Characterization of alkali-doped Ni/SiO2 catalysts

被引：28

作者：

Diaz, A ^{[1
]}

Acosta, DR ^{[1
]}

Odriozola, JA ^{[1
]}

Montes, M ^{[1
]}

机构：

[1] UNIV BASQUE COUNTRY, FAC CIENCIAS QUIM SAN SEBASTIAN, DEPT QUIM APLICADA, GRP INGN QUIM, SAN SEBASTIAN 28080, SPAIN

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1997年 / 101卷 / 10期

关键词：

D O I：

10.1021/jp963145u

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of the alkali doping on the reducibility and morphological properties together with distribution and crystallography of phases of a Ni/SiO2 catalyst have been investigated by N-2 adsorption measurements, diffuse reflectance TR Fourier transform spectroscopy (DRIFTS), CO adsorption, DRIFTS determinations, temperature-programmed reduction (TPR), X-ray diffraction line broadening (XRDLB), H-2 chemisorption, and TEM observations. Alkaline dopants produce an increase in the weakly adsorbed fraction of hydrogen and important changes in the adsorption modes of CO. Lithium and potassium modify the distribution of Ni across the support, inducing sintering phenomena, while sodium keeps nickel particle dispersion.

引用

页码：1782 / 1790

页数：9

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[1] KINETICS OF THE POISONING BY THIOPHENE OF SUPPORTED NICKEL-CATALYSTS [J].