期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 26, 页码 22023-22030出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b03742
关键词
lanthanide metal-organic framework; synergistic catalysts; oxygen reduction reaction; La-doped ceria; N-doped porous carbon
资金
- National Natural Science Foundation of China [21231002, 21371029, 21671033, 21571030, 91622108]
- Open Research Fund of the State Key Laboratory of Inorganic Synthesis and Preparative Chemistry (Jilin University) [2015-01]
Oxygen reduction reaction underpins the development of the whole fuel-cell field, where there is a strong impetus to develop efficient and stable catalysts that can replace the precious metal Pt/C. Herein, a series of excellent catalysts for ORR derived from Ce/La dual lanthanide metal-organic framework with functional Lewisbasic sites were synthesized for the first time. The synergistic effect of high concentration of oxygen vacancies from La-embedded CeO2 and Fe-N-x sites as well as porous structure endows the catalyst superior performance to Pt/C, with a half-wave potential (E-1/2) of 0.870 V and a current density (j) of 5.43 mA/cm(2). Furthermore, the catalysts are also effective for other nonelectrocatalytic reactions. It is expected that this research will contribute to synthesis of an excellent nonplatinum electrocatalyst for fuel-cell applications, and the oxygen vacancies stabilized in carbon matrix offer a method for versatile catalyst design for other reactions.
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