Influence of the carbon support on the catalytic properties of selenide-based electrocatalyst for oxygen reduction reaction in an alkaline fuel cell

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Influence of the carbon support on the catalytic properties of selenide-based electrocatalyst for oxygen reduction reaction in an alkaline fuel cell

Popis výsledku v původním jazyce

Alkaline fuel cells (AFCs) are perspective device for energy conversion stored in the hydrogen bond into electric energy. Their main advantages are high efficiency compared to competitive fuel cells and possibility to use non-platinum materials for electrodes and catalysts which is associated with lower investment costs. However, the commercial alkaline fuel cells use typically expensive platinum-based catalysts for oxygen reduction reaction due to their high activity [1]. Nevertheless, selenide-based materials represent promising cost-effective alternatives, not least due to their stability in alkaline environments, electrocatalytic activity and simple preparation [2]. While these catalysts generally have low electrical conductivity and a small specific surface area, such drawbacks can be overcome by using proper catalyst support [2]. The most common catalyst supports represent carbon-based materials due to their abundance, low price, remarkable electric conductivity and high specific surface area [3]. The carbon-based materials are mostly used in form of carbon black, carbon nanotubes, graphite, graphene or graphene oxide [3].Here, we describe the solvothermal synthesis of Co0,83Ni0,17Se2 catalyst on the different types of carbon support. As the carbon supports were selected: commercial carbon black Vulcan XC72R, graphite and graphene oxide. This study aims to investigate the influence of the different types of carbon support on the physical and electrochemical properties of the catalysts. Also, the optimal ratio between carbon support and the catalyst was optimized. Physical properties were determined using X-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy. The electrochemical performance of the catalyst was evaluated using electrochemical impedance spectroscopy and linear sweep voltammetry on the rotating disk electrode in 0.1 mol dm-3 KOH at 30 °C. Based on the results obtained, all the carbon supports have positive influence on the physical properties of the catalysts.

Název v anglickém jazyce

Influence of the carbon support on the catalytic properties of selenide-based electrocatalyst for oxygen reduction reaction in an alkaline fuel cell

Popis výsledku anglicky

Alkaline fuel cells (AFCs) are perspective device for energy conversion stored in the hydrogen bond into electric energy. Their main advantages are high efficiency compared to competitive fuel cells and possibility to use non-platinum materials for electrodes and catalysts which is associated with lower investment costs. However, the commercial alkaline fuel cells use typically expensive platinum-based catalysts for oxygen reduction reaction due to their high activity [1]. Nevertheless, selenide-based materials represent promising cost-effective alternatives, not least due to their stability in alkaline environments, electrocatalytic activity and simple preparation [2]. While these catalysts generally have low electrical conductivity and a small specific surface area, such drawbacks can be overcome by using proper catalyst support [2]. The most common catalyst supports represent carbon-based materials due to their abundance, low price, remarkable electric conductivity and high specific surface area [3]. The carbon-based materials are mostly used in form of carbon black, carbon nanotubes, graphite, graphene or graphene oxide [3].Here, we describe the solvothermal synthesis of Co0,83Ni0,17Se2 catalyst on the different types of carbon support. As the carbon supports were selected: commercial carbon black Vulcan XC72R, graphite and graphene oxide. This study aims to investigate the influence of the different types of carbon support on the physical and electrochemical properties of the catalysts. Also, the optimal ratio between carbon support and the catalyst was optimized. Physical properties were determined using X-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy. The electrochemical performance of the catalyst was evaluated using electrochemical impedance spectroscopy and linear sweep voltammetry on the rotating disk electrode in 0.1 mol dm-3 KOH at 30 °C. Based on the results obtained, all the carbon supports have positive influence on the physical properties of the catalysts.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

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

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

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