Zn-Doped RuO(2) electrocatalyts for Selective Oxygen Evolution: Relationship between Local Structure and Electrocatalytic Behavior in Chloride Containing Media

Kód výsledku v IS VaVaI

RIV/61388955:_____/11:00371759 - isvavai.cz

Nalezeny alternativní kódy

RIV/61388980:_____/11:00371759

Výsledek na webu

http://dx.doi.org/10.1021/cm1028782

DOI - Digital Object Identifier

10.1021/cm1028782

Jazyk výsledku

angličtina

Název v původním jazyce

Zn-Doped RuO(2) electrocatalyts for Selective Oxygen Evolution: Relationship between Local Structure and Electrocatalytic Behavior in Chloride Containing Media

Popis výsledku v původním jazyce

Nanocrystalline electrocatalytically active materials of chemical composition Ru(1-x)Zn(x)O(2) (0 < x < 0.3) were synthesized by freeze-drying technique. The diffraction patterns of the prepared samples corresponded to single-phase rutile type oxides. Local structure of the Ru(1-x)Zn(x)O(2) based on refinement of Ru K and Zn K edge EXAFS functions shows clustering of the Zn ions in the blocks with ilmenite structure intergrowing with Ru-rich rutile blocks. Ru(1-x)Zn(x)O(2) oxides are selective catalystsfor anodic oxygen evolution. The selectivity toward oxygen evolution in the presence of chlorides is affected by the actual Zn content and can be ascribed to structural hindrance of the formation of the surface peroxo group based active sites for chlorine evolution. The selectivity toward oxygen evolution in presence of chlorides is accompanied by the drop of the total activity, which gets more pronounced with increasing Zn content.

Název v anglickém jazyce

Zn-Doped RuO(2) electrocatalyts for Selective Oxygen Evolution: Relationship between Local Structure and Electrocatalytic Behavior in Chloride Containing Media

Popis výsledku anglicky

Nanocrystalline electrocatalytically active materials of chemical composition Ru(1-x)Zn(x)O(2) (0 < x < 0.3) were synthesized by freeze-drying technique. The diffraction patterns of the prepared samples corresponded to single-phase rutile type oxides. Local structure of the Ru(1-x)Zn(x)O(2) based on refinement of Ru K and Zn K edge EXAFS functions shows clustering of the Zn ions in the blocks with ilmenite structure intergrowing with Ru-rich rutile blocks. Ru(1-x)Zn(x)O(2) oxides are selective catalystsfor anodic oxygen evolution. The selectivity toward oxygen evolution in the presence of chlorides is affected by the actual Zn content and can be ascribed to structural hindrance of the formation of the surface peroxo group based active sites for chlorine evolution. The selectivity toward oxygen evolution in presence of chlorides is accompanied by the drop of the total activity, which gets more pronounced with increasing Zn content.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CG - Elektrochemie

OECD FORD obor

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Projekt

IAA400400906: Nanokrystalické oxidy pro selektivní anodickou elektrokatalýzu

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název periodika

Chemistry of Materials

ISSN

0897-4756

e-ISSN

—

Svazek periodika

23

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

200-207

Kód UT WoS článku

000286160800012

EID výsledku v databázi Scopus

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