碳纳米管载Pd-Au催化剂的合成及其对甲酸氧化的电催化性能

doi:10.3724/SP.J.1095.2014.30257

摘要/Abstract

摘要： 将萘-1-亚甲基膦酸通过π-π堆积作用修饰在多壁碳纳米管(MWCNT)上，然后制备了MWCNT载Pd(Pd/MWCNT)催化剂。利用Pd和HAuCl4间的置换反应制得MWCNT载Pd-Au(Pd-Au/MWCNT)催化剂。透射电子显微镜(TEM)、X射线光电子能谱(XPS)和X射线衍射光谱(XRD)测试结果显示，非合金化的Pd-Au纳米粒子均匀分布在MWCNT表面。循环伏安和计时电流测试显示，非合金化Pd-Au/MWCNT催化剂对甲酸氧化的电催化活性以及稳定性优于Pd/MWCNT催化剂。

关键词: 直接甲酸燃料电池, 碳纳米管, 催化剂, 甲酸氧化

Abstract: Naphthalen-1-ylmethylphosphonic acid was modified on multiwall carbon nanotube(MWCNT) by the π-π stacking interaction. Then, the Pd catalyst was supported on it. Furthermore, the MWCNT supported Pd-Au(Pd-Au/MWCNT) catalyst was facially prepared by the replacement reaction between Pd nanoparticles and HAuCl4. Transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy measurements showed that non-alloyed Pd-Au nanoparticles were highly dispersed on the surface of MWCNT. Cyclic voltammetry and chronoamperometric measurements indicated that the Pd-Au/MWCNT catalyst exhibited better electrocatalytic activity and stability for formic acid oxidation than that of the Pd/MWCNT catalyst.

Key words: direct formic acid fuel cells, carbon nanotubes, catalyst, formic acid oxidation

中图分类号:

O646

季益刚, 印亚静, 郭琦, 司南, 马娟, 陆天虹. 碳纳米管载Pd-Au催化剂的合成及其对甲酸氧化的电催化性能[J]. 应用化学, DOI: 10.3724/SP.J.1095.2014.30257.

JI Yigang1, YIN Yajing1, GUO Qi1, SI Nan1, MA Juan2*, LU Tianhon3. Preparation of Carbon Nanotubes Supported Pd-Au Catalyst and Their Electrocatalytic Activity for Formic Acid Oxidation[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30257.

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