Sustainable solid-state synthesis of uniformly distributed PdAg alloy nanoparticles for electrocatalytic hydrogen oxidation and evolution

New sustainable syntheses based on solid-state strategies have sparked enormous attention and provided novel routes for the synthesis of supported metallic alloy nanocatalysts (SMACs). Despite considerable recent progress in this field, most developed methods suffer from either complex operations or poorly controlled morphology, which seriously limits their practical applications. Here, we a strategy PdAg nanoparticles (NPs) with an ultrafine size good dispersion various carbon matrices by directly grinding precursors agate mortar at room temperature. Interestingly, no solvents organic reagents are used procedure. This simple green procedure provides NPs clean surfaces thus abundance accessible active sites. Based combination property synergistic effects between Pd Ag atoms, endow high intrinsic activity, PdAg/C samples exhibit excellent activities as electrocatalysts both hydrogen oxidation evolution reactions (HOR HER) basic medium. 9 1 /C showed highest activity HOR largest j 0,m value 26.5 A g ?1 0,s 0.033 mA cm ?2 , well HER, lowest overpotential 68 mV 10 . As synthetic method can be easily adapted to other systems, present scalable may open opportunity general wide range well-defined SMACs diverse facile is produce series that highly dispersed supports. The resulting stabilities HER.