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通过水热法合成棒状纳米Ce O2(Ce O2-R),并将Pt纳米颗粒负载于Ce O2表面,制得甲醇燃料电池的阳极催化剂Pt/Ce O2-R.通过结构与形貌表征,结果表明,Pt/Ce O2-R中Ce O2的暴露晶面为(111)和(002)晶面,改变了Pt周围的电子结构,进而降低了Pt-COads的键能,释放出更多的活性位.另外,Pt纳米颗粒在Ce O2-R表面分散更均匀.利用电化学工作站测试阳极催化剂Pt/Ce O2-R在酸性溶液中的电化学性能,证明Pt/Ce O2-R催化剂的甲醇电氧化性能与抗CO毒害能力较颗粒状Ce O2负载Pt催化剂(Pt/Ce O2-P)都有很大的提高,证明Ce O2-R作为Pt纳米颗粒的载体用于直接甲醇燃料电池的阳极反应具有发展潜力.
The anode catalyst Pt / Ce O2-R of methanol fuel cell was prepared by hydrothermal synthesis of CeO2-R and the Pt nanoparticles were supported on the surface of CeO2.The structure and morphology of the catalyst were characterized by XRD, It is shown that the exposed crystal planes of Ce O2 in Pt / Ce O2-R are (111) and (002) crystal planes, which change the electronic structure around Pt, thereby reducing the bond energy of Pt-COads and releasing more activity In addition, the Pt nanoparticles dispersed more evenly on the surface of Ce O2-R. The electrochemical performance of the Pt / Ce O2-R anode catalyst in acidic solution was tested by an electrochemical workstation to demonstrate that the methanol power of Pt / Ce O2-R catalyst Oxidation performance and anti-CO poisoning ability than the CeO 2 supported Pt catalyst (Pt / Ce O 2 -P) have greatly improved, proved that Ce O 2-R Pt nanoparticles as a carrier for the direct methanol fuel cell anode reaction Has potential for development.