Method to retard catalyst recrystallization

Details Method to retard catalyst recrystallization Method to retard catalyst recrystallization

1988-08-08

1990-06-26

Konopka, Paul E.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Inorganic carbon containing

427115, 429 40, 429 44, 502101, B01J 2364, B01J 2342, H01M 488, H01M 486

Patent

active

049372203

ABSTRACT:
The rate of noble metal crystallite recrystallization on a carbon-supported noble metal catalyst is reduced by dispersing two or more different kinds of noble metal-containing crystallites onto the surface of the carbon support. The crystallites have either different unit cell configurations or different unit cell sizes. The reduced rate of noble metal crystallite recrystallization results, over a period of time, in higher crystallite surface area and therefore, better catalyst performance compared to conventional carbon-supported noble metal catalysts. Fuel cells which incorporate such improved catalysts as cathode catalysts are capable of operating at maximum power production for longer periods of time than fuel cells which use conventional catalysts as cathode catalysts.

REFERENCES:
patent: 3352938 (1967-11-01), Plonsker et al.
patent: 3440107 (1969-04-01), Barber
patent: 3470019 (1969-09-01), Steele
patent: 3532556 (1970-10-01), Steele
patent: 3857737 (1974-12-01), Kemp et al.
patent: 4028274 (1977-06-01), Kunz
patent: 4137372 (1979-01-01), Jalan et al.
patent: 4137373 (1979-01-01), Jalan et al.
patent: 4186110 (1980-01-01), Jalan et al.
patent: 4202934 (1980-05-01), Jalan
patent: 4316944 (1982-02-01), Landsman et al.
patent: 4394299 (1983-07-01), Puskas et al.
patent: 4430391 (1984-02-01), Ovshinsky et al.
patent: 4447506 (1984-05-01), Luczak et al.
patent: 4607272 (1986-08-01), Osbourn
patent: 4716087 (1987-12-01), Ito et al.

Affiliated with

Also associated with

Rating

Method to retard catalyst recrystallization does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method to retard catalyst recrystallization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method to retard catalyst recrystallization will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1125590