EFFECT OF REDUCTION AND OXIDATION TREATMENTS ON PD/ZNO CATALYSTS

被引：52

作者：

HONG, CT ^{[1
]}

YEH, CT ^{[1
]}

YU, FH ^{[1
]}

机构：

[1] NATL TSING HUA UNIV, INST CHEM, HSINCHU 300, TAIWAN

来源：

APPLIED CATALYSIS | 1989年 / 48卷 / 02期

关键词：

Chemical Reactions--Reduction - Microscopic Examination--Transmission Electron Microscopy - Palladium and Alloys - X-Rays--Diffraction - Zinc Compounds;

D O I：

10.1016/S0166-9834(00)82807-9

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 effect of hydrogen reduction and subsequent calcination on Pd/ZnO catalysts was investigated by temperature-programmed reduction (TPR), transmission electron microscopy (TEM) and X-ray diffraction (XRD) techniques. The TPR studies showed that ZnO was reduced by hydrogen spilt over from palladium. This reduction started mildly at room temperature and became vigorous at ca. 700 K. The XRD results revealed that Pd-Zn alloys were formed on the catalyst after reduction at 700 K. The morphology of the palladium crystallites on the catalysts was found by TEM to be changed with reduction treatment. The shape of these crystallites was globular after hydrogen reduction at ambient temperature.

引用

页码：385 / 396

页数：12

共 12 条

[1] THE INTERACTION OF PALLADIUM WITH ALUMINA AND TITANIUM-OXIDE SUPPORTS [J].