Highly Porous Carbon Derived from MOF-5 as a Support of ORR Electrocatalysts for Fuel Cells.
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 Eonset. 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.
Department of Chemical & Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, Singapore 117585, Singapore.|Catalysis and Nanomaterials Lab 27, Department of Chemistry, Quaid-i-Azam University , Islamabad 45320, Pakistan.
Inayat Ali
IA
Khan
Department of Chemical & Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, Singapore 117585, Singapore.
Yuhong
Y
Qian
Catalysis and Nanomaterials Lab 27, Department of Chemistry, Quaid-i-Azam University , Islamabad 45320, Pakistan.
Amin
A
Badshah
Catalysis and Nanomaterials Lab 27, Department of Chemistry, Quaid-i-Azam University , Islamabad 45320, Pakistan.
Muhammad Arif
MA
Nadeem
Department of Chemical & Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, Singapore 117585, Singapore.
Dan
D
Zhao
bimetallic nanoparticles; electrocatalysts; fuel cells; metal−organic frameworks; oxygen reduction reaction