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Journal of Central South University 2015年第5期22卷 1614-1618页

作者： PARK Sunghoon KIM Soohyun PARK Suyoung LEE Sangmin LEE Chongmu Department of Materials Science and Engineering Inha University 253 Yonghyun-dong Nam-gu Incheon 402-751 Korea Department of Electronic Engineering Inha University 253 Yonghyun-dong Nam-gu Incheon 402-751 Korea

The sensing performances of multiple networked Ga N nanowire(NW) sensor codecorated with Au and Pt nanoparticles were examined. The pristine Ga N nanowires show responses of approximately 108%-173% to 0.05%-0.25% H2 at room temperature. On the other hand, the Ga N nanowires decorated with Au and those decorated with Pt lead to 1.1-1.3 and 1.2-1.6 times,respectively, stronger responses to 0.05%-0.25% H2. In contrast, the Au Pt-codecorated Ga N nanowires show 1.3-2.0 times stronger responses to 0.05%-0.25% H2. In other words, the Ga N nanorods codecorated with Au and Pt nanoparticles show much stronger response to H2 gas than the Au or Pt monometal-decorated counterpart. The underlying mechanism for the enhanced response of the Au Pt-codecorated Ga N nanowire was discussed.

关键词： Ga N nanowires metal catalyst bimetallic system gas sensor codecoration

Photocatalysts for Photocatalytic CO_(2)Reduction:A Review

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China Petroleum Processing & Petrochemical Technology 2022年第1期24卷 149-160页

作者： Zhang Lizhong School of Materials Science and Engineering North University of ChinaTaiyuan 030051

Energy crisis and environmental pollution have become vitally severe challenges for the current *** the circumstances of pursuing carbon peak and carbon neutrality,photocatalytic CO_(2) reduction will be an essential,necessary and even inevitable development requirement and ***,there are some bottlenecks that need to be addressed immediately,such as low quantum efficiency and narrow light absorption range for single ***,efficient and stable visible light driving materials are the core challenge in the field of photocatalytic CO_(2) *** paper reviewed the photocatalysts used for CO_(2) reduction classified as metal photocatalysts,non-metal photocatalysts,and MOFs photocatalysts,and the CO_(2) reduction capacity and mechanism of different photocatalysts were *** the end,the problems to be solved and the future development of photocatalytic CO_(2) reduction were summarized.

关键词： photocatalysis CO_(2)reduction metal catalyst non-metal catalyst

Growth of silicon nanowires in aqueous solution under atmospheric pressure

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Nano Research 2014年第6期7卷 898-902页

作者： Nae-Man Park Chel-Jong Choi Components and Materials Laboratory Electronics and Telecommunications Research Institute (ETRI) 161 Gajeong-dong Yuseong-gu Daejeon 305-700 Republic of Korea School of Semiconductor and Chemical Engineering Semiconductor Physics Research Center Chonbuk National University 664-14 Deokjin-dong Deokjin-gu Jeonju 561-756 Republic of Korea

A new method for growing silicon nanowires is presented. They were grown in an aqueous solution at a temperature of 85℃ under atmospheric pressure by using sodium methylsiliconate as a water-soluble silicon precursor. The structure, morphology, and composition of the as-grown nanowires were characterized by scanning electron microscopy, transmission electron microscopy, and energy dispersive X-ray spectrometry. It was also confirmed by X-ray powder diffraction and Raman spectroscopy that the silicon nanowire has a hexagonal structure. It was possible to grow the crystalline silicon nanowires at low temperature under atmospheric pressure because potassium iodide, which was used as a gold etchant, sufficiently increased the surface energy and reactivity of gold as a metal catalyst for the reaction of the Si precursor even at low temperature.

关键词： Silicon nanowire solution process metal catalyst hexagonal crystalline phase

Pretreatment of apramycin wastewater by catalytic wet air oxidation

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Journal of Environmental Sciences 2005年第4期17卷 623-626页

作者： YANGShao-xia FENGYu-jie WANJia-feng LINQing-ying ZHUWan-peng JIANGZhan-peng DepartmentofEnvironmentalScienceandEngineering TsinghuaUnivershyBeijing100084China SchoolofMunicipalandEnvironmentalEngineering HarbinInstituteofTechnologyHarbin150001China

The pretreatment technology of wet air oxidation(WAO) and coagulation and acidic hydrolysis for apramycin wastewater was investigated in this paper. The COD, apramycin, NH^+_4 concentration, and the ratio of BOD_5/COD were analyzed, and the color and odor of the effluent were observed. WAO of apramycin wastewater, without catalyst and with RuO_2/Al_2O_3 and RuO_2-CeO_2/Al_2O_3 catalysts, was carried out at degradation temperature of 200℃ and the total pressure of 4 MPa in a 1 L batch reactor. The result showed that the apramycin removals were respectively 50 2% and 55 0%, COD removals were 40 0% and 46 0%, and the ratio of BOD_5/COD was increased to 0 49 and 0 54 with RuO_2/Al_2O_3 and RuO_2-CeO_2/Al_2O_3 catalysts in catylytic wet air oxidation(CWAO) after the reaction of 150 min. With the pretreatment of coagulation and acidic hydrolysis, COD and apramycin removals were slight decreased, and the ratio of BOD_5/COD was increased to 0 45, and the effluents was not suitable to biological treatment. The color and odor of the wastewater were effectively controlled and the reaction time was obviously shortened with WAO. HO_2· may promote organic compounds oxidized in WAO of the apramycin wastewater. The addition of CeO_2 could promote the activity and stability of RuO_2/Al_2O_3 in WAO of apramycin wastewater.

关键词： catalytic wet air oxidation(CWAO) metal catalyst antibiotic production wastewater apramycin wastewater

Flower-like 3D CuO microsphere acting as photocatalytic water oxidation catalyst

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Chinese Journal of Catalysis 2016年第1期37卷 123-134页

作者：杜晓强黄静伟丰营营丁勇兰州大学化学化工学院甘肃省有色金属重点实验室功能有机分子国家重点实验室甘肃兰州730000 中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室甘肃兰州730000

Flower-like 3D CuO microspheres were synthesized and used to photo-catalyze water oxidation under visible *** structure of the CuO microspheres was characterized by scanning electron microscopy,transmission electron microscopy,infrared,powder X-ray diffraction,electron dispersive spectroscopy,Raman and X-ray photoelectron spectroscopy（XPS）.This is the first time that a copper oxide was demonstrated as a photocatalytic water oxidation catalyst under near neutral *** catalytic activity of CuO microspheres in borate buffer shows the best performance with O2 yield of 11.5%.No change in the surface properties of CuO before and after the photocatalytic reaction was seen by XPS,which showed good catalyst stability.A photocatalytic water oxidation reaction mechanism catalyzed by the CuO microspheres was proposed.

关键词： Photocatalysis Water oxidation metal catalyst CuO microsphere Stability

Reversible transformation between terrace and step sites of Pt nanoparticles on titanium under CO and O_(2) environments

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Chinese Journal of Catalysis 2022年第8期43卷 2026-2033页

作者： Yang Ou Songda Li Fei Wang Xinyi Duan Wentao Yuan Hangsheng Yang Ze Zhang Yong Wang Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China c University of Chinese Academy of Science Beijing 100049China

Understanding the dynamic evolution of active sites of supported metal catalysts during catalysis is fundamentally important for improving its performance,which attracts tremendous research interests in the past *** are two main surficial structures for metal catalysts:terrace sites and step sites,which exhibit catalytic activity discrepancy during ***,by using in situ transmission electron microscopy and in situ Fourier transform infrared spectroscopy(FTIR),the transformation between surface terrace and step sites of Pt-TiO_(2) catalysts was studied under CO and O_(2) *** found that the{111}step sites tend to form at{111}terrace under O_(2) environment,while these step sites prefer to transform into terrace under CO environment at elevated ***,quantitative ratios of terrace/step sites were obtained by in situ *** was found that this transformation between terrace sites and step sites was reversible during gas treatment cycling of CO and O_(2).The selective adsorption of O_(2) and CO species at different sites,which stabilized the step/terrace sites,was found to serve as the driving force for active sites transition by density functional theory *** by the in situ results,an enhanced catalytic activity of Pt-TiO_(2) catalysts was successfully achieved through tuning surface-active sites by gas treatments.

关键词： In situ transmission electron microscopy Surface reconstruction metal catalyst Active site CO oxidation reaction

Coordination environment of active sites and their effect on catalytic performance of heterogeneous catalysts

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Chinese Journal of Catalysis 2022年第4期43卷 928-955页

作者： Chunpeng Wang Zhe Wang Shanjun Mao Zhirong Chen Yong Wang Advanced Materials and Catalysis Group Institute of CatalysisZhejiang UniversityHangzhou 310028ZhejiangChina College of Chemical and Biological Engineering Zhejiang UniversityHangzhou 310028ZhejiangChina Center of Chemistry for Frontier Technologies Zhejiang UniversityHangzhou 310028ZhejiangChina

The structural complexity of supported metal catalysts,playing significant role in a wide range of chemical technologies,have prevented us from deeply understanding their catalytic mechanisms at atomic level.A fundamental understanding of the nature of active sites and structure–performance relationship of supported metal catalysts from a comprehensive view will open up numerous new opportunities for the development of advanced catalysts to address the global challenges in energy conversion and environmental *** review surveys the effects of multiple factors,including the metal size,shape,support,alloy and ligand modifier,on the coordinated environment of active center and further their influence on the catalytic reactions,aiming to provide guidance for the design of industrialized heterogeneous catalysts with extraordinary ***,the key structure characterization techniques in determining the coordination structure of active metal sites,especially the dynamic coordination structure change under the reaction condition,are well summarized.A brief summary is finally provided together with personal perspectives on the further development in the field of heterogeneous metal catalysts.

关键词： Heterogeneous catalysis Supported catalyst Coordination environment metal catalyst In‐situ characterization

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

Theoretical study on the application of the largest aluminum-pyrazole ring in electrochemical nitrogen reduction reaction

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Chinese Chemical Letters 2023年第12期34卷 339-342页

作者： Zirui Wang Sihao Shen Yupeng Han Weihui Fang Qiaohong Li Jian Zhang State Key Laboratory of Structural Chemistry.Fujian Institute of Research on the Structure of Matter Chinese Academy of SciencesFuzhou 350002China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Chinese Academy of Sciences University of Chinese Academy of SciencesBeijing 100049China Fujian College University of Chinese Academy of SciencesFuzhou 350002China

Electrochemical nitrogen reduction reaction(NRR)is a mild and sustainable method for ammonia ***,developing high activity,selectivity,and economic efficiency catalysts with considering the synergistic effects between catalysts and carriers to design novel structural models is very *** the non-noble metal NRR catalyst,Mo3,we tried to find a suitable carrier which is stable and ***,we used the largest atomically precise aluminum-pyrazole ring(AlOC-69)to date(diameter up to 2.3 nm).The larger ring cavities and the presence of abundant hydroxy groups make AlOC-69 an ideal molecular carrier model and provide a basis for studying its structure-activity *** formation energy(-0.76eV)and stable Mo-0 bonds indicate that Mo_(3)can be stabilized on the Al_(10)O_(10)***,N_(2)has fully activated due to the strong interaction between the p-orbital of N and the d-orbital of *** low limiting potential(-0.28V)emerges that Mo_(3)@Al_(10)O_(10)has ideal catalytic activity and *** research provides a promising catalyst model and an understanding of its catalytic process at the atomic level,providing a new approach for the co-design of catalyst and carrierin NRR.

关键词： Nitrogen reduction reaction Hydrogen evolution reaction Electrocatalysts Densityfunctional theory Aluminum-pyrazolering metal catalyst

Catalytic Properties of Polymer-bound Imine Copper(Ⅱ) Complex

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Chemical Research in Chinese Universities 2001年第Z1期17卷 123-页

作者： WANG YunPu Institute of polymer Northwest Normal University Chemistry and Chemical Engineering College Qiqihar University.

As heterogeneous catalyst, polymer metal complexes is stable in air, low corrosive, low toxic, easy to separate and reclaim,1,2 which superior than organic metal low-molecular complexes, so be paid close attention since 1960' and apply in industry gradually. There are many reports in polymer metal catalyst which is used in oxidation and hydrogenation3　　In this paper, complexes of Cu(II) with polymer schiff base ligand: poly (dinitrobenzaldehyde aminating styrene)-Cu(PDNBA-Cu), poly(m-nitrobenzaldehyde aminating styrene)-Cu(PMNBA-Cu), poly(dihydroxybenzaldehyde aminating styrene)Cu(PDHBA-Cu), PDNBA-Cu-Phen were synthesized and characterized by FT-IR, XPS, GC-MS and element analysis. The results show that oxygen atom of hydroxide radical and nitrogen atom are both coordinating with Cu2+ and N:Cu≈ 1: 1. The results also show the complexes are well stability.　　……

关键词： synthesized and characterized heterogeneous catalyst schiff base ligand element analysis metal complexes metal catalyst oxygen atom used in