US 11,955,646 B2
Ultrathin electrochemical catalysts on catalyst support for proton exchange membrane fuel cells
Friedrich B. Prinz, Stanford, CA (US); Thomas Jaramillo, Stanford, CA (US); Drew C. Higgins, Stanford, CA (US); Yongmin Kim, Stanford, CA (US); Shicheng Xu, Stanford, CA (US); Thomas Schladt, Wolfsburg (DE); and Tanja Graf, Wolfsburg (DE)
Assigned to The Board of Trustees of the Leland Stanford Junior University, Stanford, CA (US); and Volkswagen Aktiengesellschaft, Wolfsburg (DE)
Appl. No. 16/761,740
Filed by The Board of Trustees of the Leland Stanford Junior University, Stanford, CA (US); and Volkswagen Aktiengesellschaft, Wolfsburg (DE)
PCT Filed Nov. 7, 2018, PCT No. PCT/US2018/059672
§ 371(c)(1), (2) Date May 5, 2020,
PCT Pub. No. WO2019/094501, PCT Pub. Date May 16, 2019.
Claims priority of provisional application 62/583,973, filed on Nov. 9, 2017.
Prior Publication US 2020/0343563 A1, Oct. 29, 2020
Int. Cl. H01M 4/92 (2006.01); H01M 4/86 (2006.01); H01M 8/10 (2016.01); H01M 8/1004 (2016.01)
CPC H01M 4/926 (2013.01) [H01M 4/8657 (2013.01); H01M 8/1004 (2013.01); H01M 2008/1095 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A supported catalyst comprising:
a catalyst support, wherein the catalyst support is a carbonaceous support; and
deposits of a catalyst directly deposited on the catalyst support, covering the catalyst support and in contact with the catalyst support,
wherein the deposits have an average thickness of 2 nm or less, and the deposits are spaced apart from one another on the support,
wherein an average edge-to-edge distance exposing the support between nearest neighboring deposits is 0.2 nm to 10 nm;
wherein an average aspect ratio, in terms of a ratio of a lateral size to a thickness, of the deposits is greater than 2; and
wherein an average lateral size of the deposits is 20 nm or less.