Catalytic Applications of Natural Iron Oxides and Hydroxides: A Review

Catalysts, Год журнала: 2025, Номер 15(3), С. 236 - 236

Опубликована: Фев. 28, 2025

Iron oxides and hydroxides (Fe-OH) extracted from natural sources have garnered significant attention for their diverse catalytic applications. This article provides a comprehensive overview of the potential naturally occurring Fe-OH, focusing on influence preparation methods morphological characteristics application in heterogeneous catalysis. The unique physicochemical properties these catalysts, including high surface area, redox activity, tunable chemistry, make them promising candidates various processes. review discusses key reactions facilitated by such as advanced oxidation processes (AOPs), electrochemical applications, cracking, biodiesel production. Furthermore, it highlights recent advancements challenges utilizing materials catalysts. By presenting an analysis iron oxides, this aims to stimulate further research about use materials, which are widely distributed Earth’s crust.

Язык: Английский

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Facile synthesis of MnO/NC nanohybrids toward high-efficiency ORR for zinc–air battery

RSC Advances, Год журнала: 2024, Номер 14(33), С. 24031 - 24038

Опубликована: Янв. 1, 2024

The MnO/NC nanohybrids were synthesized via a facile hydrothermal-pyrolysis strategy, showing enhanced ORR activity and promising ZAB performance.

Язык: Английский

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In situ construction of high-content Fe, N co-doped carbon nanotube networks for efficient oxygen reduction reactions in both alkaline and acidic environments

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 178815 - 178815

Опубликована: Янв. 1, 2025

Язык: Английский

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Discover the Evolution: A Comprehensive Review of Transition and Rare Earth Metals for Oxygen Reduction Reaction, from Mono to High‐Entropy Catalysts

The Chemical Record, Год журнала: 2025, Номер unknown

Опубликована: Апрель 10, 2025

Abstract Green energy, including metal‐air batteries and fuel cells, is the key solution to climate change. The efficiency of these energy technologies depends on oxygen reduction reaction (ORR) at cathode, which a slow process requiring expensive noble metal catalysts, like platinum, for improvement. high cost this catalyst restricts its widespread use in producing cells. An alternative approach utilize non‐noble metals, such as transition rare earth are more cost‐effective demonstrate comparable durability effectiveness metals. With their affordability distinct electronic structure, metals have potential revolutionize industry. Transition can enhance ORR catalysts by manipulating surface molecular makeup through ′doping′ ′synergistic effects′. This article discusses roles various process, covering fundamental advanced levels, well progression from mono high‐entropy systems (systems with increasing complexity improved performance), bi‐, tri‐, tetra‐metallic comprehensive manner, emphasizes opportunities researchers propose innovative strategies optimizing process.

Язык: Английский

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Effect of Fe–N–C single atom/cluster catalyst on ORR of PEMFC

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 139, С. 718 - 729

Опубликована: Май 27, 2025

Язык: Английский

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Perceptions of metal-nitrogen-carbon catalysts for oxygen reduction reaction

Materials Science and Engineering R Reports, Год журнала: 2025, Номер 165, С. 101027 - 101027

Опубликована: Май 30, 2025

Язык: Английский

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Enhanced oxygen reduction reaction with rare-earth metal-based Ce-N-C catalyst

International Journal of Hydrogen Energy, Год журнала: 2024, Номер unknown

Опубликована: Сен. 1, 2024

Язык: Английский

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CoNi-N/P-Doped Carbon Nanotubes as Catalysts for Efficient Oxygen Reduction Reaction

Langmuir, Год журнала: 2024, Номер 40(32), С. 17071 - 17080

Опубликована: Июль 30, 2024

Transition metals (TMs) supported by heteroatom-doped carbon materials are considered to be the potential alternatives Pt/C catalyst owing their low cost, outstanding electrocatalytic efficiency, and excellent electrochemical durability. In this paper, N/P-doped nanotube (CNT) (N/P-CNT)-supported monometallic (Co, Ni) bimetallic (CoNi) catalysts were synthesized one-step pyrolysis using diammonium hydrogen phosphate, 2-methylimidazole organometallic salts as precursors, CNT carrier; effects of transition TM types temperature (Tp) on microstructure properties explored. The analysis exhibited that CoNi was superior both Co Ni catalysts, pyrolyzed at 900 °C a better graphitization degree. optimal CoNi-N/P-CNT-900 displayed remarkable oxygen reduction reaction performance with half-wave (E1/2) 0.86 V methanol tolerance stability. Moreover, Zn-air battery coated demonstrated larger open circuit voltage 1.577 V, peak power density 212.89 mW cm–2 357.8 mA cm–2, well higher specific capacity 799 h gZn–1, (1.492 96.04 216.8 735 gZn–1), showing practical value. This study is expected promote commercialization electrocatalysts.

Язык: Английский

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Tailoring the electronic structure of Fe–N4 sites via heteroatom modification strategy for boosting oxygen reduction in hydrogen fuel cells: A density functional theory study

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 72, С. 220 - 225

Опубликована: Май 29, 2024

Язык: Английский

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Iron‐ and Nitrogen‐Containing Carbon Nanotube/Carbide‐Derived Carbon‐Based Electrocatalysts for Oxygen Reduction Reaction in Acidic Conditions

ChemElectroChem, Год журнала: 2024, Номер unknown

Опубликована: Сен. 6, 2024

Abstract In this work, iron‐ and nitrogen‐doped carbide‐derived carbon nanotube (CDC/CNT) composites are prepared used as oxygen reduction reaction (ORR) electrocatalysts in acidic conditions. Three different approaches taken to mix iron nitrogen precursors, namely iron(II) acetate 1,10‐phenanthroline, with the nanocarbon materials. The doping is done via high‐temperature pyrolysis. success of proved by several physicochemical methods indicating that atomically dispersed. Fe−N−C catalyst materials possess similar textural properties high specific surface area plenty pores sizes. evaluation ORR activity using rotating (ring−)disk electrode method shows have very good electrocatalytic performance media low yield H 2 O formation. This excellent attributed presence Fe−N x pyridinic‐N moieties, well a feasible porous structure.

Язык: Английский

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