Abstract
Rational design and exploitation of efficient and inexpensive catalysts for water electrolysis are highly desired, yet very challenging. Herein, for the first time, we report a nanostructured catalyst of nickel phosphides ruthenium phosphides self-supported on nickel foam (Ni2P-Ru2P/NF) through an in situ growthphosphorization process. As expected, by virtue of prominent intrinsic activity, rich electrochemically active sites, and high electronic conductivity, the resultant Ni2P-Ru2P/NF exhibits enhanced electrocatalytic behavior for the oxygen evolution reaction and hydrogen evolution reaction, which delivers low overpotentials of 160 and 101 mV at 10 mA cm(-2) in alkaline media, respectively. Remarkably, the Ni2P-Ru2P/NF can dramatically accelerate full water splitting with an ultralow cell voltage of 1.45 V at 10 mA cm(-2), which far exceeds the benchmark Pt-C/NF//RuO2/NF (1.64 V) and ranks among the best electrocatalysts previously reported.
NSTL
Elsevier