NiCoPx catalyst for electrochemical water splitting: activity and stability under the alkaline water electrolysis conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43918500" target="_blank" >RIV/60461373:22310/19:43918500 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

NiCoPx catalyst for electrochemical water splitting: activity and stability under the alkaline water electrolysis conditions

Popis výsledku v původním jazyce

Water electrolysis, in combination with renewable energy sources, has come to the forefront of interest during the last decade because of its ability to efficiently convert excess electrical energy into chemical energy of hydrogen. On an industrial scale, the most well-established route is that of alkaline water electrolysis (AWE). However, since this technology was originally designed for long-term stable operation, the above-mentioned combination with renewable energy sources places new demands on the process. Hence, in recent years significant research activity has focused on different aspects of AWE with the aim to increase its efficiency and flexibility. One of the important, and thus most widely investigated, topics in this field is to find an inexpensive electrocatalyst with high stability in an alkaline environment and good catalytic activity for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). In this work, NiCoPx catalyst was synthesized by cathodic electrodeposition on Ni substrate and tested under the AWE conditions. The composition, morphology along with the transformation of the material during the AWE process were characterized by several analytical methods - XRD, XPS, SEM, etc. The electrochemical properties were evaluated by means of Tafel analysis, cyclic voltammetry and electrochemical impedance spectroscopy. The results suggest excellent catalytic activity of the material for both OER and HER. The composition and morphology of the material changes under the oxidative conditions in alkaline media – formation of corresponding oxides and hydroxides. These species show enhanced catalytic activity for the OER but significantly lower activity for the HER. Financial support of this research by the Ministry of the Industry and Trade of the Czech Republic under the project No. FV10529 and from specific university research (MSMT No 21-SVV/2019) is gratefully acknowledged

Název v anglickém jazyce

NiCoPx catalyst for electrochemical water splitting: activity and stability under the alkaline water electrolysis conditions

Popis výsledku anglicky

Water electrolysis, in combination with renewable energy sources, has come to the forefront of interest during the last decade because of its ability to efficiently convert excess electrical energy into chemical energy of hydrogen. On an industrial scale, the most well-established route is that of alkaline water electrolysis (AWE). However, since this technology was originally designed for long-term stable operation, the above-mentioned combination with renewable energy sources places new demands on the process. Hence, in recent years significant research activity has focused on different aspects of AWE with the aim to increase its efficiency and flexibility. One of the important, and thus most widely investigated, topics in this field is to find an inexpensive electrocatalyst with high stability in an alkaline environment and good catalytic activity for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). In this work, NiCoPx catalyst was synthesized by cathodic electrodeposition on Ni substrate and tested under the AWE conditions. The composition, morphology along with the transformation of the material during the AWE process were characterized by several analytical methods - XRD, XPS, SEM, etc. The electrochemical properties were evaluated by means of Tafel analysis, cyclic voltammetry and electrochemical impedance spectroscopy. The results suggest excellent catalytic activity of the material for both OER and HER. The composition and morphology of the material changes under the oxidative conditions in alkaline media – formation of corresponding oxides and hydroxides. These species show enhanced catalytic activity for the OER but significantly lower activity for the HER. Financial support of this research by the Ministry of the Industry and Trade of the Czech Republic under the project No. FV10529 and from specific university research (MSMT No 21-SVV/2019) is gratefully acknowledged

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/FV10529" target="_blank" >FV10529: Pokročilá elektrolytická výroba vodíku z OZE</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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