Controllable ion exchange synthesis of Ir/Carbon catalyst
ZHU Shao-min1, JIANG Yu-ling1, RONG Jun2
1.College of Environmental and Chemical Engineering,Dalian Jiaotong University,Dalian 116028;2.Zhuzhou CSR Electric Co. LTD,Zhuzhou 412001,China
Abstract:
In this paper,a carbon based iridium (Ir) catalyst was prepared by an ion exchange procedure using H2IrCl6 as precursor and a strong basic anion exchange resin as substrate. The Ir/Carbon sample was obtained by carbonizing the precursor. Effects of carbonization parameters such as temperature and time on size and dispersion of iridium crystallite were studied. Samples were prepared at 400 oC and 500 oC to investigate the effect of carbonization temperature. The SEM image of the Ir/Carbon composite shows a hard particle of 0. 2 - 0. 4 mm in diameter,which maintains a spherical shape. The TEM images of the catalyst show that no obvious effects of carbonization temperature or time are observed on the iridium particle size. Calcinated Ir nanoparticles prepared in ion exchange still keep their small particle-sized and narrow-sized distribution. The content of Ir supported on carbon can be well controlled simply by adjusting the relative ratio of Ir to carbon. Such a promising synthesis procedure is a versatile approach that can be extended to the fabrication of some carbon-supported metal catalysts or as a simple,rapid,and highly sensitive method.
Key words: Ir/Carbon ion exchange nanoparticle
DOI：10.11916/j.issn.1005-9113.2010.02.025
Clc Number:O643.36
Fund:
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Controllable ion exchange synthesis of Ir/Carbon catalyst
本站小编 哈尔滨工业大学/2019-10-23
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