MOF-199-Derived C-MOF-Cu@CuMoPd for Alkaline Electrocatalytic Hydrogen Evolution
摘要
Hydrogen energy is considered an ideal choice for future energy due to its high energy density and environmental-friendliness. MOF-199 has attracted attention for its rich active sites and highly dispersed metal centers, but its poor conductivity limits its application in electrocatalysis. In this paper, MOF-199 was annealed to prepare C-MOF-Cu nanoparticles (NPs), which were then combined with the two-dimensional nanomaterial CuMoPd to ultimately form the C-MOF-Cu@CuMoPd catalyst. When the molar ratio of Cu:Mo:Pd was 18:2:5, the CuMoPd nanomaterial exhibited optimal electrocatalytic performance, requiring only a 118.0 mV overpotential to sustain a cathodic current density of 10 mA cm−2, with a Tafel slope of 48.0 mV dec−1. The framework structure of C-MOF-Cu NPs, derived from MOF-199, facilitated the uniform dispersion of CuMoPd nanomaterial, enhancing both the conductivity and surface area of the catalyst. This improvement further enhanced its electrocatalytic hydrogen evolution performance. At a loading of 20 wt.% CuMoPd, the overpotential and Tafel slope at a current density of 10 mA cm−2 were 78.0 mV and 22.0 mV dec−1, respectively, demonstrating the significant potential of C-MOF-Cu@CuMoPd in enhancing catalytic activity.