In situ and real-time surface differential diffraction (SDD) study of Cd underpotential deposition on Au(1 1 1) |
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| Institution: | 1. School of Chemical Engineering, North China University of Science and Technology, Tangshan 063009, China;2. College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China;3. Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment, North China University of Science and Technology, Tangshan 063009, China;4. State Key Laboratory Breeding Base of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China;1. School of Materials Science and Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, China;2. Shanghai Innovation Institute for Materials, Shanghai University, Shanghai, China;1. Key Laboratory for Analytical Science of Food Safety and Biology (MOE & Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou 350108, PR China;2. Testing Center, Fuzhou University, Fuzhou 350108, PR China;1. University Medical Center Hamburg-Eppendorf, Department of Legal Medicine, Toxicology, Hamburg, Germany;2. University Medical Center Hamburg-Eppendorf, Department of Medical Biometry and Epidemiology, Hamburg, Germany;1. Guangxi Key Laboratory of Bioactive Molecules Research and Evaluation, College of Pharmacy, Guangxi Medical University, Nanning, 530021, PR China;2. School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, PR China;3. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510650, PR China;4. Health And Regimen School, Guangxi Vocational & Technical College, Nanning, 530226, PR China;5. Guangxi Engineering Center in Biomedical Material for Tissue and Organ Regeneration, Life Sciences Institute, Guangxi Medical University, Nanning, 530021, PR China |
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| Abstract: | In situ and real-time surface differential diffraction (SDD) has been used to study the underpotential deposition (UPD) of Cd on Au(1 1 1) in sulfuric acid media. Comparison of SDD results in sulfate electrolytes with and without the presence of Cd2+ ions reveals that the surface reconstruction associated with the sulfate adsorption and desorption dominates the structural effect. It is also found that the reconstructed gold surface is stable upon Cd UPD process. In the initial stages of UPD, Cd atoms bind to the surface in bridge sites. This is followed by an adlayer structure with Cd adsorption in threefold hollow sites before Au/Cd intermixing takes place. |
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