In Situ L-Edge XAS Study of a Manganese Oxide Water Oxidation Catalyst

Xi L, Schwanke C, Xiao J, Abdi FF, Zaharieva I, Aziz-Lange K (2017)
JOURNAL OF PHYSICAL CHEMISTRY C 121(22): 12003-12009.

Download
No fulltext has been uploaded. References only!
Journal Article | Original Article | Published | English

No fulltext has been uploaded

Author
; ; ; ; ;
Abstract
A new emerging water oxidation catalyst (WOC) generated via electrodeposition from aqueous solutions containing methylphosphate (MeP1) and MU2+ has been studied by in situ X-ray absorption spectroscopy (XAS) in transmission mode and in situ extended X-ray absorption fine -structure(EXAFS) in fluorescence mode. XA spectra were obtained for freshly prepared and activated MnP1 films under different potentials and after different,potential durations. Via linear combination fitting the contribution of different Mn species was revealed from the L-edge spectra. The XAS results show that the freshly prepared film at OCP contains a dominant contribution of MnO2 (similar to 75%) and a contribution from a birnessite-like material(similar to 25%). No or only a neglectable percentage of MnO, Mn3O4, or Mn2O3-like Mn species was found in the freshly prepared sample. After 51 min of in situ activation at 1.2 V at pH 7.0, the birnessite contribution increased to 75% in the spectrum. We correlate these changes to the Material conversion into an efficient WOC: After activation, the film behavior is reversible in potentials above and below water oxidation regime. EXAFS results are found to be consistent with our L-edge spectra fitting results.
Publishing Year
ISSN
PUB-ID

Cite this

Xi L, Schwanke C, Xiao J, Abdi FF, Zaharieva I, Aziz-Lange K. In Situ L-Edge XAS Study of a Manganese Oxide Water Oxidation Catalyst. JOURNAL OF PHYSICAL CHEMISTRY C. 2017;121(22):12003-12009.
Xi, L., Schwanke, C., Xiao, J., Abdi, F. F., Zaharieva, I., & Aziz-Lange, K. (2017). In Situ L-Edge XAS Study of a Manganese Oxide Water Oxidation Catalyst. JOURNAL OF PHYSICAL CHEMISTRY C, 121(22), 12003-12009. doi:10.1021/acs.jpcc.7b02331
Xi, L., Schwanke, C., Xiao, J., Abdi, F. F., Zaharieva, I., and Aziz-Lange, K. (2017). In Situ L-Edge XAS Study of a Manganese Oxide Water Oxidation Catalyst. JOURNAL OF PHYSICAL CHEMISTRY C 121, 12003-12009.
Xi, L., et al., 2017. In Situ L-Edge XAS Study of a Manganese Oxide Water Oxidation Catalyst. JOURNAL OF PHYSICAL CHEMISTRY C, 121(22), p 12003-12009.
L. Xi, et al., “In Situ L-Edge XAS Study of a Manganese Oxide Water Oxidation Catalyst”, JOURNAL OF PHYSICAL CHEMISTRY C, vol. 121, 2017, pp. 12003-12009.
Xi, L., Schwanke, C., Xiao, J., Abdi, F.F., Zaharieva, I., Aziz-Lange, K.: In Situ L-Edge XAS Study of a Manganese Oxide Water Oxidation Catalyst. JOURNAL OF PHYSICAL CHEMISTRY C. 121, 12003-12009 (2017).
Xi, Lifei, Schwanke, Christoph, Xiao, Jie, Abdi, Fatwa F., Zaharieva, Ivelina, and Aziz-Lange, Kathrin. “In Situ L-Edge XAS Study of a Manganese Oxide Water Oxidation Catalyst”. JOURNAL OF PHYSICAL CHEMISTRY C 121.22 (2017): 12003-12009.
This data publication is cited in the following publications:
This publication cites the following data publications:

Export

0 Marked Publications

Open Data PUB

Web of Science

View record in Web of Science®

Search this title in

Google Scholar