RuO2–SnO2 nanocomposite electrodes for methanol electrooxidation
RuO2–SnO2 nanocomposite electrodes for methanol electrooxidation
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DOI：
10.1016/j.jallcom.2010.07.012
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发表时间：
2010-09
影响因子：
6.2
通讯作者：
Jong‐Min Lee;Sang-Beom Han;Young-Woo Lee;You-Jung Song;J. Kim;Kyung‐Won Park
中科院分区：
文献类型：
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作者：
Jong‐Min Lee;Sang-Beom Han;Young-Woo Lee;You-Jung Song;J. Kim;Kyung‐Won Park
采用胶体合成法制备了RuO 2-SnO 2纳米结构甲醇电氧化电极。利用X射线衍射和透射电子显微镜观察到，纳米复合载体的结晶度随着热处理的进行而增加，这是由于尺寸为1.5 nm的SnO 2和RuO 2纳米相的结晶度增加。在RuSnO 2负载催化剂的情况下，Pt纳米催化剂的尺寸为约3 nm的分散和混合的RuSnO 2纳米复合载体。电化学和热重分析表明，与Vulcan XC-72负载型催化剂相比，RuSnO 2负载型催化剂表现出优异的催化活性和稳定性。此外，与制备的RuSnO 2负载的Pt催化剂相比，在400°C下加热的RuSnO 2负载的Pt催化剂表现出优异的催化活性和稳定性，这可能是由于热处理引起的结晶度增加。
The RuO2–SnO2nanostructured electrodes for methanol electrooxidation are prepared by means of colloidal synthetic method. Using X-ray diffraction method and transmission electron microscopy, it is observed that the crystallinity of nanocomposite supports is increased with heat treatment due to an increased crystallinity of SnO2and RuO2nanophases with ∼5nm in size. In the case of the RuSnO2supported catalysts, Pt nanocatalysts with ∼3nm in size are well dispersed and mixed with RuSnO2nanocomposite supports. Using an electrochemical and thermogravimetric analysis, it is found that the RuSnO2supported catalysts show an excellent catalytic activity and stability in comparison with Vulcan XC-72 supported catalyst. Furthermore, compared to the Pt catalyst supported by as-prepared RuSnO2, the Pt catalyst supported by RuSnO2heated at 400°C displays an excellent catalytic activity and stability, which could be due to an increased crystallinity caused by heat treatment.