High‐Density Accessible Iron Single‐Atom Catalyst for Durable and Temperature‐Adaptive Laminated Zinc‐Air Batteries DOI Open Access

Lan Ling,

Yonggan Wu,

Yukui Pei

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Abstract Designing single‐atom catalysts (SACs) with high density of accessible sites by improving metal loading and utilization is a promising strategy to boost the catalytic activity, but remains challenging. Herein, site (SD) iron SAC (D‐Fe‐N/C) 11.8 wt.% Fe‐loading reported. The in situ scanning electrochemical microscopy technique attests that active SD D‐Fe‐N/C reach as 1.01 × 10 21 g −1 79.8%, respectively. Therefore, demonstrates superior oxygen reduction reaction (ORR) activity terms half‐wave potential 0.918 V turnover frequency 0.41 e s . excellent ORR property also demonstrated liquid zinc‐air batteries (ZABs), which exhibit peak power 306.1 mW cm −2 an ultra‐long cycling stability over 1200 h. Moreover, solid‐state laminated ZABs prepared presetting air flow layer show specific capacity 818.8 mA h , 520 h, wide temperature‐adaptive from −40 60 °C. This work not only offers possibilities metal‐loading for exploring efficient SACs, provides strategies device structure design toward advanced ZABs.

Language: Английский

Size-dependent activity of Fe-N-doped mesoporous carbon nanoparticles towards oxygen reduction reaction DOI Creative Commons

Yilun Zhao,

Zhengbin Tian, Wenquan Wang

et al.

Green Carbon, Journal Year: 2024, Volume and Issue: 2(2), P. 221 - 230

Published: April 1, 2024

The rational design of Fe-N-C catalysts that possess easily accessible active sites and favorable mass transfer, which are usually determined by the structure catalyst supports, is crucial for oxygen reduction reaction (ORR). In this study, an oleic acid-assisted soft-templating approach developed to synthesize size-controlled nitrogen-doped carbon nanoparticles (ranging from 130 nm 60 35 nm, respectively) feature spiral mesopores on their surface (SMCs). Next, atomically dispersed Fe-Nx fabricated size-tunable SMCs (Fe1/SMC-x, where x represents SMC size) size-dependent activity toward ORR investigated. It found catalytic performance Fe1/SMCs significantly influenced size SMCs, Fe1/SMC-60 shows highest with a half-wave potential 0.90 V vs. RHE in KOH electrolyte, indicating gas-liquid-solid three-phase interface enhances accessibility sites. addition, when using as cathode aqueous zinc-air batteries (ZABs), it delivers higher open-circuit voltage (1.514 V), greater power density (223 mW cm-2), larger specific capacity/energy than Pt/C-based counterparts. These results further highlight practical energy devices associated importance synthesis SMCs.

Language: Английский

Citations

18
Superstructured Carbon with Enhanced Kinetics for Zinc‐Air Battery and Self‐Powered Overall Water Splitting DOI
Jiamin Wei,

Jiali Lou,

Weibo Hu

et al.

Small, Journal Year: 2024, Volume and Issue: 20(24)

Published: Jan. 6, 2024

Abstract The present study proposes a novel engineering concept for the customization of functionality and construction superstructure to fabricate 2D monolayered N‐doped carbon electrocatalysts decorated with Co single atoms or 2 P nanoparticles derived from bimetallic ZnCo‐ZIF precursors. hierarchically porous maximizes exposure accessible active sites, enhances electron/mass transport efficiency, accelerates reaction kinetics simultaneously. Consequently, embedded (Co‐NCS) exhibits remarkable catalytic activity toward oxygen reduction reaction, achieving half‐wave potential 0.886 V versus RHE. Additionally, (Co P‐NCS) demonstrates high both evolution hydrogen delivering low overpotentials 292 mV at 10 mA cm −2 193 respectively. Impressively, when employed in an assembled rechargeable Zn‐air battery, as‐prepared exhibit exceptional performance peak power density 219 mW minimal charge/discharge voltage gap only 1.16 100 . Moreover, cell required drive overall water‐splitting electrolyzer current is merely 1.69 using these catalysts as electrodes.

Language: Английский

Citations

17
Modulating the Energy Barrier via the Synergism of Cu3P and CoP to Accelerate Kinetics for Bolstering Oxygen Electrocatalysis in Zn-Air Batteries DOI
Man Guo,

Lixia Wang,

Zhiyang Huang

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 18(27), P. 17901 - 17912

Published: June 24, 2024

Modulating the energy barrier of reaction intermediates to surmount sluggish kinetics is an utterly intriguing strategy for amplifying oxygen reduction reaction. Herein, a Cu3P/CoP hybrid incorporated on hollow porous N-doped carbon nanospheres via dopamine self-polymerization and high-temperature treatment. The resultant Cu3P/CoP@NC showcases favorable mass activity 4.41 mA mg–1 kinetic current density 2.38 cm–2. Strikingly, catalyst endows aqueous Zn-air battery (ZAB) with large power 209.0 mW cm–2, superb cyclability over 317 h, promising application prospects in flexible ZAB. Theoretical simulations reveal that Cu functions as modulator modify free adsorbs O2 Co sites, hence rushing kinetics. open hydrophilic spherical mesoporous structure provides unimpeded channels reactant diffusion electrolyte penetration, whereas exposed inner outer surfaces can confer plethora accessible actives sites. This research establishes feasible design concept tune catalytic non-noble metal materials by construction rational nanoframework.

Language: Английский

Citations

16
Electron Distribution Regulation of Nanoparticle Assembled Hollow Structured Fe3O4@ZnFe2O4@NC/Mo2TiC2Tx for High‐Performance Aqueous Zinc‐Ion Batteries DOI Open Access
Xiaohui Guan, Jiqing Zhang,

Enze Zhu

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Abstract Exploring advanced high‐performance electrode materials for aqueous zinc‐ion batteries (AZIBs) is of enormous significance the development and commercial application AZIBs. Herein, nanoparticle assemble hollow structured Fe 3 O 4 @ZnFe 2 @NC/Mo TiC T x with excellent specific capacity cycling performance fabricated via a designed method, an strategy First proposed to modulate charge storage performance. The superior can be attributed enhanced electrochemical activity reversibility, which are mainly achieved by in situ Zn adulteration trigger electron redistribution between Fe, Zn, atoms. Additionally, unique structure multiple components provide plentiful active sites, ameliorating affinity electrolyte facilitating kinetics. great ascribed improved structural stability loading two robust substrates intimately coated carbon MXene. renders distinctly higher (364.4 mAh·g −1 ) than that (92.2 ), @NC (211.2 (276.8 as well 86.2% retention over 1000 cycles. Moreover, mechanism new effects composition regulation revealed characterizations computations.

Language: Английский

Citations

2
High‐Density Accessible Iron Single‐Atom Catalyst for Durable and Temperature‐Adaptive Laminated Zinc‐Air Batteries DOI Open Access

Lan Ling,

Yonggan Wu,

Yukui Pei

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Abstract Designing single‐atom catalysts (SACs) with high density of accessible sites by improving metal loading and utilization is a promising strategy to boost the catalytic activity, but remains challenging. Herein, site (SD) iron SAC (D‐Fe‐N/C) 11.8 wt.% Fe‐loading reported. The in situ scanning electrochemical microscopy technique attests that active SD D‐Fe‐N/C reach as 1.01 × 10 21 g −1 79.8%, respectively. Therefore, demonstrates superior oxygen reduction reaction (ORR) activity terms half‐wave potential 0.918 V turnover frequency 0.41 e s . excellent ORR property also demonstrated liquid zinc‐air batteries (ZABs), which exhibit peak power 306.1 mW cm −2 an ultra‐long cycling stability over 1200 h. Moreover, solid‐state laminated ZABs prepared presetting air flow layer show specific capacity 818.8 mA h , 520 h, wide temperature‐adaptive from −40 60 °C. This work not only offers possibilities metal‐loading for exploring efficient SACs, provides strategies device structure design toward advanced ZABs.

Language: Английский

Citations

2