C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
204/199, 252/52.
C25B 11/06 (2006.01) B01J 23/76 (2006.01) C25B 11/04 (2006.01)
Patent
CA 1214452
ABSTRACT An improved anode for acting as a catalyst for the oxygen evolution reaction in water elec- trolysis. The anode provides lower overvoltages, good kinetics, chemical and mechanical stability, low heat of oxygen adsorption and low operating costs. The anode material is formed from a host matrix including at least one transition element, preferably Co, Ni or Mn, which is structurally modified by incorporating one or more modifier elements, one of which may also be a transition element, to improve its catalytic properties. Modifier elements, including for example Co, Ni, Sr, Li, In, K, Sn, C, O, Mn, Ru and Al struc- turally modify the local chemical environments of the host matrix to provide a material having an increased density of catalytically active sites. The catalytic material can be formed by vacuum de- position techniques such as by cosputtering the host matrix and modifier elements to form a layer of catalytic material on an electrode substrate. The material may also include a leachable modifier element, such as Li, Al or Zn, which is partially removed to further modify the material and enhance its catalytic activity. After formation, the material may be subjected to a heat treatment in
431801
Liang Gao
Ovshinsky Stanford R.
Sapru Krishna
Energy Conversion Devices Inc.
Macrae & Co.
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