Enhancing photoelectrochemical CO2 reduction with silicon photonic crystals
The effectiveness of silicon (Si) and silicon-based materials in catalyzing photoelectrochemistry (PEC) CO2 reduction is limited by poor visible light absorption. In this study, we prepared two-dimensional (2D) silicon-based photonic crystals (SiPCs) with circular dielectric pillars arranged in a sq...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-12-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2023.1326349/full |
| _version_ | 1797385949638819840 |
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| author | Chu Zhou Chu Zhou Gaotian Zhang Peiyuan Guo Chenxi Ye Zhenjun Chen Ziyi Ma Menglong Zhang Menglong Zhang Jingbo Li |
| author_facet | Chu Zhou Chu Zhou Gaotian Zhang Peiyuan Guo Chenxi Ye Zhenjun Chen Ziyi Ma Menglong Zhang Menglong Zhang Jingbo Li |
| author_sort | Chu Zhou |
| collection | DOAJ |
| description | The effectiveness of silicon (Si) and silicon-based materials in catalyzing photoelectrochemistry (PEC) CO2 reduction is limited by poor visible light absorption. In this study, we prepared two-dimensional (2D) silicon-based photonic crystals (SiPCs) with circular dielectric pillars arranged in a square array to amplify the absorption of light within the wavelength of approximately 450 nm. By investigating five sets of n + p SiPCs with varying dielectric pillar sizes and periodicity while maintaining consistent filling ratios, our findings showed improved photocurrent densities and a notable shift in product selectivity towards CH4 (around 25% Faradaic Efficiency). Additionally, we integrated platinum nanoparticles, which further enhanced the photocurrent without impacting the enhanced light absorption effect of SiPCs. These results not only validate the crucial role of SiPCs in enhancing light absorption and improving PEC performance but also suggest a promising approach towards efficient and selective PEC CO2 reduction. |
| first_indexed | 2024-03-08T22:02:52Z |
| format | Article |
| id | doaj.art-0a085ba29aef4134b8a98cc347e2ff37 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-03-08T22:02:52Z |
| publishDate | 2023-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-0a085ba29aef4134b8a98cc347e2ff372023-12-19T10:54:04ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462023-12-011110.3389/fchem.2023.13263491326349Enhancing photoelectrochemical CO2 reduction with silicon photonic crystalsChu Zhou0Chu Zhou1Gaotian Zhang2Peiyuan Guo3Chenxi Ye4Zhenjun Chen5Ziyi Ma6Menglong Zhang7Menglong Zhang8Jingbo Li9School of Engineering, University of Warwick, Coventry, United KingdomZhejiang Xinke Semiconductor Co., Ltd., Hangzhou, Zhejiang, ChinaSchool of Semiconductor Science and Technology, South China Normal University, Foshan, Guangdong, ChinaSchool of Semiconductor Science and Technology, South China Normal University, Foshan, Guangdong, ChinaSchool of Semiconductor Science and Technology, South China Normal University, Foshan, Guangdong, ChinaSchool of Semiconductor Science and Technology, South China Normal University, Foshan, Guangdong, ChinaSchool of Semiconductor Science and Technology, South China Normal University, Foshan, Guangdong, ChinaZhejiang Xinke Semiconductor Co., Ltd., Hangzhou, Zhejiang, ChinaSchool of Semiconductor Science and Technology, South China Normal University, Foshan, Guangdong, ChinaCollege of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, ChinaThe effectiveness of silicon (Si) and silicon-based materials in catalyzing photoelectrochemistry (PEC) CO2 reduction is limited by poor visible light absorption. In this study, we prepared two-dimensional (2D) silicon-based photonic crystals (SiPCs) with circular dielectric pillars arranged in a square array to amplify the absorption of light within the wavelength of approximately 450 nm. By investigating five sets of n + p SiPCs with varying dielectric pillar sizes and periodicity while maintaining consistent filling ratios, our findings showed improved photocurrent densities and a notable shift in product selectivity towards CH4 (around 25% Faradaic Efficiency). Additionally, we integrated platinum nanoparticles, which further enhanced the photocurrent without impacting the enhanced light absorption effect of SiPCs. These results not only validate the crucial role of SiPCs in enhancing light absorption and improving PEC performance but also suggest a promising approach towards efficient and selective PEC CO2 reduction.https://www.frontiersin.org/articles/10.3389/fchem.2023.1326349/fullSi photonic crystalphotocatalystphotoelectrochemistryphotocathodeCO2 reduction |
| spellingShingle | Chu Zhou Chu Zhou Gaotian Zhang Peiyuan Guo Chenxi Ye Zhenjun Chen Ziyi Ma Menglong Zhang Menglong Zhang Jingbo Li Enhancing photoelectrochemical CO2 reduction with silicon photonic crystals Frontiers in Chemistry Si photonic crystal photocatalyst photoelectrochemistry photocathode CO2 reduction |
| title | Enhancing photoelectrochemical CO2 reduction with silicon photonic crystals |
| title_full | Enhancing photoelectrochemical CO2 reduction with silicon photonic crystals |
| title_fullStr | Enhancing photoelectrochemical CO2 reduction with silicon photonic crystals |
| title_full_unstemmed | Enhancing photoelectrochemical CO2 reduction with silicon photonic crystals |
| title_short | Enhancing photoelectrochemical CO2 reduction with silicon photonic crystals |
| title_sort | enhancing photoelectrochemical co2 reduction with silicon photonic crystals |
| topic | Si photonic crystal photocatalyst photoelectrochemistry photocathode CO2 reduction |
| url | https://www.frontiersin.org/articles/10.3389/fchem.2023.1326349/full |
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