Photothermal Effect- and Interfacial Chemical Bond-Modulated NiOx/Ta3N5 Heterojunction for Efficient CO2 Photoreduction

被引：17

作者：

Pei L. ^{[1
]}

Wang X. ^{[2
]}

Zhu H. ^{[3
]}

Yu H. ^{[3
]}

Bandaru S. ^{[1
]}

Yan S. ^{[4
]}

Zou Z. ^{[4
]}

机构：

[1] College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou

[2] School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou

[3] School of Physical and Mathematical Sciences, Nanjing Tech University, No. 30, Puzhu Nanlu Road, Jiangsu, Nanjing

[4] Eco-materials and Renewable Energy Research Center (ERERC), Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing

来源：

ACS Applied Materials and Interfaces | 2023年 / 15卷 / 44期

基金：

中国国家自然科学基金;

关键词：

CO[!sub]2[!/sub] reduction; heterojunction; interfacial chemical bond; photothermal catalysis; Ta[!sub]3[!/sub]N[!sub]5[!/sub;

D O I：

10.1021/acsami.3c13538

中图分类号：

学科分类号：

摘要：

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 (≈32.3 μmol·g-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. © 2023 American Chemical Society

引用

页码：51300 / 51308

页数：8

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