Next Nanotechnology最新文献_第7页

Recent advances of graphene-based materials in planar perovskite solar cells 平面包晶体太阳能电池中石墨烯基材料的最新进展

Next Nanotechnology Pub Date : 2024-01-01 DOI: 10.1016/j.nxnano.2024.100061

Faycal Znidi, Mohamed Morsy, Md. Nizam Uddin

{"title":"Recent advances of graphene-based materials in planar perovskite solar cells","authors":"Faycal Znidi, Mohamed Morsy, Md. Nizam Uddin","doi":"10.1016/j.nxnano.2024.100061","DOIUrl":"https://doi.org/10.1016/j.nxnano.2024.100061","url":null,"abstract":"<div><p>Perovskite solar cells (PSC) have emerged as highly efficient photovoltaic devices, boasting remarkable power conversion efficiencies (PCE) exceeding 25.5%. However, the incorporation of perovskite films raises environmental concerns due to associated toxicity, and PSC deteriorates over time due to material breakdown accelerated by heat, moisture, and undesired chemical reactions at interfaces. For example, employing titanium dioxide TiO₂ as the electron transport layer (ETL) and the organic semiconductor Spiro-OMeTAD as the hole transport layer (HTL) can lead to instability in the device. The broad bandgap of TiO₂ leads to charge carrier recombination in ETL, undermining device performance, along with the high cost and complex synthesis of Spiro-OMeTAD. Researchers have investigated several methods to tackle these challenges, including altering the interfacial structure and employing adaptable materials between the charge-gathering electrode and perovskite active layers. Due to their extensive bandgap and notable electron mobility, perovskite oxides are highly attractive; however, these materials encounter difficulties such as clustering, which can cause short circuits and leakage current. They also suffer from inefficient charge separation, surface hydrophilicity, and inadequate absorption of visible light. Furthermore, the addition of graphene particles to both compact and mesoporous TiO₂ layers, which act as electron-selective layers, aims to lower series resistance and boost electron extraction efficiency, achieving a peak PCE of 26.3%. These materials have garnered attention for their outstanding optoelectronic properties, superior stability, and non-toxic characteristics. This review extensively delves into the integration of graphene-based materials as interfacial layers and how that will affect the performance of PSC in terms of stability and efficiency.</p></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949829524000226/pdfft?md5=bc5bfd1655788578eb0372a0da14c448&pid=1-s2.0-S2949829524000226-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140066683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D inverted cone hydrogels derived by MXene-TiOX nanocomposite for sequential regulation of enhanced solar-driven steam generation 由 MXene-TiOX 纳米复合材料衍生的三维倒锥形水凝胶可用于增强型太阳能驱动蒸汽发电的顺序调节

Next Nanotechnology Pub Date : 2024-01-01 DOI: 10.1016/j.nxnano.2024.100040

Wei Zhou , Naila Arshad , Bo Xiao , Xin Xiong , Fang Yu , Shihao He , Muhammad Sultan Irshad , Xianbao Wang , Liangyou Lin

{"title":"3D inverted cone hydrogels derived by MXene-TiOX nanocomposite for sequential regulation of enhanced solar-driven steam generation","authors":"Wei Zhou , Naila Arshad , Bo Xiao , Xin Xiong , Fang Yu , Shihao He , Muhammad Sultan Irshad , Xianbao Wang , Liangyou Lin","doi":"10.1016/j.nxnano.2024.100040","DOIUrl":"https://doi.org/10.1016/j.nxnano.2024.100040","url":null,"abstract":"<div><p>Solar-driven steam generation technology is an environmentally friendly, cost-effective means of sewage treatment and seawater desalination. A significant challenge in the development of this technology is improving the evaporation performance of evaporation devices. Herein, we report an innovative three-dimensional (3D) solar evaporator constructed with MXene-TiO<sub>X</sub> nanocomposite as the photothermal layer and polyvinyl alcohol hydrogel as the water-transport medium. An inverted cone-concave structure of 30° on the photothermal layer can absorb more sunlight through diffuse light reflection. The 3D solar evaporator demonstrates a notable evaporation rate of 2.09 kg m⁻² h⁻¹ , surpassing the efficacy of alternative evaporative systems. In the seawater desalination experiment, the condensed water had salinity levels that were considerably lower than the established threshold for drinking water. The ion rejection ratios for the four primary ions demonstrate a high level of efficacy, with values approaching 99.91%. In addition, the 3D solar evaporator exhibits robust performance in the context of wastewater treatment. This study provides significant contributions to the understanding of the efficiency of solar evaporators based on structural design principles, offering approaches to mitigate the challenges posed by limited freshwater availability.</p></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949829524000019/pdfft?md5=59de375c1d48fed0ae6483b61070e6b5&pid=1-s2.0-S2949829524000019-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139433820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical behavior of carbon/nickel sulfide nanocomposite thin films for advanced energy applications 用于先进能源应用的碳/硫化镍纳米复合薄膜的电化学行为

Next Nanotechnology Pub Date : 2024-01-01 DOI: 10.1016/j.nxnano.2024.100080

Ayushi Sharma, Shreya , Peeyush Phogat, Ranjana Jha, Sukhvir Singh

{"title":"Electrochemical behavior of carbon/nickel sulfide nanocomposite thin films for advanced energy applications","authors":"Ayushi Sharma, Shreya , Peeyush Phogat, Ranjana Jha, Sukhvir Singh","doi":"10.1016/j.nxnano.2024.100080","DOIUrl":"https://doi.org/10.1016/j.nxnano.2024.100080","url":null,"abstract":"<div><p>The present study focuses on the hydrothermal synthesis of nickel sulfide (NiS) stabilized on carbon nanospheres (CNSs) with varying concentrations of CNSs. The samples were annealed to study the effect on their structural, chemical, and optical properties. Various characterizations were performed to confirm the presence of NiS nanocomposites, to study the annealing effects, and to examine how the increased amount of carbon nanospheres affects the sample properties. X-ray diffraction (XRD) patterns revealed the formation of multiple-phase C/NiS<sub>2</sub>/NiSO<sub>4</sub>·6(H<sub>2</sub>O) nanocomposites, which were observed to be forming CNSs/NiS nanocomposites after annealing, indicating the removal of sulfate impurity. Significant variations in the bandgap and absorption spectra were observed due to the varying concentration of CNSs from 0.3 g to 0.7 g. Morphological study through field emission scanning electron microscope (FESEM) showed the formation of nanosheets of NiS<sub>2</sub>/NiSO<sub>4</sub>·6(H<sub>2</sub>O) over carbon nanospheres, which was reduced to NiS after annealing. Transmission electron microscope (TEM) images of annealed samples showed the formation of CNSs/NiS nanocomposites. Electrochemical studies conducted through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) showed diffusion-controlled behavior in all samples, rendering samples ideal for solar cell applications with the value of Warburg impedance 116.4 Ohm(s)<sup>1/2</sup> for CNS1. Overall, the characterization results provide valuable insights into the properties and behavior of the synthesized nanocomposites.</p></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S294982952400041X/pdfft?md5=6cee8042f6d04428ff672eb42f3aac94&pid=1-s2.0-S294982952400041X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141542026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Antioxidant action of L-cysteine anchored on the surface of magnetite nanoparticles 锚定在磁铁矿纳米颗粒表面的 L-半胱氨酸的抗氧化作用

Next Nanotechnology Pub Date : 2024-01-01 DOI: 10.1016/j.nxnano.2024.100076

Tatiane Britos , Nicole Santana , Maria Lucia Schumacher , Emerson Barbosa , Ariane de Espindola , Camila Chagas , Fernando L.A. Fonseca , Fabio F. Ferreira , Paula S. Haddad

{"title":"Antioxidant action of L-cysteine anchored on the surface of magnetite nanoparticles","authors":"Tatiane Britos , Nicole Santana , Maria Lucia Schumacher , Emerson Barbosa , Ariane de Espindola , Camila Chagas , Fernando L.A. Fonseca , Fabio F. Ferreira , Paula S. Haddad","doi":"10.1016/j.nxnano.2024.100076","DOIUrl":"https://doi.org/10.1016/j.nxnano.2024.100076","url":null,"abstract":"<div><p>This study addresses the synthesis, characterization, and evaluation of L-Cysteine (L-Cys) molecules anchored on superparamagnetic iron oxide nanoparticles (SPIONs), mainly magnetite (Fe<sub>3</sub>O<sub>4</sub>), for potential drug delivery applications. Fe<sub>3</sub>O<sub>4</sub> nanoparticles are obtained via co-precipitation and functionalized with L-Cys to improve biocompatibility and antioxidant activity. To optimize the functionalization process, the dimerization of cysteine to cystine is investigated by varying the reaction time and mass proportions. The samples are characterized by powder X-ray diffraction (PXRD), Fourier transform infrared (FTIR) and Raman spectroscopies, transmission electron microscopy (TEM), and magnetic curves. These results confirm that L-Cys molecules are anchored on the nanoparticle surface through their carboxylate groups, with free SH groups present in the dispersed nanoparticles. However, in the solid state, L-Cys dimerization leads to a cystine crystal structure, resulting in no free SH groups. The nanoparticles have a magnetite structure with an average crystallite size of (8.7±0.8) nm and superparamagnetic behavior. <em>In vitro</em> biological assays show the antioxidant effect of L-Cysteine on the surface of the nanoparticles.</p></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949829524000378/pdfft?md5=d5295712cb576339e69cc2ed44a6098c&pid=1-s2.0-S2949829524000378-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141243401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of nanoparticles on plant physiology, nutrition, and toxicity: A short review 纳米粒子对植物生理、营养和毒性的影响：简评

Next Nanotechnology Pub Date : 2024-01-01 DOI: 10.1016/j.nxnano.2024.100081

Devendra Singh , Avinash Sharma , Sunil Kumar Verma , Himanshu Pandey , Minakshi Pandey

{"title":"Impact of nanoparticles on plant physiology, nutrition, and toxicity: A short review","authors":"Devendra Singh , Avinash Sharma , Sunil Kumar Verma , Himanshu Pandey , Minakshi Pandey","doi":"10.1016/j.nxnano.2024.100081","DOIUrl":"https://doi.org/10.1016/j.nxnano.2024.100081","url":null,"abstract":"<div><p>Due to the positive link between the application of nanoparticles (NPs) and the improved nutritional status/value of the plants exposed to them, nanomaterials have recently attracted rising interest in the field of agriculture. Numerous NPs, including carbon-based NPs, silica NPs, etc., have been discovered to positively affect plants by raising their ratio of nutrient uptake and nutrient utilization efficiency, amongst other things. All of these qualities have opened the door for potential improvements in plant development, vigor, growth, etc. when these NPs are used primarily as Nano fertilizers. In light of all of this, it is also possible to draw the conclusion that nanotechnology holds great promise for playing a significant role in the international situation of growing demand for the production of food as well as supply in the years to come. In order to give researchers working in this field a thorough understanding, an effort has been made to compile all the encouraging developments about the application of various NPs on plants, together with their likely mode of action, in this review.</p></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949829524000421/pdfft?md5=6606f724e1d7eb8a8540f47b7caa4595&pid=1-s2.0-S2949829524000421-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141485161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tunable luminescence in pyrochlore Lu2Sn2O7:Eu3+ nanoparticles at elevated pressure 高温高压下热绿石 Lu2Sn2O7:Eu3+ 纳米粒子的可调发光特性

Next Nanotechnology Pub Date : 2024-01-01 DOI: 10.1016/j.nxnano.2024.100046

Santosh K. Gupta , K. Sudarshan , Yuanbing Mao

{"title":"Tunable luminescence in pyrochlore Lu2Sn2O7:Eu3+ nanoparticles at elevated pressure","authors":"Santosh K. Gupta , K. Sudarshan , Yuanbing Mao","doi":"10.1016/j.nxnano.2024.100046","DOIUrl":"https://doi.org/10.1016/j.nxnano.2024.100046","url":null,"abstract":"<div><p>High pressure study is crucial in chemical, physical and materials sciences for understanding phase transitions, new phase evolution and in designing pressure sensors. Utilizing the high potential of pyrochlore as luminescent sensors and its structural diversity, Lu<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub>:5.0%Eu<sup>3+</sup> (LSOE) nanoparticles (NPs) have been synthesized using a hydrothermal method and characterized at ambient condition using x-ray diffraction (XRD), Raman spectroscopy and field emission scanning electron microscopy (FESEM). The reduced intensity of hypersensitive electric dipole transitions (<sup>5</sup>D<sub>0</sub>→<sup>7</sup>F<sub>2</sub>), reduction in average luminescence lifetime, and increase in symmetry around Eu<sup>3+</sup> has also being observed in the LSOE NPs induced by the applied high pressure. The same is reflected in color tuning from red to orange to yellow on switching pressure from low to medium to high. Lifetime spectroscopy suggests that high pressure causes site-swapping of europium ion from Lu<sup>3+</sup> to Sn<sup>4+</sup>, which triggers change in local symmetry around Eu<sup>3+</sup>. This work will pave a newer way of designing high pressure induced color tunable phosphor, high pressure sensor and need-based site engineering in pyrochlore compounds and their nanomaterials for high pressure applications.</p></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S294982952400007X/pdfft?md5=820f3cbe62c101dc871e57539177ddf8&pid=1-s2.0-S294982952400007X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139503885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Atomic layer deposition technology for the development of high-quality, full-colour micro-LED displays 用于开发高质量全彩微型 LED 显示器的原子层沉积技术

Next Nanotechnology Pub Date : 2024-01-01 DOI: 10.1016/j.nxnano.2024.100051

Zijun Yan , Suyang Liu , Yue Sun , Rongxing Wu , Youqin Lin , Hao-Chung Kuo , Zhong Chen , Tingzhu Wu

{"title":"Atomic layer deposition technology for the development of high-quality, full-colour micro-LED displays","authors":"Zijun Yan , Suyang Liu , Yue Sun , Rongxing Wu , Youqin Lin , Hao-Chung Kuo , Zhong Chen , Tingzhu Wu","doi":"10.1016/j.nxnano.2024.100051","DOIUrl":"10.1016/j.nxnano.2024.100051","url":null,"abstract":"<div><p>Micro light-emitting diodes (μLEDs) with unparalleled photoelectric characteristics are essential components for developing metaverse-related technologies. Immersive displays require reducing the LED size to the micro- or sub-microscale while retaining optimal optoelectronic capabilities. μLEDs, fabricated through the quantum dots colour conversion layer (QDs-CCL) process, offer a cost-effective solution for achieving displays with full-colour and ultrahigh quality. However, the sidewall defects significantly affect the optical and electrical properties of μLEDs with reduced chip size. Furthermore, QDs suffer from low excitation radiation and inferior operational stability induced by their intrinsic properties. Atomic layer deposition (ALD) is a promising chemical surface treatment technique with self-limiting properties that can enhance full-colour μLED devices. In this review, we explore recent studies on ALD techniques for full-colour μLED device fabrication. We discuss in detail the significant contribution of ALD in repairing sidewall defects in RGB tricolour μLED chips. Moreover, we explore applications of ALD in the protection of QDs and preparation of high-resolution CCLs. Finally, we discuss future prospects of ALD in developing high-resolution, full-colour displays.</p></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949829524000123/pdfft?md5=48cff398c130553b6d52482ba9dffe22&pid=1-s2.0-S2949829524000123-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139832113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent progresses on perovskite quantum dots patterning techniques for color conversion layer in micro-LED displays 用于微型 LED 显示器色彩转换层的包晶量子点图案化技术的最新进展

Next Nanotechnology Pub Date : 2024-01-01 DOI: 10.1016/j.nxnano.2024.100045

Xiaotong Fan , Xiao Yang , Xuemin Kong , Tianqi Zhang , Shuli Wang , Yue Lin , Zhong Chen

引用次数: 0

Evaluation of the performance of magnetic zeolite nanocomposites in removing various water contaminants as heavy metals, organic pollutants, and emerging contaminants: A review 评估磁性纳米沸石复合材料去除重金属、有机污染物和新兴污染物等各种水污染物的性能：综述

Next Nanotechnology Pub Date : 2024-01-01 DOI: 10.1016/j.nxnano.2024.100075

Koffi Sossou , S. Bala Prasad , Eyram Komlavi Agbotsou , Halarou Saidou Souley

{"title":"Evaluation of the performance of magnetic zeolite nanocomposites in removing various water contaminants as heavy metals, organic pollutants, and emerging contaminants: A review","authors":"Koffi Sossou , S. Bala Prasad , Eyram Komlavi Agbotsou , Halarou Saidou Souley","doi":"10.1016/j.nxnano.2024.100075","DOIUrl":"https://doi.org/10.1016/j.nxnano.2024.100075","url":null,"abstract":"<div><p>The presence of organic and inorganic contaminants such as pesticides, antibiotics, dyes, and heavy metals poses a risk to a human and the environment and therefore needs to be removed. The combination of natural zeolites and magnetic nanoparticles is employed as an excellent adsorbent for these pollutants removal from water. Magnetic zeolites are synthesized by incorporating magnetic nanoparticles, such as iron oxides or ferrites, into the zeolite framework. Various techniques, including co-precipitation, impregnation, and hydrothermal synthesis, have been employed by researchers to create the necessary magnetic zeolite composites and employed them for removing or reducing recalcitrant pollutants present in water or aqueous solutions. Magnetic zeolites have shown great promise in the removal of contaminants present in water. One of its best sides is its ability to separate and reuse materials easily. This review emphasizes magnetic zeolite as an effective adsorbent for water remediation and demonstrates its potential for water treatment. Magnetic zeolite can be used especially in regions where water treatment technologies are not yet met and can address waterborne disease issues. Due to its magnetic properties, and easier recovery and reuse of the adsorbents, the magnetic zeolite adsorption method is cost-effective and convenient</p></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949829524000366/pdfft?md5=5e266cb227a90743f3205f2464d5d9fc&pid=1-s2.0-S2949829524000366-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140807118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Loading Platinum-Cobalt Intermetallic Compounds with Enhanced Oxygen Reduction Activity in Membrane Electrode Assemblies 高负载铂钴金属间化合物可增强膜电极组件的氧气还原活性

Next Nanotechnology Pub Date : 2024-01-01 DOI: 10.1016/j.nxnano.2024.100065

Yi Zhang , Yao-Lin A , Xiao-Qun Xie , Di-Ye Wei , Tao Shen , Qing-Na Zheng , Jin-Chao Dong , Jing-Hua Tian , Hua Zhang , Jian-Feng Li

{"title":"High-Loading Platinum-Cobalt Intermetallic Compounds with Enhanced Oxygen Reduction Activity in Membrane Electrode Assemblies","authors":"Yi Zhang , Yao-Lin A , Xiao-Qun Xie , Di-Ye Wei , Tao Shen , Qing-Na Zheng , Jin-Chao Dong , Jing-Hua Tian , Hua Zhang , Jian-Feng Li","doi":"10.1016/j.nxnano.2024.100065","DOIUrl":"https://doi.org/10.1016/j.nxnano.2024.100065","url":null,"abstract":"<div><p>Platinum-based intermetallic compounds (IMCs) are emerging as promising oxygen reduction reaction (ORR) catalysts in proton exchange membrane fuel cells (PEMFCs). However, large-scale synthesis of supported IMCs catalysts with small particle size and high loading remains a significant challenge, greatly hindering the applications of IMCs in PEMFCs. Herein, carbon-supported PtCo IMCs with a metal loading of ∼40% and a mean size of ∼5 nm were successfully prepared via a simple impregnation method and display excellent performances in membrane electrode assemblies (MEA). The ordering degree of the PtCo IMCs can be tuned by carefully manipulating the annealing conditions. X-ray photoelectron spectroscopy characterizations demonstrate that the electronic interactions between Pt and Co are strengthened due to highly ordered structure of PtCo IMCs, thus promoting the ORR performance. The optimized PtCo IMCs exhibit an excellent ORR performance with a specific activity of 2.02 mA cm<sup>−2</sup> and mass activity of 0.92 A mgPt<sup>−1</sup> at 0.9 V (vs. RHE), which are approximately 5 times and 6 times higher than those of the commercial Pt/C. More importantly, the PtCo IMCs also display enhanced performance in MEA, and the power density at 1.5 A cm<sup>−2</sup> and 2.5 A cm<sup>−2</sup> is 0.949 W cm<sup>−2</sup> and 1.244 W cm<sup>−2</sup>, respectively, thus reducing the Pt usage by 40% compared to Pt/C. This work offers a facile route for the scale preparation of platinum-based intermetallic compounds and promotes their practical applications in PEMFCs.</p></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949829524000263/pdfft?md5=d36ad1dda910b75d763085687d864d2e&pid=1-s2.0-S2949829524000263-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140160681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0