Experimental and theoretical investigation of high-entropy-alloy/support as a catalyst for reduction reactions.

Al Zoubi, Wail, Assfour, Bassem, Wahab Allaf, Abdul, Leoni, Stefano ORCID: https://orcid.org/0000-0003-4078-1000, Kang, Jee-Hyun and Ko, Young Gun 2023. Experimental and theoretical investigation of high-entropy-alloy/support as a catalyst for reduction reactions. Journal of Energy Chemistry 81 , pp. 132-142. 10.1016/j.jechem.2023.02.042

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Abstract

Control of chemical composition and incorporation of multiple metallic elements into a single metal nanoparticle (NP) in an alloyed or a phase-segregated state hold potential scientific merit; however, developing libraries of such structures using effective strategies is challenging owing to the thermodynamic immiscibility of repelling constituent metallic elements. Herein, we present a one-pot interfacial plasma–discharge-driven (IP-D) synthesis strategy for fabricating stable high-entropy-alloy (HEA) NPs exhibiting ultrasmall size on a porous support surface. Accordingly, an electric field was applied for 120 s to enhance the incorporation of multiple metallic elements (i.e., CuAgFe, CuAgNi, and CuAgNiFe) into ally HEA-NPs. Further, NPs were attached to a porous magnesium oxide surface via rapid cooling. With solar light as the sole energy input, the CuAgNiFe catalyst was investigated as a reusable and sustainable material exhibiting excellent catalytic performance (100% conversion and 99% selectivity within 1 min for a hydrogenation reaction) and consistent activity even after 20 cycles for a reduction reaction, considerably outperforming the majority of the conventional photocatalysts. Thus, the proposed strategy establishes a novel method for designing and synthesizing highly efficient and stable catalysts for the convertion of nitroarenes to anilines via chemical reduction.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Advanced Research Computing @ Cardiff (ARCCA) Chemistry
Publisher:	Elsevier
ISSN:	2095-4956
Date of First Compliant Deposit:	13 April 2023
Date of Acceptance:	24 February 2023
Last Modified:	08 Nov 2024 22:45
URI:	https://orca.cardiff.ac.uk/id/eprint/158336

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