Ru doped molybdenum-based nanowire arrays for efficient hydrogen evolution over a broad pH range.

Searching and developing earth-abundant electrocatalysts with predominant activity and favorable stability are significant to resolve increasing environmental pollution and serious energy crisis. In this paper, Mo-based nanowire arrays (NWAs) were synthesized on carbon fiber paper (CFP), and then Ru-MoP NWAs/CFP was successfully assembled through impregnation of Ru and phosphorization. The as-obtained Ru-MoP NWAs/CFP exhibited excellent performance over a broad pH range. As a result, overpotentials of 39.0, 49.9, and 67.1 mV were required to reach the current density of 10 mA cm -2 in 0.5 M H 2 SO 4 , 1 M KOH, and 1 M PBS, respectively. The outstanding performance of Ru-MoP NWAs/CFP is mainly related to the introduction of Ru and P atoms, which may enhance the conductivity of the catalyst and develop additional HER active sites. Our work may afford a novel designing approach to develop high performance HER electrocatalysts.