Effects of preparation conditions on the morphology and performance of palladium nanostructures |
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| Affiliation: | 1. School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China;2. The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy Technology of Guangdong Universities, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China;1. Institute of Computing Science and Technology, Guangzhou University, Guangzhou, 510006, China;2. Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA, 24060, USA;3. Department of Mechanical Engineering, Estahban Branch, Islamic Azad University, Estahban, Iran;4. Department of Electrical Engineering and Computer Science, Case Western Reserve University, Cleveland, OH, USA;1. Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;2. Program of Chemical Engineering, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;1. Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China;2. Guangzhou University-Linköping University Research Center on Urban Sustainable Development, Guangzhou University 510006 Guangzhou, China;3. Institute of Environmental Engineering, National Sun Yat-sen University, Gaoxiong 80424, Taiwan;4. Department of Environmental Science and Engineering, Tunghai University, Taichung 40704, Taiwan;5. Department of Civil Engineering, National Chi Nan University, Nanto 54561, Taiwan;1. Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, Gdansk, Poland;2. Faculty of Applied Physics and Mathematics, Gdansk University of Technology, Gdansk, Poland |
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| Abstract: | Three-dimensional palladium nanoflowers (Pd NF) composed of ultrathin Pd nanosheets had been synthesized by a solvothermal approach in our previous work. Here, the effects of preparation conditions on the morphology and electrochemical performance of palladium nanostructures were investigated. The explored conditions are as follows: the ratio of reducing agent to capping agent, the concentration of PdCl2 precursor, the amount of HCl (used for PdCl2 dissolution), the reaction temperature and time. Only when these conditions are strictly controlled, the obtained Pd material displays a uniformly nanoflower-like morphology, otherwise the Pd samples with nanoparticles or incomplete flowers can only be obtained. Then, the relationship between the morphology of Pd and its electrocatalytic activity was further studied. The results indicate that the Pd with perfect nanoflowers morphology possesses superior activity for formic acid electro-oxidation, while the Pd with incomplete flowers and ordinary (or irregular) particle morphology shows moderate and inferior activity. Therefore, the morphology-dependent electrocatalytic activity has been demonstrated in this work. |
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| Keywords: | Palladium nanoflower Preparation conditions Electrocatalytic Morphology -dependent activity |
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