Amplifying Intermetal Bias of Pt‐Rh Alloy Nanolayers for Facilitated Hydrogen Inter‐Diffusion and Evolution

/NC cathode can reduce the proton diffusion resistance from 0.95 Ω of Pt/C to 0.69 Ω at a cell voltage of 1.5 V due to the promoted hydrogen species diffusion on catalyst surface, largely decreasing the cell voltage and extending the lifespan by 3.2 times.