In this paper we show that in an electrochemical cell in which the photoanode is coated with chiral molecules, the over-potential required for hydrogen production drops remarkably, as compared with cells containing achiral molecules. The hydrogen evolution efficiency is studied comparing seven different organic molecules, three chiral and four achiral. We propose that the spin specificity of electrons transferred through chiral molecules is the origin of a more efficient oxidation process in which oxygen is formed in its triplet ground state. The new observations are consistent with recent theoretical works pointing to the importance of spin alignment in the water-splitting process.

The Role of the Electron Spin Polarization in Water Splitting / Mtangi, Wilbert; Kiran, Vankayala; Fontanesi, Claudio; Naaman, Ron. - In: THE JOURNAL OF PHYSICAL CHEMISTRY LETTERS. - ISSN 1948-7185. - STAMPA. - 6:24(2015), pp. 4916-4922. [10.1021/acs.jpclett.5b02419]

The Role of the Electron Spin Polarization in Water Splitting

FONTANESI, Claudio;
2015

Abstract

In this paper we show that in an electrochemical cell in which the photoanode is coated with chiral molecules, the over-potential required for hydrogen production drops remarkably, as compared with cells containing achiral molecules. The hydrogen evolution efficiency is studied comparing seven different organic molecules, three chiral and four achiral. We propose that the spin specificity of electrons transferred through chiral molecules is the origin of a more efficient oxidation process in which oxygen is formed in its triplet ground state. The new observations are consistent with recent theoretical works pointing to the importance of spin alignment in the water-splitting process.
2015
1-dic-2015
6
24
4916
4922
The Role of the Electron Spin Polarization in Water Splitting / Mtangi, Wilbert; Kiran, Vankayala; Fontanesi, Claudio; Naaman, Ron. - In: THE JOURNAL OF PHYSICAL CHEMISTRY LETTERS. - ISSN 1948-7185. - STAMPA. - 6:24(2015), pp. 4916-4922. [10.1021/acs.jpclett.5b02419]
Mtangi, Wilbert; Kiran, Vankayala; Fontanesi, Claudio; Naaman, Ron
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1078972
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