A review of hollow Pt-based nanocatalysts applied in proton exchange membrane fuel cells

► We present a review of the progress made for synthesizing hollow Pt-based nanocatalysts applied in PEMFCs. ► Hollow pure Pt catalysts, Pt-based alloy catalysts and other correlative hollow precious nanomaterials are reviewed. ► The methods used to synthesize hollow Pt-based nanocatalysts are summarized and compared. ► Galvanic replacement method is the most used and prospective method in this field. ► The emergent challenges and future developments of hollow Pt-based nanocatalysts are discussed.