Amorphous Sn(HPO4)2-derived phosphorus-modified Sn/SnOx core/shell catalyst for efficient CO2 electroreduction to formate

被引：10
作者：
Cheng, Chunfeng [1 ,2 ]
Liu, Tianfu [1 ]
Wang, Yi [1 ,2 ]
Wei, Pengfei [1 ,2 ]
Sang, Jiaqi [1 ,2 ]
Shao, Jiaqi [1 ,2 ]
Song, Yanpeng [1 ]
Zang, Yipeng [1 ]
Gao, Dunfeng [1 ]
Wang, Guoxiong [1 ]
机构：
[1] Chinese Acad Sci, Dalian Inst Chem Phys, iChEM Collaborat Innovat Ctr Chem Energy Mat, State Key Lab Catalysis,Dalian Natl Lab Clean Ener, Dalian 116023, Liaoning, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
JOURNAL OF ENERGY CHEMISTRY | 2023年 / 81卷
基金：
国家重点研发计划; 中国博士后科学基金; 中国国家自然科学基金;
关键词：
CO2; electroreduction; Structural evolution; Reaction intermediate; Phosphorus modification; Stability; ELECTROCHEMICAL REDUCTION; NANOPARTICLES; CARBON; ELECTROCATALYST; SELECTIVITY; PHOSPHATE;
D O I：
10.1016/j.jechem.2022.12.022
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Simultaneously achieving high activity, selectivity and stability for electrochemical CO2 reduction reac-tion (CO2RR) remains great challenges. Herein, a phosphorus-modified Sn/SnOx core/shell (P-Sn/SnOx) catalyst, derived from in situ electrochemical reduction of an amorphous Sn(HPO4)2 pre-catalyst, exhibits high CO2RR performance. The total Faradaic efficiency (FE) of C1 products is close to 100% in a broad potential range from-0.49 to-1.02 V vs. reversible hydrogen electrode, and a total current density of 315.0 mA cm-2 is achieved. Moreover, the P-Sn/SnOx catalyst maintains a formate FE of-90% for 120 h. Density functional theory calculations suggest that the phosphorus-modified Sn/SnOx core/shell structure effectively facilitates formate production by enhancing CO2 adsorption and improving free energy profile of formate formation. (c) 2022 SOCIETY. Published by ELSEVIERCOMPANY All rights reserved.
引用
收藏
页码：125 / 131
页数：7
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