Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 278, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119339
Keywords
Metal-organic framework; Nanoarray; Oxidation reaction; Hydrogen evolution; Biomass upgrading
Funding
- National Natural Science Foundation of China [21905181, 21975163, 51902204]
- Shenzhen Innovative Research Team Program [KQTD20190929173914967]
- Instrumental Analysis Center of Shenzhen University
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Replacing oxygen evolution reaction with thermodynamically more favorable organic oxidation reactions is considered as attractive approach to enhance the energy conversion efficiency in electrochemical water splitting. Herein, 'Nanoplatelet-on-Nanoarray' NiCo hydroxide-based electrocatalysts (t-NiCo-MOF) fabricated from the facile transformation of bimetallic metal-organic framework nanoarrays is reported to exhibit rich surface active sites and unprecedented activity towards the oxidation of organic molecules including 5-hydroxymethylfurfural, urea, methanol and glycerol. Benefitting from the synergy between Ni/Co and unique nanostructure which facilitates the charge and mass transfer, the optimal electrode exhibits current densities of 600 similar to 730 mA/cm(2) at 1.4 V vs RHE and the Tafel slopes are in the range of 35 similar to 58 mV/dec depending on the oxidized species. Value-added chemicals such as 2,5-furandicarboxylic acid and formate are produced from HMF and methanol/glycerol (main constituents of 'bio-glycerol') with high FE and superior stability, demonstrating its promises in high-throughput electrochemical biomass upgrading.
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