摘要:本文通过使用微波加热法制备不同孔径的碳载碳化钨(WCCNTs)载体,随后将钯(Pd)负载在WCCNTs上制备出钯基催化剂。并且使用XRD对其机型表征,使用循环伏安法(CV)和电化学阻抗(EIS)对不同载体的催化剂进行对比分析。MH1,MH3,MH7以及MH8的比表面积分别为377.3 m2/g,172.5868 m2/g,106.1960 m2/g和88.1998 m2/g。Pd/WCMH1、Pd/WCMH3、Pd/WCMH7与Pd/WCMH8在2-Thetra角为40.084°位置均有Pd的峰出现;Pd/WCMH3中根据Pd的[111]晶面衍射峰计算其粒径为18.1nm;Pd/WCMH7中Pd的粒径为13.7nm;Pd/WCMH8中Pd的粒径为19.1nm。在20mV/s的扫速下Pd/WCMH7的电流峰值最高为6×10-4A。35205 毕业论文关键词:碳化钨;钯;直接乙醇燃料电池;微波加热法;循环伏安;交流阻抗;比表面积;粒径
Abstract
Abstract:Through the use of microwave heating prepared with different pore sizes of carbon-supported tungsten carbide (WCCNTs) carrier, followed by palladium (Pd) supported on a palladium-based catalyst prepared WCCNTs. And using XRD characterization of its models, using cyclic voltammetry (CV) and electrochemical impedance (EIS) for a catalyst different carriers were analyzed. MH1, MH3, MH7 and MH8 specific surface area was 377.3 m2 / g, 172.5868 m2 / g, 106.1960 m2 / g and 88.1998 m2 / g. Pd / WCMH1, Pd / WCMH3, Pd / WCMH7 and Pd / WCMH8 2-Thetra angle of 40.084 ° position has Pd peak occurs; Pd / WCMH3 calculated according to a particle size of Pd [111] crystal face diffraction peak 18.1nm; Pd in the particle size of Pd / WCMH7 was 13.7nm; Pd in the particle size of Pd / WCMH8 was 19.1nm. In the 20mV / s sweep speed current peak Pd / WCMH7 of up to 6 × 10-4A. EIS in the Pd / WCMH7 minimum impedance.