In Situ Electron Tomography Insights into the Curvature Effect of a Concave Surface on Fe Single Atoms for Durable Oxygen Reaction DOI Creative Commons

Jun‐Kang Li,

Haobo Zhao,

Yang Zhang

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 16, 2024

Curvature-induced interfacial electric field effects and local strain engineering offer a powerful approach for optimizing the intrinsic catalytic activity of single-atom catalysts (SACs). Investigations into surface curvature on SACs are still ongoing, impact concave is often overlooked. In this work, theoretical calculations indicate that curved surfaces, particularly those with concavity, can optimize electronic structures single Fe sites facilitate reductive release *OH. A carbon sphere featuring uniformly oriented channels chiral multi-shelled hollow nanosphere selected as matrices due to their accessible and/or convex surfaces. After loading species, resulting SA in surfaces exhibit excellent oxygen reduction reaction (E

Language: Английский

Promoting Efficient Ruthenium Sites With Lewis Acid Oxide for the Accelerated Hydrogen and Chlor‐Alkali Co‐Production DOI Open Access

Xiumin Gu,

Zijian Li, Haeseong Jang

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 21, 2025

Abstract Ruthenium (Ru) –based catalysts have been considered a promising candidate for efficient sustainable hydrogen and chlor‐alkali co‐production. Theoretical calculations disclosed that the hollow sites on Ru surface strong adsorption energies of H Cl species, which inevitably leads to poor activity cathodic evolution reaction (HER) anodic chlorine (CER), respectively. Furthermore, it confirmed anchoring Lewis acid oxide nanoparticles such as MgO can induce formation onion‐like charge distribution atoms around nanoparticles, thereby exposing Ru‐bridge at interface excellent accelerate both HER CER. Under guidance theoretical calculations, novel dispersed (MgO x ‐Ru) electrocatalyst is successfully prepared. In strongly alkaline saline media, ‐Ru recorded CER electrocatalytic with very low overpotential 19 mV 74 current density 10 mA cm −2 , More stirringly, electrochemical test electrodes under simulated electrolysis conditions demonstrated superior performance industrial commercial 20 wt% Pt/C dimensionally stable anode (DSA).

Language: Английский

Citations

0
Biological Neural Network‐Inspired Micro/Nano‐Fibrous Carbon Aerogel for Coupling Fe Atomic Clusters With Fe‐N4 Single Atoms to Enhance Oxygen Reduction Reaction DOI Open Access
Jiaojiao Sun, Mengxia Shen,

A. Jun Chang

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

Nitrogen-coordinated metal single atoms catalysts, especially with M-N4 configuration confined within the carbon matrix, emerge as a frontier of electrocatalytic research for enhancing sluggish kinetics oxygen reduction reaction (ORR). Nevertheless, due to highly planar D4h symmetry in M-N4, their adsorption behavior toward intermediates is limited, undesirably elevating energy barriers associated ORR. Moreover, structural engineering substrate also poses significant challenges. Herein, inspired by biological neural network (BNN), reticular nervous system high-speed signal processing and transmitting, comprehensive biomimetic strategy proposed tailoring Fe-N4 (Fe SAs) coupled Fe atomic clusters ACs) active sites, which are anchored onto chitosan microfibers/nanofibers-based aerogel (CMNCA-FeSA+AC) continuous conductive channels an oriented porous architecture. Theoretical analysis reveals synergistic effect SAs ACs optimizing electronic structures expediting The ingenious will shed light on topology optimization efficient electrocatalysts advanced electrochemical conversion devices.

Language: Английский

Citations

0
A pH universal ORR catalyst with core-shell ZIF-derived binary cobalt/iron sites for Zn-air batteries DOI

Yanou Qi,

Weijun Shan,

Haibiao Yu

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161543 - 161543

Published: March 1, 2025

Language: Английский

Citations

0
Single‐Atom Co Meets Remote Fe for a Synergistic Boost in Oxygen Electrocatalysis DOI Creative Commons
Zongge Li, Wenjun Kang, Jingkai Lin

et al.

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

Published: March 16, 2025

Abstract The oxygen electrocatalytic activity of transition metal catalysts can be tuned by tailoring their microstructure to optimize electronic configuration. Here, a one‐step Coordination‐Selective Synthesis strategy is developed integrate Co single‐atom sites and Fe‐based nanoparticles within the same matrix, enabling long‐range interactions that enhance Co‐N 4 reactivity improve reduction reaction performance. X‐ray absorption spectroscopy confirmed remote modulate electron distribution at sites. Structural characterizations reveal optimal catalyst, 50% Fe ‐NC, contains metallic Fe, 3 O , N species. Electrochemical measurements show it achieves onset half‐wave potentials 0.984 0.927 V versus RHE, surpassing 100% ‐NC with only Additionally, demonstrates efficient evolution performance, achieving an overpotential 298 mV 20 mA cm −2 comparable RuO 2 . Density functional theory calculations optimizes O‐containing intermediate adsorption/desorption, lowering theoretical overpotential. Zn‐air batteries assembled exhibited superior performance Pt/C, highlighting its potential for bifunctional electrocatalysis. This study provides approach designing high‐performance utilizing synergistic between atomic nanoscale

Language: Английский

Citations

0
Conjugated Cobalt Porphyrin Polymer for Highly Active and Selective Electrocatalytic Nitrite Reduction to Ammonia DOI
Lisi Xie,

Benxing Mei,

Yabo Wang

et al.

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

Published: April 15, 2025

Abstract Electrocatalytic nitrite (NO 2 − ) reduction RR) to ammonia (NH 3 is a promising green technology for producing NH with high efficiency. Cobalt macrocyclic complexes have attracted great interest because of their ability selectively convert NO , but suffer from low yields. Herein, cobalt porphyrin conjugated polymer on carbon nanotubes (CoPCOP@CNT) reported display exceptional RR performance large yield 133.39 mg h −1 CoP at −1.0 V and Faradaic efficiency (FE) 98.0% −0.8 V. Utilizing CoPCOP@CNT as the catalyst cathode, Zn‐NO battery exhibits remarkable power density (5.34 mW cm −2 ), open‐circuit voltage (≈1.45 V), FE (94.6%), (29.15 ). The active intermediates reaction pathways CoPCOP in process are revealed by differential electrochemical mass spectroscopy theory calculations. This work highlights potential electrocatalysts based metal porphyrins conversion nitrogenous pollutant into .

Language: Английский

Citations

0
Molecular assembly synthesis of microporous FeN4-doped carbon plates implanted with Fe3C-doped graphitized carbon nanobelts for efficient oxygen reduction DOI

Feiyan Feng,

Zeyu Hu,

Jiani Gu

et al.

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 163332 - 163332

Published: April 1, 2025

Language: Английский

Citations

0
Atomically dispersed cobalt sites on nitrogen-doped hollow carbon spheres as efficient electrocatalysts for high performance lithium-sulfur batteries DOI

Xunli Guo,

Mingzhi Yang, Jingyao Hou

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162955 - 162955

Published: April 1, 2025

Language: Английский

Citations

0
Asymmetrically tailored catalysts towards electrochemical energy conversion with non-precious materials DOI Creative Commons
Lei Zhang,

Qiaoling Xu,

Lu Xia

et al.

Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Asymmetric transition metal catalysts offer a path to energy devices such as water electrolysis and metal–air batteries based on non-precious metals. This work reviews strategies for their design, reaction mechanisms, future challenges.

Language: Английский

Citations

0
Honeycomb-Like Single-Atom Catalysts with FeN3Cl Sites for High-Performance Oxygen Reduction DOI Creative Commons
Jinfeng Xu, Yu Meng, Xiaoyi Qiu

et al.

Advanced Powder Materials, Journal Year: 2025, Volume and Issue: unknown, P. 100298 - 100298

Published: April 1, 2025

Language: Английский

Citations

0
In Situ Electron Tomography Insights into the Curvature Effect of a Concave Surface on Fe Single Atoms for Durable Oxygen Reaction DOI Creative Commons

Jun‐Kang Li,

Haobo Zhao,

Yang Zhang

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 16, 2024

Curvature-induced interfacial electric field effects and local strain engineering offer a powerful approach for optimizing the intrinsic catalytic activity of single-atom catalysts (SACs). Investigations into surface curvature on SACs are still ongoing, impact concave is often overlooked. In this work, theoretical calculations indicate that curved surfaces, particularly those with concavity, can optimize electronic structures single Fe sites facilitate reductive release *OH. A carbon sphere featuring uniformly oriented channels chiral multi-shelled hollow nanosphere selected as matrices due to their accessible and/or convex surfaces. After loading species, resulting SA in surfaces exhibit excellent oxygen reduction reaction (E

Language: Английский

Citations

0