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  

Preparation of Carbon Nanotubes Supported Pd-Au Catalyst and Their Electrocatalytic Activity for Formic Acid Oxidation

作　　者：季益刚[1] 印亚静[1] 郭琦[1] 司南[1] 马娟 陆天虹[3] 

机构地区：[1]江苏第二师范学院化学系,南京210013 [2]昆山市药品监督检验所,昆山215300 [3]南京师范大学化学与材料科学学院,江苏省新型动力电池重点实验室,南京210097

出　　处：《应用化学》2014年第1期69-75,共7页Chinese Journal of Applied Chemistry

基　　金：江苏省高校自然科学基金(10KJD150007);江苏第二师范学院"十一五"规划课题(JSjy2008qz03)资助项目~~

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。Naphthalen-l-ylmethylphosphonic acid was modified on muhiwall carbon nanotube （MWCNT） by the ＂rr-＇rr 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.

关 键 词：直接甲酸燃料电池 碳纳米管 催化剂 甲酸氧化 

分 类 号：O646[理学—物理化学]