Affiliation:
1. Shanghai Institute of Ceramics Chinese Institute of Sciences Shanghai 200050 P. R. China
2. Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 P. R. China
3. School of Physical Science and Technology Shanghai Tech University Shanghai 201210 P. R. China
4. Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou 310024 P. R. China
Abstract
AbstractMetal‐organic frameworks‐based electrocatalysts have been developed as highly desirable and promising candidates for catalyzing oxygen reduction reaction (ORR), which, however, usually need to be prepared at elevated temperatures and may suffer from the framework collapse in water environments, largely preventing its industrial application. Herein, this work demonstrates a facile low‐temperature ion exchange method to synthesize Mn and Fe co‐loaded Prussian blue analogues possessing core‐shell structured frameworks and favorable water‐tolerance. Among the catalysts prepared, the optimal HMPB‐2.6Mn shows a high ORR electrocatalytic performance featuring a half‐wave potential of 0.86 V and zinc‐air battery power density of 119 mW cm−2, as well as negligible degradation up to 60 h, which are comparable to commercial Pt/C. Such an excellent electrocatalytic performance is attributed to the special core‐shell‐like structure with Mn concentrated in outer shell, and the synergetic interactions between Mn and Fe, endowing HMPB−Mn with outstanding ORR activity and good stability.
Funder
National Natural Science Foundation of China
Subject
General Energy,General Materials Science,General Chemical Engineering,Environmental Chemistry