Composition and structure of pyrophoric nickel catalysts according to X-ray diffraction data
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- 作者：T. Yu. Osadchaya ; A. V. Afineevskii…
- 关键词：Raney nickel ; porous nickel catalyst ; pyrophoricity ; deactivation
- 刊名：Russian Journal of Physical Chemistry A
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：91
- 期：1
- 页码：30-35
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Physical Chemistry;
- 出版者：Pleiades Publishing
- ISSN：1531-863X
- 卷排序：91
文摘
The properties of a nickel catalyst obtained by treatment of nickel–aluminum alloy with sodium hydroxide in the presence of H2O2 and additionally stabilized with increased pressure were studied. Additional stabilization decreased the catalyst activity by 25%, but gave a more distinct picture for an XRD analysis of the active catalyst surface and decreased the time of deactivation of the dehydrated catalyst with air oxygen. The catalyst stabilization was explained by the displacement of water, decrease in the pore size, and surface inhomogeneity.