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首页> 外文期刊>Electrocatalysis >Effect of Platinum Nanoparticle Loading on Oxygen Reduction at a Pt Nanocluster-Activated Microporous-Mesoporous Carbon Support
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Effect of Platinum Nanoparticle Loading on Oxygen Reduction at a Pt Nanocluster-Activated Microporous-Mesoporous Carbon Support

机译：铂纳米颗粒负载对Pt纳米簇活化的微孔-中孔碳载体上氧还原的影响

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摘要

Very high surface area carbon-supported Pt nanoparticle catalysts have been applied to the oxygen reduction reaction in alkaline solution. The distribution effect of deposited Pt nanoparticles onto the carbon support on the oxygen reduction reaction kinetics has been established by comparing the various carbon-supported Pt 920 and 60 wt% metal) catalysts. The various Pt catalysts were prepared by using a sodium borohydride reduction method. All the catalysts showed a face-centered cubic crystal structure as determined by X-ray diffraction method; the average platinum particle sizes were similar to 4.2, similar to 4.8, similar to 5.4, and similar to 27.2 nmfor 20 wt% Pt-C(Mo2C), 60 wt% Pt-C(Mo2C)-I, 60 wt% Pt-Vulcan XC72, and 60wt% Pt-C(Mo2C)-II catalysts, respectively. The X-ray photoelectron spectra for all the catalysts indicated that most of the platinum nanoparticles have an oxidation state of 0. The low-temperature N-2 sorption, time-offlight mass spectrometry, scanning electron microscopy, and transmission electron microscopy experiments have been carried out to characterize the structure of prepared materials. The cyclic voltammetry and rotating disk electrode techniques were used to study the oxygen electroreduction kinetics.
机译：极高表面积的碳载Pt纳米颗粒催化剂已应用于碱性溶液中的氧还原反应。通过比较各种碳载Pt 920和60 wt％金属催化剂，已经确定了沉积的Pt纳米颗粒在碳载体上对氧还原反应动力学的分布效果。通过使用硼氢化钠还原法来制备各种Pt催化剂。通过X射线衍射法测定，所有催化剂均表现出面心立方晶体结构。对于20 wt％的Pt-C（Mo2C），60 wt％的Pt-C（Mo2C）-I，60 wt％的Pt-，铂的平均粒径类似于4.2，类似于4.8，类似于5.4和类似于27.2 nm。 Vulcan XC72和60wt％的Pt-C（Mo2C）-II催化剂。所有催化剂的X射线光电子能谱表明，大多数铂纳米粒子的氧化态为0。已经进行了低温N-2吸附，时间-离线质谱，扫描电子显微镜和透射电子显微镜实验。进行表征制备材料的结构。采用循环伏安法和转盘电极技术研究氧的电还原动力学。

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