Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Large-scale application of rechargeable Zn-air batteries requires low-cost electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) as alternatives to noble metals. Herein, FeCo nanoparticles embedded in N-doped carbon (FeCo/N-C) were prepared by a two-step pyrolysis route. FeCo/N-C exhibits excellent activities toward both the ORR (half-wave potential of 0.84 V) and OER (overpotential of 345 mV at 10 mA cm), which are comparable to those of commercial Pt/C and RuO, and by far exceeding their counterparts Fe/N-C and Co/N-C. Furthermore, the FeCo/N-C catalyst was evaluated in a rechargeable Zn-air battery for the full-cell test. The FeCo/N-C based battery is more durable with a smaller round-trip overpotential after 800 cycles than the battery using an expensive Pt/C + RuO mixture catalyst.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/d1dt02787e | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Lanthanum-Induced Gradient Fields in Asymmetric Heterointerface Catalysts for Enhanced Oxygen Electrocatalysis.
Adv Mater
September 2025
KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
Metal-nitrogen-carbon (M-N-C) catalysts display considerable potential as cost-effective alternatives to noble metals in oxygen electrocatalysis. However, uncontrolled atomic migration and random structural rearrangement during pyrolysis often lead to disordered coordination environments and sparse active sites, fundamentally limiting their intrinsic catalytic activities and long-term durability. Herein, a novel strategy is reported for use in directionally regulating atomic migration pathways via the incorporation of a foreign metal (La).
View Article and Find Full Text PDFFabrication of self-standing carbon catalyst loaded with CoFe nanoparticles embedded carbon nanotube complex for oxygen electrocatalysis and rechargeable zinc-air battery.
J Colloid Interface Sci
September 2025
State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Changping, 102249, China. Electronic address:
Carbon-based catalysts with free-standing structure are essential for rechargeable zinc-air battery as electrodes, which can avoid the side effects brought by organic binder. However, the current preparation methods still can be improved for faster preparation process and morphology control. In this study, we reported a fabrication strategy of self-standing carbon catalyst loaded with CoFe nanoparticles and carbon nanotube as air electrodes for liquid rechargeable zinc-air battery.
View Article and Find Full Text PDFDual-Cation Solvation Polymer Gel for Ultra-Stable Zn Anodes in Rechargeable Flexible Zn-Air Batteries.
Adv Mater
August 2025
State Key Laboratory of Integrated Optoelectronics, Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education, School of Physics, Northeast Normal University, 5268 Renmin Street, Changchun, 130024, China.
In semi-open rechargeable flexible zinc-air batteries (RFZABs), the polymer gel electrolyte, influenced by high-water-activity solvation structures during cycling, experiences slow ion conduction and severe dendrite growth, significantly reducing the durability of the zinc anode. This limits its application and development in wearable RFZABs. Thus, modifying the traditional single Zn solvation structure is crucial for enhancing anode stability.
View Article and Find Full Text PDFEnhanced Bifunctional Electrocatalysis of VN via D-Band Engineering for Rechargeable Zn-Air Batteries.
ACS Appl Mater Interfaces
August 2025
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.
The insufficient d-electron density in V metal atoms limits O dissociation, constraining the kinetics and activity of the oxygen reduction reaction and the oxygen evolution reaction in VN-based catalysts. Herein, Co dopant was employed to modulate the electronic characteristics of the d-orbitals and associated free energy of VN, thereby further enhancing its catalytic activity. XPS and XANES spectra revealed that Co atoms replaced V and strongly bonded with neighboring N atoms, effectively regulating the local electronic structure.
View Article and Find Full Text PDFTailoring Multiple Coordination Environments of Cobalt-Only Ladder Organic Framework for Bifunctional Oxygen Electrocatalysis.
Small
August 2025
College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China.
Developing efficient oxygen electrocatalysts is crucial for the progress of future energy conversion and storage systems. Herein, a fully conjugated ladder organic framework is designed with densely populated cobalt sites (HATN-BiSalphen@KB). The molecular characteristics of the catalytic sites provide a trustworthy model for investigating the oxygen catalysis mechanism.
View Article and Find Full Text PDF