Stock material or miscellaneous articles – All metal or with adjacent metals – Surface feature
Patent
1986-08-04
1988-09-13
Rutledge, L. Dewayne
Stock material or miscellaneous articles
All metal or with adjacent metals
Surface feature
204293, 148403, C22C 504
Patent
active
047709499
ABSTRACT:
Electrode materials and method for their surface activation are described. Alloys consisting of at least one element of the group consisting of Nb, Ta, Ti and Zr, at least one element of the group consisting of Ru, Rh, Pd, Ir and Pt, and balance being Ni are prepared by methods for preparation of amorphous alloys, and are amorphous or supersaturated solid solution. Their surfaces are activated to enhance electrocatalytic activity by enrichment of electrocatalytically active platinum group elements in the surface region in addition to surface roughening as a result of selective dissolution of Ni, Nb, Ta, Ti and Zr from the alloys during immersion in corrosive solutions. The surface-activated amorphous and supersaturated solid solution alloys possess high electrocatalytic activity and selectivity for a specific reaction as well as high corrosion resistance.
REFERENCES:
patent: 4339270 (1982-07-01), Hashimoto et al.
patent: 4560454 (1985-12-01), Harris et al.
patent: 4609442 (1986-09-01), Tenhover et al.
Asami Katsuhiko
Hashimoto Koji
Kawashima Asahi
Kumagai Naokazu
Daiki Engineering Co., Ltd.
Hashimoto Koji
Kastler S.
Rutledge L. Dewayne
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