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Concerted proton-co...
Concerted proton-coupled electron transfer from a metal-hydride complex
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Bourrez, Marc (författare)
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Steinmetz, Romain (författare)
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- Ott, Sascha (författare)
- Uppsala universitet,Molekylär biomimetik
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Gloaguen, Frederic (författare)
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- Hammarström, Leif (författare)
- Uppsala universitet,Fysikalisk kemi
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(creator_code:org_t)
- 2015
- 2015
- Engelska.
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Ingår i: Nature Chemistry. - 1755-4330 .- 1755-4349. ; 7:2, s. 140-145
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Metal hydrides are key intermediates in the catalytic reduction of protons and CO2 as well as in the oxidation of H-2. In these reactions, electrons and protons are transferred to or from separate acceptors or donors in bidirectional proton-coupled electron transfer (PCET) steps. The mechanistic interpretation of PCET reactions of metal hydrides has focused on the stepwise transfer of electrons and protons. A concerted transfer may, however, occur with a lower reaction barrier and therefore proceed at higher catalytic rates. Here we investigate the feasibility of such a reaction by studying the oxidation-deprotonation reactions of a tungsten hydride complex. The rate dependence on the driving force for both electron transfer and proton transfer-employing different combinations of oxidants and bases-was used to establish experimentally the concerted, bidirectional PCET of a metal-hydride species. Consideration of the findings presented here in future catalyst designs may lead to more-efficient catalysts.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Publikations- och innehållstyp
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- art (ämneskategori)
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