DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jeong, HW | - |
dc.contributor.author | Jeon, TH | - |
dc.contributor.author | Jang, JS | - |
dc.contributor.author | Choi, W | - |
dc.contributor.author | Park, H | - |
dc.date.accessioned | 2016-03-31T08:24:43Z | - |
dc.date.available | 2016-03-31T08:24:43Z | - |
dc.date.created | 2013-12-04 | - |
dc.date.issued | 2013-05-09 | - |
dc.identifier.issn | 1932-7447 | - |
dc.identifier.other | 2013-OAK-0000028354 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/15245 | - |
dc.description.abstract | To improve the photoelectrochemical (PEC) performance of BiVO4, three different modifications (doping, heterojunction, and catalyst deposition) using earth-abundant elements are performed and their effects are compared in a 0.1 M phosphate electrolyte at pH 7 under AM1.5 light (100 mW/cm(2)). When a hexavalent element (Cr6+, W6+, or Mo6+) is doped at various levels, the Mo6+-doping effect is most significant at 10 atomic % with about two times higher photocurrent generation at the oxygen evolution potential (1.23 V-RHE). Such enhancement is attributed to a decrease in charge transfer resistance (R-ct) by donor doping, resulting in an approximate 2-fold increase in charge separation efficiency (eta(sep)) to about 25%. W6+ is less effective than Mo6+, whereas Cr6+ has a detrimental effect. To further improve the charge separation efficiency of Mo6+-doped BiVO4 (Mo-BiVO4), a approximate 600 nm thick WO3 layer is deposited under a similarly thick Mo-BiVO4 layer. This binary heterojunction (WO3/Mo-BiVO4) exhibits eta(sep) of about 50% along with more than 3 times higher photocurrent generation. On the other hand, an oxygen evolving cobalt-phosphate (Co-Pi) catalyst electrodeposited to Mo-BiVO4 (Mo-BiVO4/Co-Pi) enhances charge injection efficiency (eta(inj)) from similar to 50 to similar to 70% at 1.23 V-RHE. These two binaries are coupled into a ternary heterojunction (WO3/Mo-BiVO4/Co-Pi) in order to improve the charge transfer efficiencies (eta(sep) and eta(inj)). The PEC performance of this ternary is significantly high with photocurrent density of about 2.4 mA/cm(2) at 1.23 V-RHE (corresponding to the solar-to-hydrogen efficiency of ca. 3%) due to eta(sep) and eta(inj) of similar to 60 and 90%, respectively. | - |
dc.description.statementofresponsibility | X | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.relation.isPartOf | JOURNAL OF PHYSICAL CHEMISTRY C | - |
dc.subject | SCANNING ELECTROCHEMICAL MICROSCOPY | - |
dc.subject | VISIBLE-LIGHT IRRADIATION | - |
dc.subject | PHOTOCATALYTIC ACTIVITY | - |
dc.subject | PHOTOANODES | - |
dc.subject | CATALYST | - |
dc.subject | TIO2 | - |
dc.subject | NANOFIBERS | - |
dc.subject | ELECTRODES | - |
dc.subject | FILMS | - |
dc.subject | MO | - |
dc.title | Strategic Modification of BiVO4 for Improving Photoelectrochemical Water Oxidation Performance | - |
dc.type | Article | - |
dc.contributor.college | 환경공학부 | - |
dc.identifier.doi | 10.1021/JP400415M | - |
dc.author.google | Jeong, HW | - |
dc.author.google | Jeon, TH | - |
dc.author.google | Jang, JS | - |
dc.author.google | Choi, W | - |
dc.author.google | Park, H | - |
dc.relation.volume | 117 | - |
dc.relation.issue | 18 | - |
dc.relation.startpage | 9104 | - |
dc.relation.lastpage | 9112 | - |
dc.contributor.id | 10105056 | - |
dc.relation.journal | JOURNAL OF PHYSICAL CHEMISTRY C | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Journal Papers | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | JOURNAL OF PHYSICAL CHEMISTRY C, v.117, no.18, pp.9104 - 9112 | - |
dc.identifier.wosid | 000318892000007 | - |
dc.date.tcdate | 2019-01-01 | - |
dc.citation.endPage | 9112 | - |
dc.citation.number | 18 | - |
dc.citation.startPage | 9104 | - |
dc.citation.title | JOURNAL OF PHYSICAL CHEMISTRY C | - |
dc.citation.volume | 117 | - |
dc.contributor.affiliatedAuthor | Choi, W | - |
dc.identifier.scopusid | 2-s2.0-84877692391 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 105 | - |
dc.description.scptc | 97 | * |
dc.date.scptcdate | 2018-05-121 | * |
dc.type.docType | Article | - |
dc.subject.keywordPlus | SCANNING ELECTROCHEMICAL MICROSCOPY | - |
dc.subject.keywordPlus | COBALT-PHOSPHATE | - |
dc.subject.keywordPlus | PHOTOCATALYTIC ACTIVITY | - |
dc.subject.keywordPlus | CATALYST | - |
dc.subject.keywordPlus | PHOTOANODES | - |
dc.subject.keywordPlus | NANOFIBERS | - |
dc.subject.keywordPlus | FILMS | - |
dc.subject.keywordPlus | TIO2 | - |
dc.subject.keywordPlus | MO | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
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