The ethylene glycol oxidation reaction on nickel and ruthenium modified palladium nanocatalysts was investigated with electrochemical, spectroelectrochemical, and chromatographic methods. These carbon‐supported materials, prepared by a revisited polyol approach, exhibited high activity towards the ethylene glycol electrooxidation in alkaline medium. Electrolysis coupled with high performance liquid chromatography/mass spectrometry (HPLC‐MS) and in situ Fourier transform infrared spectroscopy (FTIRS) measurements allowed us to determine the different compounds electrogenerated in the oxidative conversion of this two‐carbon molecule. High value‐added products such as oxalate, glyoxylate, and glycolate were identified in all electrolytic solutions, whereas glyoxylate was selectively formed at the Ru₄₅@Pd₅₅/C electrode surface. In situ FTIRS results also showed a decrease in the pH value in the thin layer near the electrode as a consequence of OH⁻ consumption during the spectroelectrochemical experiments.

中文翻译：

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乙二醇在钯基纳米催化剂上的电氧化机理研究：原位FTIRS和LC-MS分析

用电化学，光谱电化学和色谱法研究了镍和钌修饰的钯纳米催化剂上的乙二醇氧化反应。这些碳载体材料是通过多元醇方法重新制备的，在碱性介质中表现出对乙二醇电氧化的高活性。电解与高效液相色谱/质谱（HPLC-MS）和原位傅里叶变换红外光谱（FTIRS）测量相结合，使我们能够确定在这两个碳分子的氧化转化中电生成的不同化合物。在所有电解液中都鉴定出高附加值的产品，例如草酸盐，乙醛酸盐和乙醇酸盐，而乙醛酸盐则在Ru ₄₅ @Pd处选择性形成₅₅ / C电极表面。原位红外反射光谱结果也表明在电极作为OH的结果附近的薄层pH值的降低^-的光谱电化学实验过程中消耗。