Boosting hydrogen and methane formation on a high-entropy photocatalyst by integrating atomic d0/d10 electronic junctions and microscopic P/N heterojunctions
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arXiv
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| Natura: | Preprint |
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2025
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| _version_ | 1866909720483201024 |
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| author | Hai, Ho Truong Nam Hidalgo-Jiménez, Jacqueline Edalati, Kaveh |
| author_facet | Hai, Ho Truong Nam Hidalgo-Jiménez, Jacqueline Edalati, Kaveh |
| contents | The formation of green energy carriers such as hydrogen (H2) and methane (CH4) via photocatalytic processes provides a clean method for addressing environmental and energy issues. To achieve highly efficient photocatalysts for H2 and CH4 generation, the present work introduces the P/N heterojunctions in a high-entropy oxide (HEO) with d0/d10 electronic junctions. The study uses CuO as a P-type semiconductor and the HEO containing d0 (Ti, Zr, Nb, Ta) and d10 (Zn) cations as an N-type semiconductor. The material exhibits improvements in optical properties, such as light absorption, charge mobility and reduced electron-hole recombination. The integration of two concepts, atomic-scale d0/d10 electronic junctions and micro-scale P/N heterojunctions, leads to enhanced H2 and CH4 production. Particularly after the partial removal of vacancies in the heterojunction, H2 production from photocatalytic water splitting reaches 0.71 mmol/g.h, and CH4 evolution from CO2 conversion reaches 2.40 umol/g.h with 72% selectivity for methanation. The integrated strategy of this study has a high potential in developing active heterostructured catalysts for clean fuel production. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_01963 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Boosting hydrogen and methane formation on a high-entropy photocatalyst by integrating atomic d0/d10 electronic junctions and microscopic P/N heterojunctions Hai, Ho Truong Nam Hidalgo-Jiménez, Jacqueline Edalati, Kaveh Chemical Physics Materials Science The formation of green energy carriers such as hydrogen (H2) and methane (CH4) via photocatalytic processes provides a clean method for addressing environmental and energy issues. To achieve highly efficient photocatalysts for H2 and CH4 generation, the present work introduces the P/N heterojunctions in a high-entropy oxide (HEO) with d0/d10 electronic junctions. The study uses CuO as a P-type semiconductor and the HEO containing d0 (Ti, Zr, Nb, Ta) and d10 (Zn) cations as an N-type semiconductor. The material exhibits improvements in optical properties, such as light absorption, charge mobility and reduced electron-hole recombination. The integration of two concepts, atomic-scale d0/d10 electronic junctions and micro-scale P/N heterojunctions, leads to enhanced H2 and CH4 production. Particularly after the partial removal of vacancies in the heterojunction, H2 production from photocatalytic water splitting reaches 0.71 mmol/g.h, and CH4 evolution from CO2 conversion reaches 2.40 umol/g.h with 72% selectivity for methanation. The integrated strategy of this study has a high potential in developing active heterostructured catalysts for clean fuel production. |
| title | Boosting hydrogen and methane formation on a high-entropy photocatalyst by integrating atomic d0/d10 electronic junctions and microscopic P/N heterojunctions |
| topic | Chemical Physics Materials Science |
| url | https://arxiv.org/abs/2508.01963 |