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Research Article | Open Access | Online First

Theoretical catalytic performance of single-atom catalysts M1/PW12O40 for alkyne hydrogenation materials

Shamraiz Hussain Talib2, Xuelian Jiang3, Shixiang Feng4, Mengdie Zhao1, Qi Yu1,3( )
School of Materials Science and Engineering, and Shaanxi Laboratory of Catalysis, Shaanxi University of Technology, Hanzhong 723001, China
Center for Catalysis and Separations, Khalifa University of Science and Technology, Abu Dhabi, P.O. Box 127788, United Arab Emirates
Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China
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Abstract

Single-atom catalysts (SACs) have provoked significant curiosity in heterogeneous catalysis due to the benefits of maximum metal atoms usage, robust metal-support interaction, single-metal-atom active sites, and high catalytic efficiency. In this study, the electronic structures and catalytic mechanism of ethyne hydrogenation of SACs with the group-9 metal atoms M1 (M1= Co, Rh, Ir) anchored on PTA (phosphotungstic acid) cluster have been explored by using first-principles quantum calculations. It is found that the catalytic activity of ethyne (C2H2) hydrogenation is determined by two critical parameters: the adsorption energies of the adsorbate (H2, C2H2) and the activation energy barrier of ethyne hydrogenation. We have shown that the reaction pathway of ethyne hydrogenation reaction on the experimentally characterized Rh1/PTA at room temperature consists of three steps: C2H2 and H2 coadsorption on Rh1/PTA, H2 attacking C2H2 to form C2H4, then C2H4 desorbing or further reacting with H2 to produce C2H6 and completing the catalytic cycle. The Rh1/PTA possesses fair catalytic activity with a C2H4 desorption energy of 1.46 eV and a 2.59 eV barrier for ethylene hydrogenation. Moreover, micro-kinetics analysis is also carried out to understand the mechanism and catalytic performance further. The work reveals that the PTA-supported SACs can be a promising catalyst for alkyne hydrogenation.

Keywords

single-atom catalystphosphotungstic acidalkyne hydrogenationtransition metal atomsfirst-principles calculations

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Nano Research Energy
DOI: 10.26599/NRE.2024.9120128
Cite this article:
Talib SH, Jiang X, Feng S, et al. Theoretical catalytic performance of single-atom catalysts M1/PW12O40 for alkyne hydrogenation materials. Nano Research Energy, 2024, https://doi.org/10.26599/NRE.2024.9120128

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Received: 11 April 2024
Revised: 16 May 2024
Accepted: 24 May 2024
Published: 12 June 2024
© The Author(s) 2024. Published by Tsinghua University Press.

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