Display options
Cite
Aaronson BD, Lai SC, Unwin PR. Spatially resolved electrochemistry in ionic liquids: surface structure effects on triiodide reduction at platinum electrodes. Langmuir. 2014;30(7):1915-9doi: 10.1021/la500271f.
Aaronson, B. D., Lai, S. C., & Unwin, P. R. (2014). Spatially resolved electrochemistry in ionic liquids: surface structure effects on triiodide reduction at platinum electrodes. Langmuir : the ACS journal of surfaces and colloids, 30(7), 1915-9. https://doi.org/10.1021/la500271f
Aaronson, Barak D B, et al. "Spatially resolved electrochemistry in ionic liquids: surface structure effects on triiodide reduction at platinum electrodes." Langmuir : the ACS journal of surfaces and colloids vol. 30,7 (2014): 1915-9. doi: https://doi.org/10.1021/la500271f
Aaronson BD, Lai SC, Unwin PR. Spatially resolved electrochemistry in ionic liquids: surface structure effects on triiodide reduction at platinum electrodes. Langmuir. 2014 Feb 25;30(7):1915-9. doi: 10.1021/la500271f. Epub 2014 Feb 12. PMID: 24479903.
Copy Download .nbib Format: NLM
Share it on

Langmuir. 2014 Feb 25;30(7):1915-9. doi: 10.1021/la500271f. Epub 2014 Feb 12.

Spatially resolved electrochemistry in ionic liquids: surface structure effects on triiodide reduction at platinum electrodes.

Langmuir : the ACS journal of surfaces and colloids

Barak D B Aaronson, Stanley C S Lai, Patrick R Unwin

Affiliations

  1. Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, United Kingdom.

PMID: 24479903 DOI: 10.1021/la500271f

Abstract

Understanding the relationship between electrochemical activity and electrode structure is vital for improving the efficiency of dye-sensitized solar cells. Here, the reduction of triiodide to iodide in 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm][BF4]) room temperature ionic liquid (RTIL) is investigated on polycrystalline platinum using scanning electrochemical cell microscopy (SECCM) and correlated to the crystallographic orientation from electron backscatter diffraction (EBSD). Although the rate determining step in all grains was the first electron transfer, significant grain-dependent variations in activity were revealed, with grains with a dominant (110) crystallographic character exhibiting higher catalytic activity compared to those with a major (100) orientation. The SECCM technique is demonstrated to resolve heterogeneity in activity, highlighting that methods incorporating polycrystalline electrodes miss vital details for understanding and optimizing electrocatalysts. An additional advantage of the SECCM over single-crystal techniques is its ability to probe high index facets.

Publication Types