期刊
JOURNAL OF CATALYSIS
卷 208, 期 1, 页码 187-196出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1006/jcat.2002.3564
关键词
catalysts; synthesis; characterization; molybdenum oxynitride; oxygen-modified molybdenum carbide; heteropolyanion precursor; phosphorus; hydrogenation
The effect of phosphorus on molybdenum oxynitrides and oxygen-modified carbides has been studied. Phosphorus was introduced via heteropolyanions. Catalysts were characterized by elemental analysis, X-ray diffraction, N-2 BET surface area, CO chemisorption, and X-ray photoelectron spectroscopy (XPS). XPS measurements show higher concentrations of lower Mo oxidation states on P addition to molybdenum oxynitrides. Two types of phosphorus were revealed by XPS spectra: phosphatelike at about 134 eV, and phosphide at 130 eV. Propene hydrogenation was used to probe the activity of the doped materials. Reactivity experiments over P-containing oxynitrides and oxygen-modified carbides show enhanced hydrogenating properties, in particular for the oxynitride materials. Turnover rate was studied as a function of P content. (C) 2002 Elsevier Science (USA).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据