Electrocatalytic overall water splitting based on (ZnNiCoFeY)xOy high-entropy oxide supported on MoS2

Sumayya C. Pathan; Jasmin S. Shaikh; Navajsharif S. Shaikh; Victor Márquez; Meena Rittiruam; Tinnakorn Saelee; Patcharaporn Khajondetchairit; Sawanta S. Mali; Jyoti V. Patil; Chang Kook Hong; Piyasan Praserthdam; Supareak Praserthdam

South African Journal of Chemical Engineering (Apr 2024)

Electrocatalytic overall water splitting based on (ZnNiCoFeY)xOy high-entropy oxide supported on MoS2

Sumayya C. Pathan,
Jasmin S. Shaikh,
Navajsharif S. Shaikh,
Victor Márquez,
Meena Rittiruam,
Tinnakorn Saelee,
Patcharaporn Khajondetchairit,
Sawanta S. Mali,
Jyoti V. Patil,
Chang Kook Hong,
Piyasan Praserthdam,
Supareak Praserthdam

Affiliations

Sumayya C. Pathan: High-Performance Computing Unit (CECC-HCU), Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand; Shaikh Research Group, Bangkok, 10330, Thailand
Jasmin S. Shaikh: High-Performance Computing Unit (CECC-HCU), Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand; Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand; Shaikh Research Group, Bangkok, 10330, Thailand
Navajsharif S. Shaikh: School of Materials Science and Innovation, Faculty of Science, Mahidol University, Nakhon Pathum, 73170, Thailand
Victor Márquez: Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand
Meena Rittiruam: High-Performance Computing Unit (CECC-HCU), Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand; Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand; Rittiruam Research Group, Bangkok, 10330, Thailand
Tinnakorn Saelee: High-Performance Computing Unit (CECC-HCU), Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand; Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand; Saelee Research Group, Bangkok, 10330, Thailand
Patcharaporn Khajondetchairit: High-Performance Computing Unit (CECC-HCU), Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand; Khajondetchairit Research Group, Bangkok, 10330, Thailand
Sawanta S. Mali: Polymer Energy Materials Laboratory, School of Chemical Engineering, Chonnam National University, Gwangju, 61186, South Korea
Jyoti V. Patil: Polymer Energy Materials Laboratory, School of Chemical Engineering, Chonnam National University, Gwangju, 61186, South Korea; Optoelectronic Convergence Research Center, Chonnam National University, Gwangju, 61186, South Korea
Chang Kook Hong: Polymer Energy Materials Laboratory, School of Chemical Engineering, Chonnam National University, Gwangju, 61186, South Korea; Optoelectronic Convergence Research Center, Chonnam National University, Gwangju, 61186, South Korea
Piyasan Praserthdam: Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand
Supareak Praserthdam: High-Performance Computing Unit (CECC-HCU), Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand; Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand; Corresponding author.

Journal volume & issue: Vol. 48
pp. 425 – 435

Abstract

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Hydrogen energy is a sustainable and clean source that can meet global energy demands without adverse environmental impacts. High-entropy oxides (HEOs), multielement (5 or more) oxides with an equiatomic or near-equatomic elemental composition, offer a novel approach to designing bifunctional electrocatalysts. This work explores (ZnNiCoFeY)xOy over MoS2 as a bifunctional electrocatalyst (HEO–MoS2) in an alkaline medium. The HEO was synthesized using a combustion process and loaded over MoS2 using an ultrasonic method. The synthesized HEO over MoS2 exhibits excellent performance, including long-term stability for over 24 h, an overpotential of 214 mV vs the reversible hydrogen electrode (RHE) for the hydrogen evolution reaction (HER), and 308 mV for the oxygen evolution reaction (OER) at 10 mA cm−2. This bifunctional electrocatalyst exhibits low overpotential for both the HER and the OER at high current densities. Additionally, HEO–MoS2 demonstrates smaller solution and charge transfer resistance values. The electrolyzer was assembled using bifunctional HEO–MoS2 electrodes for overall water splitting. These electrodes exhibited a low cell voltage of 1.65 V at 10 mA cm−2. The novel electrocatalyst was fabricated using a facile and scalable method that appeals to industrial applications.

Published in South African Journal of Chemical Engineering

ISSN: 1026-9185 (Print)
Publisher: Elsevier
Country of publisher: South Africa
LCC subjects: Technology: Chemical technology: Chemical engineering
Website: https://www.journals.elsevier.com/south-african-journal-of-chemical-engineering/

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