Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 278, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119303
Keywords
Crystal facet engineering; BiVO4; Glycerol oxidation; Hydrogen fuel
Funding
- Ministry of Science and Technology (MOST) in Taiwan [MOST109-2636-E-011-001]
- MOST, Taiwan [MOST 105-2119-M001-040-MY3, MOST 107-2923-M-001-008-MY2]
- National Center for High-performance Computing of Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica
- MOST in Taiwan
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We report for the first time a comprehensive study addressing the effects of the different BiVO4 crystal surfaces on the photoelectrochemical glycerol oxidation reaction. {010}-dominated BiVO4 exhibited outstanding photocatalytic glycerol oxidation performance, with recorded photocurrent densities (1.4 mA/cm(2)) being 1.4 times the value for {121}-dominant BiVO4. The yield of liquid products obtained over {010}-dominated BiVO4 is also about twice as high as over {121}-dominant BiVO4. The preference of glycerol to adsorb on the {010} facet over the {121} facet has been found to be a factor that determines the activity of BiVO4. Additionally, it was disclosed that {010}-dominated BiVO4 features higher charge carrier densities and a more efficient electron-hole separation, thereby resulting in highly enhanced photoreactivity and photocurrent generation. This work deepens the understanding of the facet dependent reactivity of BiVO4 and provides a prospective strategy for the rational design of optimized photocatalysts for glycerol oxidation reaction.
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