Solar-driven valorisation of glycerol on BiVO4 photoanodes: effect of co-catalyst and reaction media on reaction selectivity
| Autor: | Nicholas C. Pflug, Christoph R. Müller, Denis A. Kuznetsov, Yi-Hsuan Wu, Alexey Fedorov |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Chemistry Dihydroxyacetone 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Redox 0104 chemical sciences Catalysis chemistry.chemical_compound Chemical engineering Glyceraldehyde Biodiesel production Bismuth vanadate Glycerol Hydroxide General Materials Science 0210 nano-technology |
| Zdroj: | Journal of Materials Chemistry A, 9 (10) |
| ISSN: | 2050-7488 2050-7496 |
| DOI: | 10.3929/ethz-b-000476198 |
| Popis: | The electrochemical valorization of glycerol, a by-product from biodiesel production, has received significant attention, yet systems for the efficient reforming of glycerol that are based on non-precious metals have rarely been reported. Here, we introduce tungsten-doped bismuth vanadate (W:BiVO4) electrodes combined with an atomic-layer-deposited nickel (oxy)hydroxide (NiOx(OH)y) co-catalyst, as a promising photoanode material for the photoelectrochemical (PEC) oxidation of glycerol. To reveal trends in the reaction kinetics and selectivities, glycerol oxidation reaction (GOR) was investigated in varying electrolytes and at different applied biases. The photoanode developed in our study provides a rare example of the efficient production of the high value-added products, dihydroxyacetone (DHA), glyceraldehyde (GALD), and glycolaldehyde (GCALD), in the absence of precious metal catalysts. Under optimized conditions, W:BiVO4 with a NiOx(OH)y co-catalyst features oxidation currents and onset potentials for glycerol/water oxidation that are on par with state-of-the-art transition-metal-oxide photoanodes employed for the reforming of organic species, which marks an important step towards affordable solar-driven electrolyzers and direct alcohol fuel cells. Journal of Materials Chemistry A, 9 (10) ISSN:2050-7488 ISSN:2050-7496 |
| Databáze: | OpenAIRE |
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