Efficient four-electron transfer platinum-based oxygen reduction catalysts: A mini review.

Hydrogen fuel cell vehicles have attracted extensive attention for conversion equipment and new energy storage technologies. As an important component of hydrogen fuel cell vehicles, highly stable and active platinum-based (Pt-based) catalysts with 4-electron oxygen reduction reaction (ORR) selectivity are extremely important for promoting the application of this field. In this mini review, based on the ORR mechanism, the feasible strategies to enhance the catalytic stability and 4-electron selectivity of Pt-based catalysts were summarized. Furthermore, the effect mechanisms of each strategy in enhancing catalytic activity and 4-electron selectivity were emphatically discussed and their superiorities and limitations were evaluated. Finally, the research direction and current challenges of Pt-based catalysts were prospected from the perspective of their practical application in hydrogen fuel cell vehicles. • Research progress of Pt-based catalysts for 4-electron ORR is explored. • The strategies of enhancing 4-electron transfer in Pt-based catalysts are summarized. • The superiorities and limitations of each strategy are summarized. • The future researches of Pt-based catalysts applied in fuel cells is put forward. [ABSTRACT FROM AUTHOR]