US 11,990,627 B2
Carrier metal catalyst, manufacturing method thereof, and fuel cell
Katsuyoshi Kakinuma, Yamanashi (JP); Makoto Uchida, Yamanashi (JP); and Akihiro Iiyama, Yamanashi (JP)
Assigned to UNIVERSITY OF YAMANASHI, Yamanashi (JP)
Filed by UNIVERSITY OF YAMANASHI, Yamanashi (JP)
Filed on Oct. 17, 2022, as Appl. No. 17/967,180.
Application 17/967,180 is a continuation of application No. 16/774,242, filed on Jan. 28, 2020, granted, now 11,502,309.
Claims priority of application No. 2019-013778 (JP), filed on Jan. 30, 2019.
Prior Publication US 2023/0049745 A1, Feb. 16, 2023
Int. Cl. H01M 4/92 (2006.01); H01M 8/1004 (2016.01)
CPC H01M 4/925 (2013.01) [H01M 8/1004 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A method for manufacturing a carrier metal catalyst, comprising:
a supporting step including an adsorption step and a heat treatment step;
the adsorption step includes allowing metal colloidal particles to be adsorped on a carrier powder;
a metal of the metal colloidal particles includes platinum;
the carrier powder is an aggregate of carrier fine particles;
the carrier fine particles include a chained portion structured by a plurality of crystallites being fusion bonded to form a chain;
the carrier fine particles include titanium oxide;
the carrier fine particles are doped with an element having a valence different from a valence of titanium;
the titanium oxide of the carrier powder has an anatase phase/rutile phase ratio of 0.2 or lower; and
the heat treatment step includes performing a heat treatment at 920 to 1100° C. after the adsorption step to convert the metal colloidal particle into the metal fine particles.