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7zzz

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[交流] 【求助】Catalytic Water Oxidation是什么意思? 已有3人参与

催化水氧化??

说的是什么啊
文章的结论一点都没看懂,有么有行家指点一下。先谢过

This study provides evidence that catalytic water oxidation driven by CAN provides access to reaction pathways that diverge from the prevailing “acid base” mechanism for single-site catalysts. The preference for each of these pathways is
dependent on reaction conditions and electron density at the metal site. The position of the RDS is shown to be sensitive to electron density at the Ru center and shows that higher catalytic activity is attained when the [RuV OO]2 is made accessible(i.e., RDS is kO2′ rather than kO2). However, too much density at the metal site can compromise the critical bond formation step, thus highlighting the inherent limitation for achieving high catalytic rates with catalysts of this type. This study also demonstrates that a minor auxiliary reaction pathway may be operative that enables the incorporation of an O-atom from a source other than water (e.g., CAN) into the dioxygen product. These findings provide important insight into the design and study of homogeneous water oxidation catalysts.
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mland

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zhangwengui330(金币+1):谢谢应助! 2010-11-02 10:08:24
不完全是需要光照的,[Co(NH3)6]3+就可以氧化水

不过现在大多是做光催化的了,用Ru-bipy体系的很多
4楼2010-11-02 09:51:40
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freelover

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难道不是么?这篇文章的反应不就是
4Ce(IV) + 2H2O -----> 4 Ce(III) + 4H+ +O2么?
2楼2010-11-01 22:53:26
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7zzz

铜虫 (小有名气)

谢谢楼上的,看懂了

不过有没有达人知道,将 水氧化分解出氧气 发生这种反应是需要光照的 催化剂其实是光催化剂?

不然分解水的能量从哪里来呢
3楼2010-11-02 08:29:10
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7zzz

铜虫 (小有名气)

引用回帖:
Originally posted by mland at 2010-11-02 09:51:40:
不完全是需要光照的,[Co(NH3)6]3+就可以氧化水

不过现在大多是做光催化的了,用Ru-bipy体系的很多

对这个不是很了解 谢谢你的回答,麻烦再问下
你说的 Ru-bipy体系 是需要光照的吧?
如果不需要光照,是不是就不是催化剂,是牺牲剂?
5楼2010-11-02 10:10:17
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