Recent Progress of Non-Pt Catalysts for Oxygen Reduction Reaction in Fuel Cells

Processes, Journal Year: 2023, Volume and Issue: 11(2), P. 361 - 361

Published: Jan. 23, 2023

In recent years, non-Pt-based ORR catalysts have been developing rapidly and achieved performance comparable to or even surpassing Pt precious metal in specific reactions, offering new possibilities for Pt-based catalyst replacement showing great promise application. This paper reviews the research progress of fuel cell catalysts. The latest SACs (including single active site SACs, multi-metal noble SACs), non-metallic catalysts, alloy-based high-entropy alloy other are presented detail. discusses detail synthesis methods, characterization means, optimization performance, application prospects these addition, this review details excellent terms compositional structural controllability, electrical conductivity, chemical stability, as well their ability exhibit activity that commercial Pt/C field is full opportunities challenges. summary, cells show potential ORR. With continuous improvement preparation technologies, broad market prospects. development trend non-precious reviewed.

Language: Английский

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Inducing Fe 3d Electron Delocalization and Spin-State Transition of FeN4 Species Boosts Oxygen Reduction Reaction for Wearable Zinc–Air Battery

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: Feb. 10, 2023

Transition metal-nitrogen-carbon materials (M-N-Cs), particularly Fe-N-Cs, have been found to be electroactive for accelerating oxygen reduction reaction (ORR) kinetics. Although substantial efforts devoted design Fe-N-Cs with increased active species content, surface area, and electronic conductivity, their performance is still far from satisfactory. Hitherto, there limited research about regulation on the spin states of Fe centers electrocatalysts improve catalytic performance. Here, we introduce Ti3C2 MXene sulfur terminals regulate configuration FeN4 dramatically enhance activity toward ORR. The induce spin-state transition 3d electron delocalization d band center upshift, enabling Fe(II) ions bind in end-on adsorption mode favorable initiate boosting oxygen-containing groups ORR resulting FeN4-Ti3C2Sx exhibits comparable those commercial Pt-C. developed wearable ZABs using also exhibit fast kinetics excellent stability. This study confirms that structure via coupling support can a major contributor activity.

Language: Английский

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Template-assisted synthesis of ultrathin graphene aerogels as bifunctional oxygen electrocatalysts for water splitting and alkaline/neutral zinc-air batteries

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 458, P. 141492 - 141492

Published: Jan. 18, 2023

Language: Английский

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Quasi-Three-Dimensional Cyclotriphosphazene-Based Covalent Organic Framework Nanosheet for Efficient Oxygen Reduction

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: June 29, 2023

Metal-free carbon-based materials are considered as promising oxygen reduction reaction (ORR) electrocatalysts for clean energy conversion, and their highly dense exposed carbon active sites crucial efficient ORR. In this work, two unique quasi-three-dimensional cyclotriphosphazene-based covalent organic frameworks (Q3CTP-COFs) nanosheets were successfully synthesized applied ORR electrocatalysts. The abundant electrophilic structure in Q3CTP-COFs induces a high density of sites, the bilayer stacking [6 + 3] imine-linked backbone facilitates exposure accelerates mass diffusion during particular, bulk can be easily exfoliated into thin COF (NSs) due to weak interlayer π-π interactions. Q3CTP-COF NSs exhibit catalytic activity (half-wave potential 0.72 V vs. RHE alkaline electrolyte), which is one best COF-based reported so far. Furthermore, serve cathode Zn-air batteries (delivered power 156 mW cm

Language: Английский

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Metal-mediated Schiff base polymer enables metal/nitrogen codoped carbon nanosheets as efficient bifunctional electrocatalyst for durable rechargeable Zn-air batteries

Energy storage materials, Journal Year: 2023, Volume and Issue: 59, P. 102783 - 102783

Published: April 19, 2023

Language: Английский

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