Gu, Z;
An, X;
Liu, R;
Xiong, L;
Tang, J;
Hu, C;
Liu, H;
(2021)
Interface-modulated nanojunction and microfluidic platform for photoelectrocatalytic chemicals upgrading.
Applied Catalysis B: Environmental
, 282
, Article 119541. 10.1016/j.apcatb.2020.119541.
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Abstract
Photoelectrocatalytic oxidation provides a technically applicable way for solar-chemical synthesis, but its efficiency and selectivity are moderate. Herein, a microfluidic photoelectrochemical architecture with 3-D microflow channels is constructed by interfacial engineering of defective WO3/TiO2 heterostructures on porous carbon fibers. Kelvin probe force microscopy and photoluminescence imaging visually evidence the charge accumulation sites on the nanojunction. This efficient charge separation contributes to a 3-fold enhancement in the yield of glyceraldehyde and 1,3-dihydroxyacetone during glycerol upgrading, together with nearly doubled production of high value-added KA oil and S2O82− oxidant through cyclohexane and HSO4− oxidization, respectively. More importantly, the microfluidic platform with enhanced mass transfer exhibits a typical reaction selectivity of 85 %, which is much higher than the conventional planar protocol. Integrating this microfluidic photoanode with an oxygen reduction cathode leads to a self-sustained photocatalytic fuel cell with remarkably high open-circuit voltage (0.9 V) and short-circuit current (1.2 mA cm−2).
| Type: | Article |
|---|---|
| Title: | Interface-modulated nanojunction and microfluidic platform for photoelectrocatalytic chemicals upgrading |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.apcatb.2020.119541 |
| Publisher version: | https://doi.org/10.1016/j.apcatb.2020.119541 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10112436 |
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