We report a new method for facile synthesis of MoP₂ nanosheets for efficient electrocatalysis of the hydrogen evolution reaction (HER). The resulting MoP₂ nanosheets catalyze the HER in 0.5 M H₂SO₄ with an overpotential of 150 mV being required to deliver a current of 10 mA cm⁻², and a Tafel slope of 81.5 mV dec⁻¹ indicating prevalence of a Volmer-Heyrovsky mechanism and hence H₂ desorption as the rate limiting step of the reaction. The HER overpotential remained nearly constant after over 1000 cycles of continuous cyclic potential polarization between 0.0 V and −0.4 V, and 10 h of chronoamperometric polarization at an overpotential of 150 mV. This work expands the synthetic methods for MoP₂ nanosheets as active, acid-stable and non-noble-metal HER catalysts for large-scale hydrogen production.

我们报告了一种新的方法，可以方便地合成MoP ₂纳米片材，以有效地催化氢析出反应（HER）的电催化。生成的MoP ₂纳米片在0.5 MH ₂ SO _4中催化HER，需要150 mV的超电势才能提供10 mA cm ^-2的电流，Tafel斜率要求为81.5 mV dec ^-1，这表明Volmer-Heyrovsky的流行机理，因此H ₂解吸作为反应的限速步骤。在超过1000个周期的0.0 V和-0.4 V之间的连续循环电势极化以及在150 mV的超电势下10个小时的计时电流极化之后，HER超电势几乎保持恒定。这项工作扩展了MoP ₂纳米片的合成方法，将其用作活性，酸稳定和非贵金属的HER催化剂，可用于大规模制氢。