Affiliation:
1. Key Laboratory of Textile Science & Technology Ministry of Education College of Textiles Donghua University Shanghai 201620 China
2. Department of Materials Science and Engineering National University of Singapore Singapore 117574 Singapore
Abstract
AbstractThe emerging transition metal‐nitrogen‐carbon (MNC) materials are considered as a promising oxygen reduction reaction (ORR) catalyst system to substitute expensive Pt/C catalysts due to their high surface area and potential high catalytic activity. However, MNC catalysts are easy to be attacked by the ORR byproducts that easily lead to the deactivation of metal active sites. Moreover, a high metal loading affects the mass transfer and stability, but a low loading delivers inferior catalytic activity. Here, a new strategy of designing ZrO2 quantum dots and N‐complex as dual chemical ligands in N‐doped bubble‐like porous carbon nanofibers (N‐BPCNFs) to stabilize copper (Cu) by forming CuZrO3‐x/ZrO2 heterostructures and CuN ligands with a high loading of 40.5 wt.% is reported. While the highly porous architecture design of N‐BPCNFs builds a large solidelectrolytegas phase interface and promotes mass transfer. The preliminary results show that the half‐wave potential of the catalyst reaches 0.856 V, and only decreases 0.026 V after 10 000 cycles, exhibiting excellent stability. The proposed strategy of stabilizing metal active sites with both heterostructures and CuN ligands is feasible and scalable for developing high metal loading ORR catalyst.
Funder
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
7 articles.
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