Coupling efficient biomass upgrading with H2 production: Via bifunctional CuxS@NiCo-LDH core-shell nanoarray electrocatalysts
RIS ID
141433
Abstract
2019 The Royal Society of Chemistry. To boost hydrogen production from water splitting, the electrochemical oxidation of biomass-derived molecules to produce valuable chemicals is regarded as a promising approach to replace the kinetically sluggish oxygen evolution reaction. Herein, copper sulfide nanowire@NiCo-layered double hydroxide (LDH) nanosheet core-shell nanoarrays are fabricated as efficient bifunctional electrocatalysts for 5-hydroxymethylfurfural (HMF) oxidation and water reduction to simultaneously produce value-added 2,5-furandicarboxylic acid (FDCA) and hydrogen fuel with less energy consumption. Benefiting from the fast charge transfer induced by the CuxS core, the Co/Ni interaction in the LDH nanosheet layer and the open nanostructure, the optimized catalysts exhibit superior electrocatalytic activity (record-high 87 mA cm-2 @ 1.3 V vs. RHE for HMF oxidation; η = 107 mV @ 10 mA cm-2 for HER) and durability; the faradaic efficiency towards FDCA and H2 is close to unity. The bifunctional two-electrode electrolyzer only requires a low voltage of 1.34 V to co-generate H2 and FDCA at 10 mA cm-2. This work highlights the significance of tuning the redox properties of transition metals and constructing nanoarray electrocatalysts towards more efficient energy utilization.
Publication Details
Deng, X., Kang, X., Li, M., Xiang, K., Wang, C., Guo, Z., Zhang, J., Fu, X. & Luo, J. (2020). Coupling efficient biomass upgrading with H2 production: Via bifunctional CuxS@NiCo-LDH core-shell nanoarray electrocatalysts. Journal of Materials Chemistry A, 8 (3), 1138-1146.