Abstract
The effect of tellurium (Te) doping on the electrocatalytic activity of La1-xTexMnO3 toward the oxygen reduction reaction is investigated for the first time. La1-xTexMnO3 with x-values up 23% were synthesized from a single ionic liquid-based precursor, yielding nanoparticles with mean diameter in the range of 40–68 nm and rhombohedral unit cell. Electrochemical studies were performed on carbon-supported particles in alkaline environment. The composition dependence activity is discussed in terms of surface density of Mn sites and changes in the effective Mn oxidation state.
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Acknowledgments
The authors acknowledge Dr. Devendra Tiwari and Gael Gobaille-Shaw for the fruitful discussions. V. C. and D. J. F. are thankful to the UK Catalysis Hub (EPSRC grants EP/K014706/1 and EP/K014714/1) for resources and support. L. J. M. and D. J. F. are also grateful to the EPSRC Centre for Doctoral Training in Catalysis for the financial support. SEM/EDX and TEM studies were carried out in the Chemistry Imaging Facility at the University of Bristol with equipment partly funded by EPSRC (EP/K035746/1 and EP/M028216/1). Authors acknowledge access to the Bristol NanoESCA Facility under EPSRC Strategic Equipment Grant EP/M000605/1. D. J. F. also acknowledges the University Research Fellowship (2015–2016) provided by the Institute of Advanced Studies of the University of Bristol.
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Celorrio, V., Morris, L.J., Cattelan, M. et al. Tellurium-doped lanthanum manganite as catalysts for the oxygen reduction reaction. MRS Communications 7, 193–198 (2017). https://doi.org/10.1557/mrc.2017.22
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DOI: https://doi.org/10.1557/mrc.2017.22