Au纳米粒子混合“肠状”Pd纳米线的Au-Pd/C催化剂的制备与表征
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摘要
用化学还原法制备Au-Pd双金属混合纳米胶体溶液,然后负载在活性炭上获得Au-Pd/C催化剂,利用TEM表征了纳米粒子负载前后的尺寸与形态,并用XPS技术表征了纳米Au-Pd/C催化剂上Au、Pd的表面化学状态,讨论了胶体溶液混合前后所得到的催化剂上Au、Pd的结合能变化。结果得到了Au混合"肠状"Pd纳米线的Au-Pd/C催化剂,两者结合产生的协同催化效应同时降低了Au和Pd的结合能。
The Au-Pd bimetallic mixed nano-colloidal solution was prepared by chemical reduction,and then it was loaded onto activated carbon to obtain Au-Pd/C catalyst.The size and morphology of nanocrystalline particles before and after loading were characterized by TEM,and the surface chemical state of Au,Pd on nano Au-Pd/C catalyst was characterized by XPS technique.The change of the binding energy of Au,Pd on the catalyst obtained before and after mixing of the colloidal solution was discussed.The Au-Pd/C catalyst of Au mixed with "intestinal"Pd nanowires was obtained,and the synergistic catalytic effect resulted from the combination decreased the binding energy of Au and Pd at the same time.
The Au-Pd bimetallic mixed nano-colloidal solution was prepared by chemical reduction,and then it was loaded onto activated carbon to obtain Au-Pd/C catalyst.The size and morphology of nanocrystalline particles before and after loading were characterized by TEM,and the surface chemical state of Au,Pd on nano Au-Pd/C catalyst was characterized by XPS technique.The change of the binding energy of Au,Pd on the catalyst obtained before and after mixing of the colloidal solution was discussed.The Au-Pd/C catalyst of Au mixed with "intestinal"Pd nanowires was obtained,and the synergistic catalytic effect resulted from the combination decreased the binding energy of Au and Pd at the same time.
引文
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3 杨建辉,逯乐慧,张洪杰.无机化学学报,2008,24(8),1191.
4 Venezia A M,Parola La V,Deganello G B,et al.Journal of Catalyst,2003,215,317.
5 麻春艳,李新华,金明善,等.催化学报,2007,28(6),535.
6 Deffernez,Hermans S,Devillers M.Applied Catalysis A:General,2005,282,303.
7 董颖男,董守安,唐春.高等学校化学学报,2009,30(7),1397.
8 李品将,董守安,唐春,等.化学学报,2006,64(11),1140.
9 董颖男,董守安,唐春.贵金属,2007,28(3),20.
10 苏琳琳.纳米贵金属催化剂液相催化氧化乙二醛形成乙醛酸的研究.硕士学位论文,昆明贵金属研究所,2010.
11 苏琳琳,董守安,杨辅龙,等.贵金属,2011,32(2),20.
12 苏琳琳,侯文明,左川,等.有色金属工程,2016,6(2),6.
13 陈妹琼,蔡志泉,张敏,等.化工进展,2015,34(7),1894.
14 顾春虎,殷晨波,朱亚军,等.传感器与微系统,2015,34(3),34.