Amorphous Phosphorus-Doped Cobalt Sulfide Modified on Silicon Pyramids for Efficient Solar Water Reduction
文献类型：期刊论文
| 作者 | Chen, CJ; Liu, CW; Yang, KC; Yin, LC; Wei, DH; Hu, SF; Liu, RS |
| 刊名 | ACS APPLIED MATERIALS & INTERFACES
 |
| 出版日期 | 2018-10-31 |
| 卷号 | 10期号:43页码:37142-37149 |
| 关键词 | water reduction hydrogen evolution reaction co-catalyst P-doped cobalt sulfide Si pyramids |
| ISSN号 | 1944-8244 |
| DOI | 10.1021/acsami.8b14571 |
| 英文摘要 | 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. |
| 学科主题 | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000449239600062 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79880]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.[Chen, Chih-Jung 2.Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan 3.[Liu, Chi-Wei 4.Wei, Da-Hua 5.Natl Taipei Univ Technol, Dept Mech Engn, Taipei 10608, Taiwan 6.[Liu, Chi-Wei 7.Wei, Da-Hua 8.Natl Taipei Univ Technol, Grad Inst Mfg Technol, Taipei 10608, Taiwan 9.[Yang, Kai-Chih 10.Natl Taiwan Normal Univ, Dept Phys, Taipei 11677, Taiwan |
| 推荐引用方式 GB/T 7714 | Chen, CJ,Liu, CW,Yang, KC,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, CJ.,Liu, CW.,Yang, KC.,Yin, LC.,Wei, DH.,...&Liu, RS.(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, CJ,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. |
入库方式： OAI收割
来源：金属研究所
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