Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Canada.
J Phys Chem A. 2010 Mar 25;114(11):3962-8. doi: 10.1021/jp907403b.
In this paper, a systematic study on preparation of multiwalled carbon nanotube (MWCNT)-supported nickel catalyst is pursued. Functional groups are introduced on the surface of MWCNTs using nitric acid, sulfuric acid, and partial oxidation in air. Nickel oxide nanoparticles are formed on the surface of functionalized multiwalled carbon nanotubes by incipient wetness impregnation of nickel nitrate, followed by calcination in air. The effects of acid type and concentration, acid treatment time, partial oxidation, nickel loading, precursor solvent, and calcination temperature on the size of the nickel nanoparticles and homogeneity of the composite material are evaluated. Characteristics of the Ni/MWCNT catalysts were examined using BET, scanning transmission electron microscopy, X-ray diffraction, thermogravimetric analysis in air and nitrogen, temperature-programmed reduction, X-ray photoelectron spectroscopy, acid-base titration, and zeta-potential analyzer. Results of this work are useful for formulating CNT-supported nickel catalysts for a wide range of different applications, such as reforming of hydrocarbons, catalytic hydrothermal gasification of biomass, and energy storage.
本文对多壁碳纳米管（MWCNT）负载镍催化剂的制备进行了系统研究。使用硝酸、硫酸和空气部分氧化在 MWCNT 表面引入官能团。通过硝酸镍的初始润湿浸渍在功能化多壁碳纳米管表面形成氧化镍纳米颗粒，然后在空气中煅烧。评估了酸的类型和浓度、酸处理时间、部分氧化、镍负载量、前体溶剂和煅烧温度对镍纳米颗粒尺寸和复合材料均匀性的影响。使用 BET、扫描透射电子显微镜、X 射线衍射、空气和氮气中的热重分析、程序升温还原、X 射线光电子能谱、酸碱滴定和动电分析仪对 Ni/MWCNT 催化剂的特性进行了检查。这项工作的结果可用于制备适用于各种不同应用的 CNT 负载镍催化剂，例如烃类重整、生物质催化热解气化和储能。
