CAJ | 학술논문

目的：解决质子交换膜燃料电池贵金属催化剂利用率低、电化学稳定性差的问题,从而堆动其产业化进程。方法通过湿化学共沉积法获得低Pt特征的PtCo合金催化剂,采用欠电位沉积方法制备Au修饰的PtCo合金催化剂,应用原子吸收光谱和电化学循环伏安加速测试技术研究Au修饰PtCo合金催化剂的电化学稳定性。结果成功制备了Au修饰的PtCo合金催化剂。 Au修饰后,PtCo合金催化剂的氧还原反应性能几乎没有改变,但Co的溶蚀率得到降低,而且电化学稳定性也得到提高。结论通过采用Au等具有高电化学腐蚀电位的金属修饰Pt合金催化剂,以提高催化剂电化学稳定性的研究思路是可行的。
목적：해결질자교환막연료전지귀금속최화제이용솔저、전화학은정성차적문제,종이퇴동기산업화진정。방법통과습화학공침적법획득저Pt특정적PtCo합금최화제,채용흠전위침적방법제비Au수식적PtCo합금최화제,응용원자흡수광보화전화학순배복안가속측시기술연구Au수식PtCo합금최화제적전화학은정성。결과성공제비료Au수식적PtCo합금최화제。 Au수식후,PtCo합금최화제적양환원반응성능궤호몰유개변,단Co적용식솔득도강저,이차전화학은정성야득도제고。결론통과채용Au등구유고전화학부식전위적금속수식Pt합금최화제,이제고최화제전화학은정성적연구사로시가행적。
ABSTRACT:Objective To facilitate the commercialization of proton exchange membrane fuel cells by revolving the key issues in-cluding low utilization and deteriorated stability of noble metal catalysts. Methods After preparation of PtCo alloy catalysts with low Pt loading by a chemical co-deposition method, the gold decorated PtCo alloy catalyst was prepared in terms of an under-potential-deposition method, and then the electrochemical stability of the gold-decorated PtCo alloy catalyst was characterized by atomic ab-sorption spectroscopy and electrochemical accelerated test technique. Results Au-decorated PtCo alloy catalyst was successfully prepared. After decoration of gold, the oxygen reduction reaction activity of PtCo alloy catalysts remained unchanged, and the ero-sion rate of Co element for PtCo alloy catalysts in electrolyte solutions decreased with an improved electrochemical stability. Con-clusion It was feasible to improve the stability of PtCo alloy catalysts by decoration with metals possessing a high corrosion potential such as Au.