Porous Co-P foam as an efficient bifunctional electrocatalyst for hydrogen and oxygen evolution reactions

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dc.contributor.authorOh, Se-Kwonko
dc.contributor.authorKim, Hyo Wonko
dc.contributor.authorKwon, Yong Kuenko
dc.contributor.authorKim, MinJoongko
dc.contributor.authorCho, Eun Aeko
dc.contributor.authorKwon, Hyuk-Sangko
dc.date.accessioned2017-01-12T06:29:41Z-
dc.date.available2017-01-12T06:29:41Z-
dc.date.created2016-12-26-
dc.date.created2016-12-26-
dc.date.issued2016-12-
dc.identifier.citationJOURNAL OF MATERIALS CHEMISTRY A, v.4, no.47, pp.18272 - 18277-
dc.identifier.issn2050-7488-
dc.identifier.urihttp://hdl.handle.net/10203/218235-
dc.description.abstractA high-performance bifunctional Co-P foam catalyst was successfully synthesized by facile one-step electrodeposition at a high cathodic current density. The synthetic approach includes fast generation of hydrogen bubbles as well as fast deposition of Co-P, which played a key role in forming a porous Co-P foam structure. The Co-P foam exhibits remarkable electrocatalytic activity and stability in both acidic and alkaline solution. Its HER activity was recorded with an over potential of 50 mV in 0.5 M H2SO4 and 131 mV in 1 M KOH at 10 mA cm(-2), which is comparable to that of commercial Pt/C (eta@10 mA cm(0.5 M H2SO4)(-2): 33 mV, (eta 10) (mA), (1M) (KOH): 80 mV). The Co-P foam (eta@10 mA cm(-2): 300 mV) exhibits better OER activities than Ir/C (n@10 mA cm(-2): 345 mV) and RuO2 (eta@10 mA cm(-2): 359 mV) in 1 M KOH solution. The excellent performance of the Co-P foam as an HER and OER catalyst can be attributed to the charge separation between Co and P in Co-P foam as well as the porous foam structure providing a large electrochemically active surface area (ECSA). The ECSA of the Co-P foam was calculated to be 118 cm(2), which was 2.4 times higher than that of a Co-P film (49 cm(2)).-
dc.languageEnglish-
dc.publisherROYAL SOC CHEMISTRY-
dc.subjectHIGH-PERFORMANCE-
dc.subjectACTIVE ELECTROCATALYST-
dc.subjectPHOSPHIDE NANORODS-
dc.subjectCATALYTIC-ACTIVITY-
dc.subjectCARBON NANOTUBES-
dc.subjectNANOWIRE ARRAYS-
dc.subjectNANOPARTICLES-
dc.subjectMOLYBDENUM-
dc.subjectWATER-
dc.subjectGENERATION-
dc.titlePorous Co-P foam as an efficient bifunctional electrocatalyst for hydrogen and oxygen evolution reactions-
dc.typeArticle-
dc.identifier.wosid000390083200008-
dc.identifier.scopusid2-s2.0-84999089956-
dc.type.rimsART-
dc.citation.volume4-
dc.citation.issue47-
dc.citation.beginningpage18272-
dc.citation.endingpage18277-
dc.citation.publicationnameJOURNAL OF MATERIALS CHEMISTRY A-
dc.identifier.doi10.1039/C6TA06761A-
dc.contributor.localauthorCho, Eun Ae-
dc.contributor.localauthorKwon, Hyuk-Sang-
dc.contributor.nonIdAuthorKwon, Yong Kuen-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordPlusHIGH-PERFORMANCE-
dc.subject.keywordPlusACTIVE ELECTROCATALYST-
dc.subject.keywordPlusPHOSPHIDE NANORODS-
dc.subject.keywordPlusCATALYTIC-ACTIVITY-
dc.subject.keywordPlusCARBON NANOTUBES-
dc.subject.keywordPlusNANOWIRE ARRAYS-
dc.subject.keywordPlusNANOPARTICLES-
dc.subject.keywordPlusMOLYBDENUM-
dc.subject.keywordPlusWATER-
dc.subject.keywordPlusGENERATION-
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