炭载Pd-P催化剂对甲酸氧化的电催化性能  

Electrocatalytic performance of the carbon supported Pd-P catalyst for formic acid oxidation

作　　者：杨改秀[1,2] 李颖[1] 袁振宏[1] 孔晓英[1] 李婷[1] 陈冠益[2] 陆天虹[3] 孙永明[1] 

机构地区：[1]中国科学院广州能源研究所中国科学院可再生能源重点实验室,广东广州510640 [2]天津大学环境科学与工程学院内燃机燃烧学国家重点实验室,天津300072 [3]南京师范大学化学与材料科学学院,江苏南京210097

出　　处：《燃料化学学报》2013年第11期1367-1370,共4页Journal of Fuel Chemistry and Technology

基　　金：中国科学院可再生能源重点实验室(Y207K5)

摘　　要：用黄磷作原料,制备了具有不同Pd-P原子比的碳载Pd-P(Pd-P/C)催化剂,并且使用X射线衍射(XRD)和能量色散X射线光谱仪(EDX)等手段对制备的催化剂进行了表征,总结了P含量对Pd-P合金纳米粒子的粒径和晶体结构的影响。电化学测试结果表明,甲酸在Pd/C、Pd1P6/C和Pd1P8/C催化剂上,氧化峰峰电位由低到高依次为Pd1P6/C﹤Pd1P8/C﹤Pd/C,电化学稳定性顺序为Pd1P6/C>Pd1P8/C>Pd/C,Pd1P6/C催化剂对甲酸氧化的催化性能最佳,适量的P掺杂能够增强Pd/C催化剂对甲酸氧化的电催化活性和稳定性,因此,Pd-P/C催化剂是一类具有应用前景的直接甲酸燃料电池(DFAFC)阳极催化剂。The Pd-P/C catalyst with the high content of p0 was successfully prepared with the organic impregnation-reduction method. Pd-P/C catalysts with different Pd/P atomic ratios were characterized by X-ray diffraction （XRD）, Energy Dispersive X-ray Spectrometer （EDX）. The effect of Pd-P/C catalysts with different Pd/P atomic ratios on the oxidation of formic acid was also demonstrated by several electrochemical measures. It was found that the potential of the anodic peak of formic acid at catalyst electrodes increased in the order of Pd1 P6/C 〈Pd1 Ps/C 〈 Pd/C, and the electrochemical stability of three electrodes was in the order of PdlP6/C 〉 PdlPs/C 〉 Pd/C. The PdlP6 catalyst showed the best performance for the oxidation of formic acid. The Pd-P/C catalysts with the suitable atomic ratio of Pd and P had higher activity and stability for the oxidation of formic acid.

关 键 词：直接甲酸燃料电池 Pd-P C催化剂 甲酸氧化 电催化性能 

分 类 号：O646[理学—物理化学]