Nano Research最新文献

High-performance thermal interface materials enabled by vertical alignment of lightweight and soft graphene foams 通过垂直排列轻质软石墨烯泡沫实现高性能热界面材料

IF 9.5 2区材料科学

Nano Research Pub Date : 2024-09-27 DOI: 10.1007/s12274-024-6985-7

Huaqiang Fu, Renqiang Fang, Chao Tian, Wei Qian, Shiya Cao, Ziran Zhang, Xiaoxi Xu, Chuang Yao, Zhe Wang, Daping He

{"title":"High-performance thermal interface materials enabled by vertical alignment of lightweight and soft graphene foams","authors":"Huaqiang Fu, Renqiang Fang, Chao Tian, Wei Qian, Shiya Cao, Ziran Zhang, Xiaoxi Xu, Chuang Yao, Zhe Wang, Daping He","doi":"10.1007/s12274-024-6985-7","DOIUrl":"10.1007/s12274-024-6985-7","url":null,"abstract":"<div><p>High-performance thermal interface materials (TIMs) are highly sought after for modern electronics. Two-dimensional (2D) materials as vertical aligned fillers can optimize the out-plane thermal conductivity (<i>k</i><sub>⊥</sub>), but their excessively high content or intrinsic rigidness deteriorate TIMs softness, leading to worsening for thermal contact resistance (<i>R</i><sub>contact</sub>). In this study, 2D graphene materials are fabricated into lightweight and soft graphene foams (GFs) with high-orientation, acting as vertical filler frameworks to optimize the <i>k</i><sub>⊥</sub> and <i>R</i><sub>contact</sub> for vertical GF (VGF) TIMs. The VGF-TIM has a high <i>k</i><sub>⊥</sub> of 47.9 W·m<sup>−1</sup>·K<sup>−1</sup> at a low graphene content of 15.5 wt.%. Due to the softness and low filler contents of GFs, the VGF-TIM exhibits a low compressive module (4.2 MPa), demonstrating excellent compressibility. The resulting TIM exhibit a low contact resistance of 24.4 K·mm<sup>2</sup>·W<sup>−1</sup>, demonstrating 185.1% higher cooling efficiency in practical heat dissipating scenario compared to commercial advanced TIMs. This work provides guidelines for the design of advanced TIMs and their applications in thermal management.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":713,"journal":{"name":"Nano Research","volume":"17 11","pages":"9293 - 9299"},"PeriodicalIF":9.5,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579478","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

Liquid-encapsulated quantum dot for enhanced UV and thermal stability of quantum dot color conversion films 液态封装量子点可增强量子点色彩转换薄膜的紫外线和热稳定性

IF 9.9 2区材料科学

Nano Research Pub Date : 2024-09-17 DOI: 10.1007/s12274-024-6971-0

Ronghuan Liu, Fan Fang, Pai Liu, Xijian Duan, Kai Wang, Xiao Wei Sun

{"title":"Liquid-encapsulated quantum dot for enhanced UV and thermal stability of quantum dot color conversion films","authors":"Ronghuan Liu, Fan Fang, Pai Liu, Xijian Duan, Kai Wang, Xiao Wei Sun","doi":"10.1007/s12274-024-6971-0","DOIUrl":"https://doi.org/10.1007/s12274-024-6971-0","url":null,"abstract":"<p>Encapsulation is a widely recognized method for enhancing the stability of colloidal quantum dots (CQDs). However, traditional encapsulation methods for solid-state materials expose encapsulated CQDs to risks such as ligand loss and poor dispersion. Additionally, these encapsulated CQDs still face the risk of aging due to surface ligand bond breakage under high-energy radiation. In this study, we found that quantum dots in solution exhibited enhanced ultraviolet (UV) tolerance compared to their counterparts in solid form under an inert atmosphere. We attribute this enhancement to improved ligand retention and self-healing of quantum dots in solution. Herein, we introduce a novel method for fabricating liquid-encapsulated quantum dot (LEQD) color conversion films. This technique leverages the self-healing capability of ligands in liquid-state quantum dots to enhance the UV and thermal stability of the quantum dot color conversion films. Experimental results demonstrate that LEQD films exhibit better resistance to UV radiation and high temperatures than solid-encapsulated quantum dot (SEQD) color conversion films. After 400 h of exposure to 100 mW blue light-emitting device (LED) light at 60 °C and 90% humidity, the brightness of LEQD film retained 90% of its initial level. This liquid-state quantum dot encapsulation approach offers a promising pathway for developing more durable quantum dot color conversion films.\u0000</p>","PeriodicalId":713,"journal":{"name":"Nano Research","volume":"107 1","pages":""},"PeriodicalIF":9.9,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142269155","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

Precise synthesis of dual atom sites for electrocatalysis 电催化双原子位点的精确合成

IF 9.5 2区材料科学

Nano Research Pub Date : 2024-09-17 DOI: 10.1007/s12274-024-6940-7

Yao Wang, Fengya Ma, Guoqing Zhang, Jiawei Zhang, Hui Zhao, Yuming Dong, Dingsheng Wang

{"title":"Precise synthesis of dual atom sites for electrocatalysis","authors":"Yao Wang, Fengya Ma, Guoqing Zhang, Jiawei Zhang, Hui Zhao, Yuming Dong, Dingsheng Wang","doi":"10.1007/s12274-024-6940-7","DOIUrl":"10.1007/s12274-024-6940-7","url":null,"abstract":"<div><p>Single atom sites are widely applied in various electrocatalytic fields due to high atom utilization, mass activity, and selectivity. They are limited in catalyzing multi-electron reactions due to their intrinsic mono-metal center feature. Dual atom sites (DASs) as promising candidate have received enormous attentions because adjacent active sites can accelerate their catalytic performance via synergistic effect. Herein, the fundamental understandings and intrinsic mechanism underlying DASs and corresponding electrocatalytic applications are systemically summarized. Different synergy dual sites are presented to disclose the structure-performance relationship with engineering the well-defined DASs on the basis of theoretical principle. An overview of the electrocatalytic applications is showed, including oxygen reduction reaction, hydrogen evolution reaction, oxygen evolution reaction, carbon dioxide reduction reaction, and nitrogen reduction reaction. Finally, a conclusion and future prospective are provided to reveal the current challenges for rational designing, synthesizing, and modulating the advanced DASs toward electrocatalytic reactions.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":713,"journal":{"name":"Nano Research","volume":"17 11","pages":"9397 - 9427"},"PeriodicalIF":9.5,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257015","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

Exploring the potential of simple automation concepts for quantifying functional groups on nanomaterials with optical assays 探索利用光学测定法量化纳米材料上功能基团的简单自动化概念的潜力

IF 9.9 2区材料科学

Nano Research Pub Date : 2024-09-14 DOI: 10.1007/s12274-024-6970-1

Isabella Tavernaro, Anna Matiushkina, Kai Simon Rother, Celina Mating, Ute Resch-Genger

{"title":"Exploring the potential of simple automation concepts for quantifying functional groups on nanomaterials with optical assays","authors":"Isabella Tavernaro, Anna Matiushkina, Kai Simon Rother, Celina Mating, Ute Resch-Genger","doi":"10.1007/s12274-024-6970-1","DOIUrl":"https://doi.org/10.1007/s12274-024-6970-1","url":null,"abstract":"<p>Until now, automation in nanomaterial research has been largely focused on the automated synthesis of engineered nanoparticles (NPs) including the screening of synthesis parameters and the automation of characterization methods such as electron microscopy. Despite the rapidly increasing number of NP samples analyzed due to increasing requirements on NP quality control, increasing safety concerns, and regulatory requirements, automation has not yet been introduced into workflows of analytical methods utilized for screening, monitoring, and quantifying functional groups (FGs) on NPs. To address this gap, we studied the potential of simple automation tools for the quantification of amino surface groups on different types of aminated NPs, varying in size, chemical composition, and optical properties, with the exemplarily chosen sensitive optical fluorescamine (Fluram) assay. This broadly applied, but reportedly error-prone assay, which utilizes a chromogenic reporter, involves multiple pipetting and dilution steps and photometric or fluorometric detection. In this study, we compared the influence of automated and manual pipetting on the results of this assay, which was automatically read out with a microplate reader. Special emphasis was dedicated to parameters like accuracy, consistency, achievable uncertainties, and speed of analysis and to possible interferences from the NPs. Our results highlight the advantages of automated surface FG quantification and the huge potential of automation for nanotechnology. In the future, this will facilitate process and quality control of NP fabrication, surface modification, and stability monitoring and help to produce large data sets for nanomaterial grouping approaches for sustainable and safe-by-design, performance, and risk assessment studies.\u0000</p>","PeriodicalId":713,"journal":{"name":"Nano Research","volume":"16 1","pages":""},"PeriodicalIF":9.9,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257016","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

Colloidal II–VI nanoplatelets for optoelectronic devices: Progress and perspectives 用于光电器件的胶体 II-VI 纳米片：进展与前景

IF 9.9 2区材料科学

Nano Research Pub Date : 2024-09-14 DOI: 10.1007/s12274-024-6965-y

An Hu, Li Ma, Xiaoyu Yang, Yige Yao, Yunke Zhu, Jingjing Qiu, Shuang Wang, Changjun Lu, Yunan Gao

引用次数: 0

Rational design and structural regulation of near-infrared silver chalcogenide quantum dots 近红外卤化银量子点的合理设计与结构调控

IF 9.9 2区材料科学

Nano Research Pub Date : 2024-09-14 DOI: 10.1007/s12274-024-6958-x

Zhen-Ya Liu, Wei Zhao, Li-Ming Chen, Yan-Yan Chen, Zhi-Gang Wang, An-An Liu, Dai-Wen Pang

{"title":"Rational design and structural regulation of near-infrared silver chalcogenide quantum dots","authors":"Zhen-Ya Liu, Wei Zhao, Li-Ming Chen, Yan-Yan Chen, Zhi-Gang Wang, An-An Liu, Dai-Wen Pang","doi":"10.1007/s12274-024-6958-x","DOIUrl":"https://doi.org/10.1007/s12274-024-6958-x","url":null,"abstract":"<p>Silver chalcogenides (Ag<sub>2</sub>E; E = S, Se, or Te) quantum dots (QDs) have emerged as promising candidates for near-infrared (NIR) applications. However, their narrow bandgap and small exciton Bohr radius render the optical properties of Ag<sub>2</sub>E QDs highly sensitive to surface and size variations. Moreover, the propensity for the formation of silver impurities and their low solubility product constants pose challenges in their controllable synthesis. Recent advancements have deepened our understanding of the relationship between the multi-hierarchical structure of Ag<sub>2</sub>E QDs and their optical properties. Through rational design and precise structural regulation, the performance of Ag<sub>2</sub>E QDs has been significantly enhanced across various applications. This review provides a comprehensive overview of historical and current progress in the synthesis and structural regulation of Ag<sub>2</sub>E QDs, encompassing aspects such as size control, crystal structure engineering, and surface/interface engineering. Additionally, it discusses outstanding challenges and potential opportunities in this field. The aim of this review is to promote the custom synthesis of Ag<sub>2</sub>E QDs for applications in biological imaging, and optoelectronics applications.\u0000</p>","PeriodicalId":713,"journal":{"name":"Nano Research","volume":"1 1","pages":""},"PeriodicalIF":9.9,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257014","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

Thermodynamically induced crystal restructuring to make CsPbCl3 single crystal films for weak light detection 利用热力学诱导晶体重组制造用于弱光探测的 CsPbCl3 单晶薄膜

IF 9.5 2区材料科学

Nano Research Pub Date : 2024-09-13 DOI: 10.1007/s12274-024-6967-9

Xiyan Pan, Tai An, Jie Sun, Hua Dong, Zhu Ma, Guangxing Liang, Yongbo Yuan, Yang Li, Wuqiang Wu, Yong Ding, Liming Ding

{"title":"Thermodynamically induced crystal restructuring to make CsPbCl3 single crystal films for weak light detection","authors":"Xiyan Pan, Tai An, Jie Sun, Hua Dong, Zhu Ma, Guangxing Liang, Yongbo Yuan, Yang Li, Wuqiang Wu, Yong Ding, Liming Ding","doi":"10.1007/s12274-024-6967-9","DOIUrl":"10.1007/s12274-024-6967-9","url":null,"abstract":"<div><p>CsPbCl<sub>3</sub> perovskite is considered a highly promising material for ultraviolet (UV) photodetectors due to its exceptional thermal stability and excellent short-wavelength light response. However, its high lattice energy and low polarizability result in extremely low solubility in conventional solvents, making the synthesis of CsPbCl<sub>3</sub> single crystals a significant challenge. In this study, we propose a novel thermodynamically induced crystal restructuring (TICR) process that can transform microcrystalline films (MCFs) into single crystal films (SCFs) within a short period. This method, for the first time, has successfully achieved the synthesis of centimeter-sized CsPbCl<sub>3</sub> SCFs and the mechanism has been explored in depth using <i>in-situ</i> techniques. Furthermore, we report the first instance of a CsPbCl<sub>3</sub> SCF UV photodiode, which exhibits a record-breaking on/off ratio of 3.32 × 10<sup>7</sup> and a detectivity of up to 1.15 × 10<sup>14</sup> Jones under 0 V bias. It demonstrates excellent response even under weak light conditions of 10 nW·cm<sup>−2</sup> and maintains outstanding stability with almost no performance degradation after 15 months. This study provides a novel approach for the synthesis of perovskite single crystals and holds significant potential for advancing the development of high-performance optoelectronic devices.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":713,"journal":{"name":"Nano Research","volume":"17 11","pages":"9775 - 9783"},"PeriodicalIF":9.5,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218597","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

Advanced emerging ambient energy harvesting technologies enabled by transition metal dichalcogenides: Opportunity and challenge 过渡金属二卤化物带来的先进新兴环境能量采集技术：机遇与挑战

IF 9.5 2区材料科学

Nano Research Pub Date : 2024-09-12 DOI: 10.1007/s12274-024-6959-9

Ning Sun, Yan Wang, Xianya Liu, Jianmin Li, Shiyan Wang, Yixiang Luo, Zhe Feng, Jie Dong, Mengyang Zhang, Fengshun Wang, Yang Li, Longlu Wang

{"title":"Advanced emerging ambient energy harvesting technologies enabled by transition metal dichalcogenides: Opportunity and challenge","authors":"Ning Sun, Yan Wang, Xianya Liu, Jianmin Li, Shiyan Wang, Yixiang Luo, Zhe Feng, Jie Dong, Mengyang Zhang, Fengshun Wang, Yang Li, Longlu Wang","doi":"10.1007/s12274-024-6959-9","DOIUrl":"10.1007/s12274-024-6959-9","url":null,"abstract":"<div><p>Environmental pollution and global warming caused by fossil fuels have become increasingly serious issues. Therefore, it is urgent to explore novel strategies to obtain sustainable, renewable and clean energy. Fortunately, ambient energy harvesting technologies, which are receiving increasing attention, provide an optimal solution. Additionally, the investigation of two-dimensional (2D) materials represented by transition metal dichalcogenides (TMDs) significantly facilitates the advancement of ambient energy harvesting technologies due to their unique properties, enabling the application of ambient energy harvesting. Herein, we summarized recent advances in the application of TMDs in thermal energy harvesting, osmotic energy harvesting, mechanical energy harvesting, water energy harvesting and radiofrequency energy harvesting respectively. In the meanwhile, we listed some representative structure and device optimization strategies for enhancing the energy conversion performance of these ambient energy harvesters, aiming to provide valuable insights for future investigations towards further optimization. Finally, we highlight the pressing issues currently faced in the application of the TMDs ambient energy harvesting technologies and propose some potential solutions to these challenges. We aimed to provide a comprehensive review in the applications of the energy harvesting technologies, in order to provide innovative insights for optimizing existing TMDs-based technologies.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":713,"journal":{"name":"Nano Research","volume":"17 11","pages":"9620 - 9639"},"PeriodicalIF":9.5,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227323","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

Hierarchical porous molybdenum carbide synergic morphological engineering towards broad multi-band tunable microwave absorption 分层多孔碳化钼协同形貌工程实现宽泛的多波段可调微波吸收

IF 9.9 2区材料科学

Nano Research Pub Date : 2024-09-12 DOI: 10.1007/s12274-024-6938-1

Tianbao Zhao, Di Lan, Zirui Jia, Zhenguo Gao, Guanglei Wu

{"title":"Hierarchical porous molybdenum carbide synergic morphological engineering towards broad multi-band tunable microwave absorption","authors":"Tianbao Zhao, Di Lan, Zirui Jia, Zhenguo Gao, Guanglei Wu","doi":"10.1007/s12274-024-6938-1","DOIUrl":"https://doi.org/10.1007/s12274-024-6938-1","url":null,"abstract":"<p>With the accelerating development of electronic technology, how to effectively eliminate electromagnetic radiation pollution has become a critical issue. Electromagnetic wave (EMW) absorption materials have an irreplaceable position in the field of military stealth as well as in the field of electromagnetic pollution control. In order to cope with the complicated electromagnetic environment, the design of multifunctional and multiband high-efficiency EMW absorbers remains a daunting challenge. In this work, a hierarchical porous molybdenum carbide matrix with a three-dimensional porous structure was designed by salt melt synthesis (SMS) strategy. Furthermore, the relationship between the structure and the impedance matching performance was explored by stepwise modification via ultrathin layered MoS<sub>2</sub> nanoflakes. Analysis indicates that the extent of modification of hierarchical porous molybdenum carbide by MoS<sub>2</sub> nanoflakes modulates the dielectric performance due to differences in morphology and the introduction of heterogeneous structures, along with a dramatic impact on the impedance matching performance. In particular, the prepared MS/MC/PNC-2 composite exhibits a reflection loss (RL) of -55.30 dB at 2.4 mm, and an ultra-broad effective absorption bandwidth (EAB) of 7.60 GHz is obtained at 2.0 mm. The coordination of structure and component enables the absorber to exhibit strong absorption, wide bandwidth, thin thickness, and multi-band absorption characteristics. Noticeably, the effective absorption performance in the broadband for X and Ku is also satisfying, as well as possessing moderate marine anti-corrosion performance. This study contributes to an in-depth understanding of the relationship between impedance matching and EMW absorber performance and provides a reference for the design of multifunctional, multiband microwave absorbing materials.\u0000</p>","PeriodicalId":713,"journal":{"name":"Nano Research","volume":"182 1","pages":""},"PeriodicalIF":9.9,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218596","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

On the role of Zn and Fe doping in nitrogen-carbon electrocatalysts for oxygen reduction 氮碳氧还原电催化剂中锌和铁掺杂的作用

IF 9.5 2区材料科学

Nano Research Pub Date : 2024-09-12 DOI: 10.1007/s12274-024-6962-1

Yanan Zou, Yuanyuan Su, Yongchao Yu, Jinliang Luo, Xiaomin Kang, Jun Zhang, Linghan Lan, Tianshi Wang, Jun Li

{"title":"On the role of Zn and Fe doping in nitrogen-carbon electrocatalysts for oxygen reduction","authors":"Yanan Zou, Yuanyuan Su, Yongchao Yu, Jinliang Luo, Xiaomin Kang, Jun Zhang, Linghan Lan, Tianshi Wang, Jun Li","doi":"10.1007/s12274-024-6962-1","DOIUrl":"10.1007/s12274-024-6962-1","url":null,"abstract":"<div><p>Zn is a frequently used and sometimes even an inevitably involved element (when zeolitic imidazolate framework-8 (ZIF-8) is adopted as the precursor) for preparing high-performance Fe-N-C oxygen reduction reaction (ORR) catalysts. However, how the Zn element affects the physicochemical architecture of the catalysts, how it enhances the catalytic activity and whether Zn atoms serve as the active centers remain unclear. Herein, we proposed a novel route that adopted pyrrole as the precursor and flexibly controlled the addition of exogenous Zn and Fe dopants before pyrrole polymerization. In this way, a series of nitrogen-carbon catalysts with or without Zn or Fe doping were synthesized. The detailed characterization revealed the role of Zn and Fe doping in the catalyst morphology, pore structure, active site configurations, ORR catalytic activity and fuel cell performance. Importantly, the findings revealed that Zn doping has little effect on the ORR mechanism and pathway. It enhances ORR activity primarily by increasing the number of active sites via introducing more micro- and meso-pores, rather than by creating new active sites. While Fe doping participated in forming both pores and active site centers. Moreover, the catalyst that co-doped with Zn and Fe atoms (Zn-FeNC), synthesized via this simple and template-free route we proposed, presented a unique hollow and hierarchical pore structure with highly boosted ORR activity. It exhibited a 40 mV higher <i>E</i><sub>1/2</sub> value than Pt/C in alkaline media, along with a rapid current response in air-cathode of the direct formate fuel cell. These results are valuable in guiding the synthesis of high-performance Fe-N-C catalysts.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":713,"journal":{"name":"Nano Research","volume":"17 11","pages":"9564 - 9572"},"PeriodicalIF":9.5,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218590","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