Literature DB >> 27031580

Origin and Tunability of Unusually Large Surface Capacitance in Doped Cerium Oxide Studied by Ambient-Pressure X-Ray Photoelectron Spectroscopy.

Chirranjeevi Balaji Gopal1, Farid El Gabaly2, Anthony H McDaniel2, William C Chueh1,2,3.   

Abstract

The volumetric redox (chemical) capacitance of the surface of CeO2-δ films is quantified in situ to be 100-fold larger than the bulk values under catalytically relevant conditions. Sm addition slightly lowers the surface oxygen nonstoichiometry, but effects a 10-fold enhancement in surface chemical capacitance by mitigating defect interactions, highlighting the importance of differential nonstoichiometry for catalysis.
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Entities:  

Keywords:  catalysis; ceria; interfacial; nonstoichiometry; redox

Year:  2016        PMID： 27031580     DOI： 10.1002/adma.201506333

Source DB:  PubMed          Journal:  Adv Mater        ISSN： 0935-9648            Impact factor:   30.849


  2 in total

1.  Surface Chemistry of Perovskite-Type Electrodes During High Temperature CO2 Electrolysis Investigated by Operando Photoelectron Spectroscopy.

Authors:  Alexander K Opitz; Andreas Nenning; Christoph Rameshan; Markus Kubicek; Thomas Götsch; Raoul Blume; Michael Hävecker; Axel Knop-Gericke; Günther Rupprechter; Bernhard Klötzer; Jürgen Fleig
Journal:  ACS Appl Mater Interfaces       Date:  2017-10-05       Impact factor: 9.229

2.  Equilibrium oxygen storage capacity of ultrathin CeO2-δ depends non-monotonically on large biaxial strain.

Authors:  Chirranjeevi Balaji Gopal; Max García-Melchor; Sang Chul Lee; Yezhou Shi; Andrey Shavorskiy; Matteo Monti; Zixuan Guan; Robert Sinclair; Hendrik Bluhm; Aleksandra Vojvodic; William C Chueh
Journal:  Nat Commun       Date:  2017-05-18       Impact factor: 14.919
  2 in total

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