Ru rich Ru-Mn-O phases for selective suppression of chlorine evolution in sea water electrolysis
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Ru rich Ru-Mn-O phases for selective suppression of chlorine evolution in sea water electrolysis. / Astudillo, Catalina; Macounová, Kateřina Minhová; Frandsen, Adrian Malthe; Nebel, Roman; Rossmeisl, Jan; Krtil, Petr.
I: Electrochimica Acta, Bind 470, 143295, 2023.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Ru rich Ru-Mn-O phases for selective suppression of chlorine evolution in sea water electrolysis
AU - Astudillo, Catalina
AU - Macounová, Kateřina Minhová
AU - Frandsen, Adrian Malthe
AU - Nebel, Roman
AU - Rossmeisl, Jan
AU - Krtil, Petr
N1 - Funding Information: This work was supported by the Grant Agency of the Czech Republic under contract 21–03037S. The authors also acknowledge the assistance received through the research infrastructure NanoEnviCZ supported by the Ministry of Education, Youth and Sports of the Czech Republic under contract LM2018124. AMF and JR acknowledge support from the Danish National Research foundation DNRF149 and research grant 9455 from VILLUM FONDEN. Publisher Copyright: © 2023 Elsevier Ltd
PY - 2023
Y1 - 2023
N2 - Limits of steering selectively gas evolving reaction on Ru rich oxide phases in Ru-Mn-O system were investigated by combined theoretical and experimental approach. Ru1-xMnxO2 materials of single phase nature conforming to the rutile structure were prepared by the spray freeze - freeze drying approach and tested for activity in oxygen and chlorine evolution reactions. The overall electrocatalytic activity of the prepared materials increases with increasing Mn content. In this manner also increases the selectivity towards oxygen evolution in acidic chloride containing solutions. Closer analysis shows that the amount of evolved oxygen (for a given electrode material) is practically independent of the chloride concentration. This is illustrated by the order of the oxygen evolution reaction with respect to chloride concentration being close to 0 in the whole range of the prepared Ru-Mn-O phases. The high selectivity towards oxygen evolution reaction coincides with low tendency of Ru-Mn-O phases to evolve oxygen via lattice oxygen activation (LOER). The experimental behavior is further confirmed by DFT analysis of the reactivity of the Ru-Mn-O surfaces.
AB - Limits of steering selectively gas evolving reaction on Ru rich oxide phases in Ru-Mn-O system were investigated by combined theoretical and experimental approach. Ru1-xMnxO2 materials of single phase nature conforming to the rutile structure were prepared by the spray freeze - freeze drying approach and tested for activity in oxygen and chlorine evolution reactions. The overall electrocatalytic activity of the prepared materials increases with increasing Mn content. In this manner also increases the selectivity towards oxygen evolution in acidic chloride containing solutions. Closer analysis shows that the amount of evolved oxygen (for a given electrode material) is practically independent of the chloride concentration. This is illustrated by the order of the oxygen evolution reaction with respect to chloride concentration being close to 0 in the whole range of the prepared Ru-Mn-O phases. The high selectivity towards oxygen evolution reaction coincides with low tendency of Ru-Mn-O phases to evolve oxygen via lattice oxygen activation (LOER). The experimental behavior is further confirmed by DFT analysis of the reactivity of the Ru-Mn-O surfaces.
KW - Chlorine evolution reaction
KW - Electrolysis
KW - Oxide anode
KW - Oxygen evolution reaction
KW - Selectivity
U2 - 10.1016/j.electacta.2023.143295
DO - 10.1016/j.electacta.2023.143295
M3 - Journal article
AN - SCOPUS:85174000405
VL - 470
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
M1 - 143295
ER -
ID: 371557167