期刊
ACS APPLIED MATERIALS & INTERFACES
卷 15, 期 44, 页码 51300-51308出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.3c13538
关键词
photothermal catalysis; CO2 reduction; Ta3N5; interfacial chemical bond; heterojunction
Photothermal catalysis is a promising method for converting CO2 into fuels, but developing efficient photothermal catalysts remains challenging. In this study, a composite structure composed of NiOx and Ta3N5 was fabricated, and the photothermal effect and interfacial chemical bonds were modulated to achieve efficient CO2 reduction.
Photothermal catalysis, which combines light promotion and thermal activation, is a promising approach for converting CO2 into fuels. However, the development of photothermal catalysts with effective light-to-heat conversion, strong charge transfer ability, and suitable active sites remains a challenge. Herein, the photothermal effect- and interfacial N-Ni/Ta-O bond-modulated heterostructure composed of oxygen vacancy-rich NiOx and Ta3N5 was rationally fabricated for efficient photothermal catalytic CO2 reduction. Beyond the charge separation capability conferred by the NiOx/Ta3N5 heterojunction, we observed that the N-Ni and Ta-O bonds linking NiOx and Ta3N5 form a spatial charge transfer channel, which enhances the interfacial electron transfer. Additionally, the presence of surface oxygen vacancies in NiOx induced nonradiative relaxation, resulting in a pronounced photothermal effect that locally heated the catalyst and accelerated the reaction kinetically. Leveraging these favorable factors, the NiOx/Ta3N5 hybrids exhibit remarkably elevated activity (approximate to 32.3 mu molg(-1)h(-1)) in the conversion of CO2 to CH4 with near-unity selectivity, surpassing the performance of bare Ta3N5 by over 14 times. This study unveils the synergistic effect of photothermal and interfacial chemical bonds in the photothermal-photocatalytic heterojunction system, offering a novel approach to enhance the reaction kinetics of various catalysts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据