Copper oxide nanosheets for efficient electrochemical reduction of nitric oxide

被引：2

作者：

Shao, Jiaqi ^{[1
,2
]}

Wei, Pengfei ^{[1
]}

Wang, Shuo ^{[1
]}

Song, Yanpeng ^{[1
]}

Fu, Yunfan ^{[1
,2
]}

Li, Rongtan ^{[1
]}

Zhang, Xiaomin ^{[1
]}

Wang, Guoxiong ^{[1
]}

Bao, Xinhe ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Natl Lab Clean Energy, iChEM Collaborat Innovat Ctr Chem Energy Mat, State Key Lab Catalysis,Dalian Inst Chem Phys, Dalian 116023, Peoples R China

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

来源：

SCIENCE CHINA-MATERIALS | 2024年 / 67卷 / 06期

基金：

中国国家自然科学基金;

关键词：

electrocatalytic NORR; ammonia synthesis; electrocatalysis; CuO nanosheets; AMMONIA;

D O I：

10.1007/s40843-024-2830-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The removal of nitric oxide (NO) is deemed essential due to its environmental detrimental effects, and electrocatalytic NO reduction reaction (NORR) for ammonia synthesis presents a sustainable approach. In this work, we synthesized copper oxide (CuO) nanosheet catalyst with a high specific surface area and abundant defects. This catalyst exhibited a remarkable 92.1% ammonia Faradaic efficiency (FE) in a flow cell, accompanied by a current density of 1.1 A cm(-2) and an ammonia production rate of 7356 mu mol cm(-2) h(-1) at -0.26 V vs. reversible hydrogen electrode. The FE of ammonia remained above 80% during stability test for 50 h at a current density of more than 400 mA cm(-2). Quasi in situ X-ray photoelectron spectroscopy and in situ X-ray absorption spectroscopy revealed that the CuO nanosheets were electrochemically reduced to monomeric copper during NORR. Compared with Cu nanoparticles, the CuO nanosheets showed a high electrochemical surface area and high intrinsic activity for NORR.

引用

页码：1876 / 1881

页数：6

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