| Full text | |
| Author(s): |
Ferreira, Luis M. C.
[1]
;
Grasseschi, Daniel
[1]
;
Santos, Mauro S. F.
[1]
;
Martins, Paulo R.
[2]
;
Gutz, Ivano G. R.
[1]
;
Ferreira, Ana Maria C.
[1]
;
Araki, Koiti
[1]
;
Toma, Henrique E.
[1]
;
Angnes, Lucio
[1]
Total Authors: 9
|
| Affiliation: | [1] Univ Sao Paulo, Inst Quim, BR-05508000 Sao Paulo, SP - Brazil
[2] Univ Fed Goias, Inst Quim, BR-74001970 Goiania, Go - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Langmuir; v. 31, n. 14, p. 4351-4360, APR 14 2015. |
| Web of Science Citations: | 10 |
| Abstract | |
The structure of polytetraruthenated nickel porphyrin was unveiled for the first time by electrochemistry, Raman spectroelectrochemistry, and a hydroxyl radical trapping assay. The electrocatalytic active material, precipitated on the electrode surface after successive cycling of {[}NiTPyP[Ru(bipy)(2)Cl](4)](4+) species in strong aqueous alkaline solution (pH 13), was found to be a peroxo-bridged coordination polymer. The electropolymerization process involves hydroxyl radicals (as confirmed by the characteristic set of DMPO/OH adduct EPR peaks) as reaction intermediates, electrocatalytically generated in the 0.80-1.10 V range, that induce the formation of NiO-O-Ni coordination polymers, as evidenced by Raman spectroelectrochemistry and molecular modeling studies. The film growth is halted above 1.10 V due to the formation of oxygen gas bubbles. (AU) | |
| FAPESP's process: | 11/00037-6 - Study and application of physical and chemical properties of plasmons nanoparticles in intelligent devices |
| Grantee: | Daniel Grasseschi |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |