Absence of Ni on the outer surface of Sr doped La2NiO4 single crystals

Mónica Burriel; Stuart Wilkins; John P. Hill; Miguel A. Muñoz-Márquez; Hidde H. Brongersma; John A. Kilner; Mary P. Ryan; Stephen J. Skinner

doi:10.1039/C3EE41622D

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Absence of Ni on the outer surface of Sr doped La₂NiO₄ single crystals†

Mónica Burriel,*^a Stuart Wilkins,^b John P. Hill,^b Miguel A. Muñoz-Márquez,^c Hidde H. Brongersma,^ad John A. Kilner,^ac Mary P. Ryan^a and Stephen J. Skinner*^a

Author affiliations

* Corresponding authors

^a Department of Materials, Imperial College London, Exhibition Road, London SW7 2AZ, UK
E-mail: m.burriel@imperial.ac.uk, s.skinner@imperial.ac.uk
Fax: +44 (0)20 7594 6757
Tel: +44 (0)20 7594 6782

^b Brookhaven National Laboratory, Upton, NY 11973, USA

^c CIC energiGUNE, Albert Einstein 48, 01510 – Miñano, Álava, Spain

^d Eindhoven University of Technology, Eindhoven, The Netherlands

Abstract

A combination of surface sensitive techniques was used to determine the surface structure and chemistry of La_2−xSr_xNiO_4+δ. These measurements unequivocally showed that Ni is not present in the outermost atomic layer, suggesting that the accepted model with the B-site cations exposed to the environment is incorrect.

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Article information

DOI: https://doi.org/10.1039/C3EE41622D
Article type: Communication
Submitted: 10 May 2013
Accepted: 04 Nov 2013
First published: 07 Nov 2013

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Energy Environ. Sci., 2014,7, 311-316

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Absence of Ni on the outer surface of Sr doped La₂NiO₄ single crystals

M. Burriel, S. Wilkins, J. P. Hill, M. A. Muñoz-Márquez, H. H. Brongersma, J. A. Kilner, M. P. Ryan and S. J. Skinner, Energy Environ. Sci., 2014, 7, 311 DOI: 10.1039/C3EE41622D

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