Polymer-derived Co/Ni–SiOC(N) ceramic electrocatalysts for oxygen reduction reaction in fuel cells

Silva, Thamires Canuto de Almeida e; Mooste, Marek; Kisand, Vambola; Matisen, Leonard; Merisalu, Maido; Kook, Mati; Sammelselg, Väinö; Tammeveski, Kaido; Wilhelm, Michaela; Rezwan, Kurosch

doi:10.1039/c8cy02207k

Cited by 33 publications

(15 citation statements)

References 90 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…S4. The parameters for n calculation in acid solution were taken from our previous study [34]. In the acidic medium, the diffusionlimited current plateau is reached only for Fe/Co-CNF-900b catalyst from -0.3 V vs. SCE (Fig.…”

Section: Oxygen Reduction Studiesmentioning

confidence: 99%

Iron and cobalt containing electrospun carbon nanofibre-based cathode catalysts for anion exchange membrane fuel cell

Sokka

Mooste

Käärik

et al. 2021

International Journal of Hydrogen Energy

Self Cite

View full text Add to dashboard Cite

The use of Pt-based cathode catalyst materials hinders the widespread application of anion exchange membrane fuel cells (AEMFCs). Herein, we present a non-precious metal catalyst (NPMC) material based on pyrolysed Fe and Co co-doped electrospun carbon nanofibres (CNFs). The prepared materials are studied as oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) catalysts in alkaline and acidic environments. High activity towards the ORR in alkaline solution indicated the suitability of the prepared NPMCs for the application at the AEMFC cathode. In the AEMFC test, the membrane-electrode assembly bearing a cathode with the nanofibre-based catalyst prepared with the ionic liquid (IL) (Fe/Co/IL-CNF-800b) showed the maximum power density (Pmax) of 195 mW cm −2 , which is 78 % of the Pmax obtained with a commercial Pt/C cathode catalyst. Such high ORR

show abstract

Section: Oxygen Reduction Studiesmentioning

confidence: 99%

Iron and cobalt containing electrospun carbon nanofibre-based cathode catalysts for anion exchange membrane fuel cell

Sokka

Mooste

Käärik

et al. 2021

International Journal of Hydrogen Energy

Self Cite

View full text Add to dashboard Cite

show abstract

“…5d). 50 In the case of OER, the Ni/PDC sample outperforms the standard Pt, Ru/C catalyst and is signicantly more active than the other transition metal doped catalysts. Ni/PDC exhibits the lowest potential of 1.61 V vs. RHE compared with Pt, Ru/C (1.67 V vs. RHE) when the current density reaches 10 mA cm À2 (Fig.…”

Section: Resultsmentioning

confidence: 98%

“… 49 Similar electrochemical ORR behavior has been observed with pristine and transition metal (Co and Ni) doped SiOC ceramic catalyst. 50 Fig. 5c–e shows the oxygen reduction performance of Ni/PDC and Co/PDC catalyst at different rotation rates.…”

Section: Resultsmentioning

confidence: 99%

One-dimensional polymer-derived ceramic nanowires with electrocatalytically active metallic silicide tips as cathode catalysts for Zn–air batteries

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Pioneering studies [17,[22][23][24] have shown that the incorporation of solid filler particles into the preceramic matrix can reduce the gas formation and the associated volume shrinkage during pyrolysis, thus reducing the formation of cracks and preventing the collapse of micro-and mesopores, resulting in a porous ceramic phase after the polymer-to-ceramic conversion. Aside from this, the addition of filler particles could provide additional functional properties such as hydrophilicity [25], high hardness/wear resistance [26], magnetic and electrical functionalities [27][28][29], and catalytic performance [30,31].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Pyrolysis Temperature and TiO2-Incorporation on the Properties of SiOC/SiC Composites for Efficient Wastewater Treatment Applications

et al. 2022

Self Cite

View full text Add to dashboard Cite

This study focuses on the development of porous ceramer and SiOC composites which are suitable for microfiltration applications, using a mixture of polysiloxanes as the preceramic precursor. The properties of the membranes—such as their pore size, hydrophilicity, specific surface area, and mechanical resistance—were tailored in a one-step process, according to the choice of pyrolysis temperatures (600–1000 °C) and the incorporation of micro- (SiC) and nanofillers (TiO2). Lower pyrolysis temperatures (<700 °C) allowed the incorporation of TiO2 in its photocatalytically active anatase phase, enabling the study of its photocatalytic decomposition. The produced materials showed low photocatalytic activity; however, a high adsorption capacity for methylene blue was observed, which could be suitable for dye-removal applications. The membrane performance was evaluated in terms of its maximum flexural strength, water permeation, and separation of an oil-in-water emulsion. The mechanical resistance increased with an increase of the pyrolysis temperature, as the preceramic precursor underwent the ceramization process. Water fluxes varying from 2.5 to 370 L/m2·h (2 bar) were obtained according to the membrane pore sizes and surface characteristics. Oil-rejection ratios of 81–98% were obtained at an initial oil concentration of 1000 mg/L, indicating a potential application of the produced PDC membranes in the treatment of oily wastewater.

show abstract

Polymer-derived Co/Ni–SiOC(N) ceramic electrocatalysts for oxygen reduction reaction in fuel cells

Abstract: For the first time, the oxygen reduction reaction on transition metal and nitrogen doped SiOC-based electrocatalysts is studied.

Cited by 33 publications

References 90 publications

Iron and cobalt containing electrospun carbon nanofibre-based cathode catalysts for anion exchange membrane fuel cell

Iron and cobalt containing electrospun carbon nanofibre-based cathode catalysts for anion exchange membrane fuel cell

One-dimensional polymer-derived ceramic nanowires with electrocatalytically active metallic silicide tips as cathode catalysts for Zn–air batteries

Influence of the Pyrolysis Temperature and TiO2-Incorporation on the Properties of SiOC/SiC Composites for Efficient Wastewater Treatment Applications

Contact Info

Product

Resources

About