ACS Applied Nano Materials最新文献

{"title":"Dual-Blocked Immune Checkpoint-Engineered Nanocarriers Combined with Photodynamic Therapy To Enhance Immunotherapy of Breast Cancer","authors":"Jie Li,&nbsp;Yufeng Gu,&nbsp;Wenwen Sun,&nbsp;Baoyu Wen,&nbsp;Bin Li,&nbsp;Jie Liu,&nbsp;Zhihong Sun,&nbsp;Qi Zhao* and Chengming Sun*,&nbsp;","doi":"10.1021/acsanm.4c0546510.1021/acsanm.4c05465","DOIUrl":"https://doi.org/10.1021/acsanm.4c05465https://doi.org/10.1021/acsanm.4c05465","url":null,"abstract":"<p >Triple-negative breast cancer (TNBC) poses a significant challenge owing to its complex pathological features and treatment resistance. In recent years, immune checkpoint blockade (ICB) therapy has shown satisfactory results in the treatment of TNBC. ICB therapy targeting T cells’ inhibitory receptors and innate immune checkpoints has gradually become a research hotspot. However, a study has found that compared with single immune checkpoint inhibition, dual ICB has a more significant therapeutic effect. This study aimed to develop an engineered nanocarrier, aLS@VpNPs, loaded with the photosensitizer verteporfin and coated with TNBC cell membranes loaded with antilymphocyte activation gene-3 (anti-LAG3) and sialic acid binding immunoglobulin-like lectin 10 (Siglec10) proteins for delivering combination therapies. The biomimetic vector can mimic the surface characteristics of tumor cells, showing better biocompatibility and efficient tumor-targeting ability. Under photodynamic therapy (PDT), reactive oxygen species (ROS) are generated at the tumor site to directly kill cancer cells and induce immunogenic cell death, transforming “cold tumors” into “hot tumors” and further enhancing the efficacy of dual ICB targeting T cells and macrophages. In summary, this approach improves drug delivery efficiency and therapeutic precision and activates the host immune system through the synergistic mechanisms of PDT and ICB. In addition, the study reveals potential mechanisms for the combined therapy in modulating the tumor microenvironment, offering effective strategies and directions for TNBC treatment.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27476–27488 27476–27488"},"PeriodicalIF":5.3,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142850551","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}

{"title":"AC Magnetometry Using Nano-ferrofluid Cladded Multimode Interferometric Fiber Optic Sensors for Power Grid Monitoring Applications","authors":"Dolendra Karki*,&nbsp;Tulika Khanikar,&nbsp;Suraj V. Mullurkara,&nbsp;Khurram Naeem,&nbsp;Jun Young Hong and Paul Ohodnicki,&nbsp;","doi":"10.1021/acsanm.4c0491210.1021/acsanm.4c04912","DOIUrl":"https://doi.org/10.1021/acsanm.4c04912https://doi.org/10.1021/acsanm.4c04912","url":null,"abstract":"<p >The AC magnetic field response of the superparamagnetic nano-ferrofluid is an interplay between the Neel and Brownian relaxation processes and is generally quantified via the susceptibility measurements at high frequencies. The high frequency limit is dictated by these relaxation times which need to be shorter than the time scale of the time varying magnetic field for the nano-ferrofluid to be considered in an equilibrium state at each time instant. Even though the high frequency response of ferrofluid has been extensively investigated for frequencies up to GHz range by non-optical methods, harnessing dynamic response by optical means for AC magnetic field sensing in fiber-optic-based sensors-field remains unexplored. Instead, the incorporation of nano-ferrofluid as sensing materials has been only limited to DC magnetic field sensing, often citing their long response time as a limiting factor to AC field sensing. This work reports the finding of high frequency (up to 15 kHz) AC magnetic field sensing capability of nanomagnetic fluid as the cladding material of a fiber-optic multimode interferometry (MMI) structure optimized for the fourth self-imaging spectral response. The key parameter enabling high frequency response is the short response time (&lt;1 ms) achieved by optimizing both the sensing structure and nano-ferrofluid solution. Focus has been imparted on 60 Hz line-frequency profiles of various current/magnetic fields to test the efficacy of these sensors in metering and monitoring current and current-induced magnetic fields in the electrical power grid systems. The magnetic field sensitivity of 240 mV/Gauss per dBm of transmitted power was achieved for 60 Hz field applied via Helmholtz coil, whereas the 60 Hz AC current sensitivity of 2.83 mV/A was measured due to magnetic field induced by current in a straight conducting wire.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"26894–26906 26894–26906"},"PeriodicalIF":5.3,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsanm.4c04912","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142850989","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}

{"title":"AC Magnetometry Using Nano-ferrofluid Cladded Multimode Interferometric Fiber Optic Sensors for Power Grid Monitoring Applications.","authors":"Dolendra Karki, Tulika Khanikar, Suraj V Mullurkara, Khurram Naeem, Jun Young Hong, Paul Ohodnicki","doi":"10.1021/acsanm.4c04912","DOIUrl":"10.1021/acsanm.4c04912","url":null,"abstract":"<p><p>The AC magnetic field response of the superparamagnetic nano-ferrofluid is an interplay between the Neel and Brownian relaxation processes and is generally quantified via the susceptibility measurements at high frequencies. The high frequency limit is dictated by these relaxation times which need to be shorter than the time scale of the time varying magnetic field for the nano-ferrofluid to be considered in an equilibrium state at each time instant. Even though the high frequency response of ferrofluid has been extensively investigated for frequencies up to GHz range by non-optical methods, harnessing dynamic response by optical means for AC magnetic field sensing in fiber-optic-based sensors-field remains unexplored. Instead, the incorporation of nano-ferrofluid as sensing materials has been only limited to DC magnetic field sensing, often citing their long response time as a limiting factor to AC field sensing. This work reports the finding of high frequency (up to 15 kHz) AC magnetic field sensing capability of nanomagnetic fluid as the cladding material of a fiber-optic multimode interferometry (MMI) structure optimized for the fourth self-imaging spectral response. The key parameter enabling high frequency response is the short response time (<1 ms) achieved by optimizing both the sensing structure and nano-ferrofluid solution. Focus has been imparted on 60 Hz line-frequency profiles of various current/magnetic fields to test the efficacy of these sensors in metering and monitoring current and current-induced magnetic fields in the electrical power grid systems. The magnetic field sensitivity of 240 mV/Gauss per dBm of transmitted power was achieved for 60 Hz field applied via Helmholtz coil, whereas the 60 Hz AC current sensitivity of 2.83 mV/A was measured due to magnetic field induced by current in a straight conducting wire.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"26894-26906"},"PeriodicalIF":5.3,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11650606/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851597","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}

{"title":"CsPbBr3 Nanocrystals Prepared Using Block Copolymer Micelles for LEDs","authors":"Belda Amelia Junisu,&nbsp;Ya-Sen Sun*,&nbsp;Cindy Mutiara Septani and Orion Shih,&nbsp;","doi":"10.1021/acsanm.4c0612210.1021/acsanm.4c06122","DOIUrl":"https://doi.org/10.1021/acsanm.4c06122https://doi.org/10.1021/acsanm.4c06122","url":null,"abstract":"<p >We systematically investigated how block copolymer (BCP) templating influences CsPbBr₃ nanocrystals inside polystyrene-<i>block</i>-poly(2-vinylpyridine) (PS_m-<i>b</i>-P2VP_n) micelles in benzene (BEN), toluene (TOL), oxylene (OXY), and 1,3,5-trimethylbenzene (TMB) for light-emitting diode (LED) applications. Each organic solvent features a benzene ring attached to different numbers of methyl groups, thus providing varying solvent qualities for the formation of CsPbBr₃ nanocrystals. We found that solvent quality plays a crucial role in fabricating CsPbBr₃ nanocrystals with a superior photoluminescence (PL) performance and long-term stability. The micellization strength of PS_m-<i>b</i>-P2VP_n is strongest in TMB but weakest in BEN, suggesting that increasing the number of methyl groups attached to benzene enhances micellization. Furthermore, increasing the number of methyl groups attached to benzene also yields three positive effects: increased dissociation, complexation, and coordination interaction of PbBr₂ with P2VP cores. Consequently, each PS_m-<i>b</i>-P2VP_n micelle can capture a higher content of [PbBr₃]⁻ complexes in TMB. Complexation of PbBr₂ followed by coordination interaction with P2VP is also critical because the growth of CsPbBr₃ nanocrystals inside individual micelles involves binding of Cs⁺ cations with [PbBr₃]⁻ complexes rather than with PbBr₂ nanocrystals. However, [PbBr₃]⁻ complexes are not crystalline but amorphous and are not uniformly distributed within the P2VP cores. When a small amount of CsBr was added, a portion of [PbBr₃]⁻ complexes transformed to form CsPbBr₃ perovskite nanocrystals (PNCs) with small size and polydisperse size distribution, coexisting with abundant active [PbBr₃]⁻ and [PbBr₄]^2– complexes. Furthermore, variations in the molecular weights and compositions of PS_m-<i>b</i>-P2VP_n have minimal influence on the size of the CsPbBr₃ nanoparticles. Instead, the CsBr content plays a more decisive role in controlling nanoparticle size, primarily due to the limited solubility of CsBr, an all-inorganic precursor, in methanol.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27745–27760 27745–27760"},"PeriodicalIF":5.3,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsanm.4c06122","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142842885","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}

{"title":"Controllable Epitaxial Growth of Adlayer-Free Hexagonal Boron Nitride Monolayers on Silicon-Incorporated Ni(111) Substrates for Metal–Insulator–Metal Tunneling Devices","authors":"Yuan Li,&nbsp;Quazi Sanjid Mahmud,&nbsp;Chengyun Shou,&nbsp;Abdullah Almujtabi,&nbsp;Edward Zhu,&nbsp;Tianchen Yang and Jianlin Liu*,&nbsp;","doi":"10.1021/acsanm.4c0466010.1021/acsanm.4c04660","DOIUrl":"https://doi.org/10.1021/acsanm.4c04660https://doi.org/10.1021/acsanm.4c04660","url":null,"abstract":"<p >Atomically thin hexagonal boron nitride (h-BN) is heralded as the quintessential dielectric for two-dimensional (2D) material-based electronic devices owing to its exceptional properties. The controlled growth of high-uniformity and high-quality 2D h-BN single crystals stands pivotal for diverse applications. Substrate property is one of the crucial factors that influence the quality of epitaxial 2D h-BN films. In this work, we report the study of the molecular beam epitaxial growth of adlayer-free single-crystal h-BN monolayers on Si-incorporated Ni (111) substrates. It was found that Si-incorporated Ni (111) substrates greatly enhanced the uniformity and quality of h-BN monolayer films by eliminating the formation of 3D adlayers during growth. The structural, optical, and electrical properties of these h-BN monolayers were comprehensively characterized. Metal–insulator–metal (MIM) tunneling devices and nanocapacitors were fabricated based on h-BN monolayers to validate their high performance. Our work provides a promising pathway toward the growth of high-quality 2D h-BN and beyond.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"26794–26803 26794–26803"},"PeriodicalIF":5.3,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843060","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}

{"title":"Nitric Oxide-Loaded Nanobubbles for the Treatment of Acute Pulmonary Embolism and Mitigation of Lung Ischemia–Reperfusion Injury","authors":"Cheng Huang,&nbsp;Juan Jin,&nbsp;Wenxiu Xu,&nbsp;Linfeng Dai,&nbsp;Mingqi Chen,&nbsp;Weiyi Zhou,&nbsp;Xing Wang* and Ning Gu*,&nbsp;","doi":"10.1021/acsanm.4c0513410.1021/acsanm.4c05134","DOIUrl":"https://doi.org/10.1021/acsanm.4c05134https://doi.org/10.1021/acsanm.4c05134","url":null,"abstract":"<p >Acute pulmonary embolism (APE) is a life-threatening complication that is primarily caused by the migration of deep vein thrombosis to the lungs. However, current drug treatments have limited efficacy and can lead to lung ischemia–reperfusion injury (LIRI) after thrombolysis. Inhaled nitric oxide has shown potential for APE therapy, but its clinical feasibility is still uncertain. In this study, nitric oxide (NO) was directly encapsulated by nanobubbles to form NO-loaded nanobubbles (NanoNO) as a potential treatment for APE and subsequent LIRI. NanoNO, with a size of 219.27 ± 2.42 nm and a polydispersity index of 0.17, could encapsulate up to 1.1 mM NO. In the LIRI cell model, NanoNO increased NO concentration and superoxide dismutase (SOD) enzyme activities while reducing reactive oxygen species (ROS) and malondialdehyde (MDA) levels (2.80-fold), leading to decreased cell apoptosis. In a rabbit model of APE, NanoNO was compared to sodium nitroprusside (SNP, a positive control) for thrombolysis efficacy by using blood gas analysis, pulmonary angiography, echocardiography, and hematoxylin–eosin staining. The results demonstrated that NanoNO was more effective than SNP in thrombolysis, as evidenced by its better ability to remove blood clots, normalize pulmonary arteries, and relieve right ventricular (RV) dilatation. In the LIRI rabbit model, NanoNO decreased serum MDA, tumor necrosis factor-α (TNF-α), and interleukin-6 (IL-6) while increasing serum SOD. Collectively, these findings highlight the potential of NanoNO as a promising therapeutic approach for the treatment of APE and the mitigation of LIRI.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27100–27109 27100–27109"},"PeriodicalIF":5.3,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142850549","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}

{"title":"Ag-Doped SnSe Nanosheets for Enhanced NIR-II Light-Induced Apoptosis","authors":"Dequan Xiao,&nbsp;Yan Gong,&nbsp;Jing Zhang,&nbsp;Hui Liu* and Lile Dong*,&nbsp;","doi":"10.1021/acsanm.4c0493210.1021/acsanm.4c04932","DOIUrl":"https://doi.org/10.1021/acsanm.4c04932https://doi.org/10.1021/acsanm.4c04932","url":null,"abstract":"<p >Triple-negative breast cancer (TNBC) is one of the most aggressive and challenging subtypes with limited treatment options and poor prognosis. To overcome these obstacles, Ag-doped SnSe (ASS) nanosheets were used as photonic hyperthermia agents for treating TNBC. ASS featured a high photothermal-conversion efficiency and photon hyperthermia effect. Additionally, biosafety assessments, including hemolysis assays and histopathological analysis, confirmed that ASS was biosafety. These findings suggest that ASS, in synergy with the second near-infrared biowindow (NIR-II) light irradiation, offers a noninvasive, effective, and safe therapeutic strategy for TNBC. This innovative approach exemplifies the evolving landscape of TNBC treatment, where technology and biology converge to offer more precise and personalized therapies.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"26919–26927 26919–26927"},"PeriodicalIF":5.3,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142850981","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}

{"title":"Energetic Al-Coated 5,5′-Dinitro-3,3′-bi(1,2,4-triazole) Green Functionalized Cu Nanosheet Films for Ignition-Able Micro Devices","authors":"Yapeng Yao,&nbsp;Xiaodong Gou,&nbsp;Wei Liu*,&nbsp;Zihang Liang,&nbsp;Jiangbo Zhang and Zhongliang Ma,&nbsp;","doi":"10.1021/acsanm.4c0581410.1021/acsanm.4c05814","DOIUrl":"https://doi.org/10.1021/acsanm.4c05814https://doi.org/10.1021/acsanm.4c05814","url":null,"abstract":"<p >Integrating energetic materials into microelectromechanical system (MEMS) to enhance their energy output characteristics has shown extensive potential across aerospace, defense, and civilian applications. Within this study, the MEMS compatible Cu/DNBT (DNBT = [5,5′-dinitro-3,3′-bi(1,2,4-triazole)]) and Cu/DNBT@nano-Al energetic films were successfully synthesized on the copper substrate using an electrochemical method and a drip coating method. The scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), differential thermal analyses (DTA), and a pulse laser ignition test were used to analyze the morphology, composition, thermal performance, and ignition properties of the prepared samples. The findings indicate that the prepared Cu/DNBT and Cu/DNBT@nano-Al energetic films exhibit a nanostructure, and their morphology can be effectively regulated via modifications to the deposition voltage, deposition time, and aluminum plating frequency. Furthermore, the energetic properties of Cu/DNBT@nano-Al films can be adjusted after the deposition of nano-Al. Their heat release, flame height and ignition duration can reach up to 1823.1 J·g^–1, 13.5 mm, and 400 μs, respectively. These findings suggest that Cu/DNBT@nano-Al energetic films being a prime contender for initiating powders in MEMS pyrotechnics. In summary, this work offers valuable insights into the integration and application of energetic materials in MEMS ignition devices.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27698–27705 27698–27705"},"PeriodicalIF":5.3,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851078","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}

{"title":"Combinatorial Printing of Iron and Cobalt Reactive Inks to Produce Magnetic Amorphous and Nanocrystalline Metals","authors":"Collin E. Miller,&nbsp;Joshua Edwards,&nbsp;Chris Matsumura,&nbsp;Matthew Michael Schneider,&nbsp;Serena Eley,&nbsp;Suveen N. Mathaudhu and Owen J. Hildreth*,&nbsp;","doi":"10.1021/acsanm.4c0504710.1021/acsanm.4c05047","DOIUrl":"https://doi.org/10.1021/acsanm.4c05047https://doi.org/10.1021/acsanm.4c05047","url":null,"abstract":"<p >Reactive inks are an attractive method to selectively pattern metallic features with minimal post-processing. While significant progress has been made developing silver and copper reactive inks for printed electronics, less progress has been made in developing metal reactive inks with properties suitable for structural or magnetic applications. To address this gap, this work introduces particle-free iron and cobalt metal reactive inks to print magnetic iron and cobalt metals. Interestingly, structure analysis of the printed reactive inks showed that the iron reactive ink produced fully amorphous iron and the cobalt reactive ink produced nanocrystals dispersed in an amorphous matrix. This work also demonstrates two combinatorial methods of printing these inks: by mixing the two inks together to produce amorphous iron–cobalt alloys and by spatially patterning the iron and cobalt monometallic inks to achieve control over both the local composition and the correlated atomic structure. Triiron dodecacarbonyl and dicobalt octacarbonyl are used as the iron and cobalt metal precursors, respectively, because these zerovalent metal complexes directly decompose to metal and carbon monoxide gas. The printed metals’ elemental and chemical compositions were evaluated using energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and Mössbauer effect spectroscopy showing that the amorphous phases are likely stabilized by either remnant carbonyl bonds from incomplete decomposition of the metal carbonyl or residual octylamine solvent interacting with the metal atoms. Additional characterization includes resistivity measurements to verify metallic conductivity, nanoindentation to quantify hardness, and magnetometry studies to quantify the magnetic performance. As a demonstration, the Fe and Co reactive inks were sequentially printed in a combinatorial layer-by-layer manner to produce a vertically graded iron and cobalt line, as well as a matrix of nanocrystalline cobalt dots on an amorphous iron film. Overall, this work introduces a method to directly print continuous, amorphous, magnetic, and structural alloys at moderate temperatures from a particle-free reactive ink.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27052–27063 27052–27063"},"PeriodicalIF":5.3,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142850980","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}

{"title":"NiPd Nanoparticles Deposited on CeO2 Nanorods as Catalysts for Enhancing Hydrogen Storage in MgH2","authors":"Yu Xu,&nbsp;Houqun Xiao,&nbsp;Jiekai Xu,&nbsp;Huazhou Hu,&nbsp;Chenyu Li,&nbsp;Songsong Li,&nbsp;Ruizhu Tang,&nbsp;Chuanming Ma,&nbsp;Luocai Yi* and Qingjun Chen*,&nbsp;","doi":"10.1021/acsanm.4c0524510.1021/acsanm.4c05245","DOIUrl":"https://doi.org/10.1021/acsanm.4c05245https://doi.org/10.1021/acsanm.4c05245","url":null,"abstract":"<p >Magnesium hydride (MgH₂) stands out as one of the most promising hydrogen storage materials due to its high hydrogen storage capacity and low cost. Nevertheless, its sluggish kinetics and remarkable stability pose significant challenges, restricting its widespread practical application. In this study, we successfully synthesized a CeO₂-supported NiPd catalyst (NiPd/CeO₂) by firmly embedding a small amount of Ni_0.5Pd_0.5 alloy nanoparticles on CeO₂ nanorods. This catalyst notably lowered the initial dehydrogenation temperature of MgH₂ from over 300 to 219 °C. When 10 wt % of the NiPd/CeO₂ was incorporated into MgH₂, the resulting composites exhibited impressive hydrogen storage kinetics. Specifically, they were able to release approximately 6 wt % H₂ within 500 s at 350 °C and absorb about 6.4 wt % H₂ in just 40 s at 250 °C. Furthermore, these composites showed excellent cycling stability, maintaining over 90% of their hydrogen storage capacity after 20 cycles. Combining multiple characterization techniques revealed that the excellent catalytic performance was primarily attributed to the rich oxygen vacancies on the CeO₂ nanorods, which facilitated the strong embedding of Ni_0.5Pd_0.5 nanoparticles on CeO₂. This, in turn, led to a synergistic effect between Ni, Pd, and CeO₂. The <i>in situ</i>-formed Mg₆Ni/Mg₆Pd functions as a “hydrogen pump”, facilitating enhanced hydrogen absorption and dehydrogenation processes in MgH₂. These results offer valuable insights into the design of catalysts and the identification of active species involved in modifying MgH₂.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27426–27435 27426–27435"},"PeriodicalIF":5.3,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851077","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}