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Epitaxial La: HfO2 films deposited on (111)-oriented SrTiO3
IF 2.5 4区 材料科学
Applied Physics A Pub Date : 2025-04-18 DOI: 10.1007/s00339-025-08513-y
Mingkai Qing, Peijie Jiao, Hongying Chen, Zhiyu Liu, Yu Deng, Di Wu
{"title":"Epitaxial La: HfO2 films deposited on (111)-oriented SrTiO3","authors":"Mingkai Qing,&nbsp;Peijie Jiao,&nbsp;Hongying Chen,&nbsp;Zhiyu Liu,&nbsp;Yu Deng,&nbsp;Di Wu","doi":"10.1007/s00339-025-08513-y","DOIUrl":"10.1007/s00339-025-08513-y","url":null,"abstract":"<div><p>(111)-oriented 5%La: HfO<sub>2</sub> (HLO) thin films have been successfully deposited on La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub> buffered (111)-oriented SrTiO<sub>3</sub> (STO) substrates by pulsed laser deposition. The growth of the orthorhombic HLO films with a rhombohedral distortion follows a domain matching epitaxy mechanism and twin domains appear as revealed by atomic resolution scanning transmission electron microscopy. These (111)-oriented HLO films show 6-fold in-plane symmetry due to the twin domains rotated 180° to each other around the surface normal. The HLO films, 15 nm in thickness, on (111)-oriented STO exhibit robust ferroelectric properties with an optimized remanent polarization around 13 µC/cm<sup>2</sup> without any wake-up process.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Specifying the Mo doped CaFeO3 electrode material for the application in supercapacitor
IF 2.5 4区 材料科学
Applied Physics A Pub Date : 2025-04-18 DOI: 10.1007/s00339-025-08501-2
Haifa A. Alyousef, Shaimaa A. M. Abdelmohsen, Areej Saleh Alqarny, Najla Alotaibi, Younis Ejaz, Muhammad Imran, Hafiz Muhammad Farid
{"title":"Specifying the Mo doped CaFeO3 electrode material for the application in supercapacitor","authors":"Haifa A. Alyousef,&nbsp;Shaimaa A. M. Abdelmohsen,&nbsp;Areej Saleh Alqarny,&nbsp;Najla Alotaibi,&nbsp;Younis Ejaz,&nbsp;Muhammad Imran,&nbsp;Hafiz Muhammad Farid","doi":"10.1007/s00339-025-08501-2","DOIUrl":"10.1007/s00339-025-08501-2","url":null,"abstract":"<div><p>The innovation in energy storage technology is crucial to solving the world’s energy problems. Renewable resources have drawn the interest of researchers because the non-renewable resources are limited. Supercapacitors are revolutionary storage and energy conversion devices that are gaining popularity due to their higher specific power. The present study is about the fabrication of CaFeO<sub>3</sub> and Mo-doped CaFeO<sub>3</sub> through sustainable hydrothermal technique. To verify its electrochemical properties, different techniques were used, including charge-discharge as well as electrochemical surface area. The capacitance of the resulting Mo-doped CaFeO<sub>3</sub> material is 1722.5 F/g, which is greater than that of the CaFeO<sub>3</sub> material with capacitance of 897.8 F/g. The produced Mo-doped CaFeO<sub>3</sub> material has 237.5 W/kg of specific power and 54.1 Wh/kg of specific energy. The produced CaFeO<sub>3</sub> doped with Mo showed remarkable retention after undergoing 5000<sup>th</sup> cycle. The electrochemical performance and the specific surface area of pure material was improved by doping. The results showed that the doped material’s electrochemical activity was enhanced and charges were stored more effectively than the pure material. The exceptional performance of Mo-doped CaFeO<sub>3</sub> nanomaterial indicates their significant potential for future energy storage technology.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structural, optical and electrical conductivity analysis of iron supplanted LaPrCoMnO6 system for electrochemical applications
IF 2.5 4区 材料科学
Applied Physics A Pub Date : 2025-04-18 DOI: 10.1007/s00339-025-08521-y
Reena Sharma, Neelam Hooda, Amit Hooda, Ashima Hooda, Satish Khasa
{"title":"Structural, optical and electrical conductivity analysis of iron supplanted LaPrCoMnO6 system for electrochemical applications","authors":"Reena Sharma,&nbsp;Neelam Hooda,&nbsp;Amit Hooda,&nbsp;Ashima Hooda,&nbsp;Satish Khasa","doi":"10.1007/s00339-025-08521-y","DOIUrl":"10.1007/s00339-025-08521-y","url":null,"abstract":"<div><p>Double perovskite system LaPrCo<sub>1 − x</sub>Fe<sub>x</sub>MnO<sub>6</sub>; (x = 0.2, 0.5, 0.8 and 1.0) was developed by sol-gel method and its structural, microstructural, optical as well as electrical properties were investigated. X-Ray Diffraction analysis inveterate the phase formation with monoclinic structure (<i>P2</i><sub><i>1</i></sub><i>/n</i>) as well as a slight shifting of diffraction peaks towards left is noticed with substitution of Fe<sup>3+</sup> for Co<sup>2+</sup>. The crystallite size as well as strain, both exhibited similar tendency with x and varies from 506 Å to 1100 Å and 0.94 × 10<sup>− 3</sup> to 1.87 × 10<sup>− 3</sup>, respectively and both the parameters showed their maximum value for x = 0.5 composition. Field Emission Scanning Electron Microscopy study divulged that mean grain size is of micrometre order (1.27 to 1.96 μm, maximum for x = 0.5) and EDX analysis confirmed the availability of all anticipated elements. High Resolution Transmission Electron Microscopy with Selected Area Electron Diffraction (SAED) pattern confirmed the crystallinity as well as purity of prepared system with inter-planar spacing 0.286 nm for x = 0.2 composition. X-Ray Photoelectron Spectroscopy analysis inveterate coexistence of various oxidation states of transition metal cations such as + 2/+3 for cobalt and iron whereas + 3/+4 for manganese. Ultra Violet-Visible-Near Infrared (UV-Vis-NIR) reflectance spectra inveterate semiconductor type band gap of ~ 2 eV with a maximum optical band gap of 2.13 eV for x = 0.5 composition. DC conductivity analysis suggested semiconducting behaviour and followed both thermal activation and variable range hopping conduction mechanisms. Three different slopes in Arrhenius plot with distinct activation energies inveterate the presence of electronic as well as ionic conduction. DC conductivity decreased initially with Fe substitution, afterwards displayed increasing behaviour up to x = 0.8, and then again decreased for x = 1.0. The decrease in DC conductivity suggested weakening of double-exchange interactions due to decrease in ratio of Mn<sup>3+</sup>/Mn<sup>4+</sup> (and Co<sup>2+</sup>/Co<sup>3+</sup>) on substitution of Fe<sup>3+</sup> for Co<sup>2+</sup>. The synthesized LaPrCo<sub>1 − x</sub>Fe<sub>x</sub>MnO<sub>6</sub> system displayed good electronic/ionic conductivity, making it apposite for electrochemical devices.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A method to include exclusive heavy vector-meson production data at small x in global parton analyses
IF 4.2 2区 物理与天体物理
The European Physical Journal C Pub Date : 2025-04-18 DOI: 10.1140/epjc/s10052-025-14142-9
C. A. Flett, A. D. Martin, M. G. Ryskin, T. Teubner
{"title":"A method to include exclusive heavy vector-meson production data at small x in global parton analyses","authors":"C. A. Flett,&nbsp;A. D. Martin,&nbsp;M. G. Ryskin,&nbsp;T. Teubner","doi":"10.1140/epjc/s10052-025-14142-9","DOIUrl":"10.1140/epjc/s10052-025-14142-9","url":null,"abstract":"<div><p>We propose a method which allows the inclusion of exclusive heavy vector-meson production data at low <i>x</i> in future global parton analyses. As an example we perform a study within <span>xFitter</span> to determine the gluon parton distribution function (PDF) at next-to-leading order (NLO) at moderate-to-low <i>x</i> using the measurements of exclusive <span>(J/psi )</span> production in <i>ep</i> and <i>pp</i> collisions from HERA and LHC. We further study the constraints from the corresponding <span>(Upsilon )</span> production process. We finish by discussing the possible effects at next-to-next-to-leading order (NNLO) through incorporation of a <i>K</i> factor for the exclusive heavy vector-meson coefficient function at NLO.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 4","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14142-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structural distortion facilitated magnetic and ferroelectric ordering in Ba-doped SrFeO3−δ
IF 2.5 4区 材料科学
Applied Physics A Pub Date : 2025-04-18 DOI: 10.1007/s00339-025-08525-8
Rahul Kumar Sahu, Aashish Panwar, Amiya Ranjan Sahoo, Oroosa Subohi
{"title":"Structural distortion facilitated magnetic and ferroelectric ordering in Ba-doped SrFeO3−δ","authors":"Rahul Kumar Sahu,&nbsp;Aashish Panwar,&nbsp;Amiya Ranjan Sahoo,&nbsp;Oroosa Subohi","doi":"10.1007/s00339-025-08525-8","DOIUrl":"10.1007/s00339-025-08525-8","url":null,"abstract":"<div><p>This study explores the synthesis and structural transformation of Ba-doped SrFeO<sub>3−δ</sub> exhibiting interesting electronic and magnetic properties. These samples with the general formula Sr<sub>1 − x</sub>Ba<sub>x</sub>FeO<sub>3−δ</sub> (x = 0, 0.1, 0.15, 0.2) were prepared using the citrate auto-combustion method. X-ray diffraction analysis, complemented by Rietveld refinement, confirmed the formation of single-phase cubic structure with space group <i>Pm-3 m</i> for the undoped sample. However, the introduction of larger-radii Ba²⁺ ions caused lattice distortion, leading to symmetry reduction into the <i>P1</i> space group. The impact of Ba doping on grain size evolution was further examined using field emission scanning electron microscopy (FESEM), and energy-dispersive X-ray spectroscopy (EDS). The stretching vibrational mode of Fe-O at 600 cm⁻¹ supported the presence of an octahedral coordination. Room-temperature Mössbauer spectroscopy provided insights into the Fe⁴⁺/Fe³⁺ ratio and corroborated the structural transformation. Among the synthesized samples, Sr<sub>0.8</sub>Ba<sub>0.2</sub>FeO<sub>3−δ</sub> demonstrated the highest magnetization (M<sub>s</sub>=1.102 emu/g, M<sub>r</sub>=0.026 emu/g) and enhanced ferroelectric properties (0.1 µC/cm<sup>2</sup>). These findings highlight the inherent flexibility of its perovskite structure, allowing for precise tuning and optimization of its functional properties.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effect of BaZrO3 content on the structure, microstructure, and electrical properties of (K, Na)NbO3-based lead-free ceramics
IF 2.5 4区 材料科学
Applied Physics A Pub Date : 2025-04-18 DOI: 10.1007/s00339-025-08517-8
Le Dai Vuong, Ngo Xuan Cuong, Nguyen Quang Lich, Nguyen Dang Nhat, Le Dinh Hieu, Vo Quang Nha, Le Tran Uyen Tu, Le Van Tan, Trinh Ngoc Dat
{"title":"The effect of BaZrO3 content on the structure, microstructure, and electrical properties of (K, Na)NbO3-based lead-free ceramics","authors":"Le Dai Vuong,&nbsp;Ngo Xuan Cuong,&nbsp;Nguyen Quang Lich,&nbsp;Nguyen Dang Nhat,&nbsp;Le Dinh Hieu,&nbsp;Vo Quang Nha,&nbsp;Le Tran Uyen Tu,&nbsp;Le Van Tan,&nbsp;Trinh Ngoc Dat","doi":"10.1007/s00339-025-08517-8","DOIUrl":"10.1007/s00339-025-08517-8","url":null,"abstract":"<div><p>This study used two-step sintering to prepare lead-free (1–<i>x</i>)[(K<sub>0.48</sub>Na<sub>0.48</sub>Li<sub>0.04</sub>)(Nb<sub>0.95</sub>Sb<sub>0.05</sub>)O<sub>3</sub>]– <i>x</i>BaZrO<sub>3</sub> [(1–<i>x</i>)KNNST–<i>x</i>BZ] ceramic samples with <i>x</i> = 0.0, 0.015, 0.03, 0.045, and 0.060. The influence of the content of BaZrO<sub>3</sub> (BZ) on the structure, microstructure, and physical properties of the (K<sub>0.48</sub>Na<sub>0.48</sub>Li<sub>0.04</sub>)(Nb<sub>0.95</sub>Sb<sub>0.05</sub>)O<sub>3</sub> (KNLNS) ceramic was studied in detail. Experimental results showed that the KNLNS crystal structure transformed from the orthorhombic phase to a rhombohedral phase to construct the new phase boundary near room temperature for 0.03 ≤ <i>x</i> ≤0.045, improving the electrical properties of the ceramic at the optimized BZ content. Raman scattering, X-ray diffraction, scanning electron microscopy, and the electrical properties of the samples showed that the optimal BZ content was 0.03 mol, corresponding to the solubility limit of Ba<sup>2+</sup> and Zr<sup>4+</sup> ions in the KNLNS ceramics. Furthermore, substituting Ba<sup>2+</sup> and Zr<sup>4+</sup> at the A- and B-site induced lattice distortion in the (1–<i>x</i>)KNLNS– <i>x</i>BZ structure to increase the relaxation behavior and decrease the <i>T</i><sub>O−T</sub> values sharply to 45 °C, which was the optimum poling condition that could develop the possible piezoelectric properties. At the optimized BZ content of 0.03 mol, the 0.97KNNST– 0.03BZ ceramic had the best electrical properties: density = 4.56 g/cm<sup>3</sup>, dielectric constant (<i>ε</i><sub>r</sub>) = 1130, electromechanical coupling factors <i>k</i><sub>p</sub> = 0.39 and <i>k</i><sub>t</sub> = 0.40, piezoelectric constant (<i>d</i><sub>33</sub>) = 225 pC/N, remanent polarization (<i>P</i><sub>r</sub>) = 15.2 µC/cm<sup>2</sup>, and normalized strain (<i>d</i><sub>33</sub><sup>*</sup>) = 470 pm/V. The highest <i>Q</i><sub>m</sub> value of 102 was for 0.045 mol BZ.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental study of tensor structure function of deuteron
IF 2.6 3区 物理与天体物理
The European Physical Journal A Pub Date : 2025-04-18 DOI: 10.1140/epja/s10050-025-01558-w
Jiwan Poudel, Alessandro Bacchetta, Jian-Ping Chen, Nathaly Santiesteban
{"title":"Experimental study of tensor structure function of deuteron","authors":"Jiwan Poudel,&nbsp;Alessandro Bacchetta,&nbsp;Jian-Ping Chen,&nbsp;Nathaly Santiesteban","doi":"10.1140/epja/s10050-025-01558-w","DOIUrl":"10.1140/epja/s10050-025-01558-w","url":null,"abstract":"<div><p>The deuteron is the lightest spin-1 nucleus, consisting of a weakly bound system of two spin-<span>(frac{1}{2})</span> nucleons. One intriguing characteristic of the deuteron is the tensor polarized structure, which cannot be naively constructed combining the proton and neutron structure. The tensor structure of the deuteron provides unique insights into the quarks and gluons distributions and their dynamics within the nucleus. It can be studied experimentally through inclusive and semi-inclusive Deep Inelastic Scattering (DIS) of electrons on tensor polarized deuterons. One-dimensional (longitudinal-momentum-dependent) tensor structure functions are extracted from the inclusive DIS, whereas three-dimensional with additional transverse-momentum-dependent tensor structure functions are extracted from the semi-inclusive DIS. Experimentally, achieving high tensor polarization for such measurements has been a challenge. Significant progress has recently been made in enhancing the tensor polarization for polarized deuteron target, opening up a new window for experimental studies of the deuteron tensor structure. In this article, we discuss the tensor structure functions of the deuteron and the experimental schemes to extract these functions at Jefferson Lab, highlighting the potential measurements of the transverse-momentum-dependent tensor structure functions.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 4","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multiple non-linear regression for microwaves characterization of dielectric materials
IF 2.5 4区 材料科学
Applied Physics A Pub Date : 2025-04-18 DOI: 10.1007/s00339-025-08477-z
Hakim Sadou, Tarik Hacib, Yann Le Bihan, Olivier Meyer, Hulusi Acikgoz
{"title":"Multiple non-linear regression for microwaves characterization of dielectric materials","authors":"Hakim Sadou,&nbsp;Tarik Hacib,&nbsp;Yann Le Bihan,&nbsp;Olivier Meyer,&nbsp;Hulusi Acikgoz","doi":"10.1007/s00339-025-08477-z","DOIUrl":"10.1007/s00339-025-08477-z","url":null,"abstract":"<div><p>In this study, we have introduced a new multivariate regression model to solve the inverse problem in microwave characterization of dielectric materials. The probe is an open-ended coaxial line, whereas the dielectric sample is taken at its end. The relative dielectric permittivity (<i>ε</i> = <i>ε'</i>-<i>jε''</i>) is calculated from the measurements of the probe admittance on a broad band frequency (<i>f</i> from 1 MHz to 1.8 GHz). In order to fit the regression coefficients of the Multiple Linear Regression (MLR) model (inverse problem), a data set is generated by solving the direct problem for the probe admittance (<i>Y</i>(<i>f</i>) = <i>G</i>(<i>f</i>) + <i>jB</i>(<i>f</i>)) using Finite Elements Method (FEM). Unfortunately, the MLR model with the original three descriptors (<i>f</i>, <i>G</i> and <i>B</i>) as <b><i>X</i></b> bloc and <i>ε'</i> or <i>ε''</i> as response (<b><i>Y</i></b> bloc) has given very bad results. In order to integrate the nonlinearity between inputs and output, more descriptors have been generated mathematically from the original ones (for example: 1<i>/f</i>, <i>B</i>/<i>f</i><sup>2</sup>, <i>fB</i>, 1/<i>B</i>, <i>G</i>/<i>f</i>, <i>f</i><sup>2</sup><i>G/B</i>, <i>fG</i><sup>2</sup><i>B</i>, <i>f</i><sup>2</sup><i>GB</i><sup>2</sup>, … etc.) using the extended <b><i>X</i></b> bloc method and the Multiple Non-Linear Regression (MNLR) model is created. In order to choose the most relevant or statistically significant descriptors, stepwise selection is adopted. Inversion results of experimental measurements on an ethanol sample have proved that the dielectric permittivity can be measured with excellent accuracy using MNLR as inversion tool.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
NiMOF-FeOOH/NF composites for highly efficient oxygen evolution reaction
IF 2.5 4区 材料科学
Applied Physics A Pub Date : 2025-04-18 DOI: 10.1007/s00339-025-08498-8
Yingying Li, Xingyue Tang, Boyang Li, Yani Luo, Yijing Wang, Xiaolian Wang
{"title":"NiMOF-FeOOH/NF composites for highly efficient oxygen evolution reaction","authors":"Yingying Li,&nbsp;Xingyue Tang,&nbsp;Boyang Li,&nbsp;Yani Luo,&nbsp;Yijing Wang,&nbsp;Xiaolian Wang","doi":"10.1007/s00339-025-08498-8","DOIUrl":"10.1007/s00339-025-08498-8","url":null,"abstract":"<div><p>Metal-organic frameworks (MOFs) have emerged as promising catalysts for the oxygen evolution reaction (OER) in water electrolysis. This study synthesizes a nickel-based MOF on a nickel foam substrate (NiMOF/NF) via a solvothermal method and fabricates NiMOF-FeOOH/NF composites through Fe electrodeposition. The NiMOF-FeOOH<sub>600</sub>/NF composite, prepared with a 600 s electrodeposition time, exhibits an overpotential of 320 mV at 20 mA·cm<sup>-2</sup> and a Tafel slope of 126 mV·dec<sup>-1</sup>. Compared to unmodified NiMOF/NF, the overpotential was reduced by 320 mV and the Tafel slope by 146 mV dec<sup>-1</sup>. In addition, no significant performance degradation was observed during the 40 h stability test. Further results demonstrated that deposition of Fe ions significantly improved the intrinsic conductivity of NiMOF/NF, enabling more efficient charge transfer during the OER process. Additionally, the modified FeOOH surface morphology increased the number of accessible active sites and enhanced the exposure of catalytic centers. In summary, these structural and electronic modifications synergistically improve the overall catalytic performance and have guiding significance for the application of MOF to OER.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spherical-shaped ZnO nanoparticles and their diverse surface morphological applications in various biological applications against ROS
IF 2.5 4区 材料科学
Applied Physics A Pub Date : 2025-04-18 DOI: 10.1007/s00339-025-08504-z
P. Madhan Kumar, R. Babujanarthanam, R. Tamil Selvi, R. Ganesamoorthy, S. Jesu Jaya Sudan, K. Kasthuri, R. Parameswari
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