Catalytic effect of Mg2Ni and Mg12RE on MgH2 formation and decomposition

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F16%3A43902440" target="_blank" >RIV/60461373:22310/16:43902440 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.ijhydene.2016.03.087" target="_blank" >http://dx.doi.org/10.1016/j.ijhydene.2016.03.087</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijhydene.2016.03.087" target="_blank" >10.1016/j.ijhydene.2016.03.087</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Catalytic effect of Mg2Ni and Mg12RE on MgH2 formation and decomposition

Popis výsledku v původním jazyce

In this study, several binary and ternary as-cast Mg-Ni-RE alloys were subjected to an electrochemical hydriding process to determine the catalytic effect of intermetallic phases on MgH2 formation and decomposition. The alloys were electrochemically hydrided in a 6 mol/1KOH solution at 80 degrees C. To assess the catalytic effect of the Mg2Ni and Mg12RE phases on electrochemical hydriding performance, an optical emission spectrometer with glow discharge was employed. The temperature of dehydriding was observed by the temperature-programmed desorption technique. It was found that the only hydride formed after the electrochemical hydriding of all investigated alloys was MgH2. Both the Mg2Ni and Mg12RE phases support hydrogen absorption but in different manners. The Mg2Ni phase maximizes the hydrogen concentration beneath the surface of the binary alloys. In contrast, the Mg12RE phase decreases the maximum hydrogen surface concentration but supports inward hydrogen diffusion. The influence of the Mg12RE phase on hydrogen diffusion is most likely responsible for the reduction of the MgH2 decomposition temperature by more than 190 K compared to commercial MgH2.

Název v anglickém jazyce

Catalytic effect of Mg2Ni and Mg12RE on MgH2 formation and decomposition

Popis výsledku anglicky

In this study, several binary and ternary as-cast Mg-Ni-RE alloys were subjected to an electrochemical hydriding process to determine the catalytic effect of intermetallic phases on MgH2 formation and decomposition. The alloys were electrochemically hydrided in a 6 mol/1KOH solution at 80 degrees C. To assess the catalytic effect of the Mg2Ni and Mg12RE phases on electrochemical hydriding performance, an optical emission spectrometer with glow discharge was employed. The temperature of dehydriding was observed by the temperature-programmed desorption technique. It was found that the only hydride formed after the electrochemical hydriding of all investigated alloys was MgH2. Both the Mg2Ni and Mg12RE phases support hydrogen absorption but in different manners. The Mg2Ni phase maximizes the hydrogen concentration beneath the surface of the binary alloys. In contrast, the Mg12RE phase decreases the maximum hydrogen surface concentration but supports inward hydrogen diffusion. The influence of the Mg12RE phase on hydrogen diffusion is most likely responsible for the reduction of the MgH2 decomposition temperature by more than 190 K compared to commercial MgH2.

Druh

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

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/GBP108%2F12%2FG043" target="_blank" >GBP108/12/G043: Mikro- a nanokrystalické materiály s vysokým podílem rozhraní pro moderní strukturní aplikace, biodegradabilní implantáty a uchovávání vodíku</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

International Journal of Hydrogen Energy

ISSN

0360-3199

e-ISSN

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Svazek periodika

41

Číslo periodika v rámci svazku

27

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

11736-11745

Kód UT WoS článku

000380627500029

EID výsledku v databázi Scopus

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