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Electrochemical Behavior of Organics Oxidation on Palladium-Based Nanocatalysts Synthesized from Bromide Anion Exchange

机译:溴化物阴离子交换合成钯基纳米催化剂上有机物氧化的电化学行为

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摘要

Palladium-based and gold nanomaterials were synthesized by the so-called "Bromide Anion Exchange" method. This soft and clean synthetic route leads to well dispersed small nanoparticles on carbon support. Accordingly, these nanoscale structures have a high active surface area like 81 m~2 g~(-1) for the 20 wt.% Pd/C electrocatalyst. The CO stripping experiments performed in alkaline medium have highlighted the dependence of the CO adsorption mode on palladium. When used as anode for glycerol or glucose electrooxidation in alkaline medium, they exhibit good activities. Moreover, the bimetallic catalysts showed an important improvement of the kinetics at lower potentials when compared to Pd/C. Some added value products like glycerate or glycolate have been detected by chromatographic analysis. These nanomaterials are promising electrodes in fuel or hybrid biofuel cell devices in a cogeneration of high value chemicals and energy process.
机译:钯基和金纳米材料是通过所谓的“溴化物阴离子交换”方法合成的。这种柔软清洁的合成路线导致碳载体上分散良好的小纳米颗粒。因此,对于20重量%的Pd / C电催化剂,这些纳米级结构具有高的活性表面积,如81m-2g(-1)。在碱性介质中进行的CO汽提实验突出了CO吸附模式对钯的依赖性。当用作碱性介质中甘油或葡萄糖电氧化的阳极时,它们表现出良好的活性。此外,与Pd / C相比,双金属催化剂在较低电势下显示出重要的动力学改进。通过色谱分析检测到一些增值产品,如甘油酸酯或乙醇酸酯。这些纳米材料在高价值化学品和能源工艺的热电联产中,是燃料或混合生物燃料电池设备中有希望的电极。

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    IC2MP, UMR-CNRS 7285, Universite de Poitiers, 4 rue Michel Brunet, B27, 86022 Poitiers Cedex, France;

    IC2MP, UMR-CNRS 7285, Universite de Poitiers, 4 rue Michel Brunet, B27, 86022 Poitiers Cedex, France;

    IC2MP, UMR-CNRS 7285, Universite de Poitiers, 4 rue Michel Brunet, B27, 86022 Poitiers Cedex, France;

    IC2MP, UMR-CNRS 7285, Universite de Poitiers, 4 rue Michel Brunet, B27, 86022 Poitiers Cedex, France;

    IC2MP, UMR-CNRS 7285, Universite de Poitiers, 4 rue Michel Brunet, B27, 86022 Poitiers Cedex, France;

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