The DOI matches its Crossref record; 36 of the 36 references it cites were found in a registry or an index.
Selective Photoelectrocatalytic Glycerol Oxidation to Dihydroxyacetone via Enhanced Middle Hydroxyl Adsorption over a Bi2O3-Incorporated Catalyst
Abstract
Photoelectrocatalytic (PEC) glycerol oxidation offers a sustainable approach to produce dihydroxyacetone (DHA) as a valuable chemical, which can find use in cosmetic, pharmaceutical industries, etc. However, it still suffers from the low selectivity (≤60%) that substantially limits the application. Here, we report the PEC oxidation of glycerol to DHA with a selectivity of 75.4% over a heterogeneous photoanode of Bi 2 O 3 nanoparticles on TiO 2 nanorod arrays (Bi 2 O 3 /TiO 2 ). The selectivity of DHA can be maintained at ∼65% under a relatively high conversion of glycerol (∼50%). The existing p–n junction between Bi 2 O 3 and TiO 2 promotes charge transfer and thus guarantees high photocurrent density. Experimental combined with theoretical studies reveal that Bi 2 O 3 prefers to interact with the middle hydroxyl of glycerol that facilitates the selective oxidation of glycerol to DHA. Comprehensive reaction mechanism studies suggest that the reaction follows two parallel pathways, including electrophilic OH* (major) and lattice oxygen (minor) oxidations. Finally, we designed a self-powered PEC system, achieving a DHA productivity of 1.04 mg cm –2 h –1 with >70% selectivity and a H 2 productivity of 0.32 mL cm –2 h –1 . This work may shed light on the potential of PEC strategy for biomass valorization toward value-added products via PEC anode surface engineering.
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Metadata
- Authors
- Luo, L., Chen, W., Xu, S.-M., Yang, J., Li, M., Zhou, H., Xu, M., Shao, M., Kong, X., Li, Z., & Duan, H.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2022-03-30
- Volume
- 144
- Issue
- 17
- Pages
- 7720-7730
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W4221039884
- Cited by
- 312
- References
- 36
- FWCI
- 10.61
- Type
- journal article
- Language
- en
- Open access
- closed
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