DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lim, Sung Yul | ko |
dc.contributor.author | Ha, Kyungyeon | ko |
dc.contributor.author | Ha, Heonhak | ko |
dc.contributor.author | Lee, Soo Youn | ko |
dc.contributor.author | Jang, Min Seok | ko |
dc.contributor.author | Choi, Mansoo | ko |
dc.contributor.author | Chung, Taek Dong | ko |
dc.date.accessioned | 2019-04-15T14:31:32Z | - |
dc.date.available | 2019-04-15T14:31:32Z | - |
dc.date.created | 2019-04-08 | - |
dc.date.created | 2019-04-08 | - |
dc.date.created | 2019-04-08 | - |
dc.date.issued | 2019-01 | - |
dc.identifier.citation | PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.21, no.8, pp.4184 - 4192 | - |
dc.identifier.issn | 1463-9076 | - |
dc.identifier.uri | http://hdl.handle.net/10203/254135 | - |
dc.description.abstract | Platinum is still the most active element for the hydrogen evolution reaction (HER); however, it suffers from its scarcity and high cost. Thus, significant efforts have been dedicated to maximize the catalytic activity with less loading. When Pt is utilized at a semiconductor surface, more factors have to be considered. Placing a catalyst directly in contact with a semiconductor supports the extraction of photogenerated minority carriers as well as boosts the catalytic reactions. In addition, a catalyst should be designed with prudence not to interfere in the light path with respect to absorption at the underlying substrate. Herein, we report the development of planar Si-based photocathodes, covered with a native oxide, for the HER, which also satisfy the prerequisites for the use of a three-dimensionally patterned, flower-like Ag-Pt catalyst. The catalyst consisted of nanoparticles of homogeneously alloyed Ag and Pt, fabricated by a galvanic exchange of Pt with Ag. Importantly, these two elements were proven to have their own functionalities. Ag not only contributed to transporting e(-) and H-ad to the Pt for subsequent processes of the HER but also effectively extracted minority carriers by diluting the high work function of Pt, leading to a better Schottky barrier at the catalyst-insulator-semiconductor junction. Furthermore, computational simulation revealed that the proposed catalyst pattern alleviated optical light loss with the increasing catalyst loading compared to the two-dimensional case. Owing to these effects, we could achieve 0.36 V (vs. reversible hydrogen electrode) as an open circuit potential and the near maximum current density of planar p-type Si. The findings in this work suggests deeper insights that could support the design of catalysts for solar-fuel systems. | - |
dc.language | English | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | Three-dimensionally patterned Ag-Pt alloy catalyst on planar Si photocathodes for photoelectrochemical H-2 evolution | - |
dc.type | Article | - |
dc.identifier.wosid | 000461722500004 | - |
dc.identifier.scopusid | 2-s2.0-85061855821 | - |
dc.type.rims | ART | - |
dc.citation.volume | 21 | - |
dc.citation.issue | 8 | - |
dc.citation.beginningpage | 4184 | - |
dc.citation.endingpage | 4192 | - |
dc.citation.publicationname | PHYSICAL CHEMISTRY CHEMICAL PHYSICS | - |
dc.identifier.doi | 10.1039/c8cp07304j | - |
dc.contributor.localauthor | Jang, Min Seok | - |
dc.contributor.nonIdAuthor | Lim, Sung Yul | - |
dc.contributor.nonIdAuthor | Ha, Kyungyeon | - |
dc.contributor.nonIdAuthor | Lee, Soo Youn | - |
dc.contributor.nonIdAuthor | Choi, Mansoo | - |
dc.contributor.nonIdAuthor | Chung, Taek Dong | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | LIGHT-GUIDED ELECTRODEPOSITION | - |
dc.subject.keywordPlus | HYDROGEN-PRODUCTION | - |
dc.subject.keywordPlus | WORK FUNCTION | - |
dc.subject.keywordPlus | SOLAR | - |
dc.subject.keywordPlus | EFFICIENT | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | LAYER | - |
dc.subject.keywordPlus | TIO2 | - |
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