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Adsorption and corrosion inhibition behavior of imidazole on cobalt electrodes studied by SERS and electrochemical methods

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Science china chemistry 2005年第6期48卷 497-503页

作者： GU Wei1, LIU Guokun2, ren bin2, WU Deyin2, GU renao1 & TIAN Zhongqun2 1. Department of chemistry, college of chemistry and chemical engineering, Suzhou university, Suzhou 215006, china 2. state key laboratory for physical chemistry of solid surfaces and Department of chemistry, college of chemistry and chemical engineering, xiamen university, xiamen 361005, china 1. Department of chemistry College of Chemistry and Chemical Engineering Suzhou University 215006 Suzhou China 2. state key laboratory for physical chemistry of solid surfaces and Department of chemistry College of Chemistry and Chemical Engineering Xiamen University 361005 Xiamen China

The interaction of imidazole with Co electrodes in an electrochemical system was studied by surface-enhanced Raman scattering (SERS) and electrochemical methods. The SER spectra of Co in an imidazole solution as a function of the applied potential were analyzed and the assignment of the Raman bands was made. It was found that there were three kinds of sur-face species on the Co surface in different potential regions and they were interchangeable de-pending on the potential. In a relatively negative potential region (?1.2 to ?0.9 V), imidazole was adsorbed on the surface and its orientation might change from a vertical configuration via the N-end of the pyridine ring to a tilted configuration via the C2=N3 double bond. In a more positive potential region (?0.8 to ?0.7 V), the SERS signal from the adsorbed imidazole weakened and finally disappeared, meanwhile the signal from the Co and imidazole complex strengthened gradually. At the open circuit potential (?0.6 V), we detected very strong bands from the Co ox-ides. By comparing the Tafel curves of the Co electrode in the solution without and with imidazole, we found that imidazole has a marked effect on the corrosion inhibition of the Co electrode. This result demonstrates that we may be able to reveal the complicated interaction of surface species with metal surface at the molecular level by combining the SERS and electrochemical methods.

关键词： cobalt, imidazole, inhibition, surface-enhanced Raman spectroscopy, Tafel plot.

Synthesis and Magnetic Properties of Polynuclear heterometailic metal clusters

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Synthesis and Magnetic Properties of Polynuclear heterometai...

Optical responses of metallic plasmonic arrays under the localized excitation

中国化学会第五届全国结构化学学术会议

作者： Xiang-Jian Kong Yan-Ping ren La-Sheng Long~* Rong-bin Huang Lan-Sun Zheng state key laboratory of physical chemistry of solid Surface and Department of chemistry,college of chemistry and chemical engineering,xiamen university,xiamen 361005,china.

＜正＞Polynuclear heterometallic metal clusters,such as,3d-4f and 3d-5f ones,are of currently interest, due to their often exhibiting unique magnetic property and good models for the investigation on the nature of the...

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Nano Research 2024年第3期17卷 1571-1577页

作者： Sen Yan Hao Ma Yi-Fan Bao Maofeng Cao Chuan Liu Kaifeng Zhang Xiaowei Wu Jianbo He Xiang Wang bin ren state key laboratory of physical chemistry of solid surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Innovation laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China Research&Development Group HitachiLtd.Yokohama 244-0817KanagawaJapan Department of Electronic Science and engineering Kyoto UniversityKyoto 615-8510Japan

The metallic plasmonic array that can support both propagating surface plasmon polaritons(PSPPs)and localized surface plasmon resonance(LSPR)possesses rich optical properties and remarkable optical performance,making it a powerful platform for applications in photonics,chemistry,and *** practical applications,the excitation spot is usually smaller than the area of metal *** is thus imperative to address“how many array units are enough?”towards a rational design of plasmonic ***,we employed focused ion beam(FIB)to precisely fabricate a series of plasmonic array structures with increased unit *** utilizing photoluminescence(PL)and surface-enhanced Raman spectroscopy(SERS),we found that the array units outside the excitation spot still have a significant impact on the optical response within the *** with the numerical simulation,we found that the boundary of the finite array leads to the loss of PSPP outside the excitation point,which subsequently affects the coupling of PSPP and LSPR in the excitation spot,leading to variations in PL and SERS *** on the findings,we further tuned the LSPR mode of the metal arrays by electrodeposition to obtain strong near-field enhancement without any influence on the PSPP *** work advances the understanding of near-field and far-field optical behavior in finite-size array structures and provides guidance for designing highly-efficient photonic devices.

关键词： plasmonic periodic array finite-size effects dark field scattering surface-enhanced Raman spectroscopy(SERS)

MOF-derived Cu embedded into N-doped mesoporous carbon as a robust support of PdAu nanocatalysts for ethanol electrooxidation

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Rare Metals 2024年第3期43卷 1083-1094页

作者： Yu-Fu Huang Peng Wu Jun-Ping Tang Jian Yang Jing Li Shuai Chen Xue-Ling Zhao ChengChen bin-Wei Zhang Yan-Yun Ma Wei-Heng Shi Dong-Hai Lin Shi-Gang Sun School of Energy and Materials Shanghai Engineering Research Center of Advanced Thermal Functional MaterialsShanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai201209China state key laboratory of physical chemistry of solid surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China School of chemistry and chemical engineering Chongqing UniversityChongqing401331China Center of Advanced Energy Technology and Electrochemistry Institute of Advanced Interdisciplinary StudiesChongqing UniversityChongqing400044China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China Department of Materials Science and engineering Drexel UniversityPhiladelphiaPA19104USA

Metal-organic frameworks(MOFs)h ave attracted widespread attention due to their large surface area and porous *** designing the nanostructures of MOFs to promote their application in ethanol electrooxidation is still a ***,a novel Cu-NCNs(Cu-nitrogen-doped carbon nanotubes)support was synthesized by pyrolysis of melamine(MEL)and Cu-ZIF-8 together,and then,Pd-Au nanoalloys were loaded by sodium borohydride reduction method to prepare PdAu@Cu-NCNs *** generating mesoporous carbon with high specific surface area and favorable electron and mass transport can be used as a potential excellent carrier for PdAu *** addition,the balance of catalyst composition and surface structure was tuned by controlling the content of Pd and ***,the best-performed Pd_(2)Au_(2)@Cu-NCN-1000-2(where 1000 means the carrier calcination temperature,and 2 means the calcination constant temperature time)catalyst exhibits better long-term stability and electrochemical activity for ethanol oxidation in alkaline media(4.80 A·mg^(-1)),which is 5.05 times higher than that of commercial Pd/C(0.95 A·mg^(-1)).Therefore,this work is beneficial to further promoting the application of MOFs in direct ethanol fuel cells(DEFCs)and can be used as inspiration for the design of more efficient catalyst support structures.

关键词： Metal-organic frameworks(MOFs) N-doped Mesoporous carbon PdAu Ethanol electrooxidation

Surface bonding on silicon surfaces as probed by tip-enhanced Raman spectroscopy

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Science china chemistry 2010年第2期53卷 426-431页

作者： ZHUANG MuDe LIU Zheng ren bin TIAN ZhongQun state key laboratory of physical chemistry of solid surfaces and Department of chemistry College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Tip-enhanced Raman spectroscopy (TERS) has been used to obtain the Raman signal of surface species on silicon single crystal surfaces without the necessity for surface enhancement by addition of Ag nanoparticles. By illuminating the hydrogen terminated silicon surface covered with a droplet of 4-vinylpyridine with UV light, a 4-ethylpyridine modified silicon surface can be easily obtained. By bringing a scanning tunneling microscope (STM) Au tip with a nanoscale tip apex to a distance of ca. 1 nm from the modified silicon surface, enhanced Raman signals of the silicon phonon vibrations and the surface-bonded 4-ethylpyridine were obtained. The Raman enhancement factor was estimated to be close to 107. By comparing the surface enhanced Raman scattering (SERS) signal obtained after surface enhancement with Ag nanoparticles and the TERS signal of the surface, the advantage of TERS over SERS for characterizing the surface species on substrates becomes apparent: TERS readily affords vibrational information about the system without disturbing it by surface enhancement. In this sense, TERS can be considered a truly non-invasive tool which is ideal for characterizing the actual surface species on substrates.

关键词： tip-enhanced Raman spectroscopy silicon single crystal 4-ethylpyridine surface modification

Surface plasmon-enhanced photochemical reactions on noble metal nanostructures

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Science china chemistry 2015年第4期58卷 574-585页

作者： De-Yin Wu Meng Zhang Liu-bin Zhao Yi-Fan Huang bin ren Zhong-Qun Tian state key laboratory of physical chemistry of solid surfaces Department of chemistry College of Chemistry and Chemical Engineering Collaborative Innovation Center of Chemistry for Energy Materials Xiamen University

Nanoscale noble metals can exhibit excellent photochemical and photophysical properties, due to surface plasmon resonance(SPR) from specifically collective electronic excitations on these metal surfaces. The SPR effect triggers many new surface processes, including radiation and radiationless relaxations. As for the radiation process, the SPR effect causes the significant focus of light and enormous enhancement of the local surface optical electric field, as observed in surface-enhanced Raman spectroscopy(SERS) with very high detection sensitivity(to the single-molecule level). SERS is used to identify surface species and characterize molecular structures and chemical reactions. For the radiationless process, the SPR effect can generate hot carriers, such as hot electrons and hot holes, which can induce and enhance surface chemical reactions. Here, we review our recent work and related literature on surface catalytic-coupling reactions of aromatic amines and aromatic nitro compounds on nanostructured noble metal surfaces. Such reactions are a type of novel surface plasmon-enhanced chemical reaction. They could be simultaneously characterized by SERS when the SERS signals are assigned. By combining the density functional theory(DFT) calculations and SERS experimental spectra, our results indicate the possible pathways of the surface plasmonenhanced photochemical reactions on nanostructures of noble metals. To construct a stable and sustainable system in the conversion process of the light energy to the chemical energy on nanoscale metal surfaces, it is necessary to simultaneously consider the hot electrons and the hot holes as a whole chemical reaction system.

关键词： surface plasmon resonance plasmon-enhanced chemical reaction p-aminothiophenol density functional theory noble metal nanostructures

Advanced surface engineering of titanium materials for biomedical applications:From static modification to dynamic responsive regulation

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Bioactive Materials 2023年第9期27卷 15-57页

作者： Pinliang Jiang Yanmei Zhang ren Hu bin Shi Lihai Zhang Qiaoling Huang Yun Yang Peifu Tang Changjian Lin South china Advanced Institute for Soft Matter Science and Technology School of Emergent Soft MatterGuangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and DevicesSouth China University of TechnologyGuangzhou510640China state key Lab of physical chemistry of solid surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China Department of Orthopaedics General Hospital of Chinese PLABeijing100853China Research Institute for Biomimetics and Soft Matter Fujian Provincial Key Laboratory for Soft Functional Materials ResearchCollege of Physical Science and TechnologyXiamen UniversityXiamen361005China

Titanium(Ti)and its alloys have been widely used as orthopedic implants,because of their favorable mechanical properties,corrosion resistance and *** their significant success in various clinical applications,the probability of failure,degradation and revision is undesirably high,especially for the patients with low bone density,insufficient quantity of bone or osteoporosis,which renders the studies on surface modification of Ti still active to further improve clinical *** is discerned that surface physicochemical properties directly influence and even control the dynamic interaction that subsequently determines the success or rejection of orthopedic ***,it is crucial to endow bulk materials with specific surface properties of high bioactivity that can be performed by surface modification to realize the *** article first reviews surface characteristics of Ti materials and various conventional surface modification techniques involving mechanical,physical and chemical treatments based on the formation mechanism of the modified *** conventional methods are able to improve bioactivity of Ti implants,but the surfaces with static state cannot respond to the dynamic biological cascades from the living cells and ***,beyond traditional static design,dynamic responsive avenues are then *** dynamic stimuli sources for surface functionalization can originate from environmental triggers or physiological *** short,this review surveys recent developments in the surface engineering of Ti materials,with a specific emphasis on advances in static to dynamic functionality,which provides perspectives for improving bioactivity and biocompatibility of Ti implants.

关键词： Titanium materials Orthopedic implants Bioactivity Static modification Dynamic responsive regulation

Monitoring the nanoscale reaction driven by the synergistic plasmonic and electrocatalytic effect by EC-TERS

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Monitoring the nanoscale reaction driven by the synergistic ...

Angle-resolved spectroscopy study on plamonic nanostructure

第十九届全国光散射学术会议

作者： Sheng-Chao Huang Xiang Wang Zhi-Cong Zeng bin ren state key laboratory of physical chemistry of solid surfaces Collaborative Innovation Center of Chemistry for Energy Materials College of Chemistry and Chemical Engineering Xiamen University

＜正＞There are increasing interests of combining light with electrochemistry to lower the reaction barrier and drive chemical reactions synergistically at a high catalytic ***,plasmon-driven chemical reactions have

关键词： Tip-enhanced Raman surface plasmon assisted catalysis electrocatalysis nano-reaction

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Angle-resolved spectroscopy study on plamonic nanostructure