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  4. Introducing Water-Network-Assisted Proton Transfer for Boosted Electrocatalytic Hydrogen Evolution with Cobalt Corrole
 
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2021
  • Zeitschriftenaufsatz

Titel

Introducing Water-Network-Assisted Proton Transfer for Boosted Electrocatalytic Hydrogen Evolution with Cobalt Corrole

Abstract
Proton transfer is vital for many biological and chemical reactions. Hydrogen-bonded water-containing networks are often found in enzymes to assist proton transfer, but similar strategy has been rarely presented by synthetic catalysts. We herein report the Co corrole 1 with an appended crown ether unit and its boosted activity for the hydrogen evolution reaction (HER). Crystallographic and 1H NMR studies proved that the crown ether of 1 can grab water via hydrogen bonds. By using protic acids as proton sources, the HER activity of 1 was largely boosted with added water, while the activity of crown-ether-free analogues showed very small enhancement. Inhibition studies by adding 1) external 18-crown-6-ether to extract water molecules and 2) potassium ion or N-benzyl-n-butylamine to block the crown ether of 1 further confirmed its critical role in assisting proton transfer via grabbed water molecules. This work presents a synthetic example to boost HER through water-containing networks.
Author(s)
Li, X.
Lv, B.
Zhang, X.-P.
Jin, X.
Guo, K.
Zhou, D.
Bian, H.
Zhang, W.
Apfel, Ulf-Peter
Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT
Cao, R.
Zeitschrift
Angewandte Chemie. International edition
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DOI
10.1002/anie.202114310
Language
Englisch
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UMSICHT Oh
Tags
  • biology

  • cobalt

  • complexation

  • crown ethers

  • electrocatalysis

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