| 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 Author | Wei, 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 Publication | ACS APPLIED MATERIALS & INTERFACES
 |
| ISSN | 1944-8244 |
| Volume | 10Issue:43Pages:37142-37149 |
| Abstract | Cobalt 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. |
| Keyword | water reduction hydrogen evolution reaction co-catalyst P-doped cobalt sulfide Si pyramids |
| Funding Organization | Ministry of Science and Technology ; National Science Foundation of China ; NSFC-GD joint special fund for supercomputer science |
| DOI | 10.1021/acsami.8b14571 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Ministry 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 Area | Science & Technology - Other Topics ; Materials Science |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000449239600062 |
| Publisher | AMER CHEMICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/130426 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wei, Da-Hua; Hu, Shu-Fen; Liu, Ru-Shi |
| Affiliation | 1.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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