Electrons and Hydroxyl Radicals Synergistically Boost the Catalytic Hydrogen Evolution from Ammonia Borane over Single Nickel Phosphides under Visible Light Irradiation
Abstract From the perspective of tailoring the reaction pathways of photogenerated charge carriers and intermediates to remarkably enhance the solar‐to‐hydrogen energy conversion efficiency, we synthesized the three low‐cost semiconducting nickel phosphides Ni2P, Ni12P5 and Ni3P, which singly cataly...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2020-03-01
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| Series: | ChemistryOpen |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/open.201900335 |
| _version_ | 1819052573401808896 |
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| author | Jin Song Prof. Xiaojun Gu Hao Zhang |
| author_facet | Jin Song Prof. Xiaojun Gu Hao Zhang |
| author_sort | Jin Song |
| collection | DOAJ |
| description | Abstract From the perspective of tailoring the reaction pathways of photogenerated charge carriers and intermediates to remarkably enhance the solar‐to‐hydrogen energy conversion efficiency, we synthesized the three low‐cost semiconducting nickel phosphides Ni2P, Ni12P5 and Ni3P, which singly catalyzed the hydrogen evolution from ammonia borane (NH3BH3) in the alkaline aqueous solution under visible light irradiation at 298 K. The systematic investigations showed that all the catalysts had higher activities under visible light irradiation than in the dark and Ni2P had the highest photocatalytic activity with the initial turnover frequency (TOF) value of 82.7 min−1, which exceeded the values of reported metal phosphides at 298 K. The enhanced activities of nickel phosphides were attributed to the visible‐light‐driven synergistic effect of photogenerated electrons (e−) and hydroxyl radicals (.OH), which came from the oxidation of hydroxide anions by photogenerated holes. This was verified by the fluorescent spectra and the capture experiments of photogenerated electrons and holes as well as hydroxyl radicals in the catalytic hydrogen evolution process. |
| first_indexed | 2024-12-21T12:21:59Z |
| format | Article |
| id | doaj.art-fcd1293e496c4c51beaedcb640469081 |
| institution | Directory Open Access Journal |
| issn | 2191-1363 |
| language | English |
| last_indexed | 2024-12-21T12:21:59Z |
| publishDate | 2020-03-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | ChemistryOpen |
| spelling | doaj.art-fcd1293e496c4c51beaedcb6404690812022-12-21T19:04:17ZengWiley-VCHChemistryOpen2191-13632020-03-019336637310.1002/open.201900335Electrons and Hydroxyl Radicals Synergistically Boost the Catalytic Hydrogen Evolution from Ammonia Borane over Single Nickel Phosphides under Visible Light IrradiationJin Song0Prof. Xiaojun Gu1Hao Zhang2Inner Mongolia Key Laboratory of Coal Chemistry School of Chemistry and Chemical Engineering Inner Mongolia University Hohhot 010021, Inner Mongolia China.Inner Mongolia Key Laboratory of Coal Chemistry School of Chemistry and Chemical Engineering Inner Mongolia University Hohhot 010021, Inner Mongolia China.Inner Mongolia Key Laboratory of Coal Chemistry School of Chemistry and Chemical Engineering Inner Mongolia University Hohhot 010021, Inner Mongolia China.Abstract From the perspective of tailoring the reaction pathways of photogenerated charge carriers and intermediates to remarkably enhance the solar‐to‐hydrogen energy conversion efficiency, we synthesized the three low‐cost semiconducting nickel phosphides Ni2P, Ni12P5 and Ni3P, which singly catalyzed the hydrogen evolution from ammonia borane (NH3BH3) in the alkaline aqueous solution under visible light irradiation at 298 K. The systematic investigations showed that all the catalysts had higher activities under visible light irradiation than in the dark and Ni2P had the highest photocatalytic activity with the initial turnover frequency (TOF) value of 82.7 min−1, which exceeded the values of reported metal phosphides at 298 K. The enhanced activities of nickel phosphides were attributed to the visible‐light‐driven synergistic effect of photogenerated electrons (e−) and hydroxyl radicals (.OH), which came from the oxidation of hydroxide anions by photogenerated holes. This was verified by the fluorescent spectra and the capture experiments of photogenerated electrons and holes as well as hydroxyl radicals in the catalytic hydrogen evolution process.https://doi.org/10.1002/open.201900335synergistic effectammonia boranehydrogen evolutioncatalysts |
| spellingShingle | Jin Song Prof. Xiaojun Gu Hao Zhang Electrons and Hydroxyl Radicals Synergistically Boost the Catalytic Hydrogen Evolution from Ammonia Borane over Single Nickel Phosphides under Visible Light Irradiation ChemistryOpen synergistic effect ammonia borane hydrogen evolution catalysts |
| title | Electrons and Hydroxyl Radicals Synergistically Boost the Catalytic Hydrogen Evolution from Ammonia Borane over Single Nickel Phosphides under Visible Light Irradiation |
| title_full | Electrons and Hydroxyl Radicals Synergistically Boost the Catalytic Hydrogen Evolution from Ammonia Borane over Single Nickel Phosphides under Visible Light Irradiation |
| title_fullStr | Electrons and Hydroxyl Radicals Synergistically Boost the Catalytic Hydrogen Evolution from Ammonia Borane over Single Nickel Phosphides under Visible Light Irradiation |
| title_full_unstemmed | Electrons and Hydroxyl Radicals Synergistically Boost the Catalytic Hydrogen Evolution from Ammonia Borane over Single Nickel Phosphides under Visible Light Irradiation |
| title_short | Electrons and Hydroxyl Radicals Synergistically Boost the Catalytic Hydrogen Evolution from Ammonia Borane over Single Nickel Phosphides under Visible Light Irradiation |
| title_sort | electrons and hydroxyl radicals synergistically boost the catalytic hydrogen evolution from ammonia borane over single nickel phosphides under visible light irradiation |
| topic | synergistic effect ammonia borane hydrogen evolution catalysts |
| url | https://doi.org/10.1002/open.201900335 |
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