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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Nitrogen Doped Reduced Graphene Oxide Based Pt-TiO2 Nanocomposites for Enhanced Hydrogen Evolution
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Nitrogen Doped Reduced Graphene Oxide Based Pt-TiO2 Nanocomposites for Enhanced Hydrogen Evolution

机译：氮掺杂还原氧化石墨烯基Pt-TiO2纳米复合材料促进氢的释放

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Electrochemical hydrogen production from water is an attractive clean energy generation process that has enormous potential for sustainable development. However, noble metal catalysts are most commonly used for such electrochemical hydrogen evolution making the process cost ineffective. Thereby design of hybrid catalysts with minimal use of noble metals using a suitable support material is a prime requirement for the electrolysis of water. Herein, we demonstrate the superior hydrogen evolution reaction (HER) activity of the platinum nanoparticles (Pt NPs) supported on faceted titanium dioxide (TiO2) nanocrystals (Pt-TiO2) and nitrogen doped reduced graphene oxide (N-rGO) based TiO2 nanocomposite (Pt-TiO2-N-rGO). The ternary Pt-TiO2-N-rGO nanocomposite exhibits a superior HER activity with a small Tafel slope (similar to 32 mV.dec(-1)), exchange current density (similar to 0.22 mA.cm(-2)), and excellent mass activity (similar to 3116 mA.mg(pt)(-1)) at 300 mV overpotential. These values are better/higher than that of several support materials investigated so far. The excellent HER activity of the ternary Pt-TiO2-N-rGO nanocomposite is ascribed to the presence of Ti(III) states and enhanced charge transportation properties of N-rGO. The present study is a step toward reliable electrochemical hydrogen production using faceted TiO2 nanocrystals as support material.
机译：从水产生电化学制氢是一种有吸引力的清洁能源生产过程，具有巨大的可持续发展潜力。然而，贵金属催化剂最常用于这种电化学放氢，这使得工艺成本无效。因此，使用合适的载体材料设计使用最少的贵金属的杂化催化剂是电解水的主要要求。在本文中，我们证明了多面二氧化钛（TiO2）纳米晶体（Pt-TiO2）和氮掺杂还原氧化石墨烯（N-rGO）基TiO2纳米复合材料上负载的铂纳米颗粒（Pt NPs）的优异的氢释放反应（HER）活性Pt-TiO2-N-rGO）。三元Pt-TiO2-N-rGO纳米复合材料表现出优异的HER活性，具有小的Tafel斜率（类似于32 mV.dec（-1）），交换电流密度（类似于0.22 mA.cm（-2））和在300 mV超电势下具有出色的质量活性（类似于3116 mA.mg（pt）（-1））。这些值比迄今为止研究的几种支持材料更好/更高。三元Pt-TiO2-N-rGO纳米复合材料的优异HER活性归因于Ti（III）态的存在和N-rGO增强的电荷传输性能。本研究是使用多面TiO2纳米晶体作为载体材料实现可靠的电化学制氢的一步。

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