Electroreduction of oxygen on iron- and cobalt-containing nitrogen-doped carbon catalysts prepared from the rapeseed press cake

Juvanen, Silver; Sarapuu, Ave; Mooste, Marek; Käärik, Maike; Mäeorg, Uno; Kikas, Arvo; Kisand, Vambola; Kozlova, Jekaterina; Treshchalov, Alexey; Aruväli, Jaan; Leis, Jaan; Tamm, Aile; Kisand, Vambola

doi:10.1016/j.jelechem.2022.116599

Cited by 8 publications

(3 citation statements)

References 83 publications

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“…During pyrolysis, DCDA polymerizes below 600 °C, forming layers of graphitic carbon nitride (g-C 3 N 4 ) between the carbon precursor . As the temperature rises, g-C 3 N 4 decomposes into reactive gaseous nitrogen species, incorporating nitrogen into the newly formed carbon framework. − , Thus, DCDA serves a dual role by helping to create a layered porous structure and providing nitrogen atoms as dopants.…”

Section: Results and Discussionmentioning

confidence: 99%

“…60 As the temperature rises, g-C 3 N 4 decomposes into reactive gaseous nitrogen species, incorporating nitrogen into the newly formed carbon framework. [20][21][22][23]61 Thus, DCDA serves a dual role by helping to create a layered porous structure and providing nitrogen atoms as dopants.…”

Section: Structural Characterizationmentioning

confidence: 99%

“…From various precious metal-free electrocatalysts for ORR, nanostructured carbon materials doped with nitrogen and transition metals (M–N–C catalysts) have proven to be particularly advantageous, especially in alkaline conditions. , The ORR-active sites in such materials are suggested to be the nitrogen-coordinated atomically dispersed metal centers (M–N x ); in alkaline media also various other nitrogen species, such as pyridinic, graphitic, or pyrrolic nitrogen play a role. − Such catalysts are most often prepared either by functionalization of nanostructured carbon materials, e.g., carbon black, − carbon nanotubes, carbide-derived carbon, graphene, mesoporous carbons, and composites of these, − or by carbonization of organic precursors along with transition metal and nitrogen sources. − ,− Thanks to its low cost and abundance, biomass is frequently used as an organic precursor, while its nature, structure, and chemical composition greatly influence the properties of the resulting carbon materials. ,− Lignin is an abundant component in plant biomass and a waste product of the paper industry, which due to its high carbon content has often been used as a precursor for the preparation of carbon materials by pyrolysis . Among the other applications, lignin-derived heteroatom-doped and transition metal-containing catalysts have been studied as catalysts for ORR, − or as bifunctional electrocatalysts for ORR and the oxygen evolution reaction. − …”

Section: Introductionmentioning

confidence: 99%

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Lignin-Derived Precious Metal-Free Electrocatalysts for Anion-Exchange Membrane Fuel Cell Application

Sajjad,

Sarapuu,

Douglin

et al. 2024

ACS Catal.

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A facile method for the preparation of precious metal-free catalysts for the oxygen reduction reaction (ORR) from lignin, dicyandiamide, and transition metal salts is presented. Magnesium acetate was employed as a precursor for a sacrificial template, enhancing the porous structure of the catalysts. Iron content in the catalyst materials was optimized and a bimetallic catalyst containing Fe and Co was also prepared. The physicochemical analysis revealed uniform dispersion of various nitrogen moieties and transition metal centers on sheet-like carbon structures, along with some carbon-encapsulated metal-rich nanoparticles. Rotating disc electrode tests in an alkaline solution demonstrated the dependence of the ORR performance of the catalysts on their iron content and confirmed the high stability of both iron and bimetallic catalysts over 10,000 potential cycles. Anion-exchange membrane fuel cell (AEMFC) studies revealed that the bimetallic catalyst outperforms the Fe-containing material, achieving a very promising peak power density of 675 mW cm −2 at 60 °C and 833 mW cm −2 at 80 °C.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Structural Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Lignin-Derived Precious Metal-Free Electrocatalysts for Anion-Exchange Membrane Fuel Cell Application

Sajjad,

Sarapuu,

Douglin

et al. 2024

ACS Catal.

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View full text Add to dashboard Cite

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Hierarchically Porous Fe−N−C Single‐Atom Catalysts via Ionothermal Synthesis for Oxygen Reduction Reaction

Kisand,

Sarapuu,

Douglin

et al. 2024

ChemSusChem

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Platinum group metal (PGM)‐free electrocatalysts have emerged as promising alternatives to replace Pt for the oxygen reduction reaction (ORR) in anion exchange membrane fuel cells (AEMFCs). However, traditional synthesis methods limit the single‐atom site density due to metal agglomeration at higher temperatures. This work explores the preparation of hierarchically porous atomically dispersed electrocatalysts for the ORR. The materials were prepared via ionothermal synthesis, where magnesium nitrate was used to prepare hierarchically porous carbon materials. The in‐situ formed Mg‐Nx sites were trans‐metalated to yield ORR‐active Fe‐Nx sites. The resulting carbon‐based catalysts displayed excellent electrocatalytic activity, attributed to the atomically dispersed Fe‐Nx active sites and high meso‐ and macroporosity that enhances the mass transport and exposes more accessible active sites.

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PGM-Free Biomass-Derived Electrocatalysts for Oxygen Reduction in Energy Conversion Devices: Promising Materials

Zago,

Scarpetta-Pizo,

Zagal

et al. 2024

Electrochem. Energy Rev.

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Biomass is a low-cost, abundant and renewable resource that can be used to manufacture porous carbon-based materials for a variety of applications. Different mesoporous carbon supports can be obtained from the various synthetic approaches that are aimed at increasing the specific surface area and functionalization. Currently, most of the biomass is used for energy recovery. The circular economy approach could lead to the development of cheap and sustainable materials, and turning of wastes into a precious resource. In this review, we provide the recent advances in the field of electrochemistry for porous carbon materials derived from biomass, which offers wider applications in proton exchange membrane fuel cells (PEMFCs), anion exchange membrane fuel cells (AEMFCs) and Zn-air batteries (ZABs). The focus is on understanding the required properties of the materials and the role of synthetic pathways in platinum group metal (PGM) free electrocatalysts. The most promising materials are evaluated towards the oxygen reduction reaction (ORR) in PEMFC, AEMFC, and ZAB. The results achieved showed that the expected performances on these energy conversion devices still lack for deployment in practice, especially if compared with commercially available PGM-free electrocatalysts. This review article provides insights on how to improve the actual electrocatalytic activity of biomass-derived materials. Graphical Abstract

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Electroreduction of oxygen on iron- and cobalt-containing nitrogen-doped carbon catalysts prepared from the rapeseed press cake

Cited by 8 publications

References 83 publications

Lignin-Derived Precious Metal-Free Electrocatalysts for Anion-Exchange Membrane Fuel Cell Application

Lignin-Derived Precious Metal-Free Electrocatalysts for Anion-Exchange Membrane Fuel Cell Application

Hierarchically Porous Fe−N−C Single‐Atom Catalysts via Ionothermal Synthesis for Oxygen Reduction Reaction

PGM-Free Biomass-Derived Electrocatalysts for Oxygen Reduction in Energy Conversion Devices: Promising Materials

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