Reduced Graphene Oxide Supported Cobalt-Calcium Phosphate Composite for Electrochemical Water Oxidation
DC Field | Value | Language |
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dc.contributor.author | Lee, Keunyoung | - |
dc.contributor.author | Yang, Wonseok | - |
dc.contributor.author | Pyo, Eunji | - |
dc.contributor.author | Choi, Hyebin | - |
dc.contributor.author | Cha, Yeona | - |
dc.contributor.author | Lee, Seonhong | - |
dc.contributor.author | Kim, Chung Soo | - |
dc.contributor.author | Lim, Dong-Kwon | - |
dc.contributor.author | Kwon, Ki-Young | - |
dc.date.accessioned | 2022-02-26T13:41:12Z | - |
dc.date.available | 2022-02-26T13:41:12Z | - |
dc.date.created | 2022-02-07 | - |
dc.date.issued | 2021-08 | - |
dc.identifier.issn | 2073-4344 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/137019 | - |
dc.description.abstract | We report the oxygen evolution reaction (OER) catalyst composed of cobalt-calcium phosphate on reduced graphene oxide (CoCaP/rGO). Our catalyst is prepared by the anodic electrolysis of calcium phosphate/rGO mixture loaded on indium-tin-oxide (ITO) in Co2+ aqueous solution. TEM, XPS and XRD experiments confirm that the crystal phase of calcium phosphate (CaP) is transferred into an amorphous phase of calcium oxide with phosphate (5.06 at%) after anodic electrolysis. Additionally, the main cation component of calcium is replaced by cobalt ion. The current-voltage characteristics of CoCaP/rGO showed a shoulder peak at 1.10 V vs. NHE, which originated from Co2+ to higher oxidation states (Co3+ or Co4+) and a strong wave from water oxidation higher +1.16 V vs. NHE at neutral condition (pH 7). CoCaP and CoCaP/rGO showed 4.8 and 10 mA/cm(2) at 0.47 V of overpotential, respectively. The enhanced OER catalytic activity of CoCaP/rGO arises from the synergetic interaction between the amorphous phase of CoCaP and electric conducting graphene sheets. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | MDPI | - |
dc.subject | OXYGEN EVOLUTION REACTION | - |
dc.subject | BI-FUNCTIONAL ELECTROCATALYST | - |
dc.subject | BIFUNCTIONAL ELECTROCATALYSTS | - |
dc.subject | EVOLVING CATALYST | - |
dc.subject | THIN-FILMS | - |
dc.subject | EFFICIENT | - |
dc.subject | REDUCTION | - |
dc.subject | HYDROGEN | - |
dc.subject | NANOPARTICLES | - |
dc.subject | PERFORMANCE | - |
dc.title | Reduced Graphene Oxide Supported Cobalt-Calcium Phosphate Composite for Electrochemical Water Oxidation | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lim, Dong-Kwon | - |
dc.identifier.doi | 10.3390/catal11080960 | - |
dc.identifier.scopusid | 2-s2.0-85112371971 | - |
dc.identifier.wosid | 000688907300001 | - |
dc.identifier.bibliographicCitation | CATALYSTS, v.11, no.8 | - |
dc.relation.isPartOf | CATALYSTS | - |
dc.citation.title | CATALYSTS | - |
dc.citation.volume | 11 | - |
dc.citation.number | 8 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.subject.keywordPlus | BI-FUNCTIONAL ELECTROCATALYST | - |
dc.subject.keywordPlus | BIFUNCTIONAL ELECTROCATALYSTS | - |
dc.subject.keywordPlus | EFFICIENT | - |
dc.subject.keywordPlus | EVOLVING CATALYST | - |
dc.subject.keywordPlus | HYDROGEN | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordPlus | OXYGEN EVOLUTION REACTION | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | REDUCTION | - |
dc.subject.keywordPlus | THIN-FILMS | - |
dc.subject.keywordAuthor | OER | - |
dc.subject.keywordAuthor | calcium phosphate | - |
dc.subject.keywordAuthor | graphene | - |
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