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Potential-dependent water orientation on Pt(111), Pt(100), and Pt(110), as inferred from laser-pulsed experiments. Electrostatic and chemical effects

Potential-dependent water orientation on Pt(111), Pt(100), and Pt(110), as inferred from laser-pulsed experiments. Electrostatic and chemical effects
Potential-dependent water orientation on Pt(111), Pt(100), and Pt(110), as inferred from laser-pulsed experiments. Electrostatic and chemical effects
The laser-induced temperature jump method is used to characterize the net orientation of interfacial water on well-defined platinum surfaces, Pt(111), Pt(100), and Pt(110), as a function of the applied potential. A clear effect of the surface structure on the potential of water reorientation is observed, being 0.37 for Pt(111), 0.33 for Pt(100), and 0.14 V vs RHE for Pt(110) in 0.1 M HClO4 solution. The potential of water reorientation also exhibits a different pH dependency for the three basal planes, shifting 0.060 for Pt(111), 0.030 for Pt(100), and 0.015 V/dec for Pt(110). Comparison with charge density data provides a deeper understanding of these results. A quantitative analysis of the electrostatic and chemical effects governing the potential-dependent reorientation of the interfacial water network is addressed. It is concluded that water on Pt(111) exhibits a small net orientation in the absence of electric field at the interphase. On the other hand, the agreement between the relative position of values of the potential of water reorientation and work functions, for the three basal planes, suggests that the same situation holds for Pt(100) and Pt(110).
1932-7447
9290-9304
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Climent, Victor
c3ecab58-edb5-4055-8fa0-c0aef0fc60a4
Feliu, Juan
14aa5d27-621c-4999-870d-4856abaf5996
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Climent, Victor
c3ecab58-edb5-4055-8fa0-c0aef0fc60a4
Feliu, Juan
14aa5d27-621c-4999-870d-4856abaf5996

Garcia-Araez, Nuria, Climent, Victor and Feliu, Juan (2009) Potential-dependent water orientation on Pt(111), Pt(100), and Pt(110), as inferred from laser-pulsed experiments. Electrostatic and chemical effects. The Journal of Physical Chemistry C, 113 (21), 9290-9304. (doi:10.1021/jp900792q).

Record type: Article

Abstract

The laser-induced temperature jump method is used to characterize the net orientation of interfacial water on well-defined platinum surfaces, Pt(111), Pt(100), and Pt(110), as a function of the applied potential. A clear effect of the surface structure on the potential of water reorientation is observed, being 0.37 for Pt(111), 0.33 for Pt(100), and 0.14 V vs RHE for Pt(110) in 0.1 M HClO4 solution. The potential of water reorientation also exhibits a different pH dependency for the three basal planes, shifting 0.060 for Pt(111), 0.030 for Pt(100), and 0.015 V/dec for Pt(110). Comparison with charge density data provides a deeper understanding of these results. A quantitative analysis of the electrostatic and chemical effects governing the potential-dependent reorientation of the interfacial water network is addressed. It is concluded that water on Pt(111) exhibits a small net orientation in the absence of electric field at the interphase. On the other hand, the agreement between the relative position of values of the potential of water reorientation and work functions, for the three basal planes, suggests that the same situation holds for Pt(100) and Pt(110).

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Published date: 1 May 2009
Organisations: Electrochemistry

Identifiers

Local EPrints ID: 345804
URI: http://eprints.soton.ac.uk/id/eprint/345804
ISSN: 1932-7447
PURE UUID: fe3136b5-3f95-4680-b3bf-22c07b579f8f
ORCID for Nuria Garcia-Araez: ORCID iD orcid.org/0000-0001-9095-2379

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Date deposited: 30 Nov 2012 14:49
Last modified: 15 Mar 2024 03:46

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Contributors

Author: Victor Climent
Author: Juan Feliu

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