attractive route to achieve the target of carbon *** is one of the most economically viable products,and electrocatalytic CO_(2)RR to formate is a promising ***-pressure H-cell electrolyzer is easy to operate and allows high CO_(2)solubility for realizing high current density,but the design of highly efficient catalysts for working under high CO_(2)pressures remains ***-based catalysts exhibit high formate selectivity,but suffer from limited ***,we report a high-performance catalyst,which is derived from BiPO_(4)nanopolyhedrons during electrocatalytic CO_(2)RR to formate in neutral solution under high CO_(2)pressures.A high partial current density of formate(534 mA cm^(−2))and formate formation rate(9.9 mmol h^(−1) cm^(−2))with a formate Faradaic efficiency of 90%have been achieved over BiPO_(4)-derived catalyst at an applied potential of−0.81 V *** under 3.0 MPa CO_(2)*** discover that BiPO_(4)nanopolyhedrons evolve into metallic Bi nanosheets with rich grain boundaries in electrocatalytic CO_(2)RR under high CO_(2)pressures,and the grain boundaries of the BiPO_(4)-derived catalyst play a vital role in promoting electrocatalytic CO_(2)RR to *** theoretical studies reveal that the charge redistribution occurs at the grain boundaries of Bi surface,and this promotes CO_(2)activation and increases HCOO^(*)intermediate stability,thus making the pathway for CO_(2)RR to formate more selective and *** work not only demonstrates a highly efficient catalyst for CO_(2)RR to formate but also discovers a unique feature of catalyst evolution under high CO_(2)pressures.

主 题 词：Electrocatalytic CO_(2)reduction Formate High-pressure H-cell Bi nanosheet Grain boundary 

学科分类：081704[081704] 081705[081705] 07[理学] 070205[070205] 08[工学] 0817[工学-轻工类] 080501[080501] 070303[070303] 0805[工学-能源动力学] 0703[理学-化学类] 0702[理学-物理学类] 

核心收录：

D　O　I：10.1016/S1872-2067(22)64131-7

馆 藏 号：203115482...