Optimization of synthesis of the nickel-cobalt oxide based anode electrocatalyst and of the related membrane-electrode assembly for alkaline water electrolysis

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43913635" target="_blank" >RIV/60461373:22310/17:43913635 - isvavai.cz</a>

Result on the web

<a href="https://ac.els-cdn.com/S0378775317302318/1-s2.0-S0378775317302318-main.pdf?_tid=80a2fba0-0114-11e8-ab5f-00000aab0f6c&acdnat=1516805000_9c6f3cabe115bb43dbc7626815e0e52b" target="_blank" >https://ac.els-cdn.com/S0378775317302318/1-s2.0-S0378775317302318-main.pdf?_tid=80a2fba0-0114-11e8-ab5f-00000aab0f6c&acdnat=1516805000_9c6f3cabe115bb43dbc7626815e0e52b</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jpowsour.2017.02.057" target="_blank" >10.1016/j.jpowsour.2017.02.057</a>

Result language

angličtina

Original language name

Optimization of synthesis of the nickel-cobalt oxide based anode electrocatalyst and of the related membrane-electrode assembly for alkaline water electrolysis

Original language description

In this work, the Ni-Co spinel oxides are synthesized via different methods and using different calcination temperatures. Properties of the prepared materials are compared. The best route is selected and used to prepare a Ni1+xCo2-xO4 (-1 &lt;= x &lt;= 1) series of materials in order to investigate their catalytic activity towards the oxygen evolution reaction (OER). The results show that hydroxide preparation yields NiCo2O4 oxide with the highest activity. 325 degrees C is identified as the optimum calcination temperature. Subsequently, the catalysts are tested in an electrolysis cell. To prepare an anode catalyst layer based on NiCo2O4 catalyst on top of a nickel foam substrate for membrane electrode assembly (MEA) construction, following polymer binders are used: anion-selective quaternized polyphenylene oxide (qPPO), inert polytetrafluoroethylene (PTFE (R)), and cation-selective Nafion (R). qPPO ionomer containing MEA exhibited highest OER activity. The current density obtained using a MEA containing qPPO binder attains a value of 135 mA cm(-2) at a cell voltage of 1.85 V. After 7 h chronopotentiometric experiment at a constant current density of 225 mA cm 2, the MEA employing PTFE (R) binder shows higher stability than the other binders in alkaline water electrolysis at 50 degrees C. Under similar conditions, stability of the PTFE (R)-binding MEA is examined for 135 h. Crown

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10404 - Polymer science

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

Journal of Power Sources

ISSN

0378-7753

e-ISSN

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Volume of the periodical

347

Issue of the periodical within the volume

April

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

247-258

UT code for WoS article

000396955100026

EID of the result in the Scopus database

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