Coupling overall water splitting and biomass oxidation via Fe-doped Ni2P@C nanosheets at large current density

作者：Li, Di; Li, Zengyong; Zou, Ren; Shi, Ge; Huang, Yiming; Yang, Wu; Yang, Wang; Liu, Chuanfu^*; Peng, Xinwen^*

来源：Applied Catalysis B: Environmental , 2022, 307: 121170.

DOI：10.1016/j.apcatb.2022.121170

• Bifunctional electrocatalysts
• Overall water splitting
• Biomass monosaccharide oxidation
• DFT calculation

Developing efficient bifunctional electrocatalyst for overall water splitting and conversion of biomass into value-added products at large current density is essential but challenging. Herein, a hierarchical Fe-doped Ni2P nanosheets hybridized with C on Ni foam (Fe-Ni2P@C/NF) was developed as a robust bifunctional catalyst with excellent catalytic activity for hydrogen evolution reaction (HER) with overpotentials of 75 and 313 mV at 10 and 1000 mA cm(-2), respectively, and as well as for OER with a lower overpotential of 269 mV at 400 mA cm(-2). Particularly, the integrated double-electrode electrolyzer for simultaneous HER and biomass-derived mono-saccharide oxidation reaction (MOR) using Fe-Ni2P@C/NF only requires a low voltage of 1.55 V to drive a current density of 100 mA cm(-2). Meanwhile, the value-added lactic acid is obtained at the anode. This strategy of coupling biomass oxidation to promote H-2 production can significantly reduce energy consumption and obtain additional high value-added products.