Methanol Electro-Oxidation in Alkaline on a Titanium Electrode Supporting Ni-P or Ni Deposits
S.G. Chen, Y. Xu, Z.D. Wei, L. Li, X.Q. Qi, L. Guo, W. Ding and M.R. Xia
Affiliation: The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
Keywords: Alkaline, electrocatalysis, methanol oxidation, Ni-P.
The methanol electro-oxidation in alkaline solution was studied on titanium electrode carrying Ni-P and Ni
deposits. The phosphorus in Ni-P makes the Ni-P deposits fine and fine, and leads to the Ni-P deposits with a high
specific surface area. Meanwhile, the weak binding between hydrogen and the Ni-P makes adsorbed hydrogen from
methanol dehydrogenation on Ni-P deposits more easily cleaned up and makes Ni-P deposits to release fresh surface for
the adsorption of other methanol molecules. The methanol electro-oxidation on Ni-P deposits just starts at the potential
that coincided with that; at which Ni(OH)2 on the surface of electrodes becomes NiOOH. However, on Ni deposits,
methanol oxidation is delayed behind the potential at which Ni(OH)2 is oxidized to NiOOH due to the hindrance of
strongly-absorbed hydrogen, which is thought to be desorbed at a bit more positive potential. Patents relevant o the topic
have been discussed.
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