High-performance quaternary PtRuIrNi electrocatalysts with hierarchical nanostructured carbon support

PtRuIrNi quaternary system is explored by a robotic dispenser and combinatorial optical screening method, and a quaternary catalyst with Pt34Ru30Ir13Ni23 composition is found to be the most active, demonstrating superior electrochemical catalytic activity and stability for methanol oxidation compared to commercial Pt50-Ru50 binary catalyst.174