有序介孔碳改性及M@Pt核殼結(jié)構(gòu)催化劑的制備和表征.pdf

1、南京航空航天大學(xué)碩士學(xué)位論文有序介孔碳改性及M@Pt核殼結(jié)構(gòu)催化劑的制備和表征姓名：陳秀申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：應(yīng)用化學(xué)指導(dǎo)教師：何建平20090301有序介孔碳改性及 M@Pt 核殼結(jié)構(gòu)催化劑的制備和表征 II Abstract Ordered me

2、soporous carbon has been synthesized from a solvent inducement self-assembly with resol as carbon precursor, F127 as the structure directing agent in this paper. It has been proved that the obtained carbon was hydrophobi

3、c, it represents worse performance than hard-templet carbon when supported Pt catalyst with chemical reduction method. So it is necessary to modify the surface of ordered mesoporous carbon in order to improve its wettabi

4、lity. In order to reduce the quantity and improve the use ratio of Pt, M@Pt(M=Co, Ni) core-shell structure catalyst was prepared in this paper. Introducing the functional group to the surface of ordered mesoporous carbo

5、n is a frequently-used method. Nitrogen-doped ordered mesoporous carbon was synthesized by carbonizing at 300℃~900℃, containing polymerized aniline onto ordered mesoporous carbon. The research revealed that the nitrogen-

6、doped carbon, which was carbonized at high temperature, not only had ordered mesoporous structure, but also reserved many hydrophilic imine groups. It represented better electric-catalysis performance than pure carbon wh

7、en loaded Pt particles with a microwave synthesis process. Its active surface area is 59.4m2g-1, which was higher than pure carbon loaded Pt catalyst(2.4m2g-1). It indicated that imine group modified ordered mesoporous c

8、arbon could improve the performance of Pt. We synthesized the ordered mesoporous carbon with addition of cobaltous acetate as assisted catalyst. We find that the addition of appropriate cobaltous doesn’t destroy the orde

9、red mesoporous structure of carbon. The metallic Co, which was come from carbonization, could form many active points on the surface of ordered mesoporous carbon. It is benefit for the loading of Pt. The CV tests indicat

10、ed that the highest active surface area of modified carbon supported Pt catalyst reached to 128.7m2g-1. It indicated that during the preparation process, the addition of appropriate cobalt salt in ordered mesoporous carb

11、on could also improve the performance of Pt. In order to reduce the quantity and improve the use ratio of Pt, the paper also put attention on the Pt catalyst self, we synthesized Co@Pt/XC-72 and Ni@Pt/XC-72 nanoparticles

12、 with a confirmed core-shell structure, based on a two steps glycol microwave reduction method and a galvanic replacement method, respectively. The core-shell structure catalyst could augment the active surface area and