Highly Porous Carbon Derived from MOF-5 as a Support of ORR Electrocatalysts for Fuel Cells

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• 作者：Inayat Ali Khan ; Yuhong Qian ; Amin Badshah ; Muhammad Arif Nadeem ; Dan Zhao
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：July 13, 2016
• 年：2016
• 卷：8
• 期：27
• 页码：17268-17275
• 全文大小：492K
• 年卷期：0
• ISSN：1944-8252

文摘

The development of highly competent electrocatalysts for the sluggish oxygen reduction reaction (ORR) at cathodes of proton-exchange membrane fuel cells (PEMFCs) is extremely important for their long-term operation and wide applications. Herein, we present highly efficient ORR electrocatalysts based on Pt/Ni bimetallic nanoparticles dispersed on highly porous carbon obtained via pyrolysis of a metal–organic framework MOF-5. In comparison to the commercial Pt/C (20%), the electrocatalyst Pt–Ni/PC 950 (15:15%) in this study exhibits a pronounced positive shift of 90 mV in E_onset. In addition, it also demonstrates excellent long-term stability and durability during the 500-cycle continue-oxygen-supply (COS) accelerating durability tests (ADTs). The significantly improved activity and stability of Pt–Ni/PC 950 (15:15%) can be attributed to the Pt electron interaction with Ni and carbon support as has been proved in X-ray and microscopic analysis.