One-step construction of Fe0.5Mo0.5Se2 with P doping on carbon cloth for efficient hydrogen evolution in acidic and alkaline media.

The exploring of transition metal-based selenides (TMSes) as the efficient electrocatalysts in acidic and alkaline media has received extensive for a wide range of practical applications. We combine the advantages of self-supporting electrode, P doping and synergistic effect between bimetallic materials to synthesize P-doped Fe 0.5 Mo 0.5 Se 2 grown on carbon cloth (P–Fe 0.5 Mo 0.5 Se 2 /CC), which displays high hydrogen evolution reaction (HER) catalytic property in both electrolytes. The P–Fe 0.5 Mo 0.5 Se 2 /CC catalyst with proportion-optimized shows good performance. Specifically, it has low overpotentials of 102 and 179 mV at current density of 10 mA cm−2 and small Tafel slope values of 54 and 80 mV dec−1 in 0.5 M H 2 SO 4 and 1 M KOH media, respectively. This work offers the simple way and perspective worth to investigate the design of efficient electrocatalyst in both solutions. P–Fe 0.5 Mo 0.5 Se 2 /CC with the proportion-optimized displays well HER performance in both acidic and alkaline media. Specifically, it has the low overpotential of 102/179 mV at 10 mA cm−2 and small Tafel slope of 54/80 mV dec−1 in acidic/alkaline medium, respectively. It is mainly attributable to the self-supporting electrode increasing the electrical conductivity of catalyst, P doping enhancing the intrinsic activity of catalyst and the synergistic effect enhancing the intrinsic activity to achieve well HER property. [Display omitted] • P–Fe 0.5 Mo 0.5 Se 2 /CC has good HER activity in both acidic and alkaline media. • P–Fe 0.5 Mo 0.5 Se 2 /CC as the self-standing electrode can avoid the use of binders. • The synergistic effect between FeSe 2 and MoSe 2 enhances HER performance. • P doping has the positive contribution for the better activity of P–Fe 0.5 Mo 0.5 Se 2 /CC. [ABSTRACT FROM AUTHOR]