Photoelectrochemical Catalysis toward Selective Anaerobic Oxidation of Alcohols

Zhang, Ruikang; Shao, Mingfei; Li, Zhenhua; Ning, Fanyu; Wei, Min; Evans, David G.; Duan, Xue

doi:10.1002/chem.201701107

Cited by 43 publications

(25 citation statements)

References 57 publications

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“…High-resolution (HR)TEM images show that both TiO 2 and Bi 2 O 3 are well crystallized (Figure c), with fringe distances of 0.326 and 0.297 nm that closely match the (110) and (001) planes of TiO 2 , respectively, and with a fringe distance of 0.319 nm that can be assigned to the (201) plane of Bi 2 O 3. , X-ray diffraction (XRD) patterns reveal a typical rutile TiO 2 phase (JCPDS #21-1276) for both TiO 2 and Bi 2 O 3 /TiO 2 (Figure d), together with the peaks from the FTO substrate . The peaks at 27.9 and 46.2° were observed in the Bi 2 O 3 /TiO 2 sample, which can be indexed to the (201) and (222) reflections of β-Bi 2 O 3 (JCPDS #78-1793) .…”

Section: Resultsmentioning

confidence: 99%

Selective Photoelectrocatalytic Glycerol Oxidation to Dihydroxyacetone via Enhanced Middle Hydroxyl Adsorption over a Bi₂O₃-Incorporated Catalyst

et al. 2022

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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 Bi2O3 nanoparticles on TiO2 nanorod arrays (Bi2O3/TiO2). The selectivity of DHA can be maintained at ∼65% under a relatively high conversion of glycerol (∼50%). The existing p–n junction between Bi2O3 and TiO2 promotes charge transfer and thus guarantees high photocurrent density. Experimental combined with theoretical studies reveal that Bi2O3 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 H2 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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Section: Resultsmentioning

confidence: 99%

Selective Photoelectrocatalytic Glycerol Oxidation to Dihydroxyacetone via Enhanced Middle Hydroxyl Adsorption over a Bi₂O₃-Incorporated Catalyst

et al. 2022

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“…2d ). 32 The BnOH oxidation performance is summarized in Table S3. † In electrocatalytic mode (without illumination; with a voltage bias of 1.22 V vs. RHE), BnOH oxidation was negligible.…”

Section: Resultsmentioning

confidence: 99%

Photoelectrochemical alcohols oxidation over polymeric carbon nitride photoanodes with simultaneous H₂ production

Karjule

Phatake

Barzilai³

et al. 2022

J. Mater. Chem. A

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“…A couple of examples of photoanodes for the photoelectrochemical oxidation of BA have been recently reported in the literature, dealing with a BiVO 4 based material reported by Berlinguette et al, [65] and a nanostructured TiO 2 or indium tin oxide (ITO) semiconductor decorated with a Ru-polypyridil chromophore and a Ru-based oxidation catalyst reported by Meyer et al [67] The meso-SnO 2 |KuQ photoanodes were tested towards the photoelectrochemical oxidation of BA both in aqueous and organic medium. In aqueous medium, in the presence of 0.5 M Na 2 SO 4 electrolyte [68], an increase in photocurrent density of 10 μA/cm 2 is observed in the 0.5-1.0 V region, upon addition of 1 M BA (Fig. S16 in Supporting Information).…”

Section: Perspectives: Photoelectrochemical Oxidation Of Benzyl Alcoholmentioning

confidence: 99%

Artificial photosynthesis: photoanodes based on polyquinoid dyes onto mesoporous tin oxide surface

Volpato

Colusso

Paoloni

et al. 2021

Photochem Photobiol Sci

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Dye-sensitized photoelectrochemical cells represent an appealing solution for artificial photosynthesis, aimed at the conversion of solar light into fuels or commodity chemicals. Extensive efforts have been directed towards the development of photoelectrodes combining semiconductor materials and organic dyes; the use of molecular components allows to tune the absorption and redox properties of the material. Recently, we have reported the use of a class of pentacyclic quinoid organic dyes (KuQuinone) chemisorbed onto semiconducting tin oxide as photoanodes for water oxidation. In this work, we investigate the effect of the SnO2 semiconductor thickness and morphology and of the dye-anchoring group on the photoelectrochemical performance of the electrodes. The optimized materials are mesoporous SnO2 layers with 2.5 μm film thickness combined with a KuQuinone dye with a 3-carboxylpropyl-anchoring chain: these electrodes achieve light-harvesting efficiency of 93% at the maximum absorption wavelength of 533 nm, and photocurrent density J up to 350 μA/cm2 in the photoelectrochemical oxidation of ascorbate, although with a limited incident photon-to-current efficiency of 0.075%. Calculations based on the density functional theory (DFT) support the role of the reduced species of the KuQuinone dye via a proton-coupled electron transfer as the competent species involved in the electron transfer to the tin oxide semiconductor. Finally, a preliminary investigation of the photoelectrodes towards benzyl alcohol oxidation is presented, achieving photocurrent density up to 90 μA/cm2 in acetonitrile in the presence of N-hydroxysuccinimide and pyridine as redox mediator and base, respectively. These results support the possibility of using molecular-based materials in synthetic photoelectrochemistry. Graphic abstract

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Photoelectrochemical Catalysis toward Selective Anaerobic Oxidation of Alcohols

Cited by 43 publications

References 57 publications

Selective Photoelectrocatalytic Glycerol Oxidation to Dihydroxyacetone via Enhanced Middle Hydroxyl Adsorption over a Bi₂O₃-Incorporated Catalyst

Selective Photoelectrocatalytic Glycerol Oxidation to Dihydroxyacetone via Enhanced Middle Hydroxyl Adsorption over a Bi₂O₃-Incorporated Catalyst

Photoelectrochemical alcohols oxidation over polymeric carbon nitride photoanodes with simultaneous H₂ production

Artificial photosynthesis: photoanodes based on polyquinoid dyes onto mesoporous tin oxide surface

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Photoelectrochemical Catalysis toward Selective Anaerobic Oxidation of Alcohols

Cited by 43 publications

References 57 publications

Selective Photoelectrocatalytic Glycerol Oxidation to Dihydroxyacetone via Enhanced Middle Hydroxyl Adsorption over a Bi2O3-Incorporated Catalyst

Selective Photoelectrocatalytic Glycerol Oxidation to Dihydroxyacetone via Enhanced Middle Hydroxyl Adsorption over a Bi2O3-Incorporated Catalyst

Photoelectrochemical alcohols oxidation over polymeric carbon nitride photoanodes with simultaneous H2 production

Artificial photosynthesis: photoanodes based on polyquinoid dyes onto mesoporous tin oxide surface

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Product

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Selective Photoelectrocatalytic Glycerol Oxidation to Dihydroxyacetone via Enhanced Middle Hydroxyl Adsorption over a Bi₂O₃-Incorporated Catalyst

Selective Photoelectrocatalytic Glycerol Oxidation to Dihydroxyacetone via Enhanced Middle Hydroxyl Adsorption over a Bi₂O₃-Incorporated Catalyst

Photoelectrochemical alcohols oxidation over polymeric carbon nitride photoanodes with simultaneous H₂ production