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[求助]
求大神翻译一下这段摘要，谢谢
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| ABSTRACT: The polyanion of formula {Co9(H2O)6(OH)3(HPO4)2(PW9O34)3}16− (Co9) contains a central nonacobalt core held together by hydroxo and hydrogen phosphate bridges and supported by three lacunary Keggin-type polyphosphotungstate ligands. Our data demonstrate that Co9 is a homogeneous catalyst for water oxidation.Catalytic water electrolysis on fluorine-doped tin oxide coated glass electrodes occurs at reasonable low overpotentials and rates when Co9 is present in a sodium phosphate buffer solution at neutral pH. We carried out our experiments with an excess of 2,2′-bipyridyl as the chelating agent for free aqueous CoII ions, in order to avoid the formation of a cobalt oxide film on the electrode, as observed for other polyoxometalate catalysts. In these conditions, no heterogeneous catalyst forms on the anode, and it does not show any deposited material or significant catalytic activity after a catalytic cycle. Co9 is also an extremely robust catalyst for chemical water oxidation. It is able to continuously catalyze oxygen evolution during days from a buffered sodium hypochlorite solution, maintaining constant rates and efficiencies without any significant apparition of fatigue. |
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jnxybsf
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hq214567849: 金币+30, 翻译EPI+1, ★★★很有帮助, 谢谢，已经很好了 2015-12-08 17:03:15
hq214567849: 金币+30, 翻译EPI+1, ★★★很有帮助, 谢谢，已经很好了 2015-12-08 17:03:15
| {Co9(H2O)6(OH)3(HPO4)2(PW9O34)3}16− (Co9)含有一个中心纳米钴核，该核由羟基和磷酸氢共同桥联，并被三个有孔Keggin型磷钨杂多酸配体承载。我们的数据表明Co9是一种水氧化的均相催化剂。当Co9处于中性PH值的磷酸钠缓冲溶液中时，水的催化电解会在渡有添加氟的氧化锡涂层的的玻璃电极上以适当低的过电位和速率发生。为了避免像其他的多金属氧酸盐催化剂那样电极上形成氧化钴膜，我们实验中用过量的2,2联吡啶做为螯合剂以保证水相中自由的二价钴离子。在该条件下，阳极上没有 形成非均相催化剂，并且在经过一个催化循环后，没有出现任何沉积物和明显的催化活性。Co9也是一种非常活跃的水氧化催化剂，它能够以恒定的速率和效率持续地从次磷酸铵钠缓冲溶液中催化析氧，且不会出现明显的衰减迹象。 外行，有些专业术语不准 |
2楼2015-12-08 01:13:13
