摘要
采用喷雾干燥法和还原炭化处理制备具有中空介孔结构的碳化钨钴复合粉(HTCCS),其中,钴的质量含量为6%。在碳化钨钴复合粉表面的钴和氯化钯发生置换反应,得到纳米Pd/WC复合催化剂。采用X射线粉末衍射(XRD)、扫描电镜(SEM)和透射电镜(TEM)对样品的形貌和晶型结构进行了表征。结果表明,5.0-6.0 nm钯纳米粒子取代钴均匀分布在碳化钨微球表面。采用循环伏安和计时电流法研究了在酸性溶液中Pd/WC催化剂对甲酸的电催化氧化性能,结果表明,Pd/WC催化剂比Pd/C催化剂对甲酸呈现出更高的电催化氧化活性和稳定性。
Hollowtungsten carbide and cobalt spheres（ HTCCS） with cobalt concentration of 6% were prepared by spray conversion and reduction carbonization methods.The HTCCS with diameters of about 8- 18 μm were covered with 0.3- 1.0 μm microporous.The Pd/WC catalyst was prepared through the replacement reaction between Co nanoparticles on the surface of HTCCS and Pd Cl4.The electro-catalytic performances for formic acid electro-oxidation were investigated by cyclic voltammetry and chronoamperometry.It exhibited the lowonset potential,excellent catalytic activity and stability compared with Pd/C due to the larger electrochemical surface area（ ECSA） and the synergistic effect between Pd and WC.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2016年第6期698-702,共5页
Journal of Fuel Chemistry and Technology
基金
the National Natural Science Foundation of China(51174101,51464013 and 51404110)
Jiangxi Natural Science Foundation of China(20151BAB213011)
Education Department Project Fund of Jiangxi Province(GJJ150665,GJJ150648)
Key Project of Jiangxi University of Science and Technology(NSFJ2015-K18)~~
关键词
直接甲酸燃料电池
甲酸氧化
碳化钨
电催化
介孔材料
direct formic acid fuel cell
formic acid oxidation
WC-Co composite spheres
electro-catalyst
mesoporous materials
作者简介
Corresponding author. E-mail： yangzhou1998@ 126. com.
