期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 24, 页码 15250-15257出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b02630
关键词
fuel cells; metal-organic coordination materials; oxygen reduction; prussian blue; platinum; synergy
资金
- National Natural Science Foundation of China [21276058, 21433003, 21376057]
- State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) [2014DX10]
- China Scholarship Council
Oxygen reduction reaction (ORR) is the cornerstone in the electrochemical energy conversion devices such as fuel cells and metal air batteries. It remains a great challenge to develop the ORR electrocatalysts with fast kinetics and high durability. Herein, we report the synthesis of a novel metal organic coordination networks material, prussian blue crystalline nanograins mosaicked within amorphous membrane (PB CNG-M-AM). Such unique PB CNG-M-AM is designed to enhance the electrocatalysis of Pt toward the ORR by the electrostatic self-assembly. Thus, obtained Pt-PB/C catalysts form numerous Pt-PB-gas threephase boundaries and present rather high intrinsic activity, four-electron selectivity and superior stability. Moreover, a completely new synergetic mechanism between PB and Pt is discovered, which delicately alters the ORR route and significantly enhances the ORR kinetics. This work provides not only a new strategy and mechanism for developing highly efficient ORR electrocatalysts, but also an alternative way to utilize metal organic coordination networks materials.
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