Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 11, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202113362
Keywords
Biomass; Cation Effect; Cation-Intermediate Interaction; Electrocatalysis; Glycerol
Categories
Funding
- National Key Basic Research Program of China [2019YFC1604602]
- Fellowship of China Postdoctoral Science Foundation [2020M681149]
- National Natural Science Foundation of China [21972023, 21773032, 22022301, 21733004]
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This study discovered an unconventional cation effect on the electro-reforming of glycerol, which could regulate the product selectivity by interacting with the glycerol oxidation intermediates. The maximum formate efficiency of 81.3% was achieved in LiOH solution.
Electro-reforming of renewable biomass resources is an alternative technology for sustainable pure H-2 production. Herein, we discovered an unconventional cation effect on the concurrent formate and H-2 production via glycerol electro-reforming. In stark contrast to the cation effect via forming double layers in cathodic reactions, residual cations at the anode were discovered to interact with the glycerol oxidation intermediates to steer its product selectivity. Through a combination of product analysis, transient kinetics, crown ether trapping experiments, in situ IRRAS and DFT calculations, the aldehyde intermediates were discovered to be stabilized by the Li+ cations to favor the non-oxidative C-C cleavage for formate production. The maximal formate efficiency could reach 81.3 % under approximate to 60 mA cm(-2) in LiOH. This work emphasizes the significance of engineering the microenvironment at the electrode-electrolyte interface for efficient electrolytic processes.
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