摘要
采用电沉积法分别制备以钛网(Ti)为基体材料的聚吡咯(PPy)修饰的、PPy与十六烷基三甲基溴化铵(CTAB)、PPy与十二烷基硫酸钠(SDS)、PPy与十二烷基磺酸钠(SLS)联合修饰的钯-镍双金属(Pd-Ni)催化电极(Pd-Ni/PPy/Ti电极、Pd-Ni(CTAB)/PPy/Ti电极、Pd-Ni(SDS)/PPy/Ti电极和Pd-Ni(SLS)/PPy/Ti电极).探讨了不同表面活性剂掺杂对电极电化学催化活性的影响.循环伏安(CV)测试表明,在研究范围内,4个电极的最大氢吸附峰电流值分别为-93、-116、-70、-82mA,Pd-Ni(CTAB)/PPy/Ti电极的电催化性能最优.扫描电镜(SEM)分析了不同表面活性剂的引入对电极表面形态的影响.利用电感耦合等离子体-原子发射光谱(ICP-AES)分析了电极表面Pd、Ni的负载量.X射线衍射(XRD)测试结果表明4电极都形成了钯镍合金.试验表明,阳离子表面活性剂CTAB的引入使电极具有很好的电催化性能,电化学脱氯潜能大.
Palladium-nickel （Pd-Ni）bimetallic composite electrodes were fabricated on meshed titanium（ Ti ）substrates by electrochemical deposition in the presence of polymeric pyrrole （ PPy ）, PPy-cetyl trimethyl ammonium bromide （ CTAB）, PPy-sodium dodecyl sulphate （ SDS）, PPy-sodium dodecyl sulfonate （ SIS ）, respectively （ Pd-Ni/PPy/Ti electrode, Pd-Ni （ CTAB ） / PPy/Ti electrode, Pd-Ni （ SDS ）/PPy/Ti electrode and Pd-Ni （ SIS ）/PPy/Ti electrode ）. The different surfactant effects on electrochemical catalytic activities were studied. Cyclic voltammetry （CV）showed that the hydrogen adsorption peak values of the four electrodes were - 93, - 116, - 70, - 82mA, respectively, which indicated that the Pd-Ni （ CTAB）/PPy!Ti electrode had best electrochemical catalytic activity. Scanning electron microscope （SEM） images revealed the effects of different surfactants on the surface morphology of electrodes. The quantities of Pd and Ni on the four electrodes were analyzed by means of inductively coupled plasma-atomic emission spectrometry（ ICP-AES）. The results of X-ray diffraction（XRD） showed that four electrode films were made of Pd-Ni alloy. Experimental results indicated that the Pd-Ni bimetallic composite electrode doped cationic surfactant CTAB had good electrochemical performance and high potential of reductive dechlorination.
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2012年第6期1072-1080,共9页
Journal of Basic Science and Engineering
基金
国家自然科学基金项目(51078009)
北京市自然科学基金项目(8112006
基于载Pd多孔催化电极的CPs的脱氯降解)
关键词
聚吡咯
钯-镍双金属
表面活性剂
电化学性能
polymeric pyrrole
palladium-nickel bimetal
surfactant
electrochemical performance
