Journal
CHINESE JOURNAL OF CATALYSIS
Volume 42, Issue 10, Pages 1763-1771Publisher
ELSEVIER
DOI: 10.1016/S1872-2067(21)63799-3
Keywords
SrMoO4; Plasmonic semiconductor; Localized surface plasmon resonance; Oxygen vacancy; Photocatalytic nitrogen reduction
Funding
- National Key Research and Development Program of China [2019YFE0121600]
- Natural Science Foundation of Shaanxi province [2019JM-298]
- Xidian University [YJS2113]
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Plasmonic SrMoO4 with stable and tunable localized surface plasmon resonance (LSPR) absorption has been developed by regulating the concentration of oxygen vacancies, enabling more efficient utilization of solar energy for the synthesis of ammonia.
Photocatalytic nitrogen reduction for the green synthesis of ammonia at ambient conditions has been slowed by the narrow light harvesting range, low activity and high charge recombination of photocatalysts. Plasmonic semiconducting nanomaterials are becoming the promising candidates for nitrogen photofixation because of the broad absorption spectrum, rich defects and hot carriers. In the present study, plasmonic SrMoO4 is developed by regulating the concentration of oxygen vacancies that are accompanied in the reduction process from Mo6+ to Mo5+. The stable and tunable localized surface plasmon resonance (LSPR) absorption in visible and near infrared light range makes the wide bandgap SrMoO4 utilize the solar energy more efficiently. Energetic electrons from both the intrinsic band excitation and the LSPR excitation enable the reduction of dinitrogen molecules thermodynamically in ultrapure water to ammonia. This work provides a unique clue to design efficient photocatalysts for nitrogen fixation. (C) 2021, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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