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1. J iang L in2cai, Pletcher D. The catalysis of the anodic oxidation of chromium ( III) to dichromate by silver ( I) in the aqueous sulphuric acid[ J ]. Journal of Electroa2 nalytical Chemistry, 1983, 152 (1～2) : 1572162. 2. Schultze J W, Vetter K J. The influence of the tunnel p robability on the anodic oxygen evolution and other redox reactions at oxide covered p latinum electrodes [ J ]. Electrochimica Acta, 1973, 18 (11) : 8892896. 我着急用全文，谢谢 |
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tfang
木虫之王 (文学泰斗)
木虫008之大懒虫
- 博学EPI: 11
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The influence of the tunnel probability on the anodic oxygen evolution and other redox reactions at oxide covered platinum electrodes*1 J. W. Schultze and K. J. Vetter Institut für Physikalische Chemie der Freien Universität Berlin, W. Germany Received 9 March 1973. Available online 1 February 2002. Abstract Potentiostatic and galvanostatic pulse measurements were carried out to investigate the anodic oxygen evolution at platinum electrodes in 1N H2SO4 in dependence on the oxide layer thickness d and the electrode potential . The thickness d (1·5–10 Å  was obtained from cathodic charging curves. Further, the temperature dependence (0°–81°C) was evaluated from Bowden's measurements. Summarizing, the current io2 follows the relation, log i = A - (E0a - αFη)/2·3 RT - d/do. The experimental activation energy Eo = Eoa = αFη decreases linearly with increasing overvoltage η. The linear decrease of log i with increasing d, which is given by the term d/do, is correlated to the probability of the quantum mechanical tunnel transition of the electron from adsorbed ions, OH−ad or O2−ad respectively, through the oxide layer to the metal. Similar effects of the oxide layer thickness on the current density were observed in the case of the oxygen evolution at iridium, the CO-oxidation on platinum, and the reduction of Cl− and Ce4+ at platinum. In these cases a rate determining electron transfer through the oxide layer is also assumed.只有摘要，全文我们学校没有购买啊，呵呵 |
3楼2009-02-25 12:30:39
tfang
木虫之王 (文学泰斗)
木虫008之大懒虫
- 博学EPI: 11
- 应助: 191 (高中生)
- 贵宾: 0.002
- 金币: 176571
- 散金: 8530
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- 帖子: 57652
- 在线: 2616.2小时
- 虫号: 529162
- 注册: 2008-03-20
- 性别: GG
- 专业: 绿色有机化学
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The catalysis of the anodic oxidation of chromium(III) to dichromate by silver(I) in aqueous sulphuric acid Abstract It is shown that silver(I) is a very efficient catalyst for the oxidation of chromium(III) to dichromate at a platinum anode in sulphuric acid media. Indeed, with a solution of chromic ion (0.2 mol dm−3) and silver ion (0.01 mol dm−3) in sulphuric acid (5 mol dm−3), the current efficiency for dichromate formation is 94% at 100% conversion and the current density is determined by the diffusion of chromium(III) to the electrode surface. The possibility of using this method of generation of dichromate coupled to the oxidation of organic compounds in methylene chloride by phase transfer catalysis is discussed. It is shown that the conversion of benzyl alcohol to benzaldehyde and anthracene to anthraquinone is possible in good yields although the anode reaction shows some sensitivity to organic contamination. |
4楼2009-02-25 12:33:57