中国科技论文在线

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2009年12月23日

【期刊论文】Comparative X-ray Photoelectron Spectroscopic Study on the Desulfurization of Thiophene by Raney Nickel and Rapidly Quenched Skeletal Nickel

乔明华， Huarong Hu， † Minghua Qiao， *， † Fuzhong Xie， † Kangnian Fan， † Hao Lei， ‡ Dali Tan， ‡ Xinhe Bao， ‡ Hailong Lin， § Baoning Zong， § and Xiaoxin Zhang§

J. Phys. Chem. B 2005, 109, 5186-5192，-0001，（）：

-1年11月30日

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2009年12月23日

【期刊论文】Solution route to single crystalline SnO platelets with tunable shapes

乔明华， Shuai Wang， a Songhai Xie， a Hexing Li， b Shirun Yan， a Kangnian Fana and Minghua Qiao， *a

，-0001，（）：

-1年11月30日

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2009年12月23日

【期刊论文】Liquid-phase chemoselective hydrogenation of 2-ethylanthraquinone over chromium-modified nanonized amorphous Ni-B catalysts

乔明华， Jing Fang a， Xueying Chen a， Bo Liu a， Shirun Yan a， Minghua Qiao a， ∗， Hexing Li b， Heyong He a， Kangnian Fan a， *

Journal of Catalysis 229 (2005) 97-104，-0001，（）：

-1年11月30日

摘要

Liquid-phase hydrogenation of 2-ethylanthraquinone to 2-ethylanthrahydroquinone has been investigated over Raney Ni, nanosized amorphous Ni-B, and chromium-modified Ni-B catalysts. It has been found that the amorphous Ni-B and chromium-modified Ni-B catalystsexhibited superior selectivity, whereas the chromium-modified Ni-B catalysts had better activity and selectivity than unmodified Ni-B catalyst. Based on the characterizations, the higher selectivity of the amorphous catalysts is ascribed to the dominant population of the stronglybound hydrogen, which is not reactive for the hydrogenation of the aromatic ring, along with the repulsive interaction between the aromatic ring and the electron-rich Ni due to electron donation from alloying B. The addition of chromium decreased the particle size of the amorphous catalysts, which is eneficial for the improvement of activity. Moreover, surface chromium oxide can function as a Lewis acid, which lowers the 7r80 0rbital of the reactant. favoring a carbonyl group-bonded configuration. The best selectivity was achieved over the Ni-Cr-B2 catalyst, where the hydrogenation of the aromatic ring was thoroughly blocked before the saturation of the carbonyl groups.

Ni-Cr-B amorphous alloy， 2-Ethylanthraquinone， Hydrogenation， Hydrogen peroxide

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2009年12月23日

【期刊论文】Structural and catalytic properties of skeletal Ni catalyst prepared from the rapidly quenched Ni50Al50 alloy

乔明华， Huarong Hu， a Minghua Qiao， a， ∗ Shuai Wang， a Kangnian Fan， ∗ Hexing Li， b Baoning Zong， c and Xiaoxin Zhang c

Journal of Catalysis 221 (2004) 612-618，-0001，（）：

-1年11月30日

摘要

The textural and structural properties of a skeletal Ni catalyst prepared by alkali leaching of aluminum from the rapidly quenched Ni50Al50 alloy have been investigated by elemental analysis (ICP-AES), nitrogen physisorption, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and H2 thermal desorption techniques. As compared to Raney Ni, such a skeletal catalyst has a residual Ni2Al3 phase, lower surface area, higher average pore diameter and porosity, larger mean crystallite size, and unit-cell parameter. These differences are attributable to the metastable character of the pristine rapidly quenched alloy and their relationship with the catalytic behavior is discussed and correlated.

Rapid quenching， Ni-Al alloy， Skeletal catalyst， Raney Ni， Texture， Structure， Hydrogenation

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