WO2007105576-A2  K. KINOSHITA: "Particle size effects for oxygen reduction on highly dispersed platinum in acid electrolytes h" J. ELECTROCHEM. SOC., vol. 137, March 1990 (1990-03), pages 845-848, XP002448448;  R.S. WEBER, M. PEUCKERT, R.A. DALLABETTA, M. BOUDART: "Oxygen reduction on small platinum particles" J. ELECTROCHEM. SOC., vol. 133, October 1988 (1988-10), pages 2535-2538, XP002448449;  YOSHITAKE T ET AL: "Preparation of fine platinum catalyst supported on single-wall carbon nanohorns for fuel cell application" PHYSICA B. CONDENSED MATTER, AMSTERDAM, NL, vol. 323, 2002, pages 124-126, XP002433413 ISSN: 0921-4526;  LI X ET AL: "Microwave polyol synthesis of Pt/CNTs catalysts: Effects of pH on particle size and electrocatalytic activity for methanol electrooxidization" CARBON, XX, XX, vol. 43, no. 10, August 2005 (2005-08), pages 2168-2174, XP004982142 ISSN: 0008-6223WO2007105576-A3  LI X ET AL: "Microwave polyol synthesis of Pt/CNTs catalysts: Effects of pH on particle size and electrocatalytic activity for methanol electrooxidization" CARBON, XX, XX, vol. 43, no. 10, August 2005 (2005-08), pages 2168-2174, XP004982142 ISSN: 0008-6223;  K. KINOSHITA: "Particle size effects for oxygen reduction on highly dispersed platinum in acid electrolytes h" J. ELECTROCHEM. SOC., vol. 137, March 1990 (1990-03), pages 845-848, XP002448448;  R.S. WEBER, M. PEUCKERT, R.A. DALLABETTA, M. BOUDART: "Oxygen reduction on small platinum particles" J. ELECTROCHEM. SOC., vol. 133, October 1988 (1988-10), pages 2535-2538, XP002448449;  YOSHITAKE T ET AL: "Preparation of fine platinum catalyst supported on single-wall carbon nanohorns for fuel cell application" PHYSICA B. CONDENSED MATTER, AMSTERDAM, NL, vol. 323, 2002, pages 124-126, XP002433413 ISSN: 0921-4526;  LI X ET AL: "Microwave polyol synthesis of Pt/CNTs catalysts: Effects of pH on particle size and electrocatalytic activity for methanol electrooxidization", CARBON, XX, XX, vol. 43, no. 10, August 2005 (2005-08-01), pages 2168 - 2174, XP004982142, ISSN: 0008-6223;  K. KINOSHITA: "Particle size effects for oxygen reduction on highly dispersed platinum in acid electrolytes h", J. ELECTROCHEM. SOC., vol. 137, March 1990 (1990-03-01), pages 845 - 848, XP002448448;  R.S. WEBER, M. PEUCKERT, R.A. DALLABETTA, M. BOUDART: "Oxygen reduction on small platinum particles", J. ELECTROCHEM. SOC., vol. 133, October 1988 (1988-10-01), pages 2535 - 2538, XP002448449;  YOSHITAKE T ET AL: "Preparation of fine platinum catalyst supported on single-wall carbon nanohorns for fuel cell application", PHYSICA B. CONDENSED MATTER, AMSTERDAM, NL, vol. 323, 2002, pages 124 - 126, XP002433413, ISSN: 0921-4526