Hydrogen Evolution-Directed Electrodeposition of a Cobalt Selenide/Cobalt Oxide Electrocatalyst for the Hydrogen and Oxygen Evolution Reactions.

Gillian Collins, Daniele Alves, Tara Barwa, Raj Karthik, Sukanya Ramaraj, Carmel B Breslin

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Article in ACS applied energy materials, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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1 citing paper in PubMed.

Crystal Structure and Morphology-Controlled Synthesis of CoACS applied materials & interfaces · 2026
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6 authors.

Gillian CollinsDepartment of Chemistry, Maynooth University, Maynooth, Co. Kildare W23F2H6, Ireland.

Daniele AlvesDepartment of Chemistry, Maynooth University, Maynooth, Co. Kildare W23F2H6, Ireland.ORCID https://orcid.org/0000-0001-6786-8638

Tara BarwaDepartment of Chemistry, Maynooth University, Maynooth, Co. Kildare W23F2H6, Ireland.

Raj KarthikDepartment of Chemistry, Maynooth University, Maynooth, Co. Kildare W23F2H6, Ireland.ORCID https://orcid.org/0000-0002-8605-643X

Sukanya RamarajDepartment of Chemistry, Maynooth University, Maynooth, Co. Kildare W23F2H6, Ireland.

Carmel B BreslinDepartment of Chemistry, Maynooth University, Maynooth, Co. Kildare W23F2H6, Ireland.ORCID https://orcid.org/0000-0002-0586-5375

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

As more emphasis is placed on renewable energy worldwide, the electrochemical splitting of water has attracted considerable attention. Herein, a simple and cost-effective electrocatalyst was studied for both the hydrogen and oxygen evolution reactions. The electrocatalyst consisted of an electrodeposited cobalt diselenide/cobalt oxide composite, which was fabricated from an aqueous solution containing cobalt and selenium salts on a glassy carbon substrate. The optimal deposition conditions were found to be a fixed potential at -1.2 V vs Ag/AgCl for 400 s. At this relatively low potential, the electrodeposition process is accompanied by the hydrogen evolution reaction, resulting in a hierarchical, flower-like morphology. The electrochemical active surface area was calculated to be 89 cm

Indexed as

cobalt diselenidecobalt oxideelectrodepositionhydrogen evolution reactionoxygen evolution reactionrenewable hydrogen

Identifiers

PMID40881600

DOI10.1021/acsaem.5c02096

PMCPMC12381822

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