摘要
本文报导了Cu-Gr-SiO_2和Cu-Cr-Mn-SiO_2催化剂的ESR谱。焙烧后的催化剂出现Cu^(2+)和Cr^(5+)信号,活性状态是Cu^0+Cr^(3+),催化剂的活性中心可能是Cu^0微粒。反应后的催化剂呈现出S型信号和积炭信号。多数的实验谱是在常温用常规方法纪录的。部分实验是在谐振腔中直接进行化学反应的动态条件下纪录的。
The new catalysts, Cu-Cr-SiO_2 and Cu-Cr-Mn-SiO_2, are used for the reduction of nitrobenzene to aniline. It is well shown that the catalysts reveal Cu^(2+) and Cr^(5+) signals after being catcined at 400℃ or more and reveal strong S-shaped Cr^(3+) signal with a sharp narrow carbon signal overlapped at its center after reduction reaction. Therefore the active state of the catalysts might be Cu^0+Cr^(3+), and the active centers might be Cu^0 fine particles.Most of the spectra were recorded with routine procedure under room temperature, while some were recorded under dynamic conditions during the course of catalytic reaction in the cavity resonator. The main ESR parameters are as follows:
出处
《吉林大学学报（理学版）》
CAS
1980年第2期86-92,共7页
Journal of Jilin University:Science Edition
