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Effect of Co‐Ni Ratio in Graphene Based Bimetallic Electro‐catalyst for Methanol Oxidation
Author(s) -
Sarwar E.,
Noor T.,
Iqbal N.,
Mehmood Y.,
Ahmed S.,
Mehek R.
Publication year - 2018
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201700143
Subject(s) - bimetallic strip , catalysis , graphene , methanol , cyclic voltammetry , materials science , scanning electron microscope , inorganic chemistry , chemical engineering , electrochemistry , nuclear chemistry , electrode , chemistry , nanotechnology , composite material , organic chemistry , engineering
In this paper the electro‐catalytic oxidation of methanol is studied on the non‐noble catalysts Ni–Co/graphene. The bimetallic electro‐catalyst was prepared with different Co–Ni ratios by using simple solution synthesis method. The synthesized materials were characterized by X‐ray diffraction (XRD) and scanning electron microscopy (SEM) for their structure and morphological changes. The electro‐catalytic activity of Ni–Co/graphene for methanol oxidation was investigated by cyclic voltammetry (CV) on glass carbon electrode (GCE) in alkaline medium with 1M methanol solution. The results of various electro‐catalysts have shown significant electro‐oxidation towards methanol. Increasing the Ni concentration in catalyst has promoted the oxidation reaction at the Co–Ni/graphene catalyst. This study reveals that the low‐cost electro‐catalyst Ni–Co/graphene has great potential for DMFC applications.