| Study of CH4 and CO oxidation from electrochemical method |
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| 作者姓名： | ZHU Junjiang YANG Xiangguang XU Xuelian WEI Kemei |
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| 作者单位： | [1]National Research Center of Chemical Fertilizer Catalysts, Fuzhou University, Fuzhou 350002, China [2]Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China [3]College of Chemistry ＆ Chemical Engineering, Fuzhou University, Fuzhou 350002, China |
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| 基金项目： | This work was supported by the Ministry of Science and Technology of China （Grant No. 2004CB719502） and the National Natural Science Foundation of China （Grant No. 20177022）. |
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| 摘 要： | THE TWO FACTORS USED FOR EVALUATING THE QUALITY OF CATALYST ARE I) THE AMOUNT OF ACTIVE SITE PARTICIPATING IN THE REACTION, I.E. THE AREA OF REDOX PEAKS; AND II) THE REGENERATION FREQUENCY OF ACTIVE SITE IN THE REACTION, I.E. THE MATCH OF REDOX POTENTIALS. THE CONTRIBUTION OF EACH FACTOR HAS ITS OWN STRONG POINT IN DIFFERENT REACTIONS, WHILE CYCLIC VOLTAMMETRY (CV) IS A SUITA…
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| 关 键 词： | 甲烷 一氧化碳 氧化反应 电化学法 钙钛矿氧化物 催化剂 |
| 收稿时间： | 2005-09-27 |
| 修稿时间： | 2005-09-272005-12-06 |
Study of CH4 and CO oxidation from electrochemical method |
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| ZHU Junjiang YANG Xiangguang XU Xuelian WEI Kemei.Study of CH4 and CO oxidation from electrochemical method[J].Chinese Science Bulletin,2006,51(3):374-376. |
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| Authors: | Junjiang Zhu Xiangguang Yang Xuelian Xu Kemei Wei |
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| Institution: | (1) National Research Center of Chemical Fertilizer Catalysts, Fuzhou University, Fuzhou, 350002, China;(2) Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China;(3) College of Chemistry & Chemical Engineering, Fuzhou University, Fuzhou, 350002, China |
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| Abstract: | A MIDAS-400 customized data acquisition system has been used for the high-resolution sediment dynamic measurements over the Dafeng intertidal flats of northern Jiangsu during 6 tidal cycles from July 3 to July 10, 2003. The bed shear stress and bedload transport rates, in response to wave-current interactions, are calculated, which indicate that wind waves enhance the bottom shear stress and bedload transport rates. At the station for measurements, bedload transport was directed to seaward, with a sediment discharge of 30—150 kg∙m-1 per tidal cycle. The surficial sediment samples were collected from a grid with 10 m spatial intervals over a rectangle 2×104 m2 experimental area, near the MIDAS-400 during the spring tide of July 4, 2003, and the neap tide of July 9, 2003. In addition, leveling survey was undertaken to obtain the detailed topography of the sampling area. Grain-size trend analysis of the sediment samples shows that the bedload transport patterns are complex, mainly controlled by the hydrodynamics and local geomorphology (e.g. tidal creeks) over the intertidal flats. Furthermore, the grain-size trends pattern during the neap tide rather than during the spring tide is consistent with the cal-culated bedload transport, and the grain-size trend vectors for the spring tide are larger than those for the neap tide, indicating that the sampling thickness of surficial sediment during the neap tide may contain the information on the geomorphological evolution (or sediment deposition/erosion) from the spring to the neap tide. |
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| Keywords: | heterogeneous catalysis cyclic voltammetry CH4 CO perovskite-like oxides |
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