Full metadata record
DC FieldValueLanguage
dc.contributor.authorChen, Chihjungen_US
dc.contributor.authorYang, Kai-Chihen_US
dc.contributor.authorBasu, Mrinmoyeeen_US
dc.contributor.authorLu, Tzu-Hsiangen_US
dc.contributor.authorLu, Ying-Ruien_US
dc.contributor.authorDong, Chung-Lien_US
dc.contributor.authorHu, Shu-Fenen_US
dc.contributor.authorLiu, Ru-Shien_US
dc.date.accessioned2017-04-21T06:56:46Z-
dc.date.available2017-04-21T06:56:46Z-
dc.date.issued2016-03-02en_US
dc.identifier.issn1944-8244en_US
dc.identifier.urihttp://dx.doi.org/10.1021/acsami.6b00027en_US
dc.identifier.urihttp://hdl.handle.net/11536/133486-
dc.description.abstractThis study employed silicon@cobalt dichalcogenide micro wires (MWs) as wide range pH-tolerable photocathode material for solar water splitting. Silicon microwire arrays were fabricated through lithography and dry etching technologies. Si@Co(OH)(2) MWs were utilized as precursors to synthesize Si@CoX2 (X = S or Se) photocathodes. Si@CoS2 and Si@CoSe2 MWs were subsequently prepared by thermal sulfidation and hydrothermal selenization reaction of Si@Co(OH)(2), respectively. The CoX2 outer shell served as cocatalyst to accelerate the kinetics of photogenerated electrons from the underlying Si MWs and reduce the recombination. Moreover, the CoX2 layer completely deposited on the Si surface functioned as a passivation layer by decreasing the oxide formation on Si MWs during solar hydrogen evolution. Si@CoS2 photocathode showed a photocurrent density of -3.22 mA cm(-2) at 0 V (vs RHE) in 0.5 M sulfuric acid electrolyte, and Si@CoSe2 MWs revealed moderate photocurrent density of -2.55 mA cm(-2). However, Si@CoSe2 presented high charge transfer efficiency in neutral and alkaline electrolytes. Continuous chronoamperometry in acid, neutral, and alkaline solutions was conducted at 0 V (vs RHE) to evaluate the photoelectrochemical durability of Si@CoX2 MWs. Si@CoS2 electrode showed no photoresponse after the chronoamperometry test because it was etched through the electrolyte. By contrast, the photocurrent density of Si@CoSe2 MWs gradually increased to -5 mA cm(-2) after chronoamperometry characterization owing to the amorphous structure generation.en_US
dc.language.isoen_USen_US
dc.subjectcobalt dichalcogenideen_US
dc.subjectsilicon microwire arraysen_US
dc.subjectwide range pH tolerationen_US
dc.subjecthydrogen evolutionen_US
dc.subjectsolar water splittingen_US
dc.subjectco-catalysten_US
dc.titleWide Range pH-Tolerable Silicon@Pyrite Cobalt Dichalcogenide Microwire Array Photoelectrodes for Solar Hydrogen Evolutionen_US
dc.identifier.doi10.1021/acsami.6b00027en_US
dc.identifier.journalACS APPLIED MATERIALS & INTERFACESen_US
dc.citation.volume8en_US
dc.citation.issue8en_US
dc.citation.spage5400en_US
dc.citation.epage5407en_US
dc.contributor.department加速器光源科技與應用學位學程zh_TW
dc.contributor.departmentMaster and Ph.D. Program for Science and Technology of Accelrrator Light Sourceen_US
dc.identifier.wosnumberWOS:000371453600040en_US
Appears in Collections:Articles