Electrocatalytic overall water splitting based on (ZnNiCoFeY)xOy high-entropy oxide supported on MoS2
Pathan, Sumayya C. and Shaikh, Jasmin S. and Shaikh, Navajsharif S. and Márquez, Victor and Rittiruam, Meena and Saelee, Tinnakorn and Khajondetchairit, Patcharaporn and Mali, Sawanta S. and Patil, Jyoti V. and Hong, Chang Kook and Praserthdam, Piyasan and Praserthdam, Supareak (2024) Electrocatalytic overall water splitting based on (ZnNiCoFeY)xOy high-entropy oxide supported on MoS2. South African Journal of Chemical Engineering, 48. pp. 425-435. ISSN 1026-9185 (https://doi.org/10.1016/j.sajce.2024.03.012)
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Abstract
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.
ORCID iDs
Pathan, Sumayya C., Shaikh, Jasmin S., Shaikh, Navajsharif S., Márquez, Victor, Rittiruam, Meena, Saelee, Tinnakorn, Khajondetchairit, Patcharaporn, Mali, Sawanta S. ORCID: https://orcid.org/0000-0002-4973-4203, Patil, Jyoti V., Hong, Chang Kook, Praserthdam, Piyasan and Praserthdam, Supareak;-
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Item type: Article ID code: 90006 Dates: DateEventApril 2024Published20 March 2024Published Online19 March 2024AcceptedSubjects: Technology > Chemical engineering Department: Faculty of Science > Pure and Applied Chemistry Depositing user: Pure Administrator Date deposited: 23 Jul 2024 15:05 Last modified: 03 Oct 2024 09:50 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/90006