Amorphous outperforms crystalline nanomaterials: surface modifications of molecularly derived CoP electro(pre)catalysts for efficient water-splitting

dc.contributor.authorBeltrán-Suito, Rodrigo
dc.contributor.authorMenezes, Prashanth W.
dc.contributor.authorDrieß, Matthias
dc.date.accessioned2019-07-09T14:35:13Z
dc.date.available2019-07-09T14:35:13Z
dc.date.issued2019-06-04
dc.description.abstractThe single source precursor (SSP) approach was used to prepare highly active CoP bifunctional electro(pre)catalysts for the oxygen evolution reaction (OER), hydrogen evolution reaction (HER) and overall water splitting (OWS) reaction starting from a molecular β-diketiminato Co(I) cyclo-P4 complex. Crystalline or amorphous CoP particles were attained depending on the preparation route. Notably, the amorphous CoP displayed higher activity compared to the crystalline CoP on nickel foam (NF) and fluorinated tin oxide (FTO) substrates due to its unique electronic properties and surface characteristics. During the OER, severe oxidation to Co-oxy(hydroxides)/oxides by the loss of P was found to be crucial to increase the concentration of CoOx active sites. Interestingly, complete leaching of surface P from CoP and surface Co enrichment occurred during the HER. Finally, an OWS device was fabricated where the amorphous CoP outperformed the crystalline CoP with respect to low OWS cell voltage (with a difference of 130 mV) and enhanced stability for 5 days.en
dc.description.sponsorshipDFG, 390540038, EXC 2008: UniSysCaten
dc.description.sponsorshipTU Berlin, Open-Access-Mittel - 2019en
dc.identifier.eissn2050-7496
dc.identifier.issn2050-7488
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/9602
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-8648
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by-nc/3.0/en
dc.subject.ddc540 Chemie und zugeordnete Wissenschaftende
dc.subject.ddc530 Physikde
dc.subject.otherCoPen
dc.subject.otheroxygen evolution reactionen
dc.subject.othersingle source precursoren
dc.subject.otherhydrogen evolution reactionen
dc.subject.otheroverall water splittingen
dc.titleAmorphous outperforms crystalline nanomaterials: surface modifications of molecularly derived CoP electro(pre)catalysts for efficient water-splittingen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1039/C9TA04583Jen
dcterms.bibliographicCitation.journaltitleJournal of Materials Chemistry Aen
dcterms.bibliographicCitation.originalpublishernameRoyal Society of Chemistryen
dcterms.bibliographicCitation.originalpublisherplaceCambridgeen
dcterms.bibliographicCitation.pageend15756en
dcterms.bibliographicCitation.pagestart15749en
dcterms.bibliographicCitation.volume7en
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
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