Bifunctional Nb-N-C atomic catalyst for aqueous Zn-air battery driving CO2 electrolysis

被引：79

作者：

Gao, Sanshuang ^{[1
]}

Wang, Tianwei ^{[1
,2
,3
]}

Jin, Mengmeng ^{[1
]}

Zhang, Shusheng ^{[4
]}

Liu, Qian ^{[5
]}

Hu, Guangzhi ^{[6
]}

Yang, Hui ^{[1
]}

Luo, Jun ^{[1
,7
]}

Liu, Xijun ^{[2
,3
]}

机构：

[1] Tianjin Univ Technol, Sch Mat Sci & Engn, Inst New Energy Mat & Low Carbon Technol, Tianjin Key Lab Photoelect Mat & Devices, Tianjin 300384, Peoples R China

[2] Guangxi Univ, MOE Key Lab New Proc Technol Nonferrous Met & Mat, Sch Resource Environm & Mat, Nanning 530004, Peoples R China

[3] Guangxi Univ, Guangxi Key Lab Proc Nonferrous Met & Featured Ma, Sch Resource Environm & Mat, Nanning 530004, Peoples R China

[4] Zhengzhou Univ, Coll Chem, Zhengzhou 450000, Peoples R China

[5] Chengdu Univ, Inst Adv Study, Chengdu 610106, Sichuan, Peoples R China

[6] Yunnan Univ, Inst Ecol Res & Pollut Control Plateau Lakes, Sch Ecol & Environm Sci, Kunming 650504, Yunnan, Peoples R China

[7] Univ Elect Sci & Technol China, Shenzhen Inst Adv Study, Shenzhen 518110, Peoples R China

来源：

SCIENCE CHINA-MATERIALS | 2023年 / 66卷 / 03期

基金：

中国国家自然科学基金;

关键词：

bifunctional catalyst; carbon dioxide reduction reaction; oxygen reduction reaction; Zn-air battery; self-powered CO2 electrolysis; DOPED POROUS CARBON; OXYGEN; ELECTROCATALYST; FIXATION; SITES;

D O I：

10.1007/s40843-022-2236-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Designing efficient and cost-effective bifunctional catalysts is desirable for carbon dioxide and oxygen reduction reactions (CO2RR and ORR) to address carbon neutralization and energy conversion. Herein, a bifunctional CO2RR and ORR catalyst for aqueous Zn-air battery (ZAB) self-driving CO2RR electrolysis is developed using atomically dispersed niobium anchored onto N-doped ordered mesoporous carbon (Nb-N-C). The Nb-N-C atomic catalyst demonstrates aqueous CO2RR activity with CO Faradaic efficiency up to 90%, ORR activity with a half-wave potential of 0.84 V vs. reversible hydrogen electrode, and ZAB activity with a peak power density of 115.6 mW cm(-2), owing to the high Nb atom-utilization efficiency and ordered mesoporous structure. Furthermore, two-unit ZABs in series, serving as the power source for the self-powered CO2 electrolysis system, continuously convert CO2 to CO with average productivity of 3.75 mu mol h(-1) mg(cat)(-1) during the first 10 h. Moreover, theoretical calculations exhibit that atomic Nb anchored to N-doped carbon can form Nb-N coordination bonds, effectively reducing the energy barriers of potential-determining *COOH for CO2RR and *O formation for ORR.

引用

页码：1013 / 1023

页数：11

共 95 条

[61] Metal-Free Nitrogen-Doped Mesoporous Carbon for Electroreduction of CO2 to Ethanol [J].