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Chinese Chemical Letters 2014年第6期25卷 839-843页

作者： Xin Zhang Hua-Yan Yang Xiao-Jing Zhao Yu Wang Nan-Feng Zheng State Key Laboratory for Physical Chemistry of Solid Surfaces Xiamen University Department of Chemistry College of Chemistry and Chemical EngineeringXiamen University

The stabilities of [M12Ag32（SR）30]4- （M = Ag, Au and SR = SPhF2, SPhCF3, SPhF） clusters having the same structure but different surface ligands or counter cations were systematically studied. It was clearly revealed that a subtle structural change in the surface ligands or counter cations could significantly alter the overall stability of [M12Ag32（SR）30]4 although they all had an electronic structure of 18-electron superatom shell closure. SPhF2 was found as a better surface ligand than SPhCF3 or SPhF to stabilize [M12Ag32（SR）30]4-. And the use of more bulky [（PPhj）2N]＋ as the counter cations was revealed to be more deleterious to the overall stability of [M12Ag32（SR）30]4- clusters than PPh4＋. [Au12Ag32（SR）30]4- was much more stable than [Ag44（SR）30]4 with the same surface ligands and counter cations. An exceptional stability was observed on （PPh4）4[Au12Ag32（SPhF2）30] which was stable in DMF for more than 8 days in air at 80 ℃. More research efforts are still needed to deeply understand why a small structural change could result in a significant change in the stability of noble metal nanoclusters.

关键词： Nanoclusters Stability Ligand effect noble metal

Catalytic methanation reaction over supported nickel-rhodium oxide for purification of simulated natural gas

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Journal of Natural Gas Chemistry 2011年第6期20卷 585-594页

作者： Wan Azelee Wan Abu Bakar Rusmidah Ali Susilawati Toemen Department of Chemistry Faculty of ScienceUniversiti Teknologi Malaysia

In this research,new catalyst with high industrial impact is developed,which can catalyze the conversion of CO2 to methane through methanation reaction.A series of catalysts based on nickel oxide were prepared using wetness impregnation technique and ageing,followed by calcination at 400℃.Rh/Ni（30：70）/Al2O3 catalyst was revealed as the most potential catalyst based on the results of catalytic activity measurement monitored by Fourier Transform Infrared Spectroscopy（FTIR）and Gas Chromatography（GC）.The results showed 90.1%CO2 conversion and 70.8% yield at 400℃.

关键词： noble metal nickel oxide catalyst carbon dioxide methanation

Defect-Rich,Candied Haws-Shaped AuPtNi Alloy Nanostructures for Highly Efficient Electrocatalysis

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CCS Chemistry 2020年第1期2卷 24-30页

作者： Xiaoya Cui Zhicheng Zhang Yue Gong Faisal Saleem Bo Chen Yonghua Du Zhuangchai Lai Nailiang Yang Bing Li Lin Gu Hua Zhang Department of Chemistry City University of Hong KongHong KongChina Center for Programmable Materials School of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190ChinaSchool of Physical SciencesUniversity of Chinese Academy of SciencesBeijing 100049China National Synchrotron Light Source II Brookhaven National LaboratoryUpton 11973NYUSA State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of Sciences Beijing 100190China Institute of Materials Research and Engineering(IMRE) A*STAR(Agency for ScienceTechnology and Research)Singapore 138634Singapore

The rational design and synthesis of multimetallic nanostructures(NSs)with rich defects are of significant importance for their diverse applications,including their promising usage as high-efficiency catalysts for alcohol oxidation reaction as a fuel source.Here,we report the synthesis of defect-rich,candied haws-shaped AuPtNi NSs using presynthesized gold(Au)nanowires as templates.The ternary AuPtNi NSs possess rich defects such as twins,stacking faults,and atomic steps.Impressively,the AuPtNi NSs exhibited excellent mass and specific activities toward methanol and ethanol oxidation reactions under acidic conditions.Our current work paves the way for the rational design and controlled synthesis of defect-rich multimetallic NSs to boost their performances in catalytic reactions.

关键词： noble metal alloy multimetallic nanostructure defect electrocatalysis

Platinum and Iridium Coatings Obtained by Double Glow Plasma Technology

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贵金属 2012年第A1期33卷 146-153页

作者： WU Wangping CHEN Zhaofeng CHEN Zhou CONG Xiangna QIU Jinlian College of Material Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Pt and Ir coatings were produced by double glow plasma technology on the surface of Ti alloy substrates. The chemical compositions of the coatings were determined by X-ray diffraction and X-ray photoelectron spectroscopy. The microstructure and morphology of the coatings were observed by scanning electron microscopy. The hardness and elastic modulus of the coatings were estimated by nanoindentation. The measurements of adhesive forces of the coatings were performed with scratch tester. The results indicated that the Pt and Ir coatings displayed the preferred (220) orientation due to the initial nuclei with preferred growth on the surface of the substrates. The interface between the Pt coating and substrate exhibited no evidence of delamination. The Ir coating was composed of irregular columnar grains with many nanovoids at the interface between the coating and substrate. The mean values of hardness for Pt and Ir coatings were 0.9 GPa and 9 GPa, respectively. The elastic modulus of Pt and Ir coatings were 178 GPa and 339 GPa, respectively. The adhesive forces of the Pt and Ir coatings were about 66.4 N and 55 N, respectively. The Pt and Ir coatings adhered well to the Ti alloy substrates.

关键词： noble metal coating platinum iridium double glow plasma

A Review on Complete Oxidation of Methane at Low Temperatures

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Journal of Natural Gas Chemistry 2003年第3期12卷 153-160页

作者： ZhenhuaLi GarB.Hoflund StateKeyLabofC1ChemistryandTechnology SchoolofChemicalEngineeringTianjinUniversityTianjin300072China DepartmentofChemicalEngineering UniversityofFloridaUSA

This paper reviews recent developments in complete oxidation of methane atlow temperatures over noble metal catalysts in the past 20 years. The Pd/Al_2O_3 catalyst system isfully discussed. The review mainly focuses on the kinetic aspects of methane oxidation over thiscatalyst, and methane activation behavior over Pd and PdO phases (the form of PdO on the surface,transient behavior, the nature of the active sites, the influence of metal particle size and theirstructure sensitivities, and so on). Some Pd catalysts supported on other oxides besides the Al_2O_3support are briefly discussed. Possible routes of non-noble metal catalysts as substitutes for thePd catalyst are also proposed.

关键词： methane complete oxidation review Pd low temperature noble metal

Perovskite-type Mixed Oxides Catalyst for Complete Oxidation of Acetone

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Chemical Research in Chinese Universities 2001年第Z1期17卷 204-205页

作者： DUAN ZhiYing Institute of Chemistry and Chemical Engineering Lanzhou University

The catalytic oxidation of VOCs (volatile organic compounds) is an attractive subject in the field of environmental protection now. Furthermore, most countries have made out regulations m controlling the maximum content of VOCs in some places. Presently, the leading way of domestic and foreign means to eliminate VOCs is to completely oxidize VOCs into carbon dioxide and water in presence of noble metal catalyst. But noble metal is expensive for lack of resource[2]. So it is insistent to research a low-cost catalyst for removal of VOCs. In this work, we have used some base metals (such as La, Sr, Ce, Ni, Cu) to synthesize mixed oxides catalyst supported on γ-A12O3. We have investigated the catalytic properties in the complete oxidation of acetone over the catalyst prepared and achieved an exciting result.

关键词： environmental protection noble metal catalytic properties catalytic oxidation complete oxidation organic compounds metal catalyst carbon dioxide base metals

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离子交换树脂在湿法冶金中的应用

离子交换与吸附 1993年第3期 250-260页

作者：马建标何炳林南开大学高分子化学研究所南开大学高分子化学研究所天津 300071

本文简要综述了离子交换树脂在贵金属、稀有金属、稀土金属、铀及其它放射性核素等金属的湿法提取分离与纯化中的应用。

关键词： ion exchange resins hydrometallurgy noble metal rare-earth metal uranium.

Preparation of Plasmonic Au Superstructures for Significantly Visible-light-enhanced Catalytic Reactions

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Preparation of Plasmonic Au Superstructures for Significantl...