Title: Synthesis of nitrogen-doped reduced graphene oxide as metal-free electrocatalyst for oxygen reduction reactions
Authors: Xiaoyang Cui; Shubin Yang; Pulickel M. Ajayan; Zhengjun Zhang
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Key Laboratory of Aerospace Advanced Materials and Performance of Ministry of Education, School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
Department of Materials Science and Nano Engineering, Rice University, Houston, TX, 77005, USA
Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Abstract: Developing high performance and low cost electrocatalyst for oxygen reduction reactions (ORR) is pivotal for the commercial viability of fuel cells. In this context, great effort has been devoted to developing non-precious metal catalysts or even metal-free catalysts for ORR. Here, we successfully prepared nitrogen-doped reduced graphene oxide (NRGO) with high surface area via KOH activation, followed by thermal treatment under ammonia gas for the incorporation of nitrogen into the carbon lattice. The NRGO catalyst exhibited high electrocatalytic activity towards ORR as compared to commercial Pt/C catalyst, suggesting that it might be possible to develop NRGO into a cost-effective and highly active catalyst, as an alternative to the Pt-based catalysts.
Keywords: nitrogen doped graphene; reduced graphene oxide; RGO; oxygen reduction reaction; ORR; metal-free electrocatalysts; fuel cells; catalysts.
Int. J. of Nanomanufacturing, 2016 Vol.12, No.3/4, pp.252 - 263
Submission date: 28 Jun 2015
Date of acceptance: 04 Jan 2016
Available online: 20 Sep 2016