Hierarchically StructuredPtand Non‐Pt‐Based Electrocatalysts forPEMFuel Cells

Abstract

Hierarchical Pt/non‐Pt alloy electrocatalysts demonstrate high activity, surface area, and stability, transforming them into attractive candidates for electrocatalysis in fuel cells. Oxygen reduction reaction ( ORR ) and methanol oxidation reaction ( MOR ) activity, as well as other electrochemical properties of these hierarchical electrocatalysts supported on metal oxides or carbonaceous materials are presented, along with a short review of their synthesis methods.