Selectivity of Ru-rich Ru-Ti-O oxide surfaces in parallel oxygen and chlorine evolution reactions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F22%3A00559888" target="_blank" >RIV/61388955:_____/22:00559888 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0333016" target="_blank" >https://hdl.handle.net/11104/0333016</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2022.140878" target="_blank" >10.1016/j.electacta.2022.140878</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Selectivity of Ru-rich Ru-Ti-O oxide surfaces in parallel oxygen and chlorine evolution reactions

Popis výsledku v původním jazyce

The electrocatalytic behaviour of single-phase Ru1-xTixO2 materials was studied to outline general trends controlling the selectivity of oxide-based anodes in parallel oxygen evolution and chlorine evolution reactions. Materials with x ranging between 0 and 0.2 were prepared by spray freeze freeze drying approach. Prepared materials show a non-homogeneous distribution of Ti in the structure with dominant clustering of the Ti along the (001) direction. For materials with x higher than 0.1 the dominant linear clustering of Ti along the z-axis changes, including Ti clustering also along (111) direction. Prepared materials are active in both oxygen evolution and chlorine evolution reactions. The Ti has a pronounced effect on the selectivity of the prepared materials. Ti presence affects the selectivity of the prepared materials in a complex manner. Materials featuring a low Ti content (x∼0.05) retain a preference for oxygen evolution reaction even in presence of chlorides and are more selective for oxygen evolution than pure RuO2. The selectivity towards chlorine evolution increases with increasing Ti content and, apparently, also with clustering of Ti along the (111) direction. The selectivity towards chlorine evolution may be related to the tendency of the prepared catalysts to evolve the oxygen via lattice oxygen evolution reaction (LOER) reflecting the ability of the catalyst surface to form active sites under operando conditions.

Název v anglickém jazyce

Selectivity of Ru-rich Ru-Ti-O oxide surfaces in parallel oxygen and chlorine evolution reactions

Popis výsledku anglicky

The electrocatalytic behaviour of single-phase Ru1-xTixO2 materials was studied to outline general trends controlling the selectivity of oxide-based anodes in parallel oxygen evolution and chlorine evolution reactions. Materials with x ranging between 0 and 0.2 were prepared by spray freeze freeze drying approach. Prepared materials show a non-homogeneous distribution of Ti in the structure with dominant clustering of the Ti along the (001) direction. For materials with x higher than 0.1 the dominant linear clustering of Ti along the z-axis changes, including Ti clustering also along (111) direction. Prepared materials are active in both oxygen evolution and chlorine evolution reactions. The Ti has a pronounced effect on the selectivity of the prepared materials. Ti presence affects the selectivity of the prepared materials in a complex manner. Materials featuring a low Ti content (x∼0.05) retain a preference for oxygen evolution reaction even in presence of chlorides and are more selective for oxygen evolution than pure RuO2. The selectivity towards chlorine evolution increases with increasing Ti content and, apparently, also with clustering of Ti along the (111) direction. The selectivity towards chlorine evolution may be related to the tendency of the prepared catalysts to evolve the oxygen via lattice oxygen evolution reaction (LOER) reflecting the ability of the catalyst surface to form active sites under operando conditions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GA21-03037S" target="_blank" >GA21-03037S: Kontrola selektivity anodických reakcí v procesech vylučování chlóru a výroby chlorečnanu</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Electrochimica acta

ISSN

0013-4686

e-ISSN

1873-3859

Svazek periodika

427

Číslo periodika v rámci svazku

SEP 2022

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

140878

Kód UT WoS článku

000852802700004

EID výsledku v databázi Scopus

2-s2.0-85135861281