Modulating Electronic Structure of NiCoP Nanoarrays by B Doping for Boosting Overall Water Splitting
2022
Zhan, Zhenxiang | Zhang, Shiwei | Du, Yong | Yin, Ping | Lei, Ting
B-doped NiCoP nanoarrays on nickel foam were successfully synthesized by a simple solvothermal method and the following phosphorization. The optimized 10B-NiCoP/NF catalysts exhibited excellent catalytic activity and stability as compared with pristine NiCoP/NF catalysts for HER and OER in 1 M KOH, which was even better than 20% Pt–C and IrO², respectively. Additionally, the 10B-NiCoP/NF catalyst exhibits superior stability for HER and OER performances at a large current density (100 mA cm–²). A complementary experimental and theoretical study suggests that B doping could modulate the electronic structure of NiCoP to enhance HER electrocatalytic activity. Moreover, the electrolyzer assembled with 10B-NiCoP as bifunctional electrodes requires only 1.51 V to deliver a current density of 10 mA cm–².
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