Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 304, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120914
Keywords
Bimetallic phosphides; Heterojunctions; Hydrogen evolution reaction; Oxygen evolution reaction; Overall water splitting
Funding
- National Natural Science Foundation of China [21971086]
- Natural Science Founda-tion of Shandong Province [ZR2019MB013]
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In this study, a new catalyst Ni2P-Ru2P/NF was reported, which showed excellent electrocatalytic performance for the oxygen and hydrogen evolution reactions in alkaline media. Additionally, it demonstrated fast catalytic performance for full water splitting with a low cell voltage.
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.
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