Crystalline Copper Selenide as a Reliable Non‐Noble Electro(pre)catalyst for Overall Water Splitting

dc.contributor.authorChakraborty, Biswarup
dc.contributor.authorBeltrán‐Suito, Rodrigo
dc.contributor.authorHlukhyy, Viktor
dc.contributor.authorSchmidt, Johannes
dc.contributor.authorMenezes, Prashanth W.
dc.contributor.authorDriess, Matthias
dc.date.accessioned2020-11-16T09:11:25Z
dc.date.available2020-11-16T09:11:25Z
dc.date.issued2020-05-07
dc.date.updated2020-11-02T15:02:37Z
dc.description.abstractElectrochemical water splitting remains a frontier research topic in the quest to develop artificial photosynthetic systems by using noble metal‐free and sustainable catalysts. Herein, a highly crystalline CuSe has been employed as active electrodes for overall water splitting (OWS) in alkaline media. The pure‐phase klockmannite CuSe deposited on highly conducting nickel foam (NF) electrodes by electrophoretic deposition (EPD) displayed an overpotential of merely 297 mV for the reaction of oxygen evolution (OER) at a current density of 10 mA cm−2 whereas an overpotential of 162 mV was attained for the hydrogen evolution reaction (HER) at the same current density, superseding the Cu‐based as well as the state‐of‐the‐art RuO2 and IrO2 catalysts. The bifunctional behavior of the catalyst has successfully been utilized to fabricate an overall water‐splitting device, which exhibits a low cell voltage (1.68 V) with long‐term stability. Post‐catalytic analyses of the catalyst by ex‐situ microscopic, spectroscopic, and analytical methods confirm that under both OER and HER conditions, the crystalline and conductive CuSe behaves as an electro(pre)catalyst forming a highly reactive in situ crystalline Cu(OH)2 overlayer (electro(post)catalyst), which facilitates oxygen (O2) evolution, and an amorphous Cu(OH)2/CuOx active surface for hydrogen (H2) evolution. The present study demonstrates a distinct approach to produce highly active copper‐based catalysts starting from copper chalcogenides and could be used as a basis to enhance the performance in durable bifunctional overall water splitting.en
dc.description.sponsorshipDFG, 390540038, EXC 2008: Unifying Systems in Catalysis "UniSysCat"en
dc.description.sponsorshipTU Berlin, Open-Access-Mittel – 2020en
dc.identifier.eissn1864-564X
dc.identifier.issn1864-5631
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/11956
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-10841
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subject.ddc540 Chemie und zugeordnete Wissenschaftende
dc.subject.othercopper selenideen
dc.subject.otherelectrocatalysisen
dc.subject.otherklockmanniteen
dc.subject.othernon-noble metal catalysten
dc.subject.otheroverall water splittingen
dc.titleCrystalline Copper Selenide as a Reliable Non‐Noble Electro(pre)catalyst for Overall Water Splittingen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1002/cssc.202000445en
dcterms.bibliographicCitation.issue12en
dcterms.bibliographicCitation.journaltitleChemSusChemen
dcterms.bibliographicCitation.originalpublishernameWileyen
dcterms.bibliographicCitation.originalpublisherplaceNew York, NYen
dcterms.bibliographicCitation.pageend3229en
dcterms.bibliographicCitation.pagestart3222en
dcterms.bibliographicCitation.volume13en
tub.accessrights.dnbfreeen
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Inst. Chemie::FG Metallorganische Chemie und Anorganische Materialiende
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.groupFG Metallorganische Chemie und Anorganische Materialiende
tub.affiliation.instituteInst. Chemiede
tub.publisher.universityorinstitutionTechnische Universität Berlinen

Files

Original bundle
Now showing 1 - 1 of 1
Loading…
Thumbnail Image
Name:
CSSC_CSSC202000445.pdf
Size:
1.53 MB
Format:
Adobe Portable Document Format
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
4.9 KB
Format:
Item-specific license agreed upon to submission
Description:

Collections