Publication:
NiMo/CoMoO4 heterostructure with confined oxygen vacancy for active and durable alkaline hydrogen evolution reaction

dc.contributor.coauthorErdem, Emre
dc.contributor.departmentDepartment of Chemistry
dc.contributor.departmentKUBAM (Koç University Boron and Advanced Materials Application and Research Center)
dc.contributor.departmentGraduate School of Sciences and Engineering
dc.contributor.kuauthorAydemir, Umut
dc.contributor.kuauthorSadeghi, Ebrahim
dc.contributor.kuauthorChamani, Sanaz
dc.contributor.kuauthorPeighambardoust, Naeimeh Sadat
dc.contributor.schoolcollegeinstituteCollege of Sciences
dc.contributor.schoolcollegeinstituteGRADUATE SCHOOL OF SCIENCES AND ENGINEERING
dc.contributor.schoolcollegeinstituteResearch Center
dc.date.accessioned2025-01-19T10:28:35Z
dc.date.issued2023
dc.description.abstractThe sluggish kinetics of electrocatalysts in the alkalinehydrogenevolution reaction (HER) is a critical challenge to attain efficientprogress in water electrolysis for carbon-neutral hydrogen production.Here, we present a high-performance and durable heterostructure ofNiMo/CoMoO4 for the alkaline HER constructed via a two-potin situ growth strategy on a nickel foam (NF). The density of activesites and the surface area of the hybrid catalyst augmented almostthree-fold compared to those of pristine CoMoO4. The heterostructurecomposed of metallic NiMo and oxygen vacancy (O-v)-confinedCoMoO(4) facilitated the H adsorption on the metallic sideand OH adsorption on the oxide side. The hierarchical hybrid catalyston NF featured a low overpotential of 102 mV at 10 mA cm(-2), approaching that of platinum on carbon (83 mV) in 1.0 M KOH. Theturnover frequency of 0.012 s(-1) at the overpotentialof 100 mV of NiMo/CoMoO4 is six times higher than thatof CoMoO4, 0.002 s(-1). In addition, thefabricated heterostructure is a highly durable HER catalyst at 30mA cm(-2) for 30 h. The Faradaic efficiency recordedby a gas chromatograph at 10 and 100 mA cm(-2) revealednearly 100 and 86-95% hydrogen production efficiency, respectively.
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.issue14
dc.description.openaccesshybrid
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuN/A
dc.description.volume6
dc.identifier.doi10.1021/acsaem.3c01146
dc.identifier.issn2574-0962
dc.identifier.quartileQ2
dc.identifier.scopus2-s2.0-85165920336
dc.identifier.urihttps://doi.org/10.1021/acsaem.3c01146
dc.identifier.urihttps://hdl.handle.net/20.500.14288/25754
dc.identifier.wos1023123500001
dc.keywordsElectrocatalysis
dc.keywordsHydrogen evolution reaction
dc.keywordsOxygen vacancy
dc.keywordsMetal oxides
dc.keywordsHeterostructure
dc.language.isoeng
dc.publisherAmerican Chemical Society
dc.relation.ispartofACS Applied Energy Materials
dc.subjectChemistry, physical
dc.subjectEnergy and fuels
dc.subjectMaterials science, multidisciplinary
dc.titleNiMo/CoMoO4 heterostructure with confined oxygen vacancy for active and durable alkaline hydrogen evolution reaction
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorAydemir, Umut
local.contributor.kuauthorPeighambardoust, Naeimeh Sadat
local.contributor.kuauthorChamani, Sanaz
local.contributor.kuauthorSadeghi, Ebrahim
local.publication.orgunit1College of Sciences
local.publication.orgunit1GRADUATE SCHOOL OF SCIENCES AND ENGINEERING
local.publication.orgunit1Research Center
local.publication.orgunit2Department of Chemistry
local.publication.orgunit2KUBAM (Koç University Boron and Advanced Materials Application and Research Center)
local.publication.orgunit2Graduate School of Sciences and Engineering
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