This work demonstrates the chiral-induced spin selectivity effect for inorganic copper oxide films and exploits it to enhance the chemical selectivity in electrocatalytic water splitting. Chiral CuO films are electrodeposited on a polycrystalline Au substrate, and their spin filtering effect on electrons is demonstrated using Mott polarimetry analysis of photoelectrons. CuO is known to act as an electrocatalyst for the oxygen evolution reaction; however, it also generates side products such as H 2 O 2 . We show that chiral CuO is selective for O 2 ; H 2 O 2 generation is strongly suppressed on chiral CuO but is present with achiral CuO. The selectivity is rationalized in terms of the electron spin-filtering properties of the chiral CuO and the spin constraints for the generation of triplet oxygen. These findings represent an important step toward the development of all-inorganic chiral materials for electron spin filtering and the creation of efficient, spin-selective (photo)electrocatalysts for water splitting.

Controlling Chemical Selectivity in Electrocatalysis with Chiral CuO-Coated Electrodes / Ghosh, K. B.; Zhang, W.; Tassinari, F.; Mastai, Y.; Lidor-Shalev, O.; Naaman, R.; Mollers, P.; Nurenberg, D.; Zacharias, H.; Wei, J.; Wierzbinski, E.; Waldeck, D. H.. - In: JOURNAL OF PHYSICAL CHEMISTRY. C. - ISSN 1932-7447. - 123:5(2019), pp. 3024-3031. [10.1021/acs.jpcc.8b12027]

Controlling Chemical Selectivity in Electrocatalysis with Chiral CuO-Coated Electrodes

Tassinari F.;Naaman R.;
2019

Abstract

This work demonstrates the chiral-induced spin selectivity effect for inorganic copper oxide films and exploits it to enhance the chemical selectivity in electrocatalytic water splitting. Chiral CuO films are electrodeposited on a polycrystalline Au substrate, and their spin filtering effect on electrons is demonstrated using Mott polarimetry analysis of photoelectrons. CuO is known to act as an electrocatalyst for the oxygen evolution reaction; however, it also generates side products such as H 2 O 2 . We show that chiral CuO is selective for O 2 ; H 2 O 2 generation is strongly suppressed on chiral CuO but is present with achiral CuO. The selectivity is rationalized in terms of the electron spin-filtering properties of the chiral CuO and the spin constraints for the generation of triplet oxygen. These findings represent an important step toward the development of all-inorganic chiral materials for electron spin filtering and the creation of efficient, spin-selective (photo)electrocatalysts for water splitting.
2019
123
5
3024
3031
Controlling Chemical Selectivity in Electrocatalysis with Chiral CuO-Coated Electrodes / Ghosh, K. B.; Zhang, W.; Tassinari, F.; Mastai, Y.; Lidor-Shalev, O.; Naaman, R.; Mollers, P.; Nurenberg, D.; Zacharias, H.; Wei, J.; Wierzbinski, E.; Waldeck, D. H.. - In: JOURNAL OF PHYSICAL CHEMISTRY. C. - ISSN 1932-7447. - 123:5(2019), pp. 3024-3031. [10.1021/acs.jpcc.8b12027]
Ghosh, K. B.; Zhang, W.; Tassinari, F.; Mastai, Y.; Lidor-Shalev, O.; Naaman, R.; Mollers, P.; Nurenberg, D.; Zacharias, H.; Wei, J.; Wierzbinski, E.; Waldeck, D. H.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1260535
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