Journal
CHEMICAL ENGINEERING JOURNAL
Volume 430, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.132783
Keywords
Hydrogen evolution; Deep eutectic solvents; Glucose oxidation; Overall water splitting; DFT calculation
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Funding
- Fundamental Research Funds for the Central Universities [2019PY13]
- Science and Technology Basic Resources Investigation Program of China [2019FY100903]
- National Natural Science Foundation of China [21736003, 31971614]
- State Key Laboratory of Pulp and Paper Engineering [2020ZR01]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2016A030306027]
- Guangdong Natural Science Funds [2017A030313130]
- China Postdoctoral Science Foundation [2019 T120725, 2019 M652882]
- Guangzhou science and technology funds [201904010078]
- National Program for Support of Top-notch Young Professionals
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This study prepared a hybrid of cobalt nanoparticles supported in nitrogen-doped porous carbon using a biomass-based deep eutectic solvent as a precursor, serving as a bifunctional electrocatalyst for efficient hydrogen generation and conversion of glucose into valuable chemicals with low cell voltage requirement.
The electrocatalytic water splitting for hydrogen production is greatly limited by the sluggish anodic OER. Herein, a hybrid of cobalt nanoparticles supported in nitrogen doped porous carbon (Co@NPC) is prepared by using a biomass-based ternary deep eutectic solvent (DES) as precursor and self-templates, which is utlized as bifunctional electrocatalyst for boosting H2 generation and converting glucose into valuable chemicals simultaneously. Importantly, only a small cell voltage of 1.56 V is required to deliver 10 mA cm-2, which is 180 mV lower than that of overall water splitting. Density functional theory (DFT) calculations confirm that nitrogen doping porous carbon could synergistically optimize adsorption energies of H2O (Delta E*H2O) and *H adsorption free energies (Delta G*H), enhancing catalytic activity toward HER. This work highlights the potential application prospects of using glucose oxidation reaction (GOR) instead of OER to promote H2 generation and product valueadded chemicals.
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