Crystals最新文献_第4页

Tannic Acid-Loaded Antibacterial Hydroxyapatite-Zirconia Composite for Dental Applications. 单宁酸负载抗菌羟基磷灰石-氧化锆复合材料的牙科应用。

IF 2.9 4区材料科学

Crystals Pub Date : 2025-05-01 Epub Date: 2025-04-24 DOI: 10.3390/cryst15050396

Nusrat Yeasmin, Joel Pilli, Julian McWilliams, Sarah Norris, Arjak Bhattacharjee

{"title":"Tannic Acid-Loaded Antibacterial Hydroxyapatite-Zirconia Composite for Dental Applications.","authors":"Nusrat Yeasmin, Joel Pilli, Julian McWilliams, Sarah Norris, Arjak Bhattacharjee","doi":"10.3390/cryst15050396","DOIUrl":"10.3390/cryst15050396","url":null,"abstract":"The development of advanced biomaterials for dental applications has gained significant attention due to the need for enhanced mechanical properties, biocompatibility, and antibacterial activity. Hydroxyapatite (HA) is widely used in bone tissue engineering owing to its chemical similarities to bone. However, biofilm formation and bacterial infection on HA may lead to implant failure and revision surgery. Tannic acid, a polyphenolic compound with strong antibacterial and antioxidant properties, was incorporated into the composite to provide antimicrobial effects, that may address the challenge of biofilm formation on dental surfaces. In this study, the biomedical potential of tannic acid (TA)-loaded hydroxyapatite-zirconia composites were analyzed. The crystallization characteristics, functional groups, and morphology were analyzed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM) analysis. The biocompatibility of composite samples was analyzed through in vitro cell culture studies. The combined effect of TA and zirconia showed antibacterial efficacy against Staphylococcus aureus (S. aureus) after 24 h of sample-bacterial interactions. The results demonstrate that this tannic acid-loaded hydroxyapatite-zirconia composite holds significant promise for improving the performance of dental materials and preventing infections in oral healthcare applications.","PeriodicalId":10855,"journal":{"name":"Crystals","volume":"15 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12872217/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146124193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

¹¹⁹Sn Element-Specific Phonon Density of States of BaSnO₃. 119Sn元素对BaSnO3态声子密度的影响。

IF 2.9 4区材料科学

Crystals Pub Date : 2025-05-01 Epub Date: 2025-05-05 DOI: 10.3390/cryst15050440

Alexey Rulev, Hongxin Wang, Selma Erat, Murat Aycibin, Daniel Rentsch, Vladimir Pomjakushin, Stephen P Cramer, Qianli Chen, Nobumoto Nagasawa, Yoshitaka Yoda, Artur Braun

{"title":"119Sn Element-Specific Phonon Density of States of BaSnO3.","authors":"Alexey Rulev, Hongxin Wang, Selma Erat, Murat Aycibin, Daniel Rentsch, Vladimir Pomjakushin, Stephen P Cramer, Qianli Chen, Nobumoto Nagasawa, Yoshitaka Yoda, Artur Braun","doi":"10.3390/cryst15050440","DOIUrl":"10.3390/cryst15050440","url":null,"abstract":"Vibration spectroscopy is routinely used in analytical chemistry for molecular speciation. Less common is its use in studying the dynamics of reaction and transport processes. A shortcoming of vibration spectroscopies is that they are not inherently specific to chemical elements. Progress in synchrotron radiation-based X-ray technology has developed nuclear resonance vibration spectroscopy (NRVS), which can be used to produce element-specific vibration spectra and partial vibrational density of states (PVDOS), provided the material under investigation contains a Mössbauer-active element. While the method has been recently used successfully for protein spectroscopy, fewer studies have been conducted for condensed matter. We have employed NRVS on the BaSnO3 perovskite structure, which is a model compound for ceramic proton conductors in intermediate temperature fuel cells. Since we used 119Sn as a Mössbauer isotope, the derived experimental PVDOS is specific to the element Sn in BaSnO3. We show how this phonon DOS is used as an experimental anchor for the interpretation of the DFT-calculated PVDOS of BaSnO3.","PeriodicalId":10855,"journal":{"name":"Crystals","volume":"15 5","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13052353/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147632844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Crystal Form Diversity of 2-(4-(Diphenylamino)benzylidene) Malononitrile 2-（4-（二苯基氨基）苄基）丙二腈的晶型多样性

4区材料科学

Crystals Pub Date : 2025-04-21 DOI: 10.3390/cryst15040380

Haorui Gu, Qingwen Lin

{"title":"Crystal Form Diversity of 2-(4-(Diphenylamino)benzylidene) Malononitrile","authors":"Haorui Gu, Qingwen Lin","doi":"10.3390/cryst15040380","DOIUrl":"https://doi.org/10.3390/cryst15040380","url":null,"abstract":"In the present work, we report the synthesis and characterization of 2-(4-(diphenylamino)benzylidene) malononitrile (DPAM) via a piperidine-catalyzed Knoevenagel condensation reaction. Two distinct crystal forms (A-1 and A-2) of this product were obtained by controlling the crystallization conditions, exhibiting orthorhombic and monoclinic crystal systems, respectively. Single-crystal X-ray diffraction revealed that both forms exhibited highly twisted benzene rings, which suppressed exciplex or excimer formation, enhancing luminescence. Crystal A-1, with a higher density, showed stronger hydrogen bonding and more rigid molecular packing, while A-2, with a lower density, exhibited weaker π–π interactions. Both crystals demonstrated high thermal stability. Notably, the A-2 crystal displayed a mechanochromic behavior: grinding or applying pressure induced a structural transformation into A-1, accompanied by a fluorescence shift from red to yellow. This transformation was attributed to increased steric hindrance and changes in molecular packing. This study highlights the relationship between crystal structure and optoelectronic properties, offering insights into the design of organic crystalline materials for applications in pressure sensing, anti-counterfeiting, and information encryption.","PeriodicalId":10855,"journal":{"name":"Crystals","volume":"15 4","pages":"380-380"},"PeriodicalIF":0.0,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2073-4352/15/4/380/pdf?version=1745236258","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147886292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Synthesis of MXene Composites Using Thiourea as a Nitrogen–Sulfur Precursor 以硫脲为氮硫前驱体合成MXene复合材料

4区材料科学

Crystals Pub Date : 2025-04-11 DOI: 10.3390/cryst15040353

Junming Zhang, Yefeng Feng, Junhao Peng, Kaidan Wu, Zuyong Feng, Miao He, Kunhua Wen, Deping Xiong

{"title":"Synthesis of MXene Composites Using Thiourea as a Nitrogen–Sulfur Precursor","authors":"Junming Zhang, Yefeng Feng, Junhao Peng, Kaidan Wu, Zuyong Feng, Miao He, Kunhua Wen, Deping Xiong","doi":"10.3390/cryst15040353","DOIUrl":"https://doi.org/10.3390/cryst15040353","url":null,"abstract":"In potassium ion electrode materials, MXenes have garnered significant attention in the energy storage field due to their high conductivity and complex surface chemistry. In this work, thiourea was used as a nitrogen–sulfur composite precursor, and a self-assembly method was employed to synthesize a material, named nitrogen–sulfur– MXene (NS-MXene). During the reaction, thiourea molecules attach to the surface and interlayers of MXene, increasing the interlayer spacing. Upon heating, thiourea molecules decompose into nitrogen (N) and sulfur (S), which then combine with the MXene material. The N and S provide additional capacity for potassium ion storage, while the increased interlayer spacing also facilitates the intercalation and deintercalation of K+. Use of NS-MXene as anode material for potassium-ion batteries results in a high-rate performance (final capacity of 205.2 mAhg−1 at 0.1 Ag−1), long-term cycling stability (128.5 mAhg−1 at 0.5 Ag−1), and a good specific capacity (141 mAhg−1 at 0.1 Ag−1). This groundbreaking discovery opens the door to investigating MXene-based energy storage materials with superior performance and creates a new standard for MXene derivatives.","PeriodicalId":10855,"journal":{"name":"Crystals","volume":"15 4","pages":"353-353"},"PeriodicalIF":0.0,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2073-4352/15/4/353/pdf?version=1744362769","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147892115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Aqueous Solution Spray Drying Preparations of Binary Amorphous Solid Dispersions 二元非晶固体分散体的水溶液喷雾干燥制备

4区材料科学

Crystals Pub Date : 2025-03-28 DOI: 10.3390/cryst15040323

W. Zheng, Junni Ke, Kaerdun Liu, Rongrong Xue, Fenghua Chen

{"title":"Aqueous Solution Spray Drying Preparations of Binary Amorphous Solid Dispersions","authors":"W. Zheng, Junni Ke, Kaerdun Liu, Rongrong Xue, Fenghua Chen","doi":"10.3390/cryst15040323","DOIUrl":"https://doi.org/10.3390/cryst15040323","url":null,"abstract":"Spray drying of poorly water-soluble drugs in organic solvents is a mature process in the preparation of drugs amorphous solids dispersions (ASDs). The use of organic solvents is under increasing environmental protection and safety pressure and restricts the application of advanced polymers as proteins which are usually insoluble and unstable in organic solvents. Aqueous solution spray drying technology is a candidate method for preparing ASDs without the use of organic solvents. Increasing temperature and adding volatile additives can improve the solubility of poorly water-soluble drugs in water without introducing additional components and energy needed. In this work, ammonia assisted aqueous solution spray drying method was successfully used to prepare various ASDs of indomethacin (25%) with synthetic polymers as polyvinylpyrrolidone and proteins as β-lactoglobulin, lactalbumin hydrolysate, bovine serum albumin, with high yields, special micro golfs morphology, precise compositions and longtime stabilities, compared to high-temperature aqueous solution spray drying method. ASDs with lactalbumin hydrolysate and bovine serum albumin show better dissolution profiles than other ASDs. Aqueous solution spray drying is easily extended to prepare the ASDs of sulfamerazine and celecoxib, providing a possibility to avoid the use of organic solvents in advanced ASDs preparations via spray drying.","PeriodicalId":10855,"journal":{"name":"Crystals","volume":"15 4","pages":"323-323"},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2073-4352/15/4/323/pdf?version=1743156080","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147330752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Zero-Dimensional Organic Amine-Copper Bromide Hybrid Crystal with Highly Efficient Yellow Emission 具有高效黄色发光的零维有机胺-溴化铜杂化晶体

4区材料科学

Crystals Pub Date : 2025-03-27 DOI: 10.3390/cryst15040312

Yanxi Chen, Ye Tian, Tao Huang, Shangfei Yao, Hui Peng, Bingsuo Zou

{"title":"Zero-Dimensional Organic Amine-Copper Bromide Hybrid Crystal with Highly Efficient Yellow Emission","authors":"Yanxi Chen, Ye Tian, Tao Huang, Shangfei Yao, Hui Peng, Bingsuo Zou","doi":"10.3390/cryst15040312","DOIUrl":"https://doi.org/10.3390/cryst15040312","url":null,"abstract":"Recently, Cu(I)-based metal halides have attracted tremendous attention owing to their remarkable photophysical properties. However, most of them can only be excited by near ultraviolet (UV) light at a wavelength (generally less than 350 nm) with a wide bandgap, which undoubtedly limits their application in solid-state lighting due to the low excitation efficiency at about 400 nm in devices. Here, we report a new zero-dimensional organic cuprous bromide of (C13H30N)2Cu5Br7 single crystals, which can be excited by visible light (390–400 nm) and give a bright yellow and broad self-trapped exciton emission band with the photoluminescence quantum yield (PLQY) of 92.3% at room temperature. The experimental and theoretical results show that the existence of Cu-Br-Cu metal bonds in a Cu5Br7 cluster package produces three components of self-trapped excitons (STE) that emit at room temperature but merge into one at 80 K. This occurs because of the anomalously enhanced electron–phonon coupling and electron–electron coupling in the coupled clusters in this system. These effects cause the excitation near visible light and emission broader at higher temperature. Additionally, their remarkable anti-water emission stability was demonstrated even after soaking in water for 6 h. Finally, a highly efficient white-light-emitting diode (WLED) based on (C13H30N)2Cu5Br7 was fabricated.","PeriodicalId":10855,"journal":{"name":"Crystals","volume":"15 4","pages":"312-312"},"PeriodicalIF":0.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2073-4352/15/4/312/pdf?version=1743069146","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147899513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Discrimination of Thermoluminescent Signals from Natural Quartz and Carbonate Crystals Mixture 天然石英和碳酸盐晶体混合物热释光信号的识别

4区材料科学

Crystals Pub Date : 2025-03-26 DOI: 10.3390/cryst15040306

Rosaria Galvagno, Giuseppe Stella, Riccardo Reitano, Anna Maria Gueli

{"title":"Discrimination of Thermoluminescent Signals from Natural Quartz and Carbonate Crystals Mixture","authors":"Rosaria Galvagno, Giuseppe Stella, Riccardo Reitano, Anna Maria Gueli","doi":"10.3390/cryst15040306","DOIUrl":"https://doi.org/10.3390/cryst15040306","url":null,"abstract":"Luminescence techniques, especially thermoluminescence (TL) and optically stimulated luminescence (OSL), are essential for dating materials in Cultural Heritage. TL is effective for dating bricks by determining their last heating event, but brick reuse can introduce inaccuracies. OSL enhances accuracy by dating the last light exposure of quartz grains in mortars, a material that is coeval with the construction of the building. However, partial bleaching of quartz grains can lead to overestimated ages. A promising solution involves dating the carbonate fraction of mortars, as calcium carbonate experiences bleaching during mortar preparation. This study investigates the feasibility of isolating signals from quartz and calcite in a composite material. Initially, TL signals for quartz and calcite were characterized separately. A laboratory mixture, comprising 75% quartz and 25% calcite, was irradiated to simulate partial bleaching. TL curve deconvolution revealed distinct peaks: quartz displayed four peaks, while calcite had three, notably lacking a low-temperature peak. The mixed sample exhibited peaks at 527 K, 573 K, 618 K, and 690 K, with the first peak being exclusively quartz, the second primarily quartz with minor calcite, and the third showing contributions from both. Dose-response curves indicated that the quartz peaks aligned with the expected 41.40 Gy dose, and the calcite signal matched 10.40 Gy. This confirms the feasibility of separating TL signals from quartz and calcite in mixed samples, offering a potential method for accurately dating the carbonate fraction in mortars and addressing partial bleaching issues. Future work will focus on optimizing detection parameters and applying this method to historically significant mortars to assess its effectiveness.","PeriodicalId":10855,"journal":{"name":"Crystals","volume":"15 4","pages":"306-306"},"PeriodicalIF":0.0,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2073-4352/15/4/306/pdf?version=1742974551","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147886129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Tb3+-Doped LGS Crystals: Crystal Growth and Electro-Elastic Features Tb3+掺杂LGS晶体：晶体生长和电弹性特性

4区材料科学

Crystals Pub Date : 2025-03-13 DOI: 10.3390/cryst15030269

Nianlong Zhang, Jipeng Wu, Hengyuan Zhang, Feifei Chen, Fapeng Yu, Li Sun, Xian Zhao

{"title":"Tb3+-Doped LGS Crystals: Crystal Growth and Electro-Elastic Features","authors":"Nianlong Zhang, Jipeng Wu, Hengyuan Zhang, Feifei Chen, Fapeng Yu, Li Sun, Xian Zhao","doi":"10.3390/cryst15030269","DOIUrl":"https://doi.org/10.3390/cryst15030269","url":null,"abstract":"Piezoelectric materials have garnered significant attention due to their diverse applications in technologies such as sensors, actuators, and energy-harvesting systems. This study focuses on the growth and characterization of Tb3+-doped La3Ga5SiO14 (LGS) crystals. A novel 10% Tb3+-doped single LGS crystal was successfully grown using the Czochralski method. The crystal structure and fluorescence properties were determined, and the electro-elastic properties were evaluated by the impedance method, which assessed dielectric, piezoelectric, and elastic constants. The Tb3+-doped crystal was observed to crystallize in the trigonal system, with the concentration of the Tb3+ ion in the crystal determined to be 2.50 wt%. The piezoelectric coefficients were measured as d11 = 5.41 pC/N and d14 = −5.52 pC/N, and the dielectric constants were found to be 19.60 and 52.75, respectively. The temperature-dependent behavior of Tb:LGS crystals was investigated, particularly concerning their elastic constants, demonstrating favorable thermal stability. This study provides valuable insights into the relationship between the crystals’ structural characteristics and performance. Additionally, the fluorescence properties were measured; a long lifetime (τ = 1.655 ms) indicated the potential applications of Tb:LGS crystals in laser technology.","PeriodicalId":10855,"journal":{"name":"Crystals","volume":"15 3","pages":"269-269"},"PeriodicalIF":0.0,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2073-4352/15/3/269/pdf?version=1741872896","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147900313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Design and Application of Hollow Flower-like Trimetallic Nanocrystals in Real-Time Catalytic Process Analysis 空心花状三金属纳米晶在实时催化过程分析中的设计与应用

4区材料科学

Crystals Pub Date : 2025-03-06 DOI: 10.3390/cryst15030246

Yazhou Qin, Jiahao Teng, Han Zhang, Fan Li, Yingsheng He

{"title":"Design and Application of Hollow Flower-like Trimetallic Nanocrystals in Real-Time Catalytic Process Analysis","authors":"Yazhou Qin, Jiahao Teng, Han Zhang, Fan Li, Yingsheng He","doi":"10.3390/cryst15030246","DOIUrl":"https://doi.org/10.3390/cryst15030246","url":null,"abstract":"Hollow flower-like multi-metallic nanocrystals have attracted significant research attention due to their exceptional catalytic properties, which stem from their high surface area-to-volume ratio and abundant active sites. Nevertheless, conventional synthesis methods for noble metal nanocrystals typically involve complex procedures or require harsh reaction conditions. In this work, we developed a facile and environmentally benign strategy for fabricating hollow flower-shaped trimetallic nanocrystals at ambient temperature. Our approach employs AgCl nanocubes, derived from AgNO3 and HAuCl4, as self-sacrificing templates. Through ascorbic acid-mediated reduction of metal precursors, we successfully synthesized three distinct types of hollow flower-like nanocrystals: AuAgCu, AuAgPt, and AuAgPd. Comprehensive characterization confirmed the well-defined morphology and precise composition control of the as-prepared nanocrystals. The catalytic performance was systematically evaluated through in situ UV–vis spectroscopy monitoring of 4-nitrophenylthiophenol reduction, revealing the following activity trend: AuAgCu > AuAgPt > AuAgPd. This study not only provides a versatile platform for constructing sophisticated multi-metallic nanostructures but also offers valuable insights into the structure–activity relationship of complex catalysts.","PeriodicalId":10855,"journal":{"name":"Crystals","volume":"15 3","pages":"246-246"},"PeriodicalIF":0.0,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2073-4352/15/3/246/pdf?version=1741233056","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147888344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

In Situ Observation of Redox Dynamics and Surface Restructuring on Pt/CeO2 Catalysts Pt/CeO2催化剂氧化还原动力学和表面重构的原位观察

4区材料科学

Crystals Pub Date : 2025-02-24 DOI: 10.3390/cryst15030215

Yu‐Ye Li, Jianyu Cao, Zhongshi Zhang, Jing Xia, Xiangmin Meng

{"title":"In Situ Observation of Redox Dynamics and Surface Restructuring on Pt/CeO2 Catalysts","authors":"Yu‐Ye Li, Jianyu Cao, Zhongshi Zhang, Jing Xia, Xiangmin Meng","doi":"10.3390/cryst15030215","DOIUrl":"https://doi.org/10.3390/cryst15030215","url":null,"abstract":"Heterogeneous catalysis has significant applications in energy conversion, chemical production, and environmental treatment. Among them, the supported catalyst Pt/CeO2 has attracted much attention due to its high catalytic activity and stability. While the particle size of the catalyst strongly influences its performance, the dynamic behavior and the underlying mechanism of the particle size effect under realistic reactions have not been fully clarified. Using in situ transmission electron microscopy and mass spectrometry, we systematically investigated the size-dependent surface restructuring of Pt nanoparticles supported on CeO2 in high-temperature redox environments. Larger Pt nanoparticles exhibited significant surface fluctuations during oxidation, which could be reconstructed under reducing conditions, with a slight rotation after the reaction cycle. In contrast, smaller Pt particles demonstrated greater stability, maintaining a constant size after the reaction while their surface structures continuously restructured into low-index crystal planes during oxidation. Mass spectrometry revealed water production during the catalytic process, highlighting a correlation between surface restructuring and reactivity. These findings advance the understanding of redox dynamics in noble metal catalysts and provide a theoretical basis for the design of more efficient and stable catalytic systems.","PeriodicalId":10855,"journal":{"name":"Crystals","volume":"15 3","pages":"215-215"},"PeriodicalIF":0.0,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2073-4352/15/3/215/pdf?version=1740391713","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147334038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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