Dual-atom Co-Fe catalysts for oxygen reduction reaction

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2023, Volume and Issue: 46, P. 48 - 55

Published: Feb. 23, 2023

Language: Английский

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Recent progress of transition metal-based bifunctional electrocatalysts for rechargeable zinc–air battery application

Current Opinion in Electrochemistry, Journal Year: 2023, Volume and Issue: 38, P. 101229 - 101229

Published: Feb. 4, 2023

Language: Английский

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Aerophilic Triphase Interface Tuned by Carbon Dots Driving Durable and Flexible Rechargeable Zn-Air Batteries

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

Published: Jan. 3, 2023

Efficient bifunctional catalysts for oxygen reduction reaction (ORR) and evolution (OER) are vital rechargeable Zn-air batteries (ZABs). Herein, an oxygen-respirable sponge-like Co@C-O-Cs catalyst with oxygen-rich active sites was designed constructed both ORR OER by a facile carbon dot-assisted strategy. The aerophilic triphase interface of cathode efficiently boosts diffusion transfer. theoretical calculations experimental studies revealed that the Co-C-COC can redistribute local charge density lower energy barrier. displays superior catalytic activities half-wave potential 0.82 V ultralow overpotential 294 mV at 10 mA cm-2 OER. Moreover, it drive liquid ZABs high peak power (106.4 mW cm-2), specific capacity (720.7 mAh g-1), outstanding long-term cycle stability (over 750 cycles exhibits excellent feasibility in flexible all-solid-state ZABs. These findings provide new insights into rational design efficient metal-air batteries.

Language: Английский

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Engineering the electronic structure of isolated manganese sites to improve the oxygen reduction, Zn-air battery and fuel cell performances

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 337, P. 122966 - 122966

Published: June 7, 2023

Language: Английский

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Engineering d-band center of FeN4 moieties for efficient oxygen reduction reaction electrocatalysts

Energy storage materials, Journal Year: 2023, Volume and Issue: 59, P. 102764 - 102764

Published: April 6, 2023

Atomically-dispersed FeN4 moieties are emerging as low-cost electrocatalysts for oxygen reduction reaction (ORR), which can be applied in fuel cells and metal-air batteries. Whereas, the unsatisfactory position of d-band center from metal sites offered by affects adsorption-desorption behaviors oxygenated intermediates, further impeding improvement their ORR performances. Herein, we report a well-designed diatomic Fe/Zn-CNHC catalyst on microporous hollow support. This strategy drives Fe upward, thus making active more favorable stable during kinetic processes. The material exhibits an excellent activity with half-wave potential 0.91 V stability (insignificant attenuation after 5,000 cycles), surpassing commercial Pt/C many other single-atom catalysts. DFT calculations indicate that tuning effect Zn d-orbital electron distribution facilitates stretching cleavage Fe-O, accelerating rate-determining step. work presents simple to fabricate well-defined coordination inspires future research developing new syntheses control electrocatalysts.

Language: Английский

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Identification and Understanding of Active Sites of Non‐Noble Iron‐Nitrogen‐Carbon Catalysts for Oxygen Reduction Electrocatalysis

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(26)

Published: March 14, 2023

Non‐noble iron‐nitrogen‐carbon (Fe‐N‐C) catalysts have been explored as one type of the most promising alternatives precious platinum (Pt) in catalyzing oxygen reduction reaction (ORR). However, their catalytic ORR activity and stability still cannot meet requirement practical applications. Active sites such are key factors determining performance. This review gives a critical overview on identification understanding active sties non‐pyrolytic pyrolytic Fe‐N‐C terms design strategies, synthesis, characterization, functional mechanisms performance validation. The diversity complexity that greatly dominate progress include Fe‐containing (Fe‐based nanoparticles single‐atom Fe‐species) metal‐free (heteroatoms doping defects). Meanwhile, synergistic effects also discussed this with emphasis interaction among multiple sites. Although substantial endeavors devoted to develop efficient catalysts, some challenges remain. To facilitate further research toward applications, perspectives prospected aspects innovative synthesis methods, active‐sites modulation high‐resolution ex situ/in situ/operando characterization techniques, theoretical calculations, so on. may provide guideline for identifying developing high‐performance catalysts.

Language: Английский

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Breaking the N-limitation with N-enriched porous submicron carbon spheres anchored Fe single-atom catalyst for superior oxygen reduction reaction and Zn-air batteries

Energy storage materials, Journal Year: 2023, Volume and Issue: 59, P. 102790 - 102790

Published: April 23, 2023

Language: Английский

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Regulating the Spin‐State of Rare‐Earth Ce Single Atom Catalyst for Boosted Oxygen Reduction in Neutral Medium

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(47)

Published: July 16, 2023

Abstract The development of neutral zinc–air batteries (ZABs) is long been impeded by the sluggish oxygen reduction reaction (ORR) derived from insufficient O 2 activation and OH* blocking effect. Herein, synthesis a series rare‐earth Ce single‐atom catalysts (CeNCs) reported with enhanced spin‐state for boosting ORR. Experimental analysis theoretical calculations indicate that unique local coordination/geometric structure reshapes electronic configuration sites to achieve transition 4d 10 4f 1 8 3 . high‐spin active accelerate unpaired f electrons occupy anti‐π orbitals generate suitable binding strength intermediates. In conditions, CeNC‐40 exhibits excellent ORR performance half‐wave potentials 0.78 V negligible decay after 000 cycles. Additionally, self‐breathing ZABs based on demonstrates peak power density 81 mW cm −2 impressive long‐cycle stability (>1 600 cycles) at mA This work presents an effective strategy developing address challenges ZABs.

Language: Английский

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Recent Advances of Electrocatalyst and Cell Design for Hydrogen Peroxide Production

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

Published: April 7, 2023

Abstract Electrochemical synthesis of H 2 O via a selective two-electron oxygen reduction reaction has emerged as an attractive alternative to the current energy-consuming anthraquinone process. Herein, progress on electrocatalysts for generation, including noble metal, transition metal-based, and carbon-based materials, is summarized. At first, design strategies employed obtain with high electroactivity selectivity are highlighted. Then, critical roles geometry electrodes type reactor in striking balance boost rate systematically discussed. After that, potential strategy combine complementary properties catalysts optimal overall yield illustrated. Finally, remaining challenges promising opportunities high-efficient electrochemical production highlighted future studies.

Language: Английский

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Emerging Atomically Precise Metal Nanoclusters and Ultrasmall Nanoparticles for Efficient Electrochemical Energy Catalysis: Synthesis Strategies and Surface/Interface Engineering

Electrochemical Energy Reviews, Journal Year: 2024, Volume and Issue: 7(1)

Published: March 9, 2024

Language: Английский

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