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Amorphous Phosphorus-Doped Cobalt Sulfide Modified on Silicon Pyramids for Efficient Solar Water Reduction
Chen, Chih-Jung1; Liu, Chi-Wei2,3; Yang, Kai-Chih4; Yin, Li-Chang5; Wei, Da-Hua2,3; Hu, Shu-Fen4; Liu, Ru-Shi1,2,3
Corresponding AuthorWei, Da-Hua(dhwei@ntut.edu.tw) ; Hu, Shu-Fen(sfhu.hu@ntnu.edu.tw) ; Liu, Ru-Shi(rsliu@ntu.edu.tw)
2018-10-31
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume10Issue:43Pages:37142-37149
AbstractCobalt sulfide (CoSx) functioned as a co-catalyst to accelerate the kinetics of photogenerated electrons on Si photocathode, leading to the enhancement of solar hydrogen evolution efficiency. By doping phosphorus heteroatoms, CoSx materials showed an improved catalytic activity because of superior surface area and quantity of active sites. Furthermore, increased vacancies in unoccupied electronic states were observed, as more phosphorus atoms doped into CoSx co-catalysts. Although these vacant sites improved the capability to accept photoinduced electrons from Si photoabsorber, chemisorption energy of atomic hydrogen on catalysts was the dominant factor affecting in photoelectrochemical performance. We suggested that P-doped CoSx with appropriate doping quantities showed thermoneutral hydrogen adsorption. Excess phosphorus dopants in CoSx contributed to excessively strong adsorption with H atoms, causing the poor desorption ability of photocatalytic reaction. The optimal P-doped CoSx decoratedSi photocathode showed a photocurrent of -20.6 mA cm(-2) at 0 V. Moreover, a TiO2 thin film was deposited on the Si photocathode as a passivation layer for improving the durability. The current density of 10 nm TiO2-modified photocathode remained at approximately -13.3 mA cm(-2) after 1 h of chronoamperometry.
Keywordwater reduction hydrogen evolution reaction co-catalyst P-doped cobalt sulfide Si pyramids
Funding OrganizationMinistry of Science and Technology ; National Science Foundation of China ; NSFC-GD joint special fund for supercomputer science
DOI10.1021/acsami.8b14571
Indexed BySCI
Language英语
Funding ProjectMinistry of Science and Technology[MOST 106-2112-M-003-007-MY3] ; Ministry of Science and Technology[MOST 107-2113-M-002-008-MY3] ; National Science Foundation of China[52472249] ; NSFC-GD joint special fund for supercomputer science
WOS Research AreaScience & Technology - Other Topics ; Materials Science
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000449239600062
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/130426
Collection中国科学院金属研究所
Corresponding AuthorWei, Da-Hua; Hu, Shu-Fen; Liu, Ru-Shi
Affiliation1.Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan
2.Natl Taipei Univ Technol, Dept Mech Engn, Taipei 10608, Taiwan
3.Natl Taipei Univ Technol, Grad Inst Mfg Technol, Taipei 10608, Taiwan
4.Natl Taiwan Normal Univ, Dept Phys, Taipei 11677, Taiwan
5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Chen, Chih-Jung,Liu, Chi-Wei,Yang, Kai-Chih,et al. Amorphous Phosphorus-Doped Cobalt Sulfide Modified on Silicon Pyramids for Efficient Solar Water Reduction[J]. ACS APPLIED MATERIALS & INTERFACES,2018,10(43):37142-37149.
APA Chen, Chih-Jung.,Liu, Chi-Wei.,Yang, Kai-Chih.,Yin, Li-Chang.,Wei, Da-Hua.,...&Liu, Ru-Shi.(2018).Amorphous Phosphorus-Doped Cobalt Sulfide Modified on Silicon Pyramids for Efficient Solar Water Reduction.ACS APPLIED MATERIALS & INTERFACES,10(43),37142-37149.
MLA Chen, Chih-Jung,et al."Amorphous Phosphorus-Doped Cobalt Sulfide Modified on Silicon Pyramids for Efficient Solar Water Reduction".ACS APPLIED MATERIALS & INTERFACES 10.43(2018):37142-37149.
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