Carbon最新文献_第4页

MXene/Biomass-derived activated carbon composite for supercapacitor applications

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-08 DOI: 10.1016/j.carbon.2025.120101

Rohit Sinha, P. Sai Kiran, K. Vijay Kumar, Niranjan Pandit, Chintham Satish, Saurav Keshri, Anup Kumar Keshri

Two-dimensional (2D) MXenes (e.g., Ti₃C₂Tₓ) have garnered significant interest in supercapacitor applications because of their outstanding conductivity, hydrophilicity, and charge storage capabilities. However, the inherent tendency of MXenes to restack and agglomerate severely limits electrolyte accessibility and reduces their electrochemical performance. To address this limitation, creating three-dimensional (3D) porous architectures by introducing interlayer spacers has emerged as an effective strategy. Conventionally, expensive spacers like graphene, carbon nanotubes, polypyrrole, reduced graphene oxide, etc., have been employed, which restricts scalability and cost-efficiency. Herein, we present a sustainable and cost-effective approach by synthesizing porous activated carbon (AC) derived from biomass waste (orange peels) and incorporating it as a spacer within Ti₃C₂Tₓ MXene layers. The resulting Ti₃C₂Tₓ/AC composite demonstrates enhanced structural stability through increased open spaces and expanded interlayer spacing (d = ∼1.1 nm), improved hydrophilicity (contact angle (CA): 13.46°), and superior electrolyte accessibility. Electrochemical evaluation in aqueous electrolyte shown a specific capacitance of 407 F g⁻¹ at 5 mV s⁻¹. Furthermore, the fabricated all solid-state supercapacitor (ASSC) showed the rate capability of up to 5000 cycles with an outstanding 96.36 % coulombic efficiency and 92.98 % capacitance retention, proving long-term stability in an aqueous environment. Our study underscores the dual advantage of valorizing biomass waste for creating porous carbon and achieving scalable, environmentally friendly MXene composites with optimized electrochemical properties for supercapacitor applications in aqueous electrolyte.

{"title":"MXene/Biomass-derived activated carbon composite for supercapacitor applications","authors":"Rohit Sinha, P. Sai Kiran, K. Vijay Kumar, Niranjan Pandit, Chintham Satish, Saurav Keshri, Anup Kumar Keshri","doi":"10.1016/j.carbon.2025.120101","DOIUrl":"10.1016/j.carbon.2025.120101","url":null,"abstract":"<div><div>Two-dimensional (2D) MXenes (e.g., Ti₃C₂Tₓ) have garnered significant interest in supercapacitor applications because of their outstanding conductivity, hydrophilicity, and charge storage capabilities. However, the inherent tendency of MXenes to restack and agglomerate severely limits electrolyte accessibility and reduces their electrochemical performance. To address this limitation, creating three-dimensional (3D) porous architectures by introducing interlayer spacers has emerged as an effective strategy. Conventionally, expensive spacers like graphene, carbon nanotubes, polypyrrole, reduced graphene oxide, etc., have been employed, which restricts scalability and cost-efficiency. Herein, we present a sustainable and cost-effective approach by synthesizing porous activated carbon (AC) derived from biomass waste (orange peels) and incorporating it as a spacer within Ti₃C₂Tₓ MXene layers. The resulting Ti₃C₂Tₓ/AC composite demonstrates enhanced structural stability through increased open spaces and expanded interlayer spacing (d = ∼1.1 nm), improved hydrophilicity (contact angle (CA): 13.46°), and superior electrolyte accessibility. Electrochemical evaluation in aqueous electrolyte shown a specific capacitance of 407 F g<sup>−1</sup> at 5 mV s<sup>−1</sup>. Furthermore, the fabricated all solid-state supercapacitor (ASSC) showed the rate capability of up to 5000 cycles with an outstanding 96.36 % coulombic efficiency and 92.98 % capacitance retention, proving long-term stability in an aqueous environment. Our study underscores the dual advantage of valorizing biomass waste for creating porous carbon and achieving scalable, environmentally friendly MXene composites with optimized electrochemical properties for supercapacitor applications in aqueous electrolyte.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"236 ","pages":"Article 120101"},"PeriodicalIF":10.5,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143388491","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

Optical resolution of single-walled carbon nanotubes through wrapping with chiral metal coordination polymers followed by interlocking with metal-tethered tetragonal nanobrackets

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-08 DOI: 10.1016/j.carbon.2025.120102

Guoqing Cheng , Takuya Hayashi , Xinyi Fu , Naoki Komatsu

Since the optically active carbon nanotubes (CNTs) were first separated in 2007, many CNTs have been optically resolved mostly by use of chiral surfactants, (bio)polymers and host molecules. In this work, simple metal salts consisting of chiral ligands and metal ion successfully discriminate the handedness or helicity of single-walled carbon nanotubes (SWNTs). Actually, optically active SWNTs were separated with sequential addition of copper (R)- and (S)-mandelate ((R)- and (S)-CuL¹₂, respectively) and dipyrrin nanobracket. After removal of the metal salt and nanobracket, a pair of dispersions gave symmetrical CD spectra, indicating that the small chiral molecules or mandelates discriminate the handedness of SWNTs. The following two steps are conceivable in this optical resolution; 1) the helicity of SWNTs was discriminated through selective wrapping with chiral coordination polymers formed by (R)- and (S)-CuL¹₂, and 2) the SWNTs wrapped with the coordination polymers were selectively dispersed through interlocking by dipyrrin nanobracket copper complexes. The experimental results are supported by the theoretical calculations; the van der Waals interaction of (R)-CuL₂ with (P)-(6,5)-SWNTs is stronger than that with (M)-(6,5)-SWNTs.

{"title":"Optical resolution of single-walled carbon nanotubes through wrapping with chiral metal coordination polymers followed by interlocking with metal-tethered tetragonal nanobrackets","authors":"Guoqing Cheng , Takuya Hayashi , Xinyi Fu , Naoki Komatsu","doi":"10.1016/j.carbon.2025.120102","DOIUrl":"10.1016/j.carbon.2025.120102","url":null,"abstract":"<div><div>Since the optically active carbon nanotubes (CNTs) were first separated in 2007, many CNTs have been optically resolved mostly by use of chiral surfactants, (bio)polymers and host molecules. In this work, simple metal salts consisting of chiral ligands and metal ion successfully discriminate the handedness or helicity of single-walled carbon nanotubes (SWNTs). Actually, optically active SWNTs were separated with sequential addition of copper (<em>R</em>)- and (<em>S</em>)-mandelate ((<em>R</em>)- and (<em>S</em>)-Cu<strong>L</strong><sup><strong>1</strong></sup><sub>2</sub>, respectively) and dipyrrin nanobracket. After removal of the metal salt and nanobracket, a pair of dispersions gave symmetrical CD spectra, indicating that the small chiral molecules or mandelates discriminate the handedness of SWNTs. The following two steps are conceivable in this optical resolution; 1) the helicity of SWNTs was discriminated through selective wrapping with chiral coordination polymers formed by (<em>R</em>)- and (<em>S</em>)-Cu<strong>L</strong><sup><strong>1</strong></sup><sub>2</sub>, and 2) the SWNTs wrapped with the coordination polymers were selectively dispersed through interlocking by dipyrrin nanobracket copper complexes. The experimental results are supported by the theoretical calculations; the van der Waals interaction of (<em>R</em>)-Cu<strong>L</strong><sub>2</sub> with (<em>P</em>)-(6,5)-SWNTs is stronger than that with (<em>M</em>)-(6,5)-SWNTs.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"236 ","pages":"Article 120102"},"PeriodicalIF":10.5,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421931","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

Recent progress in graphene based materials for high-performance electromagnetic shielding

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-08 DOI: 10.1016/j.carbon.2025.120093

Yiyao Yu, Xianbin Liu, Dunqi Lu, Ting Liu, Yesheng Li, Ziping Wu

Electromagnetic (EM) signal safety and wave pollution have become ignored problems in the contemporary information era. Graphene-based materials are the most promising candidates for solving these two issues owing to their unique structural features and excellent EM properties. Designing ultrathin graphene-based materials with controllable multi-scale structures and outstanding characters can effectively improve the EM shielding parameters. In this review, the latest advances of multi-scale design strategies and application of graphene-based materials in high-performance EM shielding are summarized systematically. The mechanism of EM shielding and key influence factors are firstly discussed in detail. Then, the advantages and multi-scale structures majorization of graphene for EM shielding fields are outlined, including defect, doping and densifying. Thirdly, various kinds of micro/macroscale graphene-based materials are reviewed and compared, such as pure graphene films, foams, composites and multi-functional graphene materials, meanwhile the relationship between the structures of graphene and the value of EM shielding is in-depth analysis. Finally, the present challenges and future prospects in the field of graphene-based EM shielding applications are predicated. This review would provide new ideas and directions for high-performance graphene-based EM shielding.

{"title":"Recent progress in graphene based materials for high-performance electromagnetic shielding","authors":"Yiyao Yu, Xianbin Liu, Dunqi Lu, Ting Liu, Yesheng Li, Ziping Wu","doi":"10.1016/j.carbon.2025.120093","DOIUrl":"10.1016/j.carbon.2025.120093","url":null,"abstract":"<div><div>Electromagnetic (EM) signal safety and wave pollution have become ignored problems in the contemporary information era. Graphene-based materials are the most promising candidates for solving these two issues owing to their unique structural features and excellent EM properties. Designing ultrathin graphene-based materials with controllable multi-scale structures and outstanding characters can effectively improve the EM shielding parameters. In this review, the latest advances of multi-scale design strategies and application of graphene-based materials in high-performance EM shielding are summarized systematically. The mechanism of EM shielding and key influence factors are firstly discussed in detail. Then, the advantages and multi-scale structures majorization of graphene for EM shielding fields are outlined, including defect, doping and densifying. Thirdly, various kinds of micro/macroscale graphene-based materials are reviewed and compared, such as pure graphene films, foams, composites and multi-functional graphene materials, meanwhile the relationship between the structures of graphene and the value of EM shielding is in-depth analysis. Finally, the present challenges and future prospects in the field of graphene-based EM shielding applications are predicated. This review would provide new ideas and directions for high-performance graphene-based EM shielding.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"236 ","pages":"Article 120093"},"PeriodicalIF":10.5,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421926","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

Self-amplifying ROS-responsive SN38 prodrug nanoparticles for combined chemotherapy and ferroptosis in cancer treatment

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-07 DOI: 10.1016/j.carbon.2025.120099

Yu Qin , Na Liu , Fenghui Wang , Zeping Gao , Cong Luo , Chutong Tian , Ken-ichiro Kamei

SN38 (7-ethyl-10-hydroxycamptothecin), one of the most potent camptothecin (CPT) derivatives, is limited in clinical application by its inherent drawbacks and severe adverse effects. Stimulus-responsive, carrier-free prodrug nano-delivery systems offer a promising solution to these challenges. Furthermore, single-agent chemotherapy often yields suboptimal outcomes, underscoring the need for combinatorial treatment strategies that incorporate ferroptosis. Here we present a reactive oxygen species (ROS)-responsive SN38 dimeric prodrug nanoparticle (SN38-CA@FC NPs) designed for combined chemotherapy and ferroptosis therapy. A thioacetal linker was introduced between SN38 and the ROS generator cinnamic aldehyde (CA) to produce a ROS-responsive SN38 dimeric prodrug (SN38-CA). This prodrug was subsequently co-assembled with ferrocene carboxaldehyde (FC) via a single-step nanoprecipitation method. Exploiting the enhanced permeability and retention (EPR) effect and elevated ROS levels in the tumor microenvironment, SN38-CA@FC NPs enable tumor-specific “smart” drug release. Released SN38 inhibits topoisomerase I and induces DNA damage for effective chemotherapy, while released CA promotes the Fenton reaction, disrupting redox homeostasis and inducing ferroptosis in tumor cells. Notably, ROS-triggered release of SN38 and CA further amplifies ROS production, thus establishing a self-reinforcing “ROS trigger–drug release–ROS generation–ROS trigger” feedback loop. Both in vitro and in vivo experiments demonstrated that SN38-CA@FC NPs exert significant antitumor activity against A549 and LLC cell lines, as well as in an LLC xenograft mouse model. These findings highlight a promising platform for enhancing the efficacy of chemotherapeutic agents and ferroptosis-based therapies in cancer treatment.

{"title":"Self-amplifying ROS-responsive SN38 prodrug nanoparticles for combined chemotherapy and ferroptosis in cancer treatment","authors":"Yu Qin , Na Liu , Fenghui Wang , Zeping Gao , Cong Luo , Chutong Tian , Ken-ichiro Kamei","doi":"10.1016/j.carbon.2025.120099","DOIUrl":"10.1016/j.carbon.2025.120099","url":null,"abstract":"<div><div>SN38 (7-ethyl-10-hydroxycamptothecin), one of the most potent camptothecin (CPT) derivatives, is limited in clinical application by its inherent drawbacks and severe adverse effects. Stimulus-responsive, carrier-free prodrug nano-delivery systems offer a promising solution to these challenges. Furthermore, single-agent chemotherapy often yields suboptimal outcomes, underscoring the need for combinatorial treatment strategies that incorporate ferroptosis. Here we present a reactive oxygen species (ROS)-responsive SN38 dimeric prodrug nanoparticle (SN38-CA@FC NPs) designed for combined chemotherapy and ferroptosis therapy. A thioacetal linker was introduced between SN38 and the ROS generator cinnamic aldehyde (CA) to produce a ROS-responsive SN38 dimeric prodrug (SN38-CA). This prodrug was subsequently co-assembled with ferrocene carboxaldehyde (FC) via a single-step nanoprecipitation method. Exploiting the enhanced permeability and retention (EPR) effect and elevated ROS levels in the tumor microenvironment, SN38-CA@FC NPs enable tumor-specific “smart” drug release. Released SN38 inhibits topoisomerase I and induces DNA damage for effective chemotherapy, while released CA promotes the Fenton reaction, disrupting redox homeostasis and inducing ferroptosis in tumor cells. Notably, ROS-triggered release of SN38 and CA further amplifies ROS production, thus establishing a self-reinforcing “ROS trigger–drug release–ROS generation–ROS trigger” feedback loop. Both <em>in vitro</em> and <em>in vivo</em> experiments demonstrated that SN38-CA@FC NPs exert significant antitumor activity against A549 and LLC cell lines, as well as in an LLC xenograft mouse model. These findings highlight a promising platform for enhancing the efficacy of chemotherapeutic agents and ferroptosis-based therapies in cancer treatment.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"235 ","pages":"Article 120099"},"PeriodicalIF":10.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377321","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

Reversibility without over-potential of fluorinated graphite in lithium batteries

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-07 DOI: 10.1016/j.carbon.2025.120035

Marie Colin , Killian Henry , Elodie Petit , Brigitte Vigolo , Mélanie Emo , Jaafar Ghanbaja , Katia Guérin , Marc Dubois

When used as positive electrode in lithium batteries, fl uorinated carbons deliver capacities and energy densities that exceed those of other commercial primary batteries. In addition, these materials can be used over a wide range of temperatures, allowing them to diversify their utilization and have a lifespan of 15 years. However, when using the fluorinated carbon-based battery, a very stable compound, lithium fluoride, is formed and prevents the reversibility of the process, i.e. the use in secondary battery. Systems with a fluorinated carbon cathode are then called primary battery, non-rechargeable systems. In the present work, graphite fluorides with weakened covalency for the C–F bonds are considered as cathode in secondary lithium battery with polymer electrolyte. Such a combination of non-conventional graphite fluoride and polymer electrolyte allows the reversibility to be achieved without significant polarization contrary to the previous works in the literature. Non optimized reversible capacity of 65 mAh/g without high over-potential between the reduction and oxidation processes is achieved.

{"title":"Reversibility without over-potential of fluorinated graphite in lithium batteries","authors":"Marie Colin , Killian Henry , Elodie Petit , Brigitte Vigolo , Mélanie Emo , Jaafar Ghanbaja , Katia Guérin , Marc Dubois","doi":"10.1016/j.carbon.2025.120035","DOIUrl":"10.1016/j.carbon.2025.120035","url":null,"abstract":"<div><div>When used as positive electrode in lithium batteries, fl uorinated carbons deliver capacities and energy densities that exceed those of other commercial primary batteries. In addition, these materials can be used over a wide range of temperatures, allowing them to diversify their utilization and have a lifespan of 15 years. However, when using the fluorinated carbon-based battery, a very stable compound, lithium fluoride, is formed and prevents the reversibility of the process, <em>i.e</em>. the use in secondary battery. Systems with a fluorinated carbon cathode are then called primary battery, non-rechargeable systems. In the present work, graphite fluorides with weakened covalency for the C–F bonds are considered as cathode in secondary lithium battery with polymer electrolyte. Such a combination of non-conventional graphite fluoride and polymer electrolyte allows the reversibility to be achieved without significant polarization contrary to the previous works in the literature. Non optimized reversible capacity of 65 mAh/g without high over-potential between the reduction and oxidation processes is achieved.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"237 ","pages":"Article 120035"},"PeriodicalIF":10.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Importance of defect site concentration on carbon electrodes over heteroatom functionalities for vanadium redox kinetics in redox flow batteries

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-06 DOI: 10.1016/j.carbon.2025.120094

Jihun Paick , Jaeho Jo , Doohwan Lee

Heteroatom doping is a well-established approach to improving the electrocatalytic performance of carbon electrodes in vanadium redox flow batteries (VRFBs). This study investigates the primary kinetic factors driving the enhanced vanadium redox kinetics on heteroatom-doped carbon electrodes. Graphene samples doped with heteroatoms, including p-type (boron) and n-type (nitrogen, oxygen, and phosphorous) species, were prepared by a sequential impregnation and thermal treatment process, with variations in the dopant type and structural configuration. Comprehensive analyses of structural and electrocatalytic properties revealed a strong correlation between the intrinsic vanadium redox kinetics and the concentration of surface defects on carbon electrodes. In contrast, the impact of heteroatom functionalities, including their surface concentration and structural configuration, was found to be minimal. These finding underscore the pivotal role of the defect sites over heteroatom functionalities in enhancing the vanadium redox kinetics on carbon electrodes. Additionally, the study demonstrated that depositing graphene with abundant surface defects onto conventional carbon paper electrodes led to marked improvements in the energy storage capacity and charge-discharge efficiencies of VRFBs. This highlights the potential of defect-engineered carbon materials for advancing VRFB performance.

{"title":"Importance of defect site concentration on carbon electrodes over heteroatom functionalities for vanadium redox kinetics in redox flow batteries","authors":"Jihun Paick , Jaeho Jo , Doohwan Lee","doi":"10.1016/j.carbon.2025.120094","DOIUrl":"10.1016/j.carbon.2025.120094","url":null,"abstract":"<div><div>Heteroatom doping is a well-established approach to improving the electrocatalytic performance of carbon electrodes in vanadium redox flow batteries (VRFBs). This study investigates the primary kinetic factors driving the enhanced vanadium redox kinetics on heteroatom-doped carbon electrodes. Graphene samples doped with heteroatoms, including <em>p</em>-type (boron) and <em>n</em>-type (nitrogen, oxygen, and phosphorous) species, were prepared by a sequential impregnation and thermal treatment process, with variations in the dopant type and structural configuration. Comprehensive analyses of structural and electrocatalytic properties revealed a strong correlation between the intrinsic vanadium redox kinetics and the concentration of surface defects on carbon electrodes. In contrast, the impact of heteroatom functionalities, including their surface concentration and structural configuration, was found to be minimal. These finding underscore the pivotal role of the defect sites over heteroatom functionalities in enhancing the vanadium redox kinetics on carbon electrodes. Additionally, the study demonstrated that depositing graphene with abundant surface defects onto conventional carbon paper electrodes led to marked improvements in the energy storage capacity and charge-discharge efficiencies of VRFBs. This highlights the potential of defect-engineered carbon materials for advancing VRFB performance.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"235 ","pages":"Article 120094"},"PeriodicalIF":10.5,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377320","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

Ni-MOF-derived NiPt dual atoms self-supporting electrode by inkjet printing for hydrogen evolution reaction

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-06 DOI: 10.1016/j.carbon.2025.120098

Sha Li, Jing Yu, Qi Liu, Jingyuan Liu, Dalei Song, Jiahui Zhu, Rumin Li, Jun Wang

Exploring electrocatalysts with high catalytic activity is an important way to develop hydrogen production from catalytic water splitting. Dual atoms catalysts (DACs) possess the same advantages as single-atom catalysts. In addition, DACs also have multiple active sites, which can reduce the amount of noble metal materials while maintaining their original catalytic activity, and are expected to be an effective strategy for the preparation of noble metal-based catalysts. Herein, a NiPt dual atoms self-supporting electrode loaded on carbon sponges (NiPt DAs/CMS) was proposed by inkjet printing NiPt-MOF precursor on melamine sponge, followed by the high-temperature pyrolysis. The randomly distributed dual atoms configuration was confirmed by the aberration-corrected transmission electron microscope. The prepared materials were directly used as working electrodes with high stability to maintain a constant hydrogen evolution overpotential for up to 27 h in acidic media without decaying. In addition, the Pt loading is only 1.41 wt% in NiPt DAs/CMS, much lower than the commercial Pt/C (20 wt%), which opens a new opportunity for the large-scale development of Pt-based catalysts.

{"title":"Ni-MOF-derived NiPt dual atoms self-supporting electrode by inkjet printing for hydrogen evolution reaction","authors":"Sha Li, Jing Yu, Qi Liu, Jingyuan Liu, Dalei Song, Jiahui Zhu, Rumin Li, Jun Wang","doi":"10.1016/j.carbon.2025.120098","DOIUrl":"10.1016/j.carbon.2025.120098","url":null,"abstract":"<div><div>Exploring electrocatalysts with high catalytic activity is an important way to develop hydrogen production from catalytic water splitting. Dual atoms catalysts (DACs) possess the same advantages as single-atom catalysts. In addition, DACs also have multiple active sites, which can reduce the amount of noble metal materials while maintaining their original catalytic activity, and are expected to be an effective strategy for the preparation of noble metal-based catalysts. Herein, a NiPt dual atoms self-supporting electrode loaded on carbon sponges (NiPt DAs/CMS) was proposed by inkjet printing NiPt-MOF precursor on melamine sponge, followed by the high-temperature pyrolysis. The randomly distributed dual atoms configuration was confirmed by the aberration-corrected transmission electron microscope. The prepared materials were directly used as working electrodes with high stability to maintain a constant hydrogen evolution overpotential for up to 27 h in acidic media without decaying. In addition, the Pt loading is only 1.41 wt% in NiPt DAs/CMS, much lower than the commercial Pt/C (20 wt%), which opens a new opportunity for the large-scale development of Pt-based catalysts.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"235 ","pages":"Article 120098"},"PeriodicalIF":10.5,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379337","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

Universal light-induced solid-state single-step approach for the in-situ synthesis of porous graphene-embedded nanoparticles

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-06 DOI: 10.1016/j.carbon.2025.120077

Gil Daffan , Gaurav Bahuguna , Avinash Kothuru , Fernando Patolsky

Metal nanoparticle-carbon (MNP-C) composites, which combine metal nanoparticles with conductive carbon materials like graphene, hold significant potential in medicine, electronics, energy, and environmental applications. However, conventional synthesis methods are often energy-intensive, multi-step, and complex, limiting scalability. In response, this study conducts an in-depth investigation into a versatile, one-step, additive-free laser synthesis method to create self-standing, three-dimensional porous graphene embedded with in-situ formed, tunable MNPs under ambient conditions. By blending laser-induced graphene (LIG) polymer precursors—such as phenolic resins—with various metal salt precursors, including transition, semi-metal, noble, alkali, and alkali earth metals, the method employs rapid, low-power laser irradiation to induce localized pyrolysis. This process simultaneously forms the LIG matrix and embedded nanoparticles, which are either metallic or metal oxides correlating to the reduction potential of the parent metal center. By self-generating a localized carbothermal reducing environment, the investigated method can eliminate the need for additional reducing agents or controlled atmospheres at certain reduction potentials. Moreover, tuning the size and dispersity of the strongly embedded MNPs is displayed by adjusting salt concentrations and lasing parameters. The presented “toolbox" provides a universal and efficient blueprint for producing tunable MNPs embedded within functionalized porous graphene matrices. Additionally, we explore the electrocatalytic properties of these composites for water-splitting applications (>1000 h at ∼300 mV overpotential), demonstrating their high potential in energy conversion technologies.

{"title":"Universal light-induced solid-state single-step approach for the in-situ synthesis of porous graphene-embedded nanoparticles","authors":"Gil Daffan , Gaurav Bahuguna , Avinash Kothuru , Fernando Patolsky","doi":"10.1016/j.carbon.2025.120077","DOIUrl":"10.1016/j.carbon.2025.120077","url":null,"abstract":"<div><div>Metal nanoparticle-carbon (MNP-C) composites, which combine metal nanoparticles with conductive carbon materials like graphene, hold significant potential in medicine, electronics, energy, and environmental applications. However, conventional synthesis methods are often energy-intensive, multi-step, and complex, limiting scalability. In response, this study conducts an in-depth investigation into a versatile, one-step, additive-free laser synthesis method to create self-standing, three-dimensional porous graphene embedded with in-situ formed, tunable MNPs under ambient conditions. By blending laser-induced graphene (LIG) polymer precursors—such as phenolic resins—with various metal salt precursors, including transition, semi-metal, noble, alkali, and alkali earth metals, the method employs rapid, low-power laser irradiation to induce localized pyrolysis. This process simultaneously forms the LIG matrix and embedded nanoparticles, which are either metallic or metal oxides correlating to the reduction potential of the parent metal center. By self-generating a localized carbothermal reducing environment, the investigated method can eliminate the need for additional reducing agents or controlled atmospheres at certain reduction potentials. Moreover, tuning the size and dispersity of the strongly embedded MNPs is displayed by adjusting salt concentrations and lasing parameters. The presented “toolbox\" provides a universal and efficient blueprint for producing tunable MNPs embedded within functionalized porous graphene matrices. Additionally, we explore the electrocatalytic properties of these composites for water-splitting applications (>1000 h at ∼300 mV overpotential), demonstrating their high potential in energy conversion technologies.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"235 ","pages":"Article 120077"},"PeriodicalIF":10.5,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377323","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

Recent progress of microwave absorption motivated by metal single atoms anchored on two-dimensional materials

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-06 DOI: 10.1016/j.carbon.2025.120095

Zhaozuo Zhang , Yao Kong , Jinming Zhang , Jie Hou , Maosheng Cao , Xiaoxia Wang

Recently, metal single atoms anchored on two-dimensional materials (MSA/2DMs), with designable polarization centers, amplified polarization loss, and adjustable structural loss, have been explored for advanced microwave absorption (MA) materials to address increasing electromagnetic pollution and interference in both military and civilian fields. However, research on the relationship between electronic states at interfaces and corresponding electromagnetic properties is insufficient, leading to an inadequate analysis of electromagnetic wave attenuation mechanisms in MSA/2DMs. Herein, based on recent researches, this review presents the preparation difficulties on dispersion, introduces absorption characteristics and advanced techniques for polarization loss, and explores the origin of dielectric loss based on electronic states and asymmetric coordination configurations. Furthermore, the review outlines new challenges and perspectives for development of MSA/2DMs, covering structural design and MA performance optimization. Focusing on the interfacial interaction between MSA and 2D support, it provides insights into attenuation mechanisms from a microcosmic viewpoint, and aims to inspire new ideas in exploration of MSA/2DMs.

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引用次数: 0

Functionalized graphene microspheres for high volumetric energy density supercapacitors

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-06 DOI: 10.1016/j.carbon.2025.120097

Huimin Shi , Lili Jiang , Shanchun Sun , Ziwen Guo , Huijun Guo , Shudong Geng , Jianping Li , Dai Wu , Xiaoming Zhou , Lizhi Sheng

The development of electrode materials with high packing density and superior volumetric performance is crucial to address the growing demand for compact supercapacitors in wearable electronics and electric vehicles. However, the low packing density of graphene limits its volumetric capacitance. To overcome this challenge, functionalized graphene microspheres (FGR) were synthesized through processes such as ozone oxidation, H₂O₂ etching, CNT incorporation, spray drying, and carbonization of graphene oxide ribbons (IGOR) with abundant edge sites. The resulting FGR provides numerous active sites, efficient electron and ion transport pathways, stable oxygen-containing functional groups, and a compact structure. These properties enable FGR to achieve high volumetric capacitance and excellent rate performance (442.8 and 308.0 F cm⁻³ at 1 and 100 A g⁻¹, respectively), high mass loadings (12 mg cm⁻²) and packing density (1.02 g cm⁻³). FGR-assembled symmetric supercapacitors (FGR//FGR) deliver a high volumetric energy density of 30.2 W h L⁻¹ at 120.9 W L⁻¹. These features make FGR-based supercapacitors highly relevant for industrial applications, including portable electronics, electric vehicles, and grid energy systems. The scalable synthesis approach and robust design further emphasize their potential for widespread industrial adoption.

{"title":"Functionalized graphene microspheres for high volumetric energy density supercapacitors","authors":"Huimin Shi , Lili Jiang , Shanchun Sun , Ziwen Guo , Huijun Guo , Shudong Geng , Jianping Li , Dai Wu , Xiaoming Zhou , Lizhi Sheng","doi":"10.1016/j.carbon.2025.120097","DOIUrl":"10.1016/j.carbon.2025.120097","url":null,"abstract":"<div><div>The development of electrode materials with high packing density and superior volumetric performance is crucial to address the growing demand for compact supercapacitors in wearable electronics and electric vehicles. However, the low packing density of graphene limits its volumetric capacitance. To overcome this challenge, functionalized graphene microspheres (FGR) were synthesized through processes such as ozone oxidation, H<sub>2</sub>O<sub>2</sub> etching, CNT incorporation, spray drying, and carbonization of graphene oxide ribbons (IGOR) with abundant edge sites. The resulting FGR provides numerous active sites, efficient electron and ion transport pathways, stable oxygen-containing functional groups, and a compact structure. These properties enable FGR to achieve high volumetric capacitance and excellent rate performance (442.8 and 308.0 F cm<sup>−3</sup> at 1 and 100 A g<sup>−1</sup>, respectively), high mass loadings (12 mg cm<sup>−2</sup>) and packing density (1.02 g cm<sup>−3</sup>). FGR-assembled symmetric supercapacitors (FGR//FGR) deliver a high volumetric energy density of 30.2 W h L<sup>−1</sup> at 120.9 W L<sup>−1</sup>. These features make FGR-based supercapacitors highly relevant for industrial applications, including portable electronics, electric vehicles, and grid energy systems. The scalable synthesis approach and robust design further emphasize their potential for widespread industrial adoption.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"236 ","pages":"Article 120097"},"PeriodicalIF":10.5,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395317","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