C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
204/199, 252/52.
C25B 11/06 (2006.01) B01J 23/28 (2006.01) B01J 23/80 (2006.01) B01J 23/83 (2006.01) B01J 23/84 (2006.01) B01J 27/20 (2006.01) C25B 11/04 (2006.01)
Patent
CA 1214453
ABSTRACT A material for acting as a catalyst for hy- drogen evolution in an electrolytic cell is formed from a host matrix including at least one transi- tion element which is structurally modified by incorporating one or more modifier elements at least one of which is a transition element to improve its catalytic properties The utilization of a disordered material, which can be any of a number of different disordered structures, makes possible the modification of local order chemical environments of the material to create catalytical active sites for the hydrogen evolution reaction. Modifier elements, including for example Ti, Mo, Sr, Si, La, Ce, O and Co, structurally modify the local chemical environments of the host matrix formed of a transition element such as Ni, Mo, or Co to provide a material having an increased den- sity of catalytically active sites which exhibits low overvoltages when utilized as a catalytic material for a electrolyte cell cathode. The material may also include a leachable modifier element, such as Al or Zn, which is partially removed to further modify the material and enhance its catalytic activity. The catalytic material can be formed by vacuum deposition techniques such as by cosputtering the host matrix and modifier elements to form a layer of catalytic material on an electrode substrate.
431802
Ovshinsky Stanford R.
Sapru Krishna
Yee Edmund L.
Energy Conversion Devices Inc.
Macrae & Co.
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