Preparation of Hollow CeO2/CePO4 with Nitrogen and Phosphorus Co-Doped Carbon Shells for Enhanced Oxygen Reduction Reaction Catalytic Activity

Achieving active and sustainable electrocatalysts for the oxygen reduction reaction with low cost and high performance attracts great interest in the field of fuel cells. Here, we report a facile route to prepare hollow CeO2/CePO4@N,P co-doped carbon by pyrolyzing CeO2@polyaniline obtained in the presence of phytic acid. By virtue of the co-doping of N and P elements as well as the existence of oxygen vacancies and the formation of a void, the product illustrated excellent catalytic activity towards the oxygen reduction reaction with onset and half-wave potentials of 0.918 and 0.822V, respectively, and a current density of 4.38mAcm(-2) at 0.565V vs. RHE. Furthermore, it presented high durability and strong methanol tolerance, revealing its great potential for applications in energy conversion.