Local Structure of Pulse Plated Ni Rich Ni-Zn Alloys and Its Effect on the Electrocatalytic Activity in the Hydrogen Evolution Reaction

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F12%3A00394307" target="_blank" >RIV/61388955:_____/12:00394307 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1149/2.047209jes" target="_blank" >http://dx.doi.org/10.1149/2.047209jes</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1149/2.047209jes" target="_blank" >10.1149/2.047209jes</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Local Structure of Pulse Plated Ni Rich Ni-Zn Alloys and Its Effect on the Electrocatalytic Activity in the Hydrogen Evolution Reaction

Popis výsledku v původním jazyce

Ni rich NiZn alloys were prepared on Pt substrates by galvanostatic pulse plating from baths of variable Ni:Zn ratio. The pulse plated NiZn alloys are crystallographically amorphous and their overall chemical composition shows relatively weak dependenceon the pulse plating conditions. The local structure of the NiZn alloys determined from EXAFS spectra conforms to a model assuming coexistence of cubic and hexagonal-like arrangements. In the case of alloys plated from baths of low Zn content the cubic environment is zinc free and in the case of alloys plated from bath of high Zn content the Zn enters both cubic and hexagonal arrangement. The fraction of each of the coexisting local structures reflects the pulse plating conditions. The Ni rich NiZn alloys are active in the hydrogen evolution reaction showing electrocatalytic activity superior to that of bulk nickel. The electrocatalytic activity of the alloy samples in hydrogen evolution increases with increasing fraction of hexagonal l

Název v anglickém jazyce

Local Structure of Pulse Plated Ni Rich Ni-Zn Alloys and Its Effect on the Electrocatalytic Activity in the Hydrogen Evolution Reaction

Popis výsledku anglicky

Ni rich NiZn alloys were prepared on Pt substrates by galvanostatic pulse plating from baths of variable Ni:Zn ratio. The pulse plated NiZn alloys are crystallographically amorphous and their overall chemical composition shows relatively weak dependenceon the pulse plating conditions. The local structure of the NiZn alloys determined from EXAFS spectra conforms to a model assuming coexistence of cubic and hexagonal-like arrangements. In the case of alloys plated from baths of low Zn content the cubic environment is zinc free and in the case of alloys plated from bath of high Zn content the Zn enters both cubic and hexagonal arrangement. The fraction of each of the coexisting local structures reflects the pulse plating conditions. The Ni rich NiZn alloys are active in the hydrogen evolution reaction showing electrocatalytic activity superior to that of bulk nickel. The electrocatalytic activity of the alloy samples in hydrogen evolution increases with increasing fraction of hexagonal l

Druh

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

CEP obor

CG - Elektrochemie

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Journal of the Electrochemical Society

ISSN

0013-4651

e-ISSN

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Svazek periodika

159

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

"D555"-"D562"

Kód UT WoS článku

000309104400043

EID výsledku v databázi Scopus

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