期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 37, 页码 9802-9805出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201404748
关键词
ammonia; localized surface plasmon; nanostructures; nitrogen fixation; photochemistry
资金
- Ministry of Education, Culture, Sports, Science, and Technology of Japan: KAKENHI [23225006]
- Japan Society for the Promotion of Science (JSPS) [25888002, 25107501]
- Nanotechnology Platform (Hokkaido University)
- Low-Carbon Research Network of Japan
- Grants-in-Aid for Scientific Research [25888002, 23225006, 25107501] Funding Source: KAKEN
We have successfully developed a plasmon-induced technique for ammonia synthesis that responds to visible light through a strontium titanate (SrTiO3) photoelectrode loaded with gold (Au) nanoparticles. The photoelectrochemical reaction cell was divided into two chambers to separate the oxidized (anodic side) and reduced (cathodic side) products. To promote NH3 formation, a chemical bias was applied by regulating the pHvalue of these compartments, and ethanol was added to the anodic chamber as a sacrificial donor. The quantity of NH3 formed at the ruthenium surface, which was used as a co-catalyst for SrTiO3, increases linearly as a function of time under irradiation with visible light at wavelengths longer than 550nm. The NH3 formation action spectrum approximately corresponds to the plasmon resonance spectrum. We deduced that plasmon-induced charge separation at the Au/SrTiO3 interface promotes oxidation at the anodic chamber and subsequent nitrogen reduction on the cathodic side.
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