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2009年12月23日

【期刊论文】Skeletal Ni catalysts prepared from Ni-Al alloys rapidly quenched at different rates: Texture, structure and catalytic performance in chemoselective hydrogenation of 2-ethylanthraquinone

乔明华， Huarong Hu a， Fuzhong Xie a， Yan Pei a， Minghua Qiao a， ∗， Shirun Yana， Heyong He a， Kangnian Fan a， Hexing Li b， Baoning Zong c， Xiaoxin Zhang c

Journal of Catalysis 237 (2006) 143-151，-0001，（）：

-1年11月30日

摘要

Skeletal Ni catalysts (RQ Ni) prepared by alkali leaching of rapidly quenched Ni–Al alloys have been systematically characterized, focusing on the effect of the cooling rate during alloy preparation. It is found that the residual Al content, texture, structure, surface hydrogen species, and active sites of the RQ Ni catalysts can be controlled by the cooling rate of the Ni–Al alloys. In liquid-phase hydrogenation of 2-ethylanthraquinone (eAQ), the RQ Ni catalyst with higher cooling rate favors hydrogenation of the carbonyl group and retards the saturation of the aromatic ring and the formation of the degradation products, thus leading to a higher yield of H2O2. Based on the characterizations, the improved selectivity is ascribed to the dominant population of strongly chemisorbed hydrogen, which is inactive for the hydrogenation of the aromatic ring, along with the electronic interaction between residual metallic Al and Ni, favoring a carbonyl group-bonded configuration of eAQ on the catalyst.

Skeletal Ni， Rapid quenching， Cooling rate， Ni-Alalloy， eAQ， Hydrogenation， H2O2

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2010年12月14日

【期刊论文】Skeletal Ni Catalyst Prepared from a Rapidly Quenched Ni-Al Alloy and Its High Selectivity in 2-Ethylanthraquinone Hydrogenation

乔明华， Bo Liu， ¤ Minghua Qiao， ¤ Jing-Fa Deng， ¤ Kangnian Fan， ¤ Xiaoxin Zhang， y and Baoning Zongy

Journal of Catalysis 204, 512-515 (2001)，-0001，（）：

-1年11月30日

摘要

A novel skeletal Ni catalyst, prepared by alkali leaching of a Ni-Al alloy obtained by the rapid quenching technique, exhibited higher selectivity in hydrogenation of 2-ethylanthraquinone to "active quinones" than that of the Raney Ni catalyst originating from a conventional alloy. It is suggested that the structural defects of the rapidly quenched alloy lead to a high population of the strongly bound hydrogen, which is essential for selective hydrogenation of the carbonyl group.

skeletal Ni， rapid quenching， 2-ethylanthraquinone， hydrogenation， hydrogen peroxide.，

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2010年12月14日

【期刊论文】Selective hydrogenation of 2-ethylanthraquinone over an environmentally benign Ni-B/SBA-15 catalyst prepared by a novel reductant-impregnation method

乔明华， Xueying Chen， Huarong Hu， Bo Liu， Minghua Qiao， ? Kangnian Fan， and Heyong He ?

Journal of Catalysis 220(2003)254-257，-0001，（）：

-1年11月30日

摘要

An environmentally benign SBA-15-supported amorphous nickel boride alloy catalyst, prepared by a novel reductant–impregnation method, exhibits superior activity, selectivity, and stability in the selective hydrogenation of 2-ethylanthraquinone (eAQ) to 2-ethylanthrahydroquinone (H2eAQ), which is the dominating process for the production of hydrogen peroxide in industrial scale. The unique characters of the amorphous alloy as well as the pore structure of the mesoporous SBA-15 molecular sieve are crucial for the excellent catalytic behavior of the title catalyst.

Ni-B， Mesoporous molecular sieve， SBA-15， eAQ， Hydrogenation， H2O2

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2010年12月14日

【期刊论文】Discrimination of the roles of CdSO4 and ZnSO4 in liquid phase hydrogenation of benzene to cyclohexene

乔明华， Jian-Liang Liu a， Yuan Zhu a， Jun Liu a， Yan Pei a， Zhen Hua Li a， *， Hui Li b， He-Xing Li b， Ming-Hua Qiao a， Kang-Nian Fan a

Journal of Catalysis 268(2009)100-105，-0001，（）：

-1年11月30日

摘要

CdSO4 and ZnSO4 as co-modifiers of RuLa/SBA-15 lead to improved catalysts for the partial hydrogenation of benzene to cyclohexene. Based on the experimental results and theoretical calculations, it is shown that CdSO4 acts as surface modification, suppressing more the adsorption of cyclohexene than that of benzene, while the function of ZnSO4 is mainly the stabilization of cyclohexene in the liquid phase, accelerating the desorption as well as hindering the re-adsorption of cyclohexene.

Benzene.， Cyclohexene,， Hydrogenation,， CdSO4,， ZnSO4

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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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