Methanol electrocatalytic oxidation on Pt nanoparticles on nitrogen doped graphene prepared by the hydrothermal reaction of graphene oxide with urea
Methanol electrocatalytic oxidation on Pt nanoparticles on nitrogen doped graphene prepared by the hydrothermal reaction of graphene oxide with urea
复制标题
氧化石墨烯与尿素水热反应制备氮掺杂石墨烯上 Pt 纳米粒子的甲醇电催化氧化
DOI：
10.1016/j.electacta.2013.09.038
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发表时间：
2013-12
影响因子：
6.6
通讯作者：
Yawei Li
中科院分区：
文献类型：
--
作者：
Xiao Xu;Yingke Zhou;Tao Yuan;Yawei Li
利用氧化石墨烯与尿素的水热反应制备氮掺杂石墨烯，并通过nabh4还原途径将Pt纳米颗粒沉积在氮掺杂石墨烯上。利用透射电子显微镜、x射线粉末衍射和x射线光电子能谱对合成催化剂的形貌和微观结构进行了表征，利用傅里叶变换红外光谱和紫外-可见吸收光谱对催化剂表面的官能团进行了研究。采用循环伏安法、计时安培法和电化学阻抗法对氮掺杂石墨烯负载Pt催化剂的甲醇电催化氧化活性和耐久性进行了评价。结果表明：通过简单的水热反应，氮掺杂和氧化石墨烯的还原同时实现，这对Pt纳米粒子的沉积过程和电催化活性都有有利的影响。在掺杂氮的石墨烯衬底上负载的Pt催化剂具有优异的甲醇氧化活性和耐久性，在直接甲醇燃料电池中具有广阔的应用前景。
A facile hydrothermal reaction of graphene oxide with urea was used to produce nitrogen doped graphene, and Pt nanoparticles were deposited on the obtained nitrogen doped graphene by the NaBH4reduction route. The morphology and microstructure of the synthesized catalysts were characterized by transmission electron microscopy, X-ray powder diffraction and X-ray photoelectron spectroscopy, while the functional groups on the surface of the catalysts were investigated by the Fourier transform infrared spectroscopy and ultraviolet-visible absorption spectra. Cyclic voltammetry, chronoamperometry and electrochemical impedance techniques were carried out to evaluate the methanol electrocatalytic oxidation activity and durability of Pt catalysts supported on the nitrogen doped graphene. The results showed that nitrogen doping and reduction of GO were achieved simultaneously by the facile hydrothermal reaction, which had beneficial effects for the deposition process and electrocatalytic activity of Pt nanoparticles. The Pt catalysts supported on the nitrogen doped graphene substrate presented excellent activity and durability of methanol oxidation reaction, which might be promising for application in direct methanol fuel cells.
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