Simple preparation of nanoporous few-layer nitrogen-doped graphene for use as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions
Simple preparation of nanoporous few-layer nitrogen-doped graphene for use as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions
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DOI：
10.1016/j.carbon.2012.10.039
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发表时间：
2013-03-01
期刊：
影响因子：
10.9
通讯作者：
Wong, Ching-ping
中科院分区：
文献类型：
--
作者：
Lin, Ziyin;Waller, Gordon H.;Wong, Ching-ping
以氧化石墨烯和聚苯胺为N源，通过简单热解法制备氮掺杂石墨烯（NG）。生成的NG包含2.4 at。% N，其中高达1.2 at。电化学表征表明，NG在碱性电解质中对氧还原反应（ORR）具有优异的催化活性，包括理想的四电子生成水的途径、大的动力学限制电流密度、长期稳定性和良好的耐甲醇交叉性。此外，我们还证明了NG对析氧反应（OER）也有很高的催化活性，这表明它作为ORR和OER的双功能催化剂具有潜在的应用前景。(C) 2012 Elsevier Ltd.版权所有。
We prepared nitrogen-doped graphene (NG) by simple pyrolysis of graphene oxide and polyaniline, which was selected as the N source. The resulting NG contains 2.4 at.% N, of which as high as 1.2 at.% is quaternary N. Electrochemical characterizations reveal that the NG has excellent catalytic activity toward oxygen reduction reaction (ORR) in an alkaline electrolyte, including a desirable four-electron pathway for the formation of water, large kinetic-limiting current density, long-term stability and good tolerance to methanol crossover. In addition, we demonstrate that the NG also has high catalytic activity toward oxygen evolution reaction (OER), rendering its potential application as a bi-functional catalyst for both ORR and OER. (C) 2012 Elsevier Ltd. All rights reserved.