期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 23, 期 34, 页码 8142-8147出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201701107
关键词
alcohols oxidization; green synthesis; photoelectrochemical water splitting; TiO2 nanowire arrays
资金
- National Natural Science Foundation of China [U1462118]
- 973 Program [2014CB932102]
- Fundamental Research Funds for the Central Universities [buctrc201506, PYCC1704]
Selective oxidation of alcohols to aldehydes plays an important role in perfumery, pharmaceuticals, and agrochemicals industry. Different from traditional catalysis or photocatalytic process, here we report an effective photoelectrochemical (PEC) approach for selective anaerobic oxidation of alcohols accompanied with H2 production by means of solar energy. By using TiO2 nanowires modified with graphitic carbon layer as photoanode, benzyl alcohol (BA) has been oxidized to benzaldehyde with high efficiency and selectivity (> 99%) in aqueous media at room temperature, superior to individual electrocatalytic or photocatalytic processes. Moreover, this PEC synthesis method can be effectively extended to the oxidation of several other aryl alcohols to their corresponding aldehydes under mild conditions. The electron spin resonance (ESR) results indicate the formation of intermediate active oxygen (O-2(center dot)) on the photoanode, which further reacts with alcohols to produce final aldehyde compounds.
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