Reaction Mechanism of the Enhanced Reaction Activity and Rate of N-Doped CoO Photocatalysts for Photoreduction of CO2 in Air

被引：7

作者：

Wu, Jingjing ^{[1
]}

Chen, Jie ^{[2
]}

Hao, Jingxuan ^{[1
]}

Ni, Baoxin ^{[1
]}

Yang, Dong ^{[1
]}

Zhu, Sheng ^{[1
,3
]}

Xu, Qunjie ^{[1
,3
]}

Min, Yulin ^{[1
,3
]}

机构：

[1] Shanghai Univ Elect Power, Shanghai Key Lab Mat Protect & Adv Mat Elect Powe, Shanghai Engn Res Ctr Energy Saving Heat Exchange, Shanghai 200090, Peoples R China

[2] Shanghai Inst Satelite Engn, Off Res Affairs, Shanghai 201109, Peoples R China

[3] Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

来源：

ACS APPLIED ENERGY MATERIALS | 2022年 / 5卷 / 01期

基金：

中国国家自然科学基金;

关键词：

N-doped CoO; low-concentration CO2; photocatalytic; CO2 reduction reaction; in situ spectroscopy; EFFICIENT; REDUCTION;

D O I：

10.1021/acsaem.1c02856

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：

The use of light to directly reduce CO2 in the atmosphere is the actual development trend of photocatalysis applications in the future. However, it is still in the initial stage of exploration. In this work, oleylamine is used as a template in a onestep hydrothermal method to obtain the N-doped CoO catalyst that can be used to efficiently reduce CO2 in air. N-doped CoO achieves ultrahigh CO2 conversion efficiency (about 75%), amazing CO yield (2.902 mmol g(-1) h(-1)), and superior CO conversion frequency (TOFCO > 300) in air. However, in a 0.03% simulated atmosphere (Ar/CO2), the CO precipitation rate drops by 18 times, while the H-2 precipitation rate increases significantly. Quasi-in situ spectroscopy and experimental studies show that O-2 in the CO2 reduction process will promote the formation of an amorphous layer with a small number of hydroxyl groups on the surface of N-doped CoO. This amorphous/crystalline interface will effectively promote the catalytic reduction of CO2. This work has inspired further research on the photoreduction process of low-concentration CO2 in the future.

引用

页码：330 / 342

页数：13