Multigrain platinum nanowires consisting of oriented nanoparticles anchored on sulfur-doped graphene as a highly active and durable oxygen reduction electrocatalyst.

Hoque, Md Ariful; Hassan, Fathy M; Higgins, Drew; Choi, Ja-Yeon; Pritzker, Mark; Knights, Shanna; Ye, Siyu; Chen, Zhongwei · Adv Mater · 2015

basic_science · Level V

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Abstract

Direct growth of multigrain platinum nanowires on sulfur-doped graphene (PtNW/SG) is reported. The growth mechanism, including Pt nanoparticle nucleation on SG, followed by nanoparticle attachment with orientation along the <111> direction is highlighted. PtNW/SG demonstrates improved Pt mass and specific activity compared with commercial catalysts toward oxygen reduction, in addition to dramatically improved stability through accelerated durability testing.