Abstract In this work, tantalum nitride and tantalum carbide (TaN-TaC) composites are prepared using a one-step calcination method. The resulting TaN-TaC composites have excellent conductivity, and therefore, potential applications in the electrode materials of fuel cells. Then, palladium nanoparticles loading on TaN-TaC (Pd/TaN-TaC) electrocatalysts are synthesized using the reflux method. The X-ray photoelectron spectroscopy results imply that the valance states of palladium are of the form Pd0 and Pd2+ on the surface of TaN-TaC composites. The electrocatalytic activity of the Pd/TaN-TaC catalysts is measured in a 0.5 mol L−1 KOH solution and 1 mol L−1 of ethylene glycol. These results imply that the Pd/TaN-TaC electrocatalyst modified glassy carbon electrode has a high catalytic activity for ethylene glycol electrooxidation in an alkaline medium. The dosage of Pd is 7% (mass ratio of Pd and TaN-TaC) and it exhibits the higher electrocatalytic activity, and superior to the commercial Pd/C (10%).

中文翻译：

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Pd负载的TaN-TaC电催化剂在碱性介质中用于乙二醇氧化的高催化性能

摘要 本工作采用一步煅烧法制备了氮化钽和碳化钽 (TaN-TaC) 复合材料。所得TaN-TaC复合材料具有优异的导电性，因此在燃料电池的电极材料中具有潜在的应用价值。然后，使用回流法合成负载在 TaN-TaC (Pd/TaN-TaC) 电催化剂上的钯纳米颗粒。X 射线光电子能谱结果表明，钯在 TaN-TaC 复合材料表面的价态为 Pd0 和 Pd2+ 形式。Pd/TaN-TaC 催化剂的电催化活性在 0.5 mol L-1 KOH 溶液和 1 mol L-1 乙二醇中测量。这些结果表明，Pd/TaN-TaC 电催化剂修饰的玻碳电极在碱性介质中对乙二醇电氧化具有较高的催化活性。Pd的用量为7%（Pd和TaN-TaC的质量比），表现出更高的电催化活性，优于商业Pd/C（10%）。