Hydrogen production by water reduction on Si photocathode coupled with Ni2P

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dc.contributor.authorMondal, Indranilko
dc.contributor.authorMoon, Song Yiko
dc.contributor.authorKim, Heeyoungko
dc.contributor.authorPark, Jeong Youngko
dc.date.accessioned2019-04-15T14:14:04Z-
dc.date.available2019-04-15T14:14:04Z-
dc.date.created2019-04-08-
dc.date.issued2019-03-
dc.identifier.citationINTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.44, no.14, pp.7241 - 7251-
dc.identifier.issn0360-3199-
dc.identifier.urihttp://hdl.handle.net/10203/253971-
dc.description.abstractWhile searching for an efficient, non-noble, earth-abundant catalyst for the hydrogen evolution reaction (HER), we synthesized hexagonal dinickel phosphide with different nanostructures using solvothermal phosphidation. Coupled atop p-type Si, this catalyst performed as a p-n heterojunction photocathode assembly and the performance varied when under different electrolyte media. Apart from changing the surface morphology, Ni2P was crystallized with an increase in the Ni delta+/Ni2+ ratio as the phosphidation temperature gradually increased. A systematic evaluation of the water splitting reaction shows that a very small amount of catalyst (>85% transmittance for the catalyst layer) exhibits a photocurrent of -10 mA cm(-2 )with a positive applied potential of 0.05 V versus reversible hydrogen electrode under simulated solar irradiation of AM 1.5G. We discuss the substantial charge transfer process at the depletion layer of the electrode/catalyst and the catalyst/electrolyte interface. Mott-Shottky analysis showed a shift in the flat band potential for Ni2P, which reveals the underlying mechanism for the role of the p-n junction for enhanced photoelectrochemical cell performance. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.-
dc.languageEnglish-
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD-
dc.titleHydrogen production by water reduction on Si photocathode coupled with Ni2P-
dc.typeArticle-
dc.identifier.wosid000462102000020-
dc.identifier.scopusid2-s2.0-85061798496-
dc.type.rimsART-
dc.citation.volume44-
dc.citation.issue14-
dc.citation.beginningpage7241-
dc.citation.endingpage7251-
dc.citation.publicationnameINTERNATIONAL JOURNAL OF HYDROGEN ENERGY-
dc.identifier.doi10.1016/j.ijhydene.2019.01.258-
dc.contributor.localauthorPark, Jeong Young-
dc.contributor.nonIdAuthorMondal, Indranil-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorHexagonal Ni2P-
dc.subject.keywordAuthorSi photocathode-
dc.subject.keywordAuthorp-n heterojunction-
dc.subject.keywordAuthorElectronic structure-
dc.subject.keywordAuthorMott-Schottky analysis-
dc.subject.keywordPlusNICKEL PHOSPHIDE-
dc.subject.keywordPlusSILICON PHOTOCATHODES-
dc.subject.keywordPlusMOLYBDENUM SULFIDE-
dc.subject.keywordPlusHIGH-PERFORMANCE-
dc.subject.keywordPlusRADIAL JUNCTION-
dc.subject.keywordPlusEVOLUTION-
dc.subject.keywordPlusEFFICIENT-
dc.subject.keywordPlusGENERATION-
dc.subject.keywordPlusCATALYST-
dc.subject.keywordPlusELECTROCATALYST-
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