摘要
近年来,Pt-Y合金被证明是一种具有强氧还原电催化活性和高稳定性的催化剂.然而,纳米Pt-Y合金的可控规模化的制备工艺仍是一个挑战.我们采用自上而下的去合金化方法制备了三维双连续的纳米多孔的Pt-Y合金,与商业Pt/C催化剂相比,纳米多孔Pt-Y具有更高的氧还原电催化活性和良好的稳定性,催化性能和稳定性的提高可能源于Pt-Y合金优越的氧还原催化活性和三维纳米多孔结构优势的协同增效作用.
Recently,Pt-Y alloy has displayed an excellent electrocatalytic activity for oxygen reduction reaction(ORR),and is regarded as a promising cathode catalyst for fuel cells.However,the bulk production of nanoscaled Pt-Y alloy with outstanding catalytic performance remains a great challenge.The authors of this paper address the challenge through a simple de-alloying method to synthesize nanoporous Pt-Y alloy(NP-PtY)with a typical ligament size of^5 nm.By combining the intrinsic superior electrocatalytic activity of Pt-Y alloy with the special nanoporous structure,the NP-PtY bimetallic catalyst presents a higher activity for ORR and ethanol oxidation reaction,and better electrocatalytic stability than the commercial Pt/C catalyst and nanoporous Pt alloy.The asmade NP-PtY holds great application potential as a promising electrocatalyst in proton exchange membrane fuel cells due to the advantages of the facile preparation and the excellent catalytic performance.
作者
崔荣静
韩志达
CUI Rongjing;HAN Zhida(School of Chemistry and Materials Engineering,Changshu Institute of Technology,Changshu 215500,China;Jiangsu Laboratory of Advanced Functional Materials,Changshu Institute of Technology,Changshu 215500,China;School of Physics and Electronic Engineering,Changshu Institute of Technology,Changshu 215500,China)
出处
《常熟理工学院学报》
2018年第2期1-2,6,共3页
Journal of Changshu Institute of Technology
基金
国家自然科学基金项目"Ni-Mn基铁磁形状记忆合金的低温相分离和交换偏置效应研究"(51371004)
关键词
去合金化
氧还原
电催化剂
de-alloy
oxygen reduction reaction
electrocatalyst
