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首页> 外文会议>Physical and Analytical Electrochemistry (General) - 224th ECS Meeting >Enhancement of electrocatalytic activity of novel ruthenium based nanocatalyst supported on nitrogen doped carbons for oxygen reduction
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Enhancement of electrocatalytic activity of novel ruthenium based nanocatalyst supported on nitrogen doped carbons for oxygen reduction

机译：氮掺杂碳负载的新型钌基纳米催化剂的电催化活性增强

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Herein, ruthenium nanoparticles modified with mixed selenium and nitrogen overlayers (RuSe_xN_y) were prepared via chelatation method onto the N-doped and undoped carbons (Norit and MWCNTs) under analogous experimental conditions. The crystalographic data reveals the same type of crystallographic phases in RuSe_xN_y crystallites, regardless of the doping of carbon support, nevertheless, as transmission electron microscopy measurements shows the nanoparticles fabricated onto the N-doped carbons are of smaller diameters. The studies of oxygen reduction reaction in acid (0.5 M H_2SO_4) medium using rotating ring disk voltammetry and impedance spectroscopy show that RuSe_xN_y nanoparticles supported on the N-doped carbons exhibit higher ORR catalytic activity with generation of lower amounts of hydrogen peroxide. The spillover effect due to N- doping of carbon support was suggested to be responsible for improved decomposition of adsorbed ORR intermediates in carbon supported RuSe_xN_y materials.
机译：在此，在类似的实验条件下，通过螯合法将掺有硒和氮的混合态钌（RuSe_xN_y）改性的钌纳米颗粒制备到掺N和不掺N的碳（Norit和MWCNT）上。晶体学数据揭示了RuSe_xN_y微晶中相同类型的晶体学相，无论碳载体的掺杂如何，但是，因为透射电子显微镜测量表明，在N掺杂的碳上制造的纳米颗粒的直径较小。使用旋转环盘伏安法和阻抗谱研究了在酸性（0.5 M H_2SO_4）介质中的氧还原反应，结果表明，负载在N掺杂碳上的RuSe_xN_y纳米颗粒表现出较高的ORR催化活性，并生成较少量的过氧化氢。有人提出，由于碳载体的N掺杂而导致的溢出效应，是碳载体RuSe_xN_y材料中吸附的ORR中间体分解性能提高的原因。

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