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首页> 外文期刊>ACS applied materials & interfaces >In-Situ Platinum Deposition on Nitrogen-Doped Carbon Films as a Source of Catalytic Activity in a Hydrogen Evolution Reaction
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In-Situ Platinum Deposition on Nitrogen-Doped Carbon Films as a Source of Catalytic Activity in a Hydrogen Evolution Reaction

机译：氮掺杂碳膜上的原位铂沉积作为析氢反应中催化活性的来源

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Copolymer-templated nitrogen-doped carbon (CTNC) films deposited on glassy carbon were used as electrodes to study electrochemically driven hydrogen evolution reaction (HER) in 0.5 M H2SO4. The activity of these materials was extremely enhanced when a platinum counter electrode was used instead of a graphite rod and reached the level of commercial Pt/C electrodes. Postreaction scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) measurements of electrode surfaces revealed that incorporation of even extremely low amounts of Pt resulted in this considerable gain of HER activity. High resolution XPS analysis and density functional theory (DFT) calculations confirmed that pyridinic nitrogen atoms act as active sites for Pt coordination and deposition. The Pt can be incorporated in both molecular (Pt2+) and metallic (Pt-0) form. This study shows that great caution must be taken when designing metal-free HER catalysts based on N-doped carbons.
机译：沉积在玻璃碳上的共聚物模板的氮掺杂碳（CTNC）膜用作电极，以研究0.5 M H2SO4中的电化学驱动的析氢反应（HER）。当使用铂对电极代替石墨棒时，这些材料的活性大大提高，并达到了商用Pt / C电极的水平。电极表面的反应后扫描电子显微镜（SEM）和X射线光电子能谱（XPS）测量表明，即使加入极少量的Pt，也会显着提高HER活性。高分辨率XPS分析和密度泛函理论（DFT）计算证实，吡啶氮原子充当Pt配位和沉积的活性位点。 Pt可以分子（Pt2 +）和金属（Pt-0）形式结合。这项研究表明，在设计基于N掺杂碳的无金属HER催化剂时必须格外小心。

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