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A Fast Soluble Carbon-Free Molecular Water Oxidation Catalyst Based on Abundant Metals.

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Title: A Fast Soluble Carbon-Free Molecular Water Oxidation Catalyst Based on Abundant Metals.
Authors: Yin, Qiushi, Tan, Miles, Besson, Claire, Geletii, Yueii V., Musaev, Djmaladdin G., Luznetsov, Aleksey E., Hardcastle, Ken I., Hill, Craig L.
Source: Science (pre-March 2025). 4/16/2010, Vol. 328 Issue 5976, p342-345. 4p.
Subjects: Catalysts, Renewable energy source research, Oxidation, Complex compounds, Cobalt compounds, Tungstates, Ligands (Chemistry), pH effect
Abstract: Traditional homogeneous water oxidation catalysts are plagued by instability under the reaction conditions. We report that the complex [Co4(H20)2(PW9O342]10-, comprising a Co404 core stabilized by oxidatively resistant polytungstate ligands, is a hydrolytically and oxidatively stable homogeneous water oxidation catalyst that self-assembles in water from salts of earth-abundant elements (Co, W, and P). With [Ru(bpy)3]3+ (bpy is 2,2'-bipyridine) as the oxidant, we observe catalytic turnover frequencies for O2 production ≥5 s-1 at pH = 8. The rate's pH sensitivity reflects the pH dependence of the four-electron O2-H2O couple. Extensive spectroscopic, electrochemical, and inhibition studies firmly indicate that [C04(H20)2(PW9034)2]10- is stable under catalytic turnover conditions: Neither hydrated cobalt ions nor cobalt hydroxide/oxide particles form in situ. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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PubType: Academic Journal
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  Data: A Fast Soluble Carbon-Free Molecular Water Oxidation Catalyst Based on Abundant Metals.
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  Data: <searchLink fieldCode="AR" term="%22Yin%2C+Qiushi%22">Yin, Qiushi</searchLink><br /><searchLink fieldCode="AR" term="%22Tan%2C+Miles%22">Tan, Miles</searchLink><br /><searchLink fieldCode="AR" term="%22Besson%2C+Claire%22">Besson, Claire</searchLink><br /><searchLink fieldCode="AR" term="%22Geletii%2C+Yueii+V%2E%22">Geletii, Yueii V.</searchLink><br /><searchLink fieldCode="AR" term="%22Musaev%2C+Djmaladdin+G%2E%22">Musaev, Djmaladdin G.</searchLink><br /><searchLink fieldCode="AR" term="%22Luznetsov%2C+Aleksey+E%2E%22">Luznetsov, Aleksey E.</searchLink><br /><searchLink fieldCode="AR" term="%22Hardcastle%2C+Ken+I%2E%22">Hardcastle, Ken I.</searchLink><br /><searchLink fieldCode="AR" term="%22Hill%2C+Craig+L%2E%22">Hill, Craig L.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 4/16/2010, Vol. 328 Issue 5976, p342-345. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Catalysts%22">Catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Renewable+energy+source+research%22">Renewable energy source research</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation%22">Oxidation</searchLink><br /><searchLink fieldCode="DE" term="%22Complex+compounds%22">Complex compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Cobalt+compounds%22">Cobalt compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Tungstates%22">Tungstates</searchLink><br /><searchLink fieldCode="DE" term="%22Ligands+%28Chemistry%29%22">Ligands (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22pH+effect%22">pH effect</searchLink>
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  Data: Traditional homogeneous water oxidation catalysts are plagued by instability under the reaction conditions. We report that the complex [Co4(H20)2(PW9O342]10-, comprising a Co404 core stabilized by oxidatively resistant polytungstate ligands, is a hydrolytically and oxidatively stable homogeneous water oxidation catalyst that self-assembles in water from salts of earth-abundant elements (Co, W, and P). With [Ru(bpy)3]3+ (bpy is 2,2'-bipyridine) as the oxidant, we observe catalytic turnover frequencies for O2 production ≥5 s-1 at pH = 8. The rate's pH sensitivity reflects the pH dependence of the four-electron O2-H2O couple. Extensive spectroscopic, electrochemical, and inhibition studies firmly indicate that [C04(H20)2(PW9034)2]10- is stable under catalytic turnover conditions: Neither hydrated cobalt ions nor cobalt hydroxide/oxide particles form in situ. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Oxidation
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              Text: 4/16/2010
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              Y: 2010
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