Efficient ultra-low voltage electrolysis of CO2 coupling with hydrazine oxidation degradation

被引：4

作者：

Pan, Weifan ^{[1
,2
,5
]}

Yuan, Jun ^{[1
,2
]}

Wang, Peng ^{[1
,2
]}

Wang, Jun ^{[1
,2
]}

Zhao, Yong ^{[4
]}

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

Yu, Hai ^{[4
]}

Wen, Zhenhai ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, CAS Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Fujian, Peoples R China

[2] Chinese Acad Sci, Fujian Prov Key Lab Mat & Tech Hydrogen Energy, Fuzhou 350002, Fujian, Peoples R China

[3] Jiangsu Univ, Sch Energy & Power Engn, Zhenjiang 212013, Peoples R China

[4] CSIRO Energy, 10 Murray Dwyer Circuit, Mayfield West, NSW 2304, Australia

[5] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2024年 / 351卷

基金：

中国国家自然科学基金;

关键词：

CO2; electrolysis; Hydrazine oxidation reaction; Ultralow voltage; Ni single atoms; CARBON; ELECTROCATALYST; CONVERSION; REDUCTION;

D O I：

10.1016/j.apcatb.2024.124011

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Transforming carbon dioxide (CO2) into valuable fuels or chemicals through electrolysis represents a promising approach to reduce the carbon footprint. Conventional CO2 electrolysis yet faces a challenge in low energy efficiency due to the energy-intensive oxygen evolution reaction (OER) occurring at the anode. In this study, we present an advanced CO2 electrolysis system that pairs cathodic CO2 reduction with anodic degradation of hydrazine oxidation reaction (HzOR), enabling efficient CO2 electrolysis at an ultra-low voltage. To achieve this objective, two precious-metal-free electrocatalysts have been designed and fabricated. Specifically, a nickel single-atom catalyst anchored on porous carbon nanofibers has been developed for cathodic CO2-to-CO conversion, while a flower-like Ni2Fe2N catalyst grown in-situ on nickel foam has been developed for anodic HzOR. We demonstrate high efficiency of CO production (FECO > 80%) at 100 mA cm(-2) with an applied voltage of only 0.45 V by simultaneously degrading hydrazine in a flow cell.

引用

页数：9

共 53 条

[1] CO2 reduction on gas-diffusion electrodes and why catalytic performance must be assessed at commercially-relevant conditions [J].