https://scholars.lib.ntu.edu.tw/handle/123456789/390950
DC Field | Value | Language |
---|---|---|
dc.contributor.author | CHIH-JUNG CHEN | en_US |
dc.contributor.author | Chen, Po-Tzu | en_US |
dc.contributor.author | Basu, Mrinmoyee | en_US |
dc.contributor.author | Yang, Kai-Chih | en_US |
dc.contributor.author | Lu, Ying-Rui | en_US |
dc.contributor.author | Dong, Chung-Li | en_US |
dc.contributor.author | Ma, Chong-Geng | en_US |
dc.contributor.author | Shen, Chin-Chang | en_US |
dc.contributor.author | Hu, Shu-Fen | en_US |
dc.contributor.author | Liu, Ru-Shi | en_US |
dc.contributor.author | RU-SHI LIU | zz |
dc.creator | RU-SHI LIU | - |
dc.date.accessioned | 2018-09-10T15:19:19Z | - |
dc.date.available | 2018-09-10T15:19:19Z | - |
dc.date.issued | 2015 | - |
dc.identifier.uri | http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000365216000047&KeyUID=WOS:000365216000047 | - |
dc.identifier.uri | http://scholars.lib.ntu.edu.tw/handle/123456789/390950 | - |
dc.description.abstract | An integrated cobalt disulfide (CoS2) co-catalyst passivation layer on Si microwires (MWs) was used as a photocathode for solar hydrogen evolution. Si MWs were prepared by photolithography and dry etching techniques. The CoS2-Si photocathodes were subsequently prepared by chemical deposition and thermal sulfidation of the Co(OH)2 outer shell. The optimized onset potential and photocurrent of the CoS2-Si electrode were 0.248 V and -3.22 mA cm-2 (at 0 V), respectively. The best photocatalytic activity of the CoS2-Si electrode resulted from lower charge transfer resistances among the photoabsorber, co-catalyst, and redox couples in the electrolyte. X-ray absorption near edge structure was conducted to investigate the unoccupied electronic states of the CoS2 layer. We propose that more vacancies in the S-3p unoccupied states of the CoS2-Si electrode were present with a lower negative charge of S22- to form weaker S-H bond strength, promoting water splitting efficiency. Moreover, the CoS2 co-catalyst that completely covered underlying Si MWs served as a passivation layer to prevent oxidation and reduce degradation during photoelectrochemical measurements. Therefore, the optimal CoS2-Si electrode maintained the photocurrent at about -3 mA cm-2 (at 0 V) for 9 h, and its hydrogen generation rate was approximately 0.833 μmol min-1. © 2015 The Royal Society of Chemistry. | - |
dc.language | en | en |
dc.relation.ispartof | Journal of Materials Chemistry A | - |
dc.source | AH | - |
dc.subject.other | Catalysts; Charge transfer; Cobalt; Electrochemistry; Electrodes; Electrolytes; Electronic states; Field emission cathodes; Hydrogen production; Passivation; Photocathodes; Photolithography; Silicon; Solar power generation; X ray absorption; X ray absorption near edge structure spectroscopy; Charge transfer resistance; Dry etching techniques; Hydrogen generations; Photocatalytic activities; Photoelectrochemical hydrogen; Photoelectrochemical measurements; Unoccupied electronic state; X ray absorption near edge structure; Transition metal compounds | - |
dc.subject.other | [SDGs]SDG7 | - |
dc.title | An integrated cobalt disulfide (CoS2) co-catalyst passivation layer on silicon microwires for photoelectrochemical hydrogen evolution | - |
dc.type | journal article | en |
dc.identifier.doi | 10.1039/c5ta06202k | - |
dc.identifier.isi | WOS:000365216000047 | - |
dc.relation.pages | 23466-23476 | - |
dc.relation.journalvolume | 3 | - |
dc.relation.journalissue | 46 | - |
item.fulltext | no fulltext | - |
item.openairetype | journal article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_6501 | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | none | - |
crisitem.author.dept | Program in Nanoengineering and Nanoscience | - |
crisitem.author.dept | Chemistry | - |
crisitem.author.orcid | 0000-0002-3309-7908 | - |
crisitem.author.orcid | 0000-0002-1291-9052 | - |
crisitem.author.parentorg | Graduate School of Advanced Technology | - |
crisitem.author.parentorg | College of Science | - |
Appears in Collections: | 化學系 |
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