Title:
【発明の名称】ポリベタイン-安定化ナノサイズ白金粒子、その製造法及び燃料電池における電極触媒としてのその使用
Document Type and Number:
Japanese Patent JP2001525247
Kind Code:
A
Abstract:
Polybetaine-stabilized nanosize platinum particles, a process for preparing them and their use for electrocatalysts in fuel cellsSoluble nanosize particles which have a diameter of from 0.5 to 3 nm, preferably from 1 to 2 nm, comprise platinum alone or platinum and other metals of the platinum group and are embedded in a protective colloid which comprises polymeric betaines and can be degraded by hydrolysis. The betaine is preferably a carbobetaine of the formula -N+R1R2-(-CH2-)n-CO2-, a phosphobetaine of the formula -N+R1R2-(-CH2-)n-PO3- or, preferably, a sulfobetaine of the formula -N+R1R2-(-CH2-)n-SO3-, where R1 and R2 may, independently of one another, be identical or different and are alkyl radicals having from 1 to 6 carbon atoms and n is 1, 2 or 3. Also described are a process for preparing the nanosize particles and catalysts produced therefrom and also their use for fuel cells.
Inventors:
Bernzel, halalt
Dickers, gray gore
Frank, Georg
Miller, Hans
Zotkka-Gut, Thomas
Dickers, gray gore
Frank, Georg
Miller, Hans
Zotkka-Gut, Thomas
Application Number:
JP2000524074A
Publication Date:
December 11, 2001
Filing Date:
December 03, 1998
Export Citation:
Assignee:
Axeva Gamebha
International Classes:
B01J13/00; B01J31/06; B01J33/00; B01J35/00; B01J35/08; H01M4/92; H01M8/10; (IPC1-7): B01J35/08; B01J13/00; B01J31/06; B01J33/00; H01M4/92; H01M8/10
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)