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利用微波辅助有机溶胶法成功制备了Pd3Ru/C纳米电催化剂。相比传统的高压有机溶胶法,该法大大降低了有机溶剂的使用量并缩减了反应时间,是一种环境友好和资源节约的新型方法。采用XRD,TEM,XPS和电化学测试等手段对其结构和电化学性能进行了表征和评价。XRD和TEM结果表明微波辅助制备的Pd3Ru/C催化剂其粒径只有约3.0 nm,分散性也较Pd/C得到显著改善;XPS谱图证实催化剂活性组分Pd和Ru的原子比约为3.13∶1,Pd和Ru两种元素间发生了相互作用。与同条件制备的Pd/C催化剂相比,Pd3Ru/C催化剂在电极上发生甲酸氧化反应的主要峰电位负移了约100 mV,峰电流密度增大了2/3左右,其甲酸电氧化活性得到明显提高。
The Pd3Ru / C nano-electrocatalyst was successfully prepared by microwave-assisted sol-gel method. Compared with the traditional high-pressure organic sol method, this method greatly reduces the amount of organic solvents used and reduces the reaction time, which is a new method of environmental friendliness and resource conservation. The structure and electrochemical properties of the composites were characterized and evaluated by XRD, TEM, XPS and electrochemical measurements. The results of XRD and TEM show that the particle size of Pd3Ru / C catalyst prepared by microwave irradiation is only about 3.0 nm and the dispersibility is also significantly improved compared with that of Pd / C. The XPS spectra confirm that the atomic ratio of Pd to Ru is about 3.13: 1, Pd and Ru two kinds of interaction between elements. Compared with the Pd / C catalyst prepared under the same conditions, the main peak potential of Pd3Ru / C catalyst for the oxidation of formic acid on the electrode was negatively shifted by about 100 mV and the peak current density increased by about 2/3. The formic acid electrooxidative activity Obvious improvement.