Facile synthesis of boron and nitrogen-dual-doped graphene sheets anchored platinum nanoparticles for oxygen reduction reaction

摘要

Boron and nitrogen-dual-doped graphene sheets (BNG) has been conveniently synthesized by a novel strategy, including one-step pyrolysis of nitrogen and boron-containing borane-tert-butylamine complex impregnated with cobalt ions. The BNG with a relatively high boron and nitrogen-doping level is used it as Pt support for oxygen reduction reaction for the first time. An excellent electron-donating of BNG to Pt that facilitates the reduction of O-2 and strengthens BNG/Pt interaction has been evidenced. The novel Pt/BNG catalyst exhibits highly improved electrocatalytic activity and stability compared with commercial Pt/C. In O-2-saturated 0.1 M HClO4, the Pt/BNG catalyst shows a mass activity of 213.6 mA mg(Pt)(-1) at 0.9 V vs. RHE, which is nearly three times as high as that of commercial Pt/C. In addition, the Pt/BNG catalyst displays much higher stability than Pt/C in continuous potential cycling tests. (C) 2016 Elsevier Ltd. All rights reserved.