Carbon最新文献 - Book学术

Well-designed polymer-grafted and heteroatom co-doped carbon nitride quantum dots: Towards efficient friction-reduction and anti-wear additives 设计良好的聚合物接枝和杂原子共掺杂氮化碳量子点：迈向高效减摩和抗磨添加剂

IF 11.6 2区材料科学

Carbon Pub Date : 2025-10-24 DOI: 10.1016/j.carbon.2025.120973

Yi Wang , Weiwei Tang , Xian Wei , Hao Lei , Haidong Liu , Wei Gao , Zhe Zhang , Yufeng Li

{"title":"Well-designed polymer-grafted and heteroatom co-doped carbon nitride quantum dots: Towards efficient friction-reduction and anti-wear additives","authors":"Yi Wang , Weiwei Tang , Xian Wei , Hao Lei , Haidong Liu , Wei Gao , Zhe Zhang , Yufeng Li","doi":"10.1016/j.carbon.2025.120973","DOIUrl":"10.1016/j.carbon.2025.120973","url":null,"abstract":"<div><div>Water-based lubricants are rising rapidly again in lubrication owing to their eco-friendly, low-cost, and extensive source in the context of escalating global energy crises and environmental degradation. Nevertheless, the weak anti-reduction and anti-wear behaviors of water-based lubricants have emerged as the critical bottlenecks restricting their development. Consequently, the new-type polyacrylic acid (PAA)-grafted carbon nitride quantum dots (X-CNQDs-PAAn) with co-doping by B and P were first synthesized and directly applied as additives in water-based lubricants (X representing the doped atoms of B and P; n representing the molecular weight of PAA was 2000, 3000, and 5000). The surface and core dual-designed X-CNQDs-PAAn could remarkably promote the lubricity of the base liquid; among them, B,P-CNQDs-PAA2000 exhibited the best efficacy. Specifically, adding 1.5 wt% of B,P-CNQDs-PAA2000, the friction-reduction and anti-wear performances of the base liquid can be maximally increased by 48.04 % and 85.3 %, respectively. Experimental results demonstrated that the grafted PAA groups and co-doped B and P have a pronounced effect on enhancing the tribological behaviors of CNQDs-based additives. Additionally, B,P-CNQDs-PAA2000 still possessed good tribological performances under harsh operational conditions such as high-load and long duration. The outstanding tribological behaviors of B,P-CNQDs-PAA2000 are mainly attributed to they could form a thick and tight tribo-film on the frictional interfaces. Noteworthily, the embedded B,P-CNQDs-PAA2000 in the tribo-film played a significant role in improving its strength and thickness.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"247 ","pages":"Article 120973"},"PeriodicalIF":11.6,"publicationDate":"2025-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145360457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimized wood-based activated charcoal for desulfurization under realistic biogas conditions 优化木质活性炭在真实沼气条件下的脱硫效果

IF 11.6 2区材料科学

Carbon Pub Date : 2025-10-22 DOI: 10.1016/j.carbon.2025.120963

Luis Paz , Taher Selmi , Vanessa Fierro , Alain Celzard

{"title":"Optimized wood-based activated charcoal for desulfurization under realistic biogas conditions","authors":"Luis Paz , Taher Selmi , Vanessa Fierro , Alain Celzard","doi":"10.1016/j.carbon.2025.120963","DOIUrl":"10.1016/j.carbon.2025.120963","url":null,"abstract":"<div><div>This study focuses on the development of a high-performance activated carbon (AC) derived from wood-based charcoal for biogas desulfurization. ACs were densified with eco-friendly binders (cane molasses, beet molasses and plant polyphenols) and impregnated with KI, K<sub>2</sub>CO<sub>3</sub>, NaOH and KOH at loadings of 5–15 wt%. Both processes enhanced H<sub>2</sub>S separation capacity, evaluated through dynamic adsorption tests using a gas mixture composed of N<sub>2</sub>, CO<sub>2</sub>, O<sub>2</sub> and H<sub>2</sub>S, simulating realistic biogas conditions. The best-performing sorbent, AC densified with polyphenol-based binder and impregnated with 10 wt% KOH, was compared to commercial ACs used for biogas desulfurization under identical testing conditions. The developed AC achieved a high H<sub>2</sub>S separation capacity of 181 mg g<sup>−1</sup> and a competitive volumetric performance of 96 mg cm<sup>−3</sup>, demonstrating strong potential for industrial application. A 1D model for simulating breakthrough curves was developed and validated, using densified AC with CO<sub>2</sub> and O<sub>2</sub> in the feed gas. The model provides accurate predictions and mass transfer coefficients, supporting process design and material optimization. Thermal regeneration at 500 °C under N<sub>2</sub> allowed approximately 50 % of the initial performance to be recovered indicating the need for improved regeneration strategies. The results demonstrate the potential of sustainable, wood-derived AC as a competitive sorbent for industrial biogas purification.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"247 ","pages":"Article 120963"},"PeriodicalIF":11.6,"publicationDate":"2025-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145340206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lightweight carbonyl iron powder-based yolk-shell architectures for integrated electromagnetic wave absorption and thermal protection 用于集成电磁波吸收和热保护的轻质羰基铁粉为基础的蛋黄壳结构

IF 11.6 2区材料科学

Carbon Pub Date : 2025-10-21 DOI: 10.1016/j.carbon.2025.120959

Yun-peng Li , Ji-xing Bai , Hao-jie Zhang , Lu-yang Li , Xiu-Lan Wang , Li-hong Gao , Zhuang Ma , Qi Cao , Miao Jiang

{"title":"Lightweight carbonyl iron powder-based yolk-shell architectures for integrated electromagnetic wave absorption and thermal protection","authors":"Yun-peng Li , Ji-xing Bai , Hao-jie Zhang , Lu-yang Li , Xiu-Lan Wang , Li-hong Gao , Zhuang Ma , Qi Cao , Miao Jiang","doi":"10.1016/j.carbon.2025.120959","DOIUrl":"10.1016/j.carbon.2025.120959","url":null,"abstract":"<div><div>The rapid development of 5G mobile communication and the increasing integration density of electronic devices pose serious challenges to electromagnetic interference control. Carbonyl iron powder (CIP), a widely used magnetic absorber, suffers from high density, limited oxidation resistance, and a narrow effective absorption bandwidth (EAB) under low filler content (60 wt%). In this work, a CIP-based yolk-shell composite structure (CIP@C@Void@ZrO<sub>2</sub>) is designed using a sol-gel-hydrothermal-etching approach, which enables a dielectric architecture with multiple heterogeneous interfaces. The resulting material achieves a minimum reflection loss (<em>RL</em><sub>min</sub>) of −51.74 dB at a thickness of 1.8 mm, an EAB<sub>max</sub> of 7.76 GHz (9.8–17.56 GHz) at a thickness of 2 mm, and a 41.98 % reduction in true density compared to pristine CIP. The enhanced absorption performance is attributed to multiple mechanisms, including internal cavity-induced reflection and magnetic coupling, interfacial and dipolar polarization, and Fe<sup>2+</sup>/Fe<sup>3+</sup> hopping-enhanced conduction and polarization loss. The ceramic shell further enhances the thermal stability, increasing the oxidation resistance threshold to 325 °C and reducing the surface temperature rise by 53 % under a 217 °C heat source. This work presents a promising strategy for developing multifunctional materials combining broadband electromagnetic wave (EMW) absorption and thermal protection.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120959"},"PeriodicalIF":11.6,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145358814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-situ growth of mycelium-bamboo heterogeneous interfaces: Biofabricated porous carbon for efficient electromagnetic interference shielding and Joule heating 菌丝-竹非均相界面的原位生长：用于高效电磁干扰屏蔽和焦耳加热的生物制备多孔碳

IF 11.6 2区材料科学

Carbon Pub Date : 2025-10-21 DOI: 10.1016/j.carbon.2025.120960

Chenchen Wang , Zijie Zhong , Chuanshuang Hu , Junda Yang , Jiangtao Xu , Xiwei Xu , Jiayi Zhong , Weiwei Zhang , Xiuyi Lin

{"title":"In-situ growth of mycelium-bamboo heterogeneous interfaces: Biofabricated porous carbon for efficient electromagnetic interference shielding and Joule heating","authors":"Chenchen Wang , Zijie Zhong , Chuanshuang Hu , Junda Yang , Jiangtao Xu , Xiwei Xu , Jiayi Zhong , Weiwei Zhang , Xiuyi Lin","doi":"10.1016/j.carbon.2025.120960","DOIUrl":"10.1016/j.carbon.2025.120960","url":null,"abstract":"<div><div>Electric vehicle (EV) compartments are challenged by both the risk of high-power system electromagnetic wave (EMW) exposure and the need for efficient thermal management. To address this, biofabricated porous carbon derived from renewable biomass bamboo and <em>Ganoderma sessile</em> fungi was synthesized via an energy-efficient, solvent-free biological process for multifunctional electromagnetic interference (EMI) shielding and seat heating. The strategy utilized <em>in-situ</em> mycelial growth within bamboo substrates followed by carbonization, eliminating fossil-derived conductive fillers and associated dispersion issues. By controlling mycelial growth time (0–20 days), the heterogeneous interfaces and pore architecture of the MBCs were dynamically regulated. The optimized MBCs demonstrated enhanced interfacial polarization and conductive loss, resulting in a 76.5% improvement in absorption effectiveness (SE<sub>A</sub>) compared to pristine BC. The total shielding effectiveness reached 45.12 dB, representing a 47.5% enhancement over pristine BC, offering improved protection against cabin EMWs. In addition, the optimized interconnecting conductive network allows for excellent electro-thermal performance, with saturation temperatures of up to 137.8 °C at a low applied voltage of 2.0 V. This demonstrates significant potential for developing energy-efficient, responsive seat heating in EVs. This biomass-derived, solvent-free approach provides a sustainable pathway for developing energy-efficient EV cabin materials with dual EMI protection and thermal management capabilities.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120960"},"PeriodicalIF":11.6,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145358813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural and surface-modified freestanding carbon nanofiber hosts for high-performance lithium-metal batteries 用于高性能锂金属电池的结构和表面改性独立式碳纳米纤维主机

IF 11.6 2区材料科学

Carbon Pub Date : 2025-10-21 DOI: 10.1016/j.carbon.2025.120940

Noeul Kim , Jae Sol Sim , Jae Hun Choi , Jung-Kul Lee , Yun Chan Kang

{"title":"Structural and surface-modified freestanding carbon nanofiber hosts for high-performance lithium-metal batteries","authors":"Noeul Kim , Jae Sol Sim , Jae Hun Choi , Jung-Kul Lee , Yun Chan Kang","doi":"10.1016/j.carbon.2025.120940","DOIUrl":"10.1016/j.carbon.2025.120940","url":null,"abstract":"<div><div>The commercialization of Li-metal batteries is limited by uncontrolled Li dendrite growth, causing short circuits and capacity degradation. Carbon nanofibers (CNFs) have been explored as 3D Li-metal hosts to reduce local current density, but their intrinsic lithiophobicity hinders uniform Li deposition. Herein, we report a freestanding 3D CNF scaffold decorated with ZnO and coated with SnO<sub>2</sub> via electrospinning and e-beam evaporation. The embedded ZnO particles serve as lithiophilic nucleation sites, guiding uniform Li plating throughout the structure. Meanwhile, the SnO<sub>2</sub> surface layer undergoes lithiation to form Li–Sn alloy and Li<sub>2</sub>O, which enhance interfacial charge transfer and suppress dendrite formation. Notably, the SnO<sub>2</sub> coating induces a vertical electronic conductivity gradient across the scaffold, mitigating top-surface Li deposition and promoting stable, internal plating. Benefiting from this structural and gradient surface modification, the engineered electrode achieves a Coulombic efficiency of 97 % over 260 cycles at 1.0 mA cm<sup>−2</sup>. At a high Li loading of 5.0 mAh cm<sup>−2</sup>, the symmetric cell maintains a low overpotential (<30 mV) for over 900 h. A full cell coupled with LiFePO<sub>4</sub> delivers excellent cycling stability with 91.2 % capacity retention after 180 cycles at 1.0C. This strategy offers a promising route for safe, high-performance Li-metal batteries.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"247 ","pages":"Article 120940"},"PeriodicalIF":11.6,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145360458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Co single-atom catalysts with asymmetric structures via coordination and nano-restricted domain strategies for efficient photothermal production of H2O2 基于配位和纳米限制域策略的非对称结构Co单原子催化剂的光热高效制备H2O2

IF 11.6 2区材料科学

Carbon Pub Date : 2025-10-20 DOI: 10.1016/j.carbon.2025.120956

Xiaowei Chen, Shoucheng He, Ke Wang, Xinguo Xi, Xing Liu

{"title":"Development of Co single-atom catalysts with asymmetric structures via coordination and nano-restricted domain strategies for efficient photothermal production of H2O2","authors":"Xiaowei Chen, Shoucheng He, Ke Wang, Xinguo Xi, Xing Liu","doi":"10.1016/j.carbon.2025.120956","DOIUrl":"10.1016/j.carbon.2025.120956","url":null,"abstract":"<div><div>Obtaining hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) with high chemical value by photothermal catalysis is a green and sustainable ideal strategy. Herein, Co single-atom loaded S-doped graphitic phase carbon nitride (Co<sub>SA</sub>/SCN) with high photothermal catalytic activity for the preparation of H<sub>2</sub>O<sub>2</sub> was prepared by a strategy of self-assembled coordination and nano-restricted domain effect. Experimental and theoretical characterizations show that Co single atoms are able to form asymmetric Co–N<sub>3</sub>S<sub>1</sub> ionic bonds with S/N, which can effectively modulate the microenvironment on the SCN surface. Notably, the adsorption of O<sub>2</sub> on isolated Co atom sites is end-to-end, which promotes the formation of Co-μ-peroxide (Co–OOH) and effectively reduces O–O bond breakage, providing a highly selective 2e<sup>−</sup> ORR pathway for H<sub>2</sub>O<sub>2</sub> production. Under visible and solar irradiation, the H<sub>2</sub>O<sub>2</sub> generation rates of Co<sub>SA</sub>/SCN reached 506.1 μmol L<sup>−1</sup> h<sup>−1</sup> and 552.6 μmol L<sup>−1</sup> h<sup>−1</sup>, respectively, which were 25.8 and 20.2 times higher than pristine g-CN. Femtosecond transient absorption spectroscopy (fs-TA) and theoretical calculations show that the presence of Co single atoms reduces the free energy of ∗OOH generation and enhances the ultrafast kinetic and thermodynamic processes of proton coupling and electron-hole transfer. This study introduces a new single-atom synthesis method and serves as a guide for the synthesis of catalysts with efficient photothermal catalytic H<sub>2</sub>O<sub>2</sub> production activity.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"247 ","pages":"Article 120956"},"PeriodicalIF":11.6,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145340208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and application of ratiometric room temperature phosphorescent probes based on triplet-singlet Fӧrster resonance energy transfer mechanism between silica-coated phosphorescent carbon dots and rhodamine 6G 基于三重单线态Fӧrster硅包覆磷光碳点与罗丹明6G共振能量传递机制的比例室温磷光探针设计与应用

IF 11.6 2区材料科学

Carbon Pub Date : 2025-10-20 DOI: 10.1016/j.carbon.2025.120954

Yuxin Zheng , Kamile Arkin , Yuting Xu , Xue Jiang , Ning Xu , Qingkun Shang

{"title":"Design and application of ratiometric room temperature phosphorescent probes based on triplet-singlet Fӧrster resonance energy transfer mechanism between silica-coated phosphorescent carbon dots and rhodamine 6G","authors":"Yuxin Zheng , Kamile Arkin , Yuting Xu , Xue Jiang , Ning Xu , Qingkun Shang","doi":"10.1016/j.carbon.2025.120954","DOIUrl":"10.1016/j.carbon.2025.120954","url":null,"abstract":"<div><div>In this paper, we successfully designed and constructed a ratiometric room temperature phosphorescent probe (CDs@SiO<sub>2</sub>–Rh6G) that can realize highly sensitive detection of nitrite in urine under the interference of ascorbic acid (AA) based on the triplet-to-singlet Fӧrster resonance energy transfer mechanism between silica-coated phosphorescent carbon dots and rhodamine 6G. This unique energy transfer mechanism is discussed in detail, and the interference of various factors on nitrite detection is systematically investigated. With the successful masking of AA by 4-hydroxy-2,2,6,6-tetramethylpiperidinooxy (4-OH-TEMPO), CDs@SiO<sub>2</sub>–Rh6G could accurately detect NO<sub>2</sub><sup>−</sup> with a limit of detection (LOD) as low as 0.242 μmol/L, which is much lower than that of the commercially available urinary nitrite test paper. The probe was tested on real urine samples—human, dog, and cat urine—and the results were highly consistent with those obtained by ion chromatography, with spike recoveries ranging from 96.5 % to 105.3 %. Since the green and yellow luminescence of the probe is visible to the naked eye, a visual analysis method based on the RGB values of smartphones was developed. This study presents a new strategy for constructing ratiometric room temperature phosphorescent probes based on a unique TS-FRET mechanism. Meanwhile, this research not only overcomes the quantitative limitations of current test strip detection methods but also lays the foundation for developing more sensitive and accurate clinical diagnostic tools for urinary tract infections.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"247 ","pages":"Article 120954"},"PeriodicalIF":11.6,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145340209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of chitosan/MIL-88A derived nitrogen-doped carbon/ferroferric oxide/carbon composite aerogels for electromagnetic wave absorption and thermal insulation 壳聚糖/MIL-88A衍生氮掺杂碳/氧化铁/碳复合电磁波吸收和隔热气凝胶的制备

IF 11.6 2区材料科学

Carbon Pub Date : 2025-10-20 DOI: 10.1016/j.carbon.2025.120957

Xin Ding , Xiaoqing Zhao , Jinxin Zhang , Bin Wang , Konghu Tian , Ruiwen Shu

{"title":"Fabrication of chitosan/MIL-88A derived nitrogen-doped carbon/ferroferric oxide/carbon composite aerogels for electromagnetic wave absorption and thermal insulation","authors":"Xin Ding , Xiaoqing Zhao , Jinxin Zhang , Bin Wang , Konghu Tian , Ruiwen Shu","doi":"10.1016/j.carbon.2025.120957","DOIUrl":"10.1016/j.carbon.2025.120957","url":null,"abstract":"<div><div>Biological carbon-based electromagnetic wave (EMW) absorbers have attracted much attention due to their abundant resources and environmental friendliness. However, their impedance mismatch and single attenuation mechanism pose severe challenges to achieving efficient EMW absorption performance. In this work, chitosan/MIL-88A derived nitrogen-doped carbon/ferroferric oxide/carbon (NC/Fe<sub>3</sub>O<sub>4</sub>/C) composite aerogels were prepared by a three-step method of hydrothermal reaction, freeze-drying and high-temperature carbonization. The results revealed that the three-dimensional porous network structure and the rich heterointerfaces were conducive to enhancing interfacial polarization and optimizing impedance matching. Furthermore, the synergistic effect of dielectric loss and magnetic loss enabled the NC/Fe<sub>3</sub>O<sub>4</sub>/C composite aerogel with excellent EMW absorption performance at the carbonization temperature of 700 °C and a filling ratio of 17 wt%. When the thickness was 2.94 mm, the minimum reflection loss was −70.91 dB. After optimizing the thickness to 2.8 mm, the maximum effective absorption bandwidth could reach 7 GHz, surpassing that of most reported biological carbon-based EMW absorbers. Additionally, the prepared NC/Fe<sub>3</sub>O<sub>4</sub>/C composite aerogel also exhibited good thermal insulation property. The research results of radar cross section simulation manifested that the obtained composite aerogels possessed excellent radar wave dissipation capability. This study provides innovative insights, aiming to promote the development of biological carbon-based multifunctional EMW absorbers.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120957"},"PeriodicalIF":11.6,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145358885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rational design of Co3O4–CNT–N-doped carbon system for superior OER: Bridging in situ/ex situ studies with DFT co3o4 - cnt - n掺杂碳体系的合理设计：用DFT桥接原位/非原位研究

IF 11.6 2区材料科学

Carbon Pub Date : 2025-10-20 DOI: 10.1016/j.carbon.2025.120942

Anna G. Rojek , Rustem Zairov , Renat Nazmutdinov , Ewa Mijowska

{"title":"Rational design of Co3O4–CNT–N-doped carbon system for superior OER: Bridging in situ/ex situ studies with DFT","authors":"Anna G. Rojek , Rustem Zairov , Renat Nazmutdinov , Ewa Mijowska","doi":"10.1016/j.carbon.2025.120942","DOIUrl":"10.1016/j.carbon.2025.120942","url":null,"abstract":"<div><div>This paper reveals that the controlled strategy of high-temperature carbonization of ZIF-67 is a facile route to deliver active species boosting oxygen evolution reaction (OER) performance. The optimized sample (treated at 750 °C) is composed of a nitrogen-doped carbon matrix with embedded metallic Co nanoparticles with Co<sub>3</sub>O<sub>4</sub> islets and decorated by carbon nanotubes (CNT). Among them, Co<sub>3</sub>O<sub>4</sub> islets significantly promote oxygen evolution. Their enhanced activity is explained via density-functional theory (DFT) calculations describing the reaction mechanism involving two different active sites of islets. The experimental results demonstrate an overpotential of 288 mV, a Tafel slope of 69 mV/dec, and a potential retention of 97.2 % after a 100h test at 50 mA/cm<sup>2</sup>. Systematic microscopic, in situ & <em>ex-situ</em> spectroscopic (Raman), and theoretical studies allowed us to unveil the intermediates responsible for the promotion of electroactivity. The theoretical model predicts the predominant catalytic activity of terminal O atoms (Ot) at the Co<sub>3</sub>O<sub>4</sub> surface. These results offer a promising \"proof of concept\" for developing more efficient zeolitic imidazole framework (ZIF)-based electrocatalysts.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120942"},"PeriodicalIF":11.6,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145358891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Zinc-assisted synthesis of edge‐enriched N‐doped porous carbon nanosheets from g-C3N4 for high-performance potassium-ion storage 锌辅助g-C3N4制备富边氮掺杂多孔碳纳米片用于高性能钾离子存储

IF 11.6 2区材料科学

Carbon Pub Date : 2025-10-19 DOI: 10.1016/j.carbon.2025.120945

Feng Hua , Hong-bo Huang , Cai-ling Liu , Ting-ting Liu , Yi-yi Fang , Chen-xu Chen , Shao-hua Luo , Mei-lan Xie , Dui Ma , Fan-yan Zeng , Xiao Liang

{"title":"Zinc-assisted synthesis of edge‐enriched N‐doped porous carbon nanosheets from g-C3N4 for high-performance potassium-ion storage","authors":"Feng Hua , Hong-bo Huang , Cai-ling Liu , Ting-ting Liu , Yi-yi Fang , Chen-xu Chen , Shao-hua Luo , Mei-lan Xie , Dui Ma , Fan-yan Zeng , Xiao Liang","doi":"10.1016/j.carbon.2025.120945","DOIUrl":"10.1016/j.carbon.2025.120945","url":null,"abstract":"<div><div>Potassium, owing to its natural abundance and physicochemical similarities to lithium, has emerged as a promising candidate for advanced energy storage technologies. However, the advancement of potassium-ion hybrid capacitors (PIHCs) encounters substantial challenges owing to the larger ionic radius of K<sup>+</sup> ions, which results in slowed electrochemical kinetics and severe anode volume expansion during cycling. This study presents a facile one-step pyrolysis method for synthesizing two-dimensional edge‐enriched N‐doped porous carbon nanosheets (NPCNs) using zinc as a dual-function catalyst/template. Through a synergistic combination of density functional theory calculations, experimental characterizations, and kinetic analyses, we demonstrate that these architecturally optimized nanosheets effectively accommodate volume strain while maintaining exceptional mechanical stability. The edge-enriched nitrogen doping introduces abundant lone-pair electrons, significantly improving surface-induced capacitive storage. The as-designed NPCNs-2 delivers outstanding electrochemical performance. In potassium-ion batteries, it exhibits a high reversible capacity of 300 mAh g<sup>−1</sup> after 300 cycles at 0.2 A g<sup>−1</sup> and maintains 175 mAh g<sup>−1</sup> even at 1.0 A g<sup>−1</sup>. When configured into PIHCs, the full cell achieves remarkable energy and power densities (270 Wh kg<sup>−1</sup>/3000 W kg<sup>−1</sup>). This work not only reveals fundamental structure-performance correlations, but also provides a scalable synthetic paradigm for the advancement of high-efficiency potassium-based energy storage systems.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"246 ","pages":"Article 120945"},"PeriodicalIF":11.6,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145358889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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