DC Field | Value | Language |
---|---|---|
dc.contributor.author | Choi, S.K. | - |
dc.contributor.author | Piao, G. | - |
dc.contributor.author | Choi, W. | - |
dc.contributor.author | Park, H. | - |
dc.date.accessioned | 2018-06-15T05:43:09Z | - |
dc.date.available | 2018-06-15T05:43:09Z | - |
dc.date.created | 2017-12-21 | - |
dc.date.issued | 2017-11 | - |
dc.identifier.issn | 0926-3373 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/50769 | - |
dc.description.abstract | Highly efficient photoelectrochemical (PEC) hydrogen production is achieved using p-Si wire arrays loaded with NiMoZn particles in aqueous sulfuric acid under simulated sunlight (AM 1.5 G; 100 mW cm−2). Vertically-aligned wire arrays are grown on planar Si wafers via a quick electroless etching process within 5 min, leading to short Si wires of ∼4 μm and diameters of ∼0.2 μm. Despite the short length of the wires, the reflectance of the arrays is < 5% over the wavelength range of 400–800 nm (the reflectance of planar Si is ∼40%) and the photocurrent density (Iph) is enhanced by ∼ 30% relative to planar Si. To further improve the PEC performance, ∼ 100 nm NiMoZn particles are photoelectrochemically deposited onto the wires. The wire arrays with evenly distributed NiMoZn particles show a photocurrent onset potential (Eon) of ∼ + 0.27 V vs. RHE and produce an Iph of ∼1.45 mA cm−2 at 0 V vs. RHE with a Faradaic efficiency of ∼ 100% for H2 evolution. This Iph value is ∼10-fold greater than that with the planar Si/NiMoZn samples. The excellent performance of the wire arrays and NiMoZn heterojunction is attributed to enhanced light absorption (decreased reflectance), facilitated charge transfer (radial-directional electron transfer), and NiMoZn-catalyzed hydrogen production. | - |
dc.language | English | - |
dc.publisher | Elsevier B.V. | - |
dc.relation.isPartOf | Applied Catalysis B: Environmental | - |
dc.subject | Electrocatalysts | - |
dc.subject | Field emission cathodes | - |
dc.subject | Heterojunctions | - |
dc.subject | Hydrogen production | - |
dc.subject | Molybdenum alloys | - |
dc.subject | Morphology | - |
dc.subject | Nickel alloys | - |
dc.subject | Photoelectrochemical cells | - |
dc.subject | Reflection | - |
dc.subject | Silicon | - |
dc.subject | Silicon alloys | - |
dc.subject | Silicon wafers | - |
dc.subject | Ternary alloys | - |
dc.subject | Wire | - |
dc.subject | Artificial photosynthesis | - |
dc.subject | Directional electrons | - |
dc.subject | Enhanced light absorptions | - |
dc.subject | Faradaic efficiencies | - |
dc.subject | Photocurrent density | - |
dc.subject | Photoelectrochemicals | - |
dc.subject | Solar fuels | - |
dc.subject | Water splitting | - |
dc.subject | Zinc alloys | - |
dc.title | Highly efficient hydrogen production using p-Si wire arrays and NiMoZn heterojunction photocathodes | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.apcatb.2017.06.020 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | Applied Catalysis B: Environmental, v.217, pp.615 - 621 | - |
dc.identifier.wosid | 000405158000060 | - |
dc.date.tcdate | 2019-02-01 | - |
dc.citation.endPage | 621 | - |
dc.citation.startPage | 615 | - |
dc.citation.title | Applied Catalysis B: Environmental | - |
dc.citation.volume | 217 | - |
dc.contributor.affiliatedAuthor | Choi, W. | - |
dc.identifier.scopusid | 2-s2.0-85021098761 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 2 | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | PHOTOELECTROCHEMICAL WATER OXIDATION | - |
dc.subject.keywordPlus | EVOLUTION REACTION | - |
dc.subject.keywordPlus | CATALYSTS | - |
dc.subject.keywordPlus | BIVO4 | - |
dc.subject.keywordPlus | ELECTROCATALYST | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | NI | - |
dc.subject.keywordPlus | PHOSPHIDE | - |
dc.subject.keywordPlus | NANORODS | - |
dc.subject.keywordPlus | FORMATE | - |
dc.subject.keywordAuthor | Artificial photosynthesis | - |
dc.subject.keywordAuthor | Solar fuel | - |
dc.subject.keywordAuthor | Electrocatalyst | - |
dc.subject.keywordAuthor | Water splitting | - |
dc.subject.keywordAuthor | Morphology | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Engineering | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
library@postech.ac.kr Tel: 054-279-2548
Copyrights © by 2017 Pohang University of Science ad Technology All right reserved.