Low Density Three-Dimensional Metal Foams as Significant Electrocatalysts toward Methanol Oxidation Reaction
Low Density Three-Dimensional Metal Foams as Significant Electrocatalysts toward Methanol Oxidation Reaction
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DOI：
10.1021/acssuschemeng.7b03480
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发表时间：
2018-01
影响因子：
8.4
通讯作者：
Divya C. Sesu;Indrajit M. Patil;Moorthi Lokanathan;Haridas B. Parse;Phiralang Marbaniang;B. Kakade
中科院分区：
文献类型：
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作者：
Divya C. Sesu;Indrajit M. Patil;Moorthi Lokanathan;Haridas B. Parse;Phiralang Marbaniang;B. Kakade
过渡金属是甲醇氧化反应的高活性催化剂。低密度泡沫金属材料的发展具有广泛的应用前景。在这里，我们报告了一个系统的设计三维（3D）多孔纳米复合材料（泡沫）的过渡金属，如铜和镍与还原氧化石墨（Cu-Ni@rGO）使用简单的自蔓延燃烧方法，其中Cu-Ni泡沫结构包裹在还原氧化石墨。场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）显示纳米孔结构形态。X射线光电子能谱（XPS）和X射线衍射（XRD）分别显示了不同氧化态的金属离子和相形成的存在。Cu-Ni@rGO纳米复合材料的电化学研究显示出有趣的甲醇电氧化性能，其激发电流密度为280 mA/cm 2，即使在600 s后仍保持95%的活性。此外，这些Cu-Ni@r.
Transition metals have emerged as highly active catalysts for methanol oxidation reaction. The development of low-density metallic foams is exceedingly intriguing for various applications. Here, we report a systematic design of three-dimensional (3D) porous nanocomposites (foam) of transition metals like Cu and Ni with reduced graphite oxide (Cu–Ni@rGO) using simple self-propagation combustion method, where Cu–Ni foam structures are wrapped around reduced graphite oxide. The field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) show nanoporous structural morphology. X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) show presence of different oxidation states of metal ions and phase formation, respectively. The electrochemical studies of Cu–Ni@rGO nanocomposites exhibit interesting methanol electrooxidation properties with exciting current density of 280 mA/cm2, which further retain 95% of their activity even after 600 s. In addition, these, Cu–Ni@r...