Chemical Vapor Deposition of Pyridinic-Nitrogen-Dominated Graphene Model Electrocatalysts and in Situ Raman Spectroscopic Evidence on Their Active Sites for Oxygen Reduction Reaction DOI
Zejian Li, Wenting Cui,

Qinke Wu

и другие.

The Journal of Physical Chemistry C, Год журнала: 2024, Номер unknown

Опубликована: Дек. 2, 2024

Probing the reaction intermediates on electrocatalytic surface is crucial for understanding catalytically active sites and mechanisms. Although pyridinic nitrogen-doped carbon has been proposed as a highly site technologically important oxygen reduction (ORR) in fuel cells metal air batteries, direct situ spectroscopic evidence center (nitrogen or next to nitrogen) ORR pathways remain lacking. We report chemical vapor deposition of pyridinic-N-dominated nondoped graphene domains (GDs) well-defined model electrocatalysts. By using electrochemical Raman spectroscopy, we reveal that both N-dominated GDs generate common (*O2– *OOH) adsorbed atoms at edges those neighboring N, respectively, except higher intensities corresponding activities latter. Spatially resolved line profile spectroscopy further N more than in-plane containing graphitic N. This study provides general methodology establishing structure–activity relationships two-dimensional electrocatalysts (spatially resolved) spectroscopy.

Язык: Английский

Defect-repair in carbon for fast and stable potassium and sodium storage DOI
Rui Ma, Yaxin Chen, Binyuan Zhang

и другие.

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162509 - 162509

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0
Design principles of non-noble metal catalysts for high-performance rechargeable Zn-air batteries DOI
Pengxiang Liu, Yaqian Wang, Ruitao Lv

и другие.

Energy storage materials, Год журнала: 2025, Номер unknown, С. 104155 - 104155

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0
Efficient Electrochemical Ozone and Hydrogen Peroxide Production by Synergistic Effect of Atomically Dispersed Pt, Boron and Nitrogen Doped 2D Diamonds DOI Open Access
Mengmeng Lu, Xu Liu,

Changfei Jing

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Авг. 29, 2024

Abstract The electrochemical co‐synthesis of H₂O₂ and O₃ holds substantial potential for environmental sustainability energy conservation. However, synthesizing electrocatalysts with appropriate adsorption energies intermediates in the pairwise electrosynthesis remains a major challenge. In this study, boron nitrogen‐doped 2D diamonds (BND) atomically dispersed Pt₁/BND are systematically designed synthesized to facilitate two‐electron oxygen reduction reaction (2e⁻ ORR) ozone production (EOP), respectively. BND exhibit remarkable activity, achieving 90.7% selectivity attaining Faradaic efficiency (FE) 12.54% EOP. Pt monatomic species, loading 0.13%, predominantly distributed along edges Pt₁/BND. Theoretical calculations reveal that their superior properties primarily stem from phase transition graphene fractions at edges, which moderate modulate electronic structure through synergistic interactions between dopant elements. Additionally, favorable mass transfer properties. integration degradation organic contaminants sterilization further showcase practical utility electrocatalysts.

Язык: Английский

Процитировано

3
Electrocatalysis, diverse and forever young DOI
Tristan Asset, Alexandr G. Oshchepkov, Frédéric Maillard

и другие.

Electrochimica Acta, Год журнала: 2024, Номер unknown, С. 145174 - 145174

Опубликована: Сен. 1, 2024

Язык: Английский

Процитировано

3
Ice/salt assisted synthesis of ultrathin two-dimensional nitrogen doped carbon nanosheets for fast lithium storage DOI
Rui Ma, Qian Li,

Doudou Zhou

и другие.

Ceramics International, Год журнала: 2024, Номер 50(16), С. 28378 - 28385

Опубликована: Май 11, 2024

Язык: Английский

Процитировано

2
Regulation of heterogeneous electron transfer reactivity by defect engineering through electrochemically induced brominating addition DOI Creative Commons

Lanping Zeng,

Lianhuan Han,

Wenjing Nan

и другие.

Chemical Science, Год журнала: 2023, Номер 15(1), С. 95 - 101

Опубликована: Ноя. 9, 2023

Enhancing the electrochemical activity of graphene holds great significance for expanding its applications in various electrochemistry fields. In this study, we have demonstrated a facile and quantitative approach modulating defect density single-layer (SLG) via an electrochemically induced bromination process facilitated by cyclic voltammetry. This controlled engineering directly impacts heterogeneous electron transfer (HET) rate SLG. By utilizing Raman spectroscopy scanning microscopy (SECM), established correlation between HET kinetics both (nD) mean distance defects (LD) The variation (k0) with manifested distinctive three-stage behavior. Initially, k0 increased slightly increasing nD, then it experienced rapid increase as nD further increased. However, once surpassed critical value about 1.8 × 1012 cm-2 (LD < 4.2 nm), decreased rapidly. Notably, results revealed remarkable 35-fold enhancement under optimal conditions compared to pristine research paves way controllable powerful strategy enhance graphene, opening up new possibilities utilization wide range applications.

Язык: Английский

Процитировано

6
DFT-assisted low-dimensional carbon-based electrocatalysts design and mechanism study: a review DOI Creative Commons
Yun Han,

Hongzhe Xu,

Qin Li

и другие.

Frontiers in Chemistry, Год журнала: 2023, Номер 11

Опубликована: Окт. 17, 2023

Low-dimensional carbon-based (LDC) materials have attracted extensive research attention in electrocatalysis because of their unique advantages such as structural diversity, low cost, and chemical tolerance. They been widely used a broad range electrochemical reactions to relieve environmental pollution energy crisis. Typical examples include hydrogen evolution reaction (HER), oxygen (OER), reduction (ORR), carbon dioxide (CO 2 RR), nitrogen (NRR). Traditional “trial error” strategies greatly slowed down the rational design electrocatalysts for these important applications. Recent studies show that combination density functional theory (DFT) calculations experimental is capable accurately predicting structures electrocatalysts, thus revealing catalytic mechanisms. Herein, current well-recognized collaboration methods practice are reviewed. The commonly calculation basic functionals briefly summarized. Special paid descriptors accepted bridge linking structure activity breakthroughs high-volume accurate prediction electrocatalysts. Importantly, correlated multiple systematically describe complicated interfacial electrocatalytic processes LDC catalysts. Furthermore, machine learning high-throughput simulations crucial assisting discovery new This review will guide further development extended applications from aspect DFT computations.

Язык: Английский

Процитировано

5
Graphitic Carbocatalysts with Pentagon Defects Synthesized from Polyperylene for Electrocatalytic Oxygen Reduction and Flexible Zinc-Air Batteries DOI

Xiaofeng Mou,

Qi Yang, Bin Zhao

и другие.

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(12), С. 14526 - 14539

Опубликована: Июнь 14, 2024

Carbocatalysts have been widely explored in renewable energy systems, such as fuel cells and metal-air batteries, their performance critically hinges upon the intricate balance between graphitic defective structures. However, achieving this harmony while preserving high graphitization levels is still a formidable challenge. Herein, an innovative graphitic/defective heteroatom-free carbon nanosheet (GDHfCN) developed through dual molten salt chemical treatment of polyperylene, which uniquely marries high-density structures with abundant pentagon defects. The GDHfCN demonstrates exceptional electrocatalytic for oxygen reduction reaction (ORR), half-wave potential 0.891 V, low Tafel slope 52.1 mV dec–1, kinetic current density up to 106.42 mA cm–2. This nanoscale configuration outperforms catalysts typically synthesized sole treatment, limited by focus on either or Moreover, application flexible zinc-air battery confirms its practical potential, exhibiting remarkable stability under bending tests. study not only illustrates carbocatalysts but also advances field electrocatalysis, marking significant stride development high-performance devices.

Язык: Английский

Процитировано

1
Enhanced ORR Activity of Carbon Defects via Substituent-modulated Electronic Perturbation DOI
Yun Han, Xin Mao, Xuecheng Yan

и другие.

Chemical Communications, Год журнала: 2024, Номер 60(96), С. 14216 - 14219

Опубликована: Янв. 1, 2024

Fine-tuning of the p z orbital carbon defects by ligand-modulated electronic perturbation can lead to peak ORR catalytic activity.

Язык: Английский

Процитировано

1
Carbon‐Based Materials for Electrocatalytic Hydrogen Evolution Reaction DOI
Zhenning Wang,

Sundus Umer,

Hao Lu

и другие.

Опубликована: Дек. 13, 2024

Traditional hydrogen evolution reaction (HER) catalysts are generally noble metals, but their application is limited due to high cost and poor stability. Through research, carbon-based have also shown good HER performance. These advantages such as low stability, making them a potential alternative traditional metal catalysts. This chapter focuses on series of well-performing catalysts, porous carbons, low-dimensional carbon materials, metal–organic framework (MOF) atomic doping materials applications, catalytic mechanisms in HER. The strategies improve activity discussed, including increasing specific surface area, with heteroatoms, preparing composite materials. It hoped that these methods material synthesis will be helpful inspire readers engage the field

Язык: Английский

Процитировано

0