Efficient Hydrogen Evolution Using Pt‐Pd Catalyst with Co‐MOF as Sacrificial Template

Abstract The development of highly active hydrogen evolution electrocatalysts is key to overcoming bottlenecks in hydrogen energy industrialization and advancing the hydrogen economy from laboratory research to large‐scale application. However, Pt‐based catalysts are confronted with challenges such as high cost and poor stability. Here, EDM‐Co‐MOF@Pt‐Pd catalyst is synthesized via a simple two‐step method utilizing Co‐MOF as a sacrificial template. The in situ decomposed Co‐MOF releases Co 2+ and dimethylimidazole ligands into the solution. Under the action of cathode voltage, Pt and Pd are induced to preferentially nucleate at the defect sites on the surface of nickel foam through spontaneous substitution reactions, effectively improving the dispersion of Pt and Pd nanoparticles. Meanwhile, the d‐band centers of Pt and Pd shift down, optimizing their adsorption of reaction intermediates. Under the combined effect of these two aspects, the HER overpotential of this catalyst at 10 mA cm −2 is only 16 mV, which is superior to the existing noble metal catalysts. Moreover, after running for 120 h, the HER overpotential only increases by 11 mV, proving that the catalytic activity and stability have been significantly improved. It overcomes the tendency of traditional precious metal catalysts to aggregate and deactivate, resulting in superior stability and significant potential.