采用超声共沉淀法制备了多孔状稀土合金氧化物前驱体,将其与CaH2/H2进行低温还原扩散反应得到合金粉样品,并采用TEM、XRD、电化学工作站测定了样品的粒径、晶相变化及其电催化性能,探讨了稀土合金催化剂的微观形貌、晶相结构和电催化性能之间的关系。TEM、XRD测试结果表明样品粒径均匀,颗粒大小约20nm。在此合金粉上化学修饰Pt后用作质子交换膜燃料电池的阳极催化剂,组装成单电池进行电催化性能评价,测试结果表明具有良好的氢传质动力,提高PMEFC在室温下操作时的功率输出。
Nano rare earth alloy was prepared by a supersonic co-precipitation and low temprature reduction synthesis method. The research of XRD, SEM, TEM indicates that the particle size of the sample powder is about 20nm, and the test results by PEMFC electrochemistry workstation show that the sample powder modified by Pt has good electrocatalytic activity due to its good hydrogen transfer power.
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