Advanced Powder Materials最新文献

Accelerated sintering and microstructural regulation of tungsten powder compact by novel modulation of particle configuration 新型粒子结构调制对钨粉致密体的加速烧结及微观结构的调控

Advanced Powder Materials Pub Date : 2025-06-24 DOI: 10.1016/j.apmate.2025.100317

Peng Hu , Yijie Gao , Hexiong Liu , Yunfei Yang , Qinqin Zhou , Jung-Sik Kim , Yaowu Hao , Jinshu Wang

{"title":"Accelerated sintering and microstructural regulation of tungsten powder compact by novel modulation of particle configuration","authors":"Peng Hu , Yijie Gao , Hexiong Liu , Yunfei Yang , Qinqin Zhou , Jung-Sik Kim , Yaowu Hao , Jinshu Wang","doi":"10.1016/j.apmate.2025.100317","DOIUrl":"10.1016/j.apmate.2025.100317","url":null,"abstract":"<div><div>Increasing the sintering rate of powder compact is a critical challenge of powder metallurgical materials, and adjusting component distribution in particles aggregate present significant effect on the microstructure of sintered product, especially for multi-phase compact with local heterogeneity. Here, a case study of W–Ni–Co powder compact was adopted to illustrate the novel strategy to enhance the sintering of multi-phase compact with desired microstructure by adjusting the particle configurations. The plasma synthesis route was developed for the first time to independently adjust the configurations of W–Ni–Co nanopowders with core-shell and homogeneous structures, which facilitates to ascertain the sintering response induced exclusively by particle configurations. Comparison on sintering response further indicates that core-shell powder presents greatly promoted sintering than homogeneous one, and full-dense and uniform compact with grain size of 1.37 μm was obtained by solid sintering, which is several to dozens of times smaller than that obtained by conventional liquid sintering. Theoretical and experimental Investigation on elemental immigration visualized the distinct mass diffusion behavior of powder compacts, and clarified the mass transport path promoted densification mechanism determined by powder configurations. Importantly, full-coherent phase interface induced superior strength and plasticity in alloy sintered using core-shell powder, which highlights the importance of microstructural regulation on improving the mechanical property that superior than most of previously reported tungsten heavy alloys. In summary, this work paves a new way for fast sintering of multi-phase compacts, and provides intrinsic understandings on densification mechanism of powder compact.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"4 5","pages":"Article 100317"},"PeriodicalIF":0.0,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-loading inducing Fe-dimer on carbon nitride promotes the generation of ·O2− 氮化碳上高负荷诱导铁二聚体促进了·O2−的生成

Advanced Powder Materials Pub Date : 2025-06-18 DOI: 10.1016/j.apmate.2025.100308

Xinran Zheng , Yuchao Wang , Jianping Guan , Xu Liu , Yu Bai , Yingbi Chen , Peiyao Yang , Jing Zhang , Houzheng Ou , Meng Wang , Yu Xiong , Haozhi Wang , Yongpeng Lei

{"title":"High-loading inducing Fe-dimer on carbon nitride promotes the generation of ·O2−","authors":"Xinran Zheng , Yuchao Wang , Jianping Guan , Xu Liu , Yu Bai , Yingbi Chen , Peiyao Yang , Jing Zhang , Houzheng Ou , Meng Wang , Yu Xiong , Haozhi Wang , Yongpeng Lei","doi":"10.1016/j.apmate.2025.100308","DOIUrl":"10.1016/j.apmate.2025.100308","url":null,"abstract":"<div><div>The research on metal dimer clusters is of great importance, owing to the potential in modulating the adsorption behavior towards reaction intermediates. Here, we develop a loading heightening strategy to obtain a 32.5 wt% Fe-dimer catalyst (Fe-32.5). The co-anchoring of two Fe atoms in a single triazine ring of carbon nitride with an atomic spacing of ∼0.23 nm is proved. Fe atoms occupy the pores of the triazine ring in the lower iron content sample (Fe-12.9 and Fe-17.1). However, with the increase of iron content to 32.5 wt%, two Fe atoms simultaneously occupy one triazine ring. For Fe-32.5, besides the main peak located at ∼1.5 Å corresponding to the Fe–N interaction, a peak attributed to Fe–Fe bonding is observed at ∼2.2 Å in Fourier-transformed k<sup>3</sup>-weithted extended X-ray absorption fine structure. Density functional theoretical calculations reveal that Fe-dimer in Fe-32.5 induces a charge redistribution compared with that in Fe-12.9 and Fe-17.1. H<sub>2</sub>O∗ is adsorbed on O∗ via hydrogen bonding in Fe-12.9 and Fe-17.1. However, H<sub>2</sub>O∗and O∗ in Fe-32.5 are adsorbed on Fe–Fe dimer, resulting in a decrease in the total energy of the reaction process. For the two former, O<sub>2</sub><sup>−</sup>∗ adsorbs on individual Fe atoms. Fe-dimer in Fe-32.5 adsorbs O<sub>2</sub><sup>−</sup>∗ in the form of bridge bonds, which facilitates the ·O<sub>2</sub><sup>−</sup> release. Furthermore, an enhanced affinity for the substrate 3,3′,5,5′-tetramethylbenzidine and higher peroxidase-like activity were displayed. This work provides an effective mean to synthesize metal dimer clusters through high loading.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"4 5","pages":"Article 100308"},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rare earth-rich sublayer tuned Pd-skin for methanol and CO tolerance oxygen reduction and hydrogen oxidation reaction 富稀土亚层调谐Pd-skin用于甲醇和CO耐受氧还原和氢氧化反应

Advanced Powder Materials Pub Date : 2025-06-14 DOI: 10.1016/j.apmate.2025.100305

Felix Kwofie , Jinfan Chen , Yujing Liu , Ying Zhang , Junsong Zhang , Yang Yang , Quentin Meyer , Chuan Zhao , Zhenjiang He , Yunjiao Li , Yi Cheng

{"title":"Rare earth-rich sublayer tuned Pd-skin for methanol and CO tolerance oxygen reduction and hydrogen oxidation reaction","authors":"Felix Kwofie , Jinfan Chen , Yujing Liu , Ying Zhang , Junsong Zhang , Yang Yang , Quentin Meyer , Chuan Zhao , Zhenjiang He , Yunjiao Li , Yi Cheng","doi":"10.1016/j.apmate.2025.100305","DOIUrl":"10.1016/j.apmate.2025.100305","url":null,"abstract":"<div><div>Storing hydrogen in green methanol is a well-known and cost-effective way for long-term energy storage. However, using green methanol in fuel cell technologies requires electrocatalysts with superior resistance to poisoning induced by intermediate species. This study introduces a new class of palladium-based rare earth (RE) alloys with exceptional resistance to methanol for the oxygen reduction reaction (ORR) and outstanding resistance to carbon monoxide poisoning for the hydrogen oxidation reaction (HOR). The PdEr catalyst achieved unparalleled ORR activity amongst the Pd-based rare earth alloys and demonstrated remarkable resistance to methanol poisoning, which is two orders of magnitude higher than commercial Pt/C catalysts. Furthermore, the PdEr catalyst shows high hydrogen oxidation activity under 100 ppm CO. Comprehensive analysis demonstrates that the RE element-enriched sublayer tuning of the Pd-skin's surface strain is responsible for the enhanced ORR and HOR capabilities. This modification allows for precise control over the adsorption strength of critical intermediates while concurrently diminishing the adsorption energy of methanol and CO on the PdEr surface.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"4 4","pages":"Article 100305"},"PeriodicalIF":0.0,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advancements in flexible Perovskite solar cells and their integration into self-powered wearable optoelectronic systems 柔性钙钛矿太阳能电池及其与自供电可穿戴光电系统集成的进展

Advanced Powder Materials Pub Date : 2025-05-27 DOI: 10.1016/j.apmate.2025.100304

Ghazanfar Nazir , Adeela Rehman , Jagadis Gautam , Muhammad Ikram , Sajjad Hussain , Sikandar Aftab , Kwang Heo , Seul-Yi Lee , Soo-Jin Park

{"title":"Advancements in flexible Perovskite solar cells and their integration into self-powered wearable optoelectronic systems","authors":"Ghazanfar Nazir , Adeela Rehman , Jagadis Gautam , Muhammad Ikram , Sajjad Hussain , Sikandar Aftab , Kwang Heo , Seul-Yi Lee , Soo-Jin Park","doi":"10.1016/j.apmate.2025.100304","DOIUrl":"10.1016/j.apmate.2025.100304","url":null,"abstract":"<div><div>Driven by rapid advancements in smart wearable technologies and perovskite photovoltaics, flexible perovskite solar cells (FPSCs) have emerged as highly promising autonomous power sources, poised to transform the next generation of mobile energy systems, portable electronics, and integrated wearable devices. For successful deployment in real-world scenarios, FPSCs must exhibit a combination of key attributes, including high power conversion efficiency, lightweight architecture, environmental robustness, and mechanical adaptability—encompassing flexibility, stretchability, and twistability. This review provides a detailed examination of the evolution, current state, and practical deployment of FPSCs, emphasizing their potential as efficient, portable energy solutions. It investigates advanced strategies for improving environmental resilience and mechanical recoverability, including the engineering of flexible substrates, deposition of high-quality perovskite films, and optimization of charge-selective interfaces. Additionally, it offers a systematic analysis of device design, fabrication protocols, scalable printing techniques, and standardized performance evaluation methods tailored for wearable FPSCs. Recent progress in enhancing the optoelectronic properties and mechanical durability of FPSCs is also critically reviewed. Ultimately, this work delivers a comprehensive perspective on FPSCs from both optoelectronic and mechanical viewpoints, identifies key challenges, and outlines future research pathways toward the seamless integration of FPSCs into multifunctional, next-generation wearable systems.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"4 4","pages":"Article 100304"},"PeriodicalIF":0.0,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electronic structure regulation inducing robust solid electrolyte interphase for stable anode-free sodium metal batteries 稳定无阳极钠金属电池中诱导坚固固体电解质界面的电子结构调控

Advanced Powder Materials Pub Date : 2025-05-19 DOI: 10.1016/j.apmate.2025.100303

Peng Xu , Yinghan Liu , Mulan Qin , Fei Huang , Shuquan Liang , Guozhao Fang

{"title":"Electronic structure regulation inducing robust solid electrolyte interphase for stable anode-free sodium metal batteries","authors":"Peng Xu , Yinghan Liu , Mulan Qin , Fei Huang , Shuquan Liang , Guozhao Fang","doi":"10.1016/j.apmate.2025.100303","DOIUrl":"10.1016/j.apmate.2025.100303","url":null,"abstract":"<div><div>Anode-free sodium metal batteries (AFSMBs) have gained attention as next-generation storage systems with high energy density and cost-effectiveness. However, non-uniform sodium (Na) deposition and an unsteady solid electrolyte interphase (SEI) lead to dendrite-related issues and severe irreversible Na<sup>+</sup> plating/stripping, greatly aggravating their cycle deterioration. In this study, we effectively modified the 3D current collector's electronic structure by introducing Zn-N<sub><em>x</em></sub> active sites (Zn-CNF), which enhances lateral Na<sup>+</sup> diffusion and the Na planar growth, enabling uniform deep Na deposition at an exceptionally high capacity of 10 mA h cm<sup>−2</sup>. Furthermore, the Zn-N<sub><em>x</em></sub> bonds enhance the adsorption capacity of PF<sub>6</sub><sup>−</sup> and contribute to forming a stable inorganic-rich SEI layer. Consequently, Zn-CNF with the electronic structure regulation endows an ultra-low nucleation overpotential (8 mV) and ultra-high Coulombic efficiency of 99.94% over 1,600 cycles. Symmetric cells demonstrate stable Na<sup>+</sup> plating/stripping behavior for more than 4,400 h at 1 mA cm<sup>−2</sup>. Moreover, under high cathode loading (7.97 mg cm<sup>−2</sup>), the AFSMBs achieve a high energy density of 374 W h kg<sup>−1</sup> and retain a high discharge capacity of 82.49 mA h g<sup>−1</sup> with a capacity retention of 80.4% after 120 cycles. This work proposes a viable strategy to achieving high-energy-density AFSMBs.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"4 4","pages":"Article 100303"},"PeriodicalIF":0.0,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144167033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing dipole polarization loss in conjugated metal-organic frameworks via coordination symmetry breaking under electromagnetic field 电磁场下配位对称性破缺增强共轭金属有机骨架中偶极子极化损耗

Advanced Powder Materials Pub Date : 2025-05-19 DOI: 10.1016/j.apmate.2025.100302

Weize Wang , Rong Liu , Jiaqi Tao , Tinglei Yu , Yijie Liu , Lvtong Duan , Zifu Zhang , Zhihao He , Shuang Chen , Jintang Zhou , Ping Chen , Peijiang Liu , Zhengjun Yao

{"title":"Enhancing dipole polarization loss in conjugated metal-organic frameworks via coordination symmetry breaking under electromagnetic field","authors":"Weize Wang , Rong Liu , Jiaqi Tao , Tinglei Yu , Yijie Liu , Lvtong Duan , Zifu Zhang , Zhihao He , Shuang Chen , Jintang Zhou , Ping Chen , Peijiang Liu , Zhengjun Yao","doi":"10.1016/j.apmate.2025.100302","DOIUrl":"10.1016/j.apmate.2025.100302","url":null,"abstract":"<div><div>Modulating the dipole polarization loss in the single-atom region and establishing its direct relationship with the electromagnetic wave absorption (EWA) performance remain an unmet challenge. Here, a dual-ligand modulation strategy, i.e., partially changing coordination atoms in the single-metal region (sMr), is introduced to effectively break the coordination symmetry of conjugated metal-organic frameworks (cMOFs), finally enhancing EWA property of cMOFs materials. Further, the asymmetrical sMr is experimentally found to elicit the dipole polarization loss, overcoming the handicaps of other electromagnetic wave loss mechanisms, which directly contribution to enhance EWA performance of this series of cMOFs. This strategy is further confirmed by replacing metal centers. Among studied series of cMOFs, Cu<sub>2.25</sub>/Co<sub>0.75</sub>(HHTP<sub>1.67</sub>HITP<sub>0.33</sub>) achieves excellent EWA performance with an effective absorption bandwidth of 5.00 GHz and a reflection loss of −66.03 dB. We introduce a dual-ligand modulation strategy targeting single-metal regions within cMOFs here, aiming to achieve superior EWA performance through atomic-scale dipole polarization loss modulation. We hope our study can inspire more exploration to realize high-performance EWA materials.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"4 4","pages":"Article 100302"},"PeriodicalIF":0.0,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 on high-precision construction of nanoarchitectured SERS substrates for ultrasensitive bio-medical sensors 超灵敏生物医学传感器用纳米结构SERS基板的高精度构建研究进展

Advanced Powder Materials Pub Date : 2025-05-15 DOI: 10.1016/j.apmate.2025.100300

Heguang Liu , Ben Mou , Jinxin Li , Na Tian , Yiming Feng , Xiaodong Cui , Yury Kapitonov , Huageng Liang , Caiyin You , Yuan Li , Tianyou Zhai

{"title":"Recent progress on high-precision construction of nanoarchitectured SERS substrates for ultrasensitive bio-medical sensors","authors":"Heguang Liu , Ben Mou , Jinxin Li , Na Tian , Yiming Feng , Xiaodong Cui , Yury Kapitonov , Huageng Liang , Caiyin You , Yuan Li , Tianyou Zhai","doi":"10.1016/j.apmate.2025.100300","DOIUrl":"10.1016/j.apmate.2025.100300","url":null,"abstract":"<div><div>Surface-enhanced Raman spectroscopy (SERS) has evolved from a laboratory technique to a practical tool for ultra-sensitive detection, particularly in the biomedical field, where precise molecular identification is crucial. Despite significant advancements, a gap remains in the literature, as no comprehensive review systematically addresses the high-precision construction of SERS substrates for ultrasensitive biomedical detection. This review fills that gap by exploring recent progress in fabricating high-precision SERS substrates, emphasizing their role in enabling ultrasensitive bio-medical sensors. We carefully examine the key to these advancements is the precision engineering of substrates, including noble metals, semiconductors, carbon-based materials, and two-dimensional materials, which is essential for achieving the high sensitivity required for ultrasensitive detection. Applications in biomedical diagnostics and molecular analysis are highlighted. Finally, we address the challenges in SERS substrate preparation and outline future directions, focusing on improvement strategies, design concepts, and expanding applications for these advanced materials.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"4 4","pages":"Article 100300"},"PeriodicalIF":0.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrating luminescence with triboelectricity: Meticulously designed hybrid nanogenerator for multipurpose applications 集成发光与摩擦电：精心设计的混合纳米发电机多用途应用

Advanced Powder Materials Pub Date : 2025-05-15 DOI: 10.1016/j.apmate.2025.100301

Mandar Vasant Paranjape , Punnarao Manchi , Harishkumarreddy Patnam , Anand Kurakula , Venkata Siva Kavarthapu , Jae Su Yu

{"title":"Integrating luminescence with triboelectricity: Meticulously designed hybrid nanogenerator for multipurpose applications","authors":"Mandar Vasant Paranjape , Punnarao Manchi , Harishkumarreddy Patnam , Anand Kurakula , Venkata Siva Kavarthapu , Jae Su Yu","doi":"10.1016/j.apmate.2025.100301","DOIUrl":"10.1016/j.apmate.2025.100301","url":null,"abstract":"<div><div>A seamless combination of mechanical energy-harvesting triboelectric nanogenerators with other technologies is the key to widening their applicability. Combining luminescent and triboelectric materials can develop hybrid nanogenerators (HNGs) which can be utilized for energy-harvesting, optical thermometry, and lighting applications. In this study, we designed an Er<sup>3+</sup> and Eu<sup>3+</sup> co-doped Sr<sub>1.85</sub>Ca<sub>0.15</sub>NaNb<sub>5</sub>O<sub>15</sub> (SCNNO:EE) green-yellow-emitting phosphor with excellent temperature-sensing capabilities. SCNNO:EE possessed a high dielectric constant and was thus utilized as a filler inside the polydimethylsiloxane polymer to fabricate composite films. The composite films were employed to fabricate various HNG devices and the filler concentration was optimized to attain the highest electrical output of 170 V, 5.05 μA, and 75 μC/m<sup>2</sup>. The piezoelectric-structured energy-harvesting device (PSEHD) was fabricated and further modified to fabricate a self-activated PSEHD (SAPSEHD) for solid-state lighting applications. Different engraved aluminum electrodes were attached to the composite films to obtain different glowing words and patterns. The electrical signals generated by the PSEHD, when the pressure was applied, were fed into the processing unit, which further flowing into the SAPSEHD. The SAPSEHD can generate electrical signals when pressure is applied and automatically produce light by activating the phosphor in the composite film. This type of devices could attract attention at the places where pressure-activated automatic lighting is required. Also, owing to the promising properties of the proposed devices, they can be utilized for various applications on a large scale.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"4 4","pages":"Article 100301"},"PeriodicalIF":0.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single bond regulated 1O2 and ‧O2− selective generation of heptazine-based conjugated polymers for high-selectivity photocatalysis 单键调控的1O2和·O2−选择性生成用于高选择性光催化的七嗪基共轭聚合物

Advanced Powder Materials Pub Date : 2025-05-03 DOI: 10.1016/j.apmate.2025.100299

Guobang Li , Mengkai Wang , Dan Yang , Ziwen Yu , Tianyu Qiu , Tonghui Wang , Qing Jiang , Yangguang Li , Huaqiao Tan

{"title":"Single bond regulated 1O2 and ‧O2− selective generation of heptazine-based conjugated polymers for high-selectivity photocatalysis","authors":"Guobang Li , Mengkai Wang , Dan Yang , Ziwen Yu , Tianyu Qiu , Tonghui Wang , Qing Jiang , Yangguang Li , Huaqiao Tan","doi":"10.1016/j.apmate.2025.100299","DOIUrl":"10.1016/j.apmate.2025.100299","url":null,"abstract":"<div><div>In conjugated polymers (CPs) photocatalytic system, the generation of reactive oxygen species (ROS) is regulated by cross-scale factors involving active site, excitonic behavior, and O<sub>2</sub> activation process on the surface. However, research on exploring the domino effect of “structure → excitonic behavior → O<sub>2</sub> activation → photocatalytic reaction” through structural modification at the atomic scale remains at its early stages. Herein, two heptazine-based CPs, CP-DPA, and CP-CZ were successfully prepared by polymerization of precursors formed by reacting diphenylamine (DPA) and carbazole (CZ) with cyameluric chloride, respectively. The minute difference in single bond between DPA and CZ endows the polymers with distinct physicochemical properties. Owing to the rotation between benzene rings, CP-DPA exhibits relatively lower conjugation, resulting in increased exciton binding energy (<em>E</em><sub>b</sub>) and inhibited exciton dissociation. Meanwhile, its more triplet state excitons facilitate energy transfer to generate singlet oxygen. Therefore, CP-DPA shows excellent activity for phenylboronic acid oxidation. Conversely, CP-CZ possesses relatively higher conjugation, minimal <em>E</em><sub>b</sub> and intensified exciton dissociation, which promotes charge transfer to produce superoxide radical. Consequently, CP-CZ displays optimal activity for phenylacetylene oxidation and [3 + 2] cycloaddition. This work provides new insights into regulating ROS generation by modulating the composition and structure of photocatalysts at the atomic scale.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"4 4","pages":"Article 100299"},"PeriodicalIF":0.0,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Honeycomb-like single-atom catalysts with FeN3Cl sites for high-performance oxygen reduction 具有FeN3Cl位的蜂窝状单原子催化剂用于高性能氧还原

Advanced Powder Materials Pub Date : 2025-04-30 DOI: 10.1016/j.apmate.2025.100298

Jinfeng Xu , Yu Meng , Xiaoyi Qiu , Hong Zhong , Shaokang Liu , Lili Zhang , Jiayang Zhang , Pengxiang Hou , Scott P. Beckman , Feng Wu , Chang Liu , Minhua Shao , Jincheng Li

{"title":"Honeycomb-like single-atom catalysts with FeN3Cl sites for high-performance oxygen reduction","authors":"Jinfeng Xu , Yu Meng , Xiaoyi Qiu , Hong Zhong , Shaokang Liu , Lili Zhang , Jiayang Zhang , Pengxiang Hou , Scott P. Beckman , Feng Wu , Chang Liu , Minhua Shao , Jincheng Li","doi":"10.1016/j.apmate.2025.100298","DOIUrl":"10.1016/j.apmate.2025.100298","url":null,"abstract":"<div><div>The great interest of Fe-N/C based Zn-air batteries and fuel cells intrigues large numbers of studies on modulating the pore structure for fast mass transport and the electronic structure of atomic Fe centers for enhancing intrinsic activity for oxygen reduction reaction (ORR). A Zn-assisted strategy herein is developed to synthesize a honeycomb-like micro-nanoscale porous Fe-N/C catalyst with atomic FeN<sub>3</sub>Cl active sites. Specifically, Zn-guided synthesis of honeycomb-like porous carbon supported ZnO, ZnO-templated assembly of hemin modified ZIF-8 on honeycomb-like carbon and Zn/ZnO-assisted pyrolysis of the ZIF-8 precursor are involved. The synthetic mechanism is revealed by <em>in-situ</em> transmission electron microscopy imaging and <em>in-situ</em> X-ray diffraction analysis. Density functional theory calculations demonstrate FeN<sub>3</sub>Cl can prominently lower the ORR energy barrier on the Fe centers, greatly facilitating catalytic kinetics. Hence, high ORR performance, including half-wave potentials of 0.81 V in acidic conditions and 0.91 V under alkaline media, is achieved. Besides, Zn-air batteries and H<sub>2</sub>-O<sub>2</sub> fuel cells base on the resulting catalyst are investigated, also exhibiting excellent battery/cell performances. This study provides a novel strategy for the preparation of honeycomb-like micro-nanoscale porous single-atom catalysts as well as a significant new insight on the catalytic mechanisms, helping to advance in energy devices.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"4 4","pages":"Article 100298"},"PeriodicalIF":0.0,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144155021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0