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小木虫论坛-学术科研互动平台 » 化学化工区 » 催化 » 催化反应 » 讨论一下“机械催化”产氢吧
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shijinwen

金虫 (小有名气)

[交流] 讨论一下“机械催化”产氢吧

Domen Kazunari于1998年在CC上以“Mechano-catalytic overall water splitting”为题目，提出了全新的“机械催化产氢”的概念。之后，发表了一系列相关文章。
[98]Mechano-catalytic overall water splitting[Chem. Commun.]
[99]Mechano-catalysis—a novel method for overall water splitting[PCCP]
[00]A study of mechano-catalysts for overall water[JPCB]
[00]Mechano-catalytic overall water splitting (II) nafion-deposited Cu2O[Applied Catalysis A：General]
[00]Mechano-catalytic overall water splitting on some mixed oxides[Catalysis Today]
[00]Mechano-catalytic overall water splitting on some oxides (II)[Applied Catalysis A：General]
[00]Mechano-catalytic overall water-splitting into hydrogen and oxygen on some metal oxides[Applied Energy]

很多同行也对其提出了质疑。
[04]Comment on “A Study of Mechano-Catalysis for
Overall Water Splitting”[JPCB]

请问各位对“机械催化产氢”或“机械催化”是怎么认识的？

[ Last edited by nxl5096224 on 2007-6-5 at 23:35 ]
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daiqiguang

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berlin(金币+5):那能见笑，鼓励还来不及呢...
再提供三篇文献：
1. Reply to "Comment on 'A Study of Mechano-Catalysts for Overall Water Splitting'"
Hara, M.; Domen, K.
J. Phys. Chem. B.; (Comment); 2004; 108(49); 19078-19078.  DOI:
2. A Study of Mechano-Catalysts for Overall Water Splitting
Hara, M.; Komoda, M.; Hasei, H.; Yashima, M.; Ikeda, S.; Takata, T.; Kondo, J. N.; Domen, K.
J. Phys. Chem. B.; (Article); 2000; 104(4); 780-785.  DOI: 10.1021/jp993441h

3. Comment on "A Study of Mechano-Catalysis for Overall Water Splitting"
Ross, D. S.
J. Phys. Chem. B.; (Comment); 2004; 108(49); 19076-19077.  DOI:

从昨天开始知道机械催化这个概念后，就开始看文献，初步形成了自己的概念：文章大概讲的是：Cu2O, NiO, Co3O4,CuAlO2，and Fe3O4等少数材料（催化剂）在搅拌的情况下能将水直接分解为H2和O2！！
Hara等人在最初的光催化水制H2 研究中发现：当撤掉光源时水继续分解，但当停止搅拌时则不能产生H2、O2。另外，产生H2的速度与搅拌子有关，也就是搅拌的越快产H2速度越快！由此，他们提出了机械催化概念——机械能通过催化剂直接转变为化学能！实验还发现如果产生的H2、O2不及时移走，反应会逐渐停止！！
Hara等人在J. Phys. Chem. B.上文章出来后，Ross给与了反驳，说：Hara等人的机械催化分解水制氢其实就是热分解水产生氢，因为搅拌过程中摩擦力可以产生高达1500度的高温，在如此高的温度下并存在适当催化剂条件下，水当然可以分解！随后，Hara也给与反驳并从能量上的理论计算以及各种比较一再证明他的机械催化没问题，而且他还透漏目前他们正在通过microplasma（微等离子体）概念来解释这个显现——our attention has turned to microplasma to explain this phenomenon. Microplasma is the emission of electrons, ions, and photons due to tribocharging and is observed at sliding contacts of insulators and semiconductors in various gases and liquids, even at low sliding velocities.9 Such triboplasma would lead to various chemical decompositions, such as the  confirmed decomposition of n-butane.10 Tribocharging is expected to be highly dependent on the material used, suggesting that  microplasma may be a promising candidate as the mechanism of our mechanical water splitting. More detailed study is therefore necessary to determine how tribocharging of these active oxides differs from that of nonactive oxides.


说实话我对这个所谓的“机械催化”也不太认可，尤其是日本人（哈哈）！！感觉就是普通的催化，只不过他所采用的几种催化剂正好具备催化分解水的性能！！我的想法有点类似Ross，机械搅拌只不过是提供能量的一种方式而已，如果他们做在加热或微波条件下是否同样可以分解水，我想结果更能令人信服！！另外，搅拌还有一种加快传输的作用（不搅拌停止反应），反应的控制步骤也许在传质方面！！



自己的一点小看法，大家见笑了！！

[ Last edited by daiqiguang on 2006-12-6 at 10:17 ]
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12楼2006-12-06 10:16:00
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daiqiguang

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机械催化???没听说过，看样子真是孤陋寡闻啊！！学习学习！！
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可可西里

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引用回帖:
Originally posted by daiqiguang at 2006-12-5 06:16 PM:
机械催化???没听说过，看样子真是孤陋寡闻啊！！学习学习！！

我是光催的

听过这个

感觉有点奇怪
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求助文献下载后，及时评分和EPI。
3楼2006-12-05 18:55:11
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daiqiguang

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引用回帖:
Originally posted by shijinwen at 2006-12-5 05:08 PM:
Domen Kazunari于1998年在CC上以“Mechano-catalytic overall water splitting”为题目，提出了全新的“机械催化产氢”的概念。之后，发表了一系列相关文章。
[98]Mechano-catalytic overall water splitting[Ch ...

文章还挺多的
A note on the gas-evolution of mechano-catalytic water-splitting system  • SHORT COMMUNICATION
International Journal of Hydrogen Energy, Volume 26, Issue 4, April 2001, Page 401 T. Ohta

        Mechano-catalytic overall water splitting on some mixed oxides  • ARTICLE
Catalysis Today, Volume 63, Issues 2-4, 25 December 2000, Pages 175-181
Go Hitoki, Tsuyosi Takata, Shigeru Ikeda, Michikazu Hara, Junko N. Kondo, Masato Kakihana and Kazunari Domen

        Efficiency of mechano-catalytic water-splitting system  • ARTICLE
International Journal of Hydrogen Energy, Volume 25, Issue 12, December 2000, Pages 1151-1156
T. Ohta

        On the theory of mechano-catalytic water-splitting system  • ARTICLE
International Journal of Hydrogen Energy, Volume 25, Issue 10, 1 October 2000, Pages 911-917
Tokio Ohta

        Energy systems and adaptive complexity  • ARTICLE
Applied Energy, Volume 67, Issues 1-2, September 2000, Pages 3-16
Tokio Ohta

        Mechano-catalytic overall water-splitting into hydrogen and oxygen on some metal oxides  • ARTICLE
Applied Energy, Volume 67, Issues 1-2, September 2000, Pages 159-179
Kazunari Domen, Shigeru Ikeda, Tsuyoshi Takata, Akira Tanaka, Michikazu Hara and Junko N. Kondo

        Mechano-catalytic water-splitting  • ARTICLE
Applied Energy, Volume 67, Issues 1-2, September 2000, Pages 181-193
Tokio Ohta

        Mechano-catalytic overall water splitting on some oxides (II)  • ARTICLE
Applied Catalysis A: General, Volume 200, Issues 1-2, 28 August 2000, Pages 255-262
Tsuyosi Takata, Shigeru Ikeda, Akira Tanaka, Michikazu Hara, Junko N. Kondo and Kazunari Domen

        Preliminary theory of mechano-catalytic water-splitting  • ARTICLE
International Journal of Hydrogen Energy, Volume 25, Issue 4, 1 April 2000, Pages 287-293
T. Ohta

        Mechano-catalytic overall water splitting (II) nafion-deposited Cu2O  • ARTICLE
Applied Catalysis A: General, Volume 190, Issues 1-2, 3 January 2000, Pages 35-42
Michikazu Hara, Hironori Hasei, Masaaki Yashima, Sigeru Ikeda, Tsuyoshi Takata, Junko N. Kondo and Kazunari Domen

发两篇大家共同研究
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