Electrocatalytic overall water splitting based on (ZnNiCoFeY)<inf>x</inf>O<inf>y</inf> high-entropy oxide supported on MoS<inf>2</inf>
Issued Date
2024-04-01
Resource Type
eISSN
10269185
Scopus ID
2-s2.0-85188803746
Journal Title
South African Journal of Chemical Engineering
Volume
48
Start Page
425
End Page
435
Rights Holder(s)
SCOPUS
Bibliographic Citation
South African Journal of Chemical Engineering Vol.48 (2024) , 425-435
Suggested Citation
Pathan S.C., Shaikh J.S., Shaikh N.S., Márquez V., Rittiruam M., Saelee T., Khajondetchairit P., Mali S.S., Patil J.V., Hong C.K., Praserthdam P., Praserthdam S. Electrocatalytic overall water splitting based on (ZnNiCoFeY)<inf>x</inf>O<inf>y</inf> high-entropy oxide supported on MoS<inf>2</inf>. South African Journal of Chemical Engineering Vol.48 (2024) , 425-435. 435. doi:10.1016/j.sajce.2024.03.012 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/97835
Title
Electrocatalytic overall water splitting based on (ZnNiCoFeY)<inf>x</inf>O<inf>y</inf> high-entropy oxide supported on MoS<inf>2</inf>
Corresponding Author(s)
Other Contributor(s)
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.