Electrocatalytic oxidation of methanol on Pt catalyst supported on nitrogen-doped graphene induced by hydrazine reduction
Electrocatalytic oxidation of methanol on Pt catalyst supported on nitrogen-doped graphene induced by hydrazine reduction
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肼还原诱导氮掺杂石墨烯负载 Pt 催化剂电催化氧化甲醇
DOI：
10.1016/j.jpcs.2013.06.004
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发表时间：
2013-11
影响因子：
4
通讯作者：
Zongping Shao
中科院分区：
文献类型：
--
作者：
Yuanyuan Zhao;Yingke Zhou;Ryan O’Hayre;Zongping Shao
联氨通常用于还原氧化石墨烯(GO)以生成石墨烯。最近的观察表明，当使用联氨还原GO时，生成的还原石墨烯实际上包含一定量的氮掺杂，这可能会影响所获得材料的性能，在某些情况下可能会被用于有益的好处。在本工作中，我们用化学氧化法制备了氧化石墨烯，然后用肼和硼氢化钠(作为对照)将氧化石墨烯还原为石墨烯，并探索了肼还原引入的氮官能团的性质。然后在氮掺杂(肼还原)和未掺杂(对照)的石墨烯衬底上沉积了纳米铂，并对其形貌、结构和电催化甲醇氧化活性进行了表征和评价。结果表明，通过联氨还原引入到石墨烯中的含氮官能团大大提高了底层铂纳米粒子对甲醇氧化反应的电催化活性。
Hydrazine is often used to reduce graphene oxide (GO) to produce graphene. Recent observations suggested that when hydrazine is used to reduce GO, the resulting reduced graphene actually contains certain amounts of nitrogen dopants, which may influence the properties of the obtained material, and in some cases may be deployed for beneficial advantage. In this work, we prepared graphene oxide by the chemical oxidation method, then used either hydrazine or sodium borohydride (as a control) to reduce the graphene oxide to graphene and to explore the nature of the nitrogen functionalities introduced by hydrazine reduction. Pt nanoparticles were then deposited on the nitrogen doped (hydrazine-reduced) and undoped (control) graphene substrates, and the morphology, structure, and electrocatalytic methanol oxidation activity were characterized and evaluated. The results show that the nitrogen functional groups introduced into the graphene by hydrazine reduction greatly improve the electrocatalytic activity of the underlying Pt nanoparticles towards the methanol oxidation reaction.
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