Photoelectrocatalytic Reforming of Polyol-based Biomass into CO and H 2 over Nitrogen-doped WO 3 with Built-in Electric Fields

CO and H evolution from renewable and abundant biomass represent a sustainable way, but is challenged to be produced under mild conditions. Herein, we propose to produce CO and H from biomass via a divided photoelectrochemical (PEC) cell at room temperature. Nitrogen doped tungsten trioxide (N-WO )...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2022-10, Vol.61 (42), p.e202210745
Main Authors: Kong, Fanhao, Zhou, Hongru, Chen, Zhiwei, Dou, Zhaolin, Wang, Min
Format: Article
Language:English
Subjects:
Biomass
Ethylene Glycols
Fructose
Glucose
Glycerol
Inulin
Lactose
Maltose
Nitrogen
Platinum
Polymers
Sucrose
Xylose
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Summary:CO and H evolution from renewable and abundant biomass represent a sustainable way, but is challenged to be produced under mild conditions. Herein, we propose to produce CO and H from biomass via a divided photoelectrochemical (PEC) cell at room temperature. Nitrogen doped tungsten trioxide (N-WO ) photoanode reforms biopolyols to CO and H , and platinum cathode reduces H to H , achieving CO evolution rate of 45 mmol m  h (>75 % gas selectivity) and H evolution rate of 237 mmol m  h with purity >99.99 % from glycerol. The nitrogen doping induces structure polarity of WO photoanode, leading to the formation of an internal electric field which promotes the separation and transfer of the photoinduced charges and improves PEC efficiency. A wide range of biopolyols, such as ethylene glycol, xylose, fructose, glucose, sucrose, lactose, maltose, and inulin were effectively converted into CO and H . This work provides a promising method to produce highly pure H together with CO from biomass.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202210745