Identifying N Coordination Types of Single‐Atom Catalysts by Spin‐Modulated Luminol Cathodic Electrochemiluminescence DOI

Mengru Liu,

Mingxin Liu, Wenjie Chen

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 9, 2024

Abstract The type of coordinated N atoms in the metal‐N coordination structure is paramount importance to catalytic property N‐modified carbon‐based single‐atom catalysts (SACs). Extended X‐ray absorption fine (EXAFS) spectroscopy a powerful tool for analyzing environments SACs. Despite its efficacy, limited availability synchrotron light sources and complexity data analysis have constrained broader application identifying types within In this work, two kind CoN 4 SACs, were prepared by varying source. Then their electrochemiluminescence (ECL) behavior luminol/dissolved oxygen system during cathodic scanning investigated. comparison 4(pyridinic N) , which spin density displays d z2 orbital characteristics, 4(pyrrolic exhibits xz features, was more conducive subsequent cleavage O−O bond O 2 ⋅ − ⋅OH, resulting generation active intermediates *OH promotion ECL emission. This work demonstrates that technique provides novel method rapid identification Co−N nature metal center

Language: Английский

Unveiling the Dynamic Electrocatalytic Activity of Online Synthesized Bimetallic Nanocatalysts via Electrochemiluminescence Microscopy DOI
Jingwei Xue, Conghui Xu, Wei Zhao

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(15), P. 4665 - 4671

Published: April 8, 2024

Effective bimetallic nanoelectrocatalysis demands precise control of composition, structure, and understanding catalytic mechanisms. To address these challenges, we employ a two-in-one approach, integrating online synthesis with real-time imaging Au@Metal core–shell nanoparticles (Au@M NPs) via electrochemiluminescence microscopy (ECLM). Within 120 s, electrodeposition in situ activity screening alternate. ECLM captures transient faradaic processes during potential switches, visualizes electrochemical real-time, tracks dynamics at the single-particle level. Analysis using ECL photon flux density eliminates size effects yields quantitative electrocatalytic results. Notably, nonlinear trend corresponding to shell metal Au surface atomic ratio is discerned, quantifying optimal component Au@M NPs. This approach offers comprehensive behavior deposition process high spatiotemporal resolution, which crucial for tailoring efficient nanocatalysts diverse applications.

Language: Английский

Citations

10

Multifunctional spatial-potential resolved electrochemiluminescence biosensor for dual-channel simultaneous detection of hepatitis A virus and hepatitis C virus DNA DOI
Di Wu, Qianqian Cai, Jiajie Zhang

et al.

Sensors and Actuators B Chemical, Journal Year: 2024, Volume and Issue: 422, P. 136597 - 136597

Published: Sept. 10, 2024

Language: Английский

Citations

5

Identifying N Coordination Types of Single‐Atom Catalysts by Spin‐Modulated Luminol Cathodic Electrochemiluminescence DOI

Mengru Liu,

Mingxin Liu, Wen‐Jie Chen

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 9, 2024

The type of coordinated N atoms in the metal-N coordination structure is paramount importance to catalytic property N-modified carbon-based single-atom catalysts (SACs). Extended X-ray absorption fine (EXAFS) spectroscopy a powerful tool for analyzing environments SACs. Despite its efficacy, limited availability synchrotron light sources and complexity data analysis have constrained broader application identifying types within In this work, two kind CoN

Language: Английский

Citations

4

Super-Resolved Mapping of Electrochemical Reactivity in Single 3D Catalysts DOI
Jing‐Jing Zhang, Daixin Ye, Conghui Xu

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 27, 2025

Crystals with three-dimensional (3D) stereoscopic structures, characterized by diverse shapes, crystallographic planes, and morphologies, represent a significant advancement in catalysis. Differentiating quantifying the catalytic activity of specific surface facets sites at single-particle level is essential for understanding predicting performance. This study employs super-resolution radial fluctuations electrogenerated chemiluminescence microscopy (SRRF-ECLM) to achieve high-resolution mapping electrocatalytic on individual 3D Cu2O crystals, including cubic, octahedral, truncated octahedral structures. With spatial resolution below 100 nm, SRRF-ECLM precisely delineates contours enabling detailed analysis distribution across distinct interfaces. By quantitatively measuring ECL emission intensities from different planes joint interfaces, we constructed distributions, offering an intuitive comprehensive perspective single-catalyst activity. approach advances electrochemical provides valuable insights designing more efficient catalysts energy conversion chemical synthesis applications.

Language: Английский

Citations

0

Overcoming Kinetic Barriers of Remote Electrochemiluminescence on Boron-Doped Diamond via Catalytic Coreactant Oxidation DOI Creative Commons
Alessandro Fracassa, Chiara Mariani, Andrea Fiorani

et al.

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Using an Ir( iii )-based redox mediator ([Ir(sppy) 3 ] 3- ) overcomes the traditional kinetic barrier of tri- n -propylamine oxidation on BDD, enhancing ECL from Ru( ii )-labeled beads by up to 46-fold.

Language: Английский

Citations

0

Electrochemiluminescence immunosensor for the sensitive detection of the pancreatic neuroendocrine tumor biomarker chromogranin B based on graphdiyne quantum dots DOI

Yunfan Zhou,

Min Guo,

Yuanliang Li

et al.

Analytical Methods, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Construction of the sensitive label-free ECL immunosensor BSA/anti-CgB/GDY QDs@Au NPs/GCE and its application for detection pNET marker chromogranin B.

Language: Английский

Citations

0

Identifying In Situ Activity and Selectivity of Oxygen Reduction Catalysts at the Subparticle Level DOI

Yufei Yao,

Hongyang Qu,

Zehui Sun

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: May 6, 2025

Oxygen reduction reaction (ORR) plays a crucial role in both the chemical and energy industries. Despite substantial advancements theoretical, computational, experimental studies, identifying situ activity selectivity ORR electrocatalysis remains major challenge. Here, using suite of correlative operando scanning electrochemical probe electrochemiluminescence microscopy techniques, we establish link between morphological structure local single Au Au@Pt platelets at subparticle level. It is clearly shown that edge facets exhibit higher for 4e- compared to basal planes, whereas planes demonstrate superior 2e- relative facets. These findings deepen our understanding across different level, which offers valuable guidance rational design highly efficient electrocatalysts.

Language: Английский

Citations

0

Measuring and Regulating the Reaction Layer for Enhanced Electrochemiluminescence Analysis DOI
Ya-Feng Wang, Bin Su

ACS electrochemistry., Journal Year: 2025, Volume and Issue: unknown

Published: May 12, 2025

Language: Английский

Citations

0

An Efficient Luminol–H2O2 Electrochemiluminescence System with Porous Bimetallic Organic Gels as Signal Booster and Elaborate Heterosequence Aptamer as Recognition Component for Ultrasensitive Biosensing DOI
Zhe Tang, Kai Wen,

Yu-Zhuo Guo

et al.

Analytical Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: May 15, 2025

Herein, an efficient luminol-H2O2 electrochemiluminescence (ECL) system with bimetallic organic gels as ECL signal booster and innovative heterosequence aptamer recognition a target conversion strategy is used to construct sensitive specific aptasensor for the detection of β2-microglobulin (B2M), key biomarker end-stage renal disease (ESRD). Impressively, porous Fe@Cu (Fe@Cu MOGs) act coreaction accelerators confinement-enhanced reactors system, amplifying by 21-fold compared traditional which greatly enhanced sensitivity biosensor. Compared homosequence approach competitive binding aptamers single site, synergistic multiple sites could improve specificity aptasensor, validated experiments molecular docking simulations. Therefore, developed exhibits remarkable dynamic range 10 fg/mL-1 μg/mL ultralow limit 0.9 fg/mL, superior previously reported works. Additionally, demonstrated consistent performance conventional clinical immunoturbidimetric assays high B2M concentration in 14 samples, well exhibiting trace levels that are undetectable immunoturbidimetry. This offers accurate platform recognition, promising applications detection, diagnosis, therapeutic monitoring, advancing scientific research on early pathological changes discovery.

Language: Английский

Citations

0

Ternary Heterojunction ZnS‐ZnIn2S4‐In2S3 Efficiently Catalyzes Triethylamine to Enhance Electrochemiluminescence Imaging Signals DOI Open Access
Jingui Chen, Yue Jia, Huaiqing Zhao

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 20, 2024

Abstract The visualization of electrode reactions is significant for ultra sensitive detection. Traditional electrochemiluminescence (ECL) detection method can hardly visualize reactions. Combining ECL imaging technology and traditional methods overcome the lack visual feedback key information in sensor construction. In contrast to cyclic voltammetry testing, applying a constant voltage surface results more stable signal. this study, methionine‐stabilized gold nanoclusters (Met‐AuNCs) are used as efficient near‐infrared luminescent clusters, triethylamine (TEA) coreactants construct an acetamiprid (ACT). ternary heterojunction ZnS‐ZnIn 2 S 4 ‐In 3 (Z‐Z‐I) forms stepwise electron transfer mode, facilitating rapid generation free radicals TEA. Furthermore, Z‐Z‐I serves substrate, providing large loading area DNA chain, which lays foundation wide range. Such has linear range (100 f m 1 µ ) achieves low limit (42 fM) ACT This study not only provides accurate detecting agricultural products but also foretells promising application electrochemiluminescent sensors.

Language: Английский

Citations

3