镍前驱体对非负载型镍催化剂上甲烷分解活性的影响.pdf

2010 Chinese Journal of Catalysis Vol. 31 No. 11

文章编号: 0253-9837(2010)11-1358-05 DOI: . 研究论文: 1358~1362
镍前驱体对非负载型镍催化剂上甲烷分解活性的影响
张微 1,2, 葛庆杰 1, 徐恒泳 1
1中国科学院大连化学物理研究所, 辽宁大连 116023
2中国科学院研究生院, 北京 100049
摘要:分别以硝酸镍和乙酸镍为前驱体, 采用沉淀法制备了非负载型 Ni 催化剂, 运用 X 射线衍射、H2-程序升温还原及 CH4 程序
升温表面反应对催化剂进行了表征, 并考察了 Ni 催化剂上 CH4 分解反应活性. 结果表明, 以乙酸镍为前驱体制得的 NiO 样品粒
子尺寸较小, 较易被还原, 还原后得到的催化剂催化 CH4 分解活性和稳定性较高; 而以硝酸镍为前驱体制得的 NiO 样品粒子尺
寸较大, 较难被还原, 还原后催化剂上 CH4 分解活性和稳定性较低. 制备过程中乙酸镍与溶剂乙二醇所形成的配合物是获得尺
寸较小 NiO 样品的关键.
关键词:硝酸镍; 乙酸镍; 氧化镍; 非负载型催化剂; 甲烷; 分解
中图分类号:O643 文献标识码:A
Influence of Nickel Precursors on Catalytic Activity of Non-supported Ni
for Methane position
ZHANG Wei1,2, GE Qingjie1,*, XU Hengyong1,*
1Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Abstract: Non-supported nickel oxide catalyst samples were prepared by precipitation using different nickel precursors. The influence of
nickel precursors on catalyst behavior was investigated by X-ray diffraction, H2 temperature-programmed reduction, CH4 tempera-
ture-programmed surface reaction, and methane position stability tests. The results showed that the particle size of the NiO sample
prepared from a nickel acetate precursor (named NiO-A) was smaller than that of the N