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英文翻译急……求大家帮帮忙啊！
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标题：Oxygen reduction mechanism on corroded zinc 摘要：The mechanism of oxygen reduction on the as-polished and corroded zinc specimens has been studied using a rotating ring disc electrode (RRDE) system. On the as-polished surface, oxygen was reduced into two distinct steps. In the first step, about 44% of O2 was reduced to H2O2 in a 2-electron reaction with the rest being reduced to OH in a 4-electron reaction. On the other hand, in the second step, with the increase of overpotential O2 was almost exclusively reduced to OH in a 4-electron reaction. The first step reduction occurred on an air-formed oxide-covered surface at more positive potential than 1.2 V vs. Ag/AgCl and the second step reduction (E < 1.2 V) took place on a semi-uniformly active surface. On the corroded surface, the second step was not distinctly observed on the polarization curve, because reduction of the zinc corrosion products simultaneously took place around 1.2 V. The O2 reduction in the first step was inhibited by deposition of the corrosion products, though the ratio of amount of O2 reduced to OH in a 4-electron reaction was larger than that on the as-polished surface. The mechanism of oxygen reduction is discussed on the basis of results obtained from the RRDE experiment. |
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lyrzoe
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sltmac(金币+2): 欢迎常来 2011-10-08 08:19:27
寂寞倾城(金币+15, 翻译EPI+1): 谢谢 2011-10-08 14:23:09
sltmac(金币+2): 欢迎常来 2011-10-08 08:19:27
寂寞倾城(金币+15, 翻译EPI+1): 谢谢 2011-10-08 14:23:09
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很多专业方面翻译的不好，但大体意思都翻译出来了，你可以看看，修改修改。 腐蚀锌的氧还原机理 摘要：磨光锌和腐蚀锌样品的氧还原机理一直用旋转圆盘电极(RRDE)体系来研究，在磨光锌的表面，氧分两步还原。第一步，大约44%的O2 2电子反应中被还原成H2O2，剩下的O2在4电子反应中被还原成OH。另一方面，在第二步，由于超电势的增加，O2几乎全部以4电子反应被还原成OH。第一步还原发生由于空气形成的氧化表面覆盖膜产生了比Ag/AgCl 1.2V还正的电势，第二步还原（E<1.2V）发生在半均一的活性表面。 在腐蚀锌的表面，第二步反应在极化曲线上不易被清晰观察，因为在1.2V附近锌的腐蚀产物同时产生。尽管以4电子反应还原成OH的O2数量比例大于磨光锌表面的反应，O2还原的第一步由于腐蚀产物的沉积仍受到抑制。根据旋转圆盘电极(RRDE)实验结果来讨论氧还原的机理。 |
3楼2011-10-08 00:26:52