Abstract: A resin composition contains a polyphenylene ether compound, a styrene block copolymer, a polybutadiene compound, and a curing agent. The polyphenylene ether compound has, in a molecule thereof, at least one of a group expressed by formula (1) or a group expressed by formula (2). The polybutadiene compound has an epoxy group in a molecule thereof. The curing agent contains an allyl compound expressed by formula (3). In the formula (1), p indicates an integer from 0 to 10, Z indicates an arylene group, and R1 to R3 each independently indicate either a hydrogen atom or an alkyl group. In the formula (2), R4 indicates either a hydrogen atom or an alkyl group. In the formula (3), RA indicates either an alkyl group or an alkenyl group, each having 8 to 22 carbon atoms.

Abstract: A resin composition contains a polyphenylene ether compound, a styrene block copolymer, a polybutadiene compound, and a curing agent. The polyphenylene ether compound has, in a molecule thereof, at least one of a group expressed by formula (1) or a group expressed by formula (2). The polybutadiene compound has an epoxy group in a molecule thereof. The curing agent contains an allyl compound expressed by formula (3). In the formula (1), p indicates an integer from 0 to 10, Z indicates an arylene group, and R1 to R3 each independently indicate either a hydrogen atom or an alkyl group. In the formula (2), R4 indicates either a hydrogen atom or an alkyl group. In the formula (3), RA indicates either an alkyl group or an alkenyl group, each having 8 to 22 carbon atoms.

Abstract: A platinum core-shell catalyst that uses palladium (Pd) as a core metal, or a platinum catalyst containing platinum and a metal besides platinum is manufactured industrially on a mass scale. The platinum catalyst is supported on carbon and has excellent oxygen reduction activity. The platinum catalyst is made for a fuel cell by bringing about the presence of a chemical species imparting higher potential than the initial oxide formation potential of the platinum of the platinum catalyst, and by bringing about the presence of a chemical species imparting lower potential than the initial oxide formation potential of the platinum of the platinum catalyst. The manufacture is carried out in a dispersion solution of the platinum catalyst dispersed in an acidic solution containing protons.

Abstract: A platinum core-shell catalyst that uses palladium (Pd) as a core metal, or a platinum catalyst containing platinum and a metal besides platinum is manufactured industrially on a mass scale. The platinum catalyst is supported on carbon and has excellent oxygen reduction activity. The platinum catalyst is made for a fuel cell by bringing about the presence of a chemical species imparting higher potential than the initial oxide formation potential of the platinum of the platinum catalyst, and by bringing about the presence of a chemical species imparting lower potential than the initial oxide formation potential of the platinum of the platinum catalyst. The manufacture is carried out in a dispersion solution of the platinum catalyst dispersed in an acidic solution containing protons.