Photoinducing different mechanisms on a co-ni bimetallic alloy in catalytic dry reforming of methane

Authors

Jinqiang Zhang
Kun Xie
Yichen Jiang
Meng Li
Xiaojie Tan
Ye Yang
Xiaoli Zhao, Edith Cowan University
Liang Wang
Yinfeng Wang
Xiaoyuan Wang
Yuezhao Zhu
Haijun Chen
Mingbo Wu
Hongqi Sun, Edith Cowan UniversityFollow
Shaobin Wang

Document Type

Journal Article

Publication Title

ACS Catalysis

First Page

10855

Last Page

10865

Publisher

ACS Publications

School

School of Science

RAS ID

62001

Funders

scientific and technological innovation project of carbon emission peak and carbon neutrality of Jiangsu Province / National Natural Science Foundation of China / Australian Research Council / ECU Vice-Chancellor's Professional Research Fellowship

Grant Number

ARC Numbers : DP200103206, DP190103548

Grant Link

http://purl.org/au-research/grants/arc/DP200103206 http://purl.org/au-research/grants/arc/DP190103548

Comments

Zhang, J., Xie, K., Jiang, Y., Li, M., Tan, X., Yang, Y., . . . Wang, S. (2023). Photoinducing different mechanisms on a co-ni bimetallic alloy in catalytic dry reforming of methane. ACS Catalysis, 13(16), 10855-10865. https://doi.org/10.1021/acscatal.3c02525

Abstract

Photothermal catalytic dry reforming of methane (DRM) is a promising process for simultaneous solar energy conversion and fossil fuel upgrading; however, its mechanistic difference from thermocatalysis has not been much investigated. Herein, we report a comprehensive mechanistic investigation of bimetal NiCo/SiO2 in photothermo- and thermocatalytic DRM. Co substitution in Ni/SiO2 poses a suppressing effect on thermocatalysis, while a promotion effect emerges after light irradiation. In situ diffuse reflectance infrared Fourier transform spectroscopy and theoretical simulations reveal that Co substitution thermodynamically inhibits the cleavage of C-H in methane, CO2 dissociation, and CO desorption in thermal catalysis. While energetic hot carriers are evidenced in the NiCo alloy under light irradiation, they directly activate reactant molecules and overcome the thermodynamic barriers to selectively promote the generation of *CHO to CO instead of *C to coke. Thus, NiCo/SiO2 achieves higher photo-to-thermal efficiency and prominent performance in photothermal catalytic DRM. This work unveils the intrinsic photo effects on non-noble bimetallic catalysts in photothermal catalytic DRM for developing robust photothermal DRM catalysts for practical applications.

DOI

10.1021/acscatal.3c02525

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