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- Title
Photothermal‐Assisted Photocatalytic Nitrogen Oxidation to Nitric Acid on Palladium‐Decorated Titanium Oxide.
- Authors
Zhang, Xuerui; Shi, Run; Li, Zhenhua; Zhao, Jiaqing; Huang, Huining; Zhou, Chao; Zhang, Tierui
- Abstract
Industrial nitric acid production involves multistep processes operating at high temperatures and pressures. Photocatalysis offers an alternative approach for directly transforming nitrogen molecules into nitrogen‐containing compounds under ambient conditions but still faces visible light utilization and product selectivity restrictions. Herein, a tandem photothermal‐assisted photocatalytic nitrogen oxidation system based on palladium‐decorated hydrogenated titanium oxide is fabricated, in which nitric acid is produced as the only nitrogen fixation product. The yield of nitric acid increases from 0.56 µmol g−1 h−1 at room temperature to 4.58 µmol g−1 h−1 (1.42 ppm) at 200 °C, accompanied by an enhanced quantum yield from 0.24% to 0.99% at 350 nm. The photothermal effect of palladium nanoparticles promotes the generation of superoxide radicals and nitrogen oxide intermediates in the gas–solid phase nitrogen oxidation process and contributes to improved nitric acid productivity. Therefore, the photothermal‐assisted photocatalytic nitrogen oxidation strategy opens new avenues toward developing clean and energy‐saving nitric acid production.
- Subjects
PHOTOCATALYTIC oxidation; TITANIUM oxides; NITRIC acid; PHOTOTHERMAL effect; NITROGEN fixation; NITROGEN oxides
- Publication
Advanced Energy Materials, 2022, Vol 12, Issue 13, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.202103740