Noble Metal Modification of CdS-Covered CuInS<sub>2</sub> Electrodes for Improved Photoelectrochemical Activity and Stability
In this paper, efficient and stable photoelectrochemical (PEC) hydrogen (H<sub>2</sub>) evolution using copper indium sulfide (CuInS<sub>2</sub>) thin film electrodes was studied. Modification with a cadmium sulfide (CdS) layer led to improved charge separation at the interfa...
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MDPI AG
2020-08-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/10/9/949 |
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| author | Toshihiro Takashima Yukitaka Fujishiro Hiroshi Irie |
| author_facet | Toshihiro Takashima Yukitaka Fujishiro Hiroshi Irie |
| author_sort | Toshihiro Takashima |
| collection | DOAJ |
| description | In this paper, efficient and stable photoelectrochemical (PEC) hydrogen (H<sub>2</sub>) evolution using copper indium sulfide (CuInS<sub>2</sub>) thin film electrodes was studied. Modification with a cadmium sulfide (CdS) layer led to improved charge separation at the interface between CuInS<sub>2</sub> and CdS; however, the photocorrosive nature of CdS induced poor stability of the photocathode. Further surface coating with an electrodeposited Pt layer over the CdS-covered CuInS<sub>2</sub> photocathode prevented the CdS layer from making contact with the electrolyte solution, and enabled efficient PEC H<sub>2</sub> evolution without appreciable degradation. This indicates that the Pt layer functioned not only as a reaction site for H<sub>2</sub> evolution, but also as a protection layer. In addition, it was found that surface protection using a noble metal layer was also effective for stable PEC carbon dioxide (CO<sub>2</sub>) reduction when appropriate noble metal cocatalysts were selected. When Au or Ag was used, carbon monoxide was obtained as a product of PEC CO<sub>2</sub> reduction. |
| first_indexed | 2024-03-10T17:08:53Z |
| format | Article |
| id | doaj.art-8307c8b3fba84f739ad7a18ad92acd8b |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T17:08:53Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-8307c8b3fba84f739ad7a18ad92acd8b2023-11-20T10:42:50ZengMDPI AGCatalysts2073-43442020-08-0110994910.3390/catal10090949Noble Metal Modification of CdS-Covered CuInS<sub>2</sub> Electrodes for Improved Photoelectrochemical Activity and StabilityToshihiro Takashima0Yukitaka Fujishiro1Hiroshi Irie2Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, JapanIntegrated Graduate School of Medicine, Engineering, and Agricultural Sciences, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, JapanClean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, JapanIn this paper, efficient and stable photoelectrochemical (PEC) hydrogen (H<sub>2</sub>) evolution using copper indium sulfide (CuInS<sub>2</sub>) thin film electrodes was studied. Modification with a cadmium sulfide (CdS) layer led to improved charge separation at the interface between CuInS<sub>2</sub> and CdS; however, the photocorrosive nature of CdS induced poor stability of the photocathode. Further surface coating with an electrodeposited Pt layer over the CdS-covered CuInS<sub>2</sub> photocathode prevented the CdS layer from making contact with the electrolyte solution, and enabled efficient PEC H<sub>2</sub> evolution without appreciable degradation. This indicates that the Pt layer functioned not only as a reaction site for H<sub>2</sub> evolution, but also as a protection layer. In addition, it was found that surface protection using a noble metal layer was also effective for stable PEC carbon dioxide (CO<sub>2</sub>) reduction when appropriate noble metal cocatalysts were selected. When Au or Ag was used, carbon monoxide was obtained as a product of PEC CO<sub>2</sub> reduction.https://www.mdpi.com/2073-4344/10/9/949photoelectrochemistrywater splittinghydrogenphotocathodecarbon dioxide |
| spellingShingle | Toshihiro Takashima Yukitaka Fujishiro Hiroshi Irie Noble Metal Modification of CdS-Covered CuInS<sub>2</sub> Electrodes for Improved Photoelectrochemical Activity and Stability Catalysts photoelectrochemistry water splitting hydrogen photocathode carbon dioxide |
| title | Noble Metal Modification of CdS-Covered CuInS<sub>2</sub> Electrodes for Improved Photoelectrochemical Activity and Stability |
| title_full | Noble Metal Modification of CdS-Covered CuInS<sub>2</sub> Electrodes for Improved Photoelectrochemical Activity and Stability |
| title_fullStr | Noble Metal Modification of CdS-Covered CuInS<sub>2</sub> Electrodes for Improved Photoelectrochemical Activity and Stability |
| title_full_unstemmed | Noble Metal Modification of CdS-Covered CuInS<sub>2</sub> Electrodes for Improved Photoelectrochemical Activity and Stability |
| title_short | Noble Metal Modification of CdS-Covered CuInS<sub>2</sub> Electrodes for Improved Photoelectrochemical Activity and Stability |
| title_sort | noble metal modification of cds covered cuins sub 2 sub electrodes for improved photoelectrochemical activity and stability |
| topic | photoelectrochemistry water splitting hydrogen photocathode carbon dioxide |
| url | https://www.mdpi.com/2073-4344/10/9/949 |
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