Journal of Rare Earths最新文献

{"title":"Enhancing polishing property of CeO2-based abrasives by co-doping with lanthanide and fluorine","authors":"Guangda Han,&nbsp;Tian Xing,&nbsp;Dingai Xiang,&nbsp;Min Cao,&nbsp;You Xue,&nbsp;Ziyu Yang,&nbsp;Jilei Zhu,&nbsp;Junjie Xu","doi":"10.1016/j.jre.2025.08.005","DOIUrl":"10.1016/j.jre.2025.08.005","url":null,"abstract":"<div><div>The development of CeO₂-based abrasives that simultaneously deliver faster processing speeds and smoother surfaces remains a significant challenge for semiconductor polishing applications, as it is difficult to make further progress by optimization of solely Ce³⁺ content or particle size. In this work, we engineered lanthanide and fluorine co-doped CeO₂-based abrasives to concurrently optimize both particle size and Ce³⁺ content. Fluorine doping effectively reduces the particle size to approximately 50 nm while simultaneously enhances the Ce³⁺ concentration. Synergistic optimization is achieved in F-doped Ce_0.8La_0.2O_<em>x</em> and Ce_0.8Pr_0.2O_<em>x</em> abrasives due to the additional enhancement of Ce³⁺ content and generation of rare earth oxyfluorides, which can promote the polishing efficiency. Notably, F-doped Ce_0.8La_0.2O_<em>x</em> and Ce_0.8Pr_0.2O_<em>x</em> abrasives show material removal rates of 540.42 and 789.15 nm/min, which are 1.57 and 2.3 times that of CeO₂. K9 substrate polished by F-doped Ce_0.8La_0.2O_<em>x</em> and Ce_0.8Pr_0.2O_<em>x</em> abrasives exhibits an average surface roughness of 0.091 and 0.018 nm, which are lower than 0.337 nm achieved by pristine CeO₂. The results offer guidance for the design and preparation of high-performance CeO₂-based abrasives.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 7","pages":"Pages 2186-2194"},"PeriodicalIF":9.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148530099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphology engineered PtSn/CeO2 catalysts for oxidative dehydrogenation of propane with carbon dioxide","authors":"Chao Peng,&nbsp;Guoqing Yang,&nbsp;Hanqing Ge,&nbsp;Zhongwen Liu","doi":"10.1016/j.jre.2025.07.022","DOIUrl":"10.1016/j.jre.2025.07.022","url":null,"abstract":"<div><div>The oxidative dehydrogenation of propane with carbon dioxide (CO₂-ODP) has received significant attention as an environmentally benign route for the propene production. However, the development of high-performance catalysts remains a critical challenge hindering its industrial implementation. In this work, CeO₂ samples with distinct morphologies resembling flowers (F-CeO₂), rods (R-CeO₂), spindles (SP-CeO₂), and sheets (SH-CeO₂) were successfully synthesized by simply changing the hydrothermal conditions, and the shape-dependent impact of oxygen-defect contents over CeO₂ on the structural and electronic properties of the impregnated PtSn/CeO₂ catalysts was studied for CO₂-ODP. Characterizations reveal a positive correlation between the Pt electron density and oxygen-defect contents in an increasing order of PtSn/F-CeO₂ &lt; PtSn/R-CeO₂ &lt; PtSn/SP-CeO₂ &lt; PtSn/SH-CeO₂. In the case of the catalytic results, the same changing pattern is observed for the initial C₃H₈ conversion and C₃H₆ selectivity. Moreover, the highest initial propene space-time yield of 0.71 <span><math><mrow><msub><mtext>kg</mtext><mrow><mo>(</mo><mrow><msub><mi>C</mi><mn>3</mn></msub><msub><mi>H</mi><mn>6</mn></msub></mrow><mo>)</mo></mrow></msub><mo>/</mo><mrow><mo>(</mo><mrow><msub><mtext>kg</mtext><mrow><mo>(</mo><mtext>cat</mtext><mo>)</mo></mrow></msub><mo>·</mo><mi>h</mi></mrow><mo>)</mo></mrow></mrow></math></span> achieving over the PtSn/SH-CeO₂ catalyst is still retained at 0.35 <span><math><mrow><msub><mtext>kg</mtext><mrow><mo>(</mo><mrow><msub><mi>C</mi><mn>3</mn></msub><msub><mi>H</mi><mn>6</mn></msub></mrow><mo>)</mo></mrow></msub><mo>/</mo><mrow><mo>(</mo><mrow><msub><mtext>kg</mtext><mrow><mo>(</mo><mtext>cat</mtext><mo>)</mo></mrow></msub><mo>·</mo><mi>h</mi></mrow><mo>)</mo></mrow></mrow></math></span> after a time on stream of 200 min. This performance surpasses those of most reported CO₂-ODP catalysts. The morphology-dependent catalytic phenomena are attributed mainly to the varied activation energies of CO₂-ODP, which are determined by the oxygen defect-induced electronic and structural interplay between Pt, Sn, and CeO₂. These findings provide valuable insights for the rational design and optimization of Pt-based catalysts for CO₂-ODP, particularly in the selection of oxide supports.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 7","pages":"Pages 2106-2118"},"PeriodicalIF":9.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147330727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel negative thermal expansion Sc2W3O12: Yb, Ho phosphor showing remarkable emission color shifting from green to red with increasing temperature for favorable visual optical thermometry","authors":"Ziying Wang,&nbsp;Xinyu Li,&nbsp;Xuyan Xue,&nbsp;Qiushi Wang,&nbsp;Xuejiao Wang,&nbsp;Ji-Guang Li","doi":"10.1016/j.jre.2025.08.012","DOIUrl":"10.1016/j.jre.2025.08.012","url":null,"abstract":"<div><div>Achieving naked-eye visual optical thermometry and effectively suppressing the thermal-quenching effect are essential for the application of non-contact optical temperature sensors in dangerous environments. This paper reports a highly efficient upconversion (UC) phosphor with remarkable color variation from green to red versus temperature under 980 nm excitation based on the anomalous thermal dependence of Sc₂W₃O₁₂: 0.18Yb³⁺, 0.02Ho³⁺. Taking advantage of the negative thermal expansion (NTE) properties of the material, the energy transfer (ET) between dopant ions is enhanced by the lattice contraction at high temperatures, and the UC luminescence of Ho³⁺ ions is enhanced by a factor of 21 as the temperature rises from 298 to 573 K. Compared with other thermometric materials, this phosphor has higher sensitivity 2.39%/K@398 K (fluorescence intensity ratio mode) and 1.95%/K@473 K (fluorescence lifetime mode). As the temperature increases, Sc₂W₃O₁₂: 0.18Yb³⁺, 0.02Ho³⁺ exhibits thermochromic properties, with an extremely large chromaticity shift of 347 × 10⁻³ from green to red, and the luminous color can be readily recognized by the naked eye and read out the temperature. The current research strategy provides new insights for further exploration of high-performance and multifunctional UC luminescent materials.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 7","pages":"Pages 2028-2037"},"PeriodicalIF":9.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148529857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sequential installation of luminescent units in a multivariate Zr-MOF for ratiometric thermometry with optimal performance","authors":"Yu Yang,&nbsp;Jiaojiao Yang,&nbsp;Xiaoman Zhang,&nbsp;Yuting Yang,&nbsp;Lingxue Li,&nbsp;Lin Zhang,&nbsp;Hongjun Li,&nbsp;Yating Wan,&nbsp;Yabing He,&nbsp;Dian Zhao","doi":"10.1016/j.jre.2025.08.007","DOIUrl":"10.1016/j.jre.2025.08.007","url":null,"abstract":"<div><div>Metal–organic frameworks (MOFs) have emerged as promising ratiometric fluorescent thermometers owing to abundant luminescent units and ease of functionalization. However, they still face challenges such as the incompatibility of different luminescent centers and the instability of post-functionalized MOFs. Herein, we demonstrate a sequential installation strategy to decorate a robust Zr-MOF (PCN-700) with diverse luminescent units including organic molecules and rare earth ions. Through the coordination of 4,4′-(2,1,3-benzothiadiazole-4,7-diyl)bis[benzoic acid] (BTDB) and 2,2'-bipyridine-5,5'-dicarboxylic acid (BPYDC) to unsaturated Zr sites in PCN-700, followed by chelation of Eu³⁺ ions to BPYDC, the host-guest composites with programmable compositions were engineered. Crucially, the assembly sequence of BTDB, BPYDC and Eu³⁺ dictates their spatial arrangement in PCN-700, and thus influences the temperature sensing performance. PCN-700-BTDB-BPYDC@Eu³⁺ (<strong>7</strong>), assembled through sequential incorporation of luminescent units following a descending size order (BTDB &gt; BPYDC &gt; Eu³⁺), achieves the optimal temperature sensing performance. This configuration generates green fluorescence from BTDB and red fluorescence from Eu³⁺-chelated BPYDC, enabling dual-emission thermometry across the physiological temperature range (298–358 K) with good relative sensitivity (1.54%/K at 339 K) and excellent cyclability after five cycles. The work establishes a paradigm for spatially resolved multi-emitter integration in MOFs, advancing the design of stable optical rare earth-based sensors through high-precision host-guest engineering.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 7","pages":"Pages 2038-2046"},"PeriodicalIF":9.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148529858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rare earth elements in cast aluminum alloys: Microstructural control and performance enhancement","authors":"Bo Wu,&nbsp;Shuaibin Shang,&nbsp;Luyong Cai,&nbsp;Hongqun Tang,&nbsp;Bin Lei,&nbsp;Zhengbing Xu","doi":"10.1016/j.jre.2025.07.028","DOIUrl":"10.1016/j.jre.2025.07.028","url":null,"abstract":"<div><div>Aluminum alloys have been widely used in aerospace, automotive and electronics industries due to their light weight and high strength. However, traditional aluminum alloys often have problems such as coarse grains and uneven phases, which limit the overall performance of aluminum alloys. The addition of rare earth elements (REs) to aluminum alloys has been proven to be highly effective in improving their microstructure, mechanical properties, wear resistance and corrosion behavior. This paper mainly focuses on cast aluminum alloys and reviews the effects of rare earths on grain refinement, precipitation strengthening and stable formation of intermetallic compounds in aluminum alloys, and describes the mechanism of action of rare earth elements. These elements can reduce grain size by up to 50%, enhance tensile strength, and improve high-temperature stability. They also significantly enhance wear resistance by reducing the coefficient of friction and inhibiting the abrasive/adhesive wear mechanism. Meanwhile, the refinement of grains and the formation of new phases both affect corrosion resistance by influencing the corrosion potential. Despite these benefits, excessive rare earths may lead to brittle or unfavorable phase formation, so precise dose control is required. The future research directions are prospected, including exploring the synergistic effects of various rare earths, integrating advanced processing technologies, and optimizing the extreme environments of rare earth modified alloys. Overall, this work provides critical insights into the mechanisms and applications of REs in aluminum alloys, guiding the development of high-performance materials for industrial applications.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 7","pages":"Pages 1994-2009"},"PeriodicalIF":9.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148530128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Organophosphonic acid nitrilotri: a spatially matched depressant of bastnaesite for separation from fluorite","authors":"Xuan Wang,&nbsp;Wei Sun,&nbsp;Jing Zhao,&nbsp;Haisheng Han","doi":"10.1016/j.jre.2025.06.019","DOIUrl":"10.1016/j.jre.2025.06.019","url":null,"abstract":"<div><div>Nitrilotrimethylene phosphonic acid (nitrilotri, ATMP) enables effective flotation separation of fluorite from bastnaesite through selective surface modification. A multi-technique investigation including micro-flotation tests, zeta potential measurements, contact angle analysis, adsorption studies, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS) characterization, and quantum chemical calculations can elucidate the inhibition mechanism. Single-mineral and synthetic mixed-ore flotation experiments demonstrate ATMP's selective inhibition toward bastnaesite, achieving &gt;70% fluorite recovery with &lt;12% bastnaesite recovery at optimal dosage (40 g/t). Mechanistic studies reveal that ATMP preferentially chemisorbs at Ce³⁺ active sites on bastnaesite surfaces through dual mechanisms: Firstly, nitrilotri undergoes chemisorption with Ce active sites on the bastnaesite surface, forming Ce-PO(OH)₂ complexes that exhibit strong adsorption on the mineral surface. Secondly, the three phosphonate groups of nitrilotri are arranged in a triangular configuration with an interatomic distance of 0.7512 nm, which spatially aligns with the Ce sites (0.7186 nm interatomic spacing) on bastnaesite. Each nitrilotri molecule chemisorbs with three Ce sites, yielding an adsorption energy of −294.624 kJ/mol, being indicative of a thermodynamically favorable interaction. This site-specific adsorption generates a hydrophilic Ce–phosphonate interface that destabilizes collector (NaOL) adsorption, reducing bastnaesite surface hydrophobicity by 42.78% (contact angle decreases from 65.23° to 22.45°). Conversely, nitrilotri exhibits limited interaction with fluorite due to geometric mismatch at Ca²⁺ sites, allowing NaOL-dominated hydrophobization to persist. The fundamental understanding of ligand-receptor complementarity presented here provides a promising strategy for rare earth/fluorite separation in industrial beneficiation circuits.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 7","pages":"Pages 2239-2248"},"PeriodicalIF":9.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148530103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic potential of peptide-lanthanide architectures for biomedical applications","authors":"Jean Claude Munyemana,&nbsp;Xiuxia Sun,&nbsp;Eskandar Qaed,&nbsp;Jianxi Xiao","doi":"10.1016/j.jre.2025.10.013","DOIUrl":"10.1016/j.jre.2025.10.013","url":null,"abstract":"<div><div>Peptide-conjugated lanthanide-based materials are emerging as highly promising platforms in molecular biosensing and bioimaging, offering new opportunities for advancing diagnostic technologies in biomedical applications. The unique photophysical (e.g., sharp emission bands, long luminescence lifetimes) and magnetic (e.g., paramagnetism, high relaxivity) properties of lanthanide ions and nanomaterials, when combined with the molecular specificity and biocompatibility of peptides, create a synergistic system that significantly enhances detection sensitivity and imaging resolution. Peptides, owing to their structural diversity and the chemical functionalities of their amino acid residues, can be designed to exhibit high selectivity toward specific molecular targets. Their inherent modularity and ease of chemical modification make them ideal ligands for conjugation with lanthanides, facilitating the fabrication of highly tunable diagnostic probes. This synergy enables precise molecular recognition, selective targeting, and efficient signal transduction in both biosensing platforms and imaging modalities such as fluorescence, magnetic resonance imaging (MRI), and computed tomography (CT). This review provides an informative and comprehensive overview of recent advances in peptide-lanthanide hybrid systems, covering their design strategies, synthesis approaches, functionalization techniques, and biomedical applications. We examine their applicability across diverse platforms, including biosensing technologies, advanced imaging modalities, targeted drug delivery systems, and tissue scaffolding. Key developments in these areas are highlighted to emphasize their emerging significance in biomedical applications. Furthermore, we critically assess the current challenges and knowledge gaps in the field, proposing future directions for research at the intersection of bioorganic chemistry, materials science, and molecular diagnostics. By illuminating the synergistic interactions between peptides and lanthanide-based materials, this work underscores their transformative potential in next-generation biosensing and bioimaging applications.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 7","pages":"Pages 1969-1993"},"PeriodicalIF":9.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148530160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multifunctional self-oxygenating UCNP–chlorin e6–cyanobacteria nanoplatform: NIR-triggered photodynamic and photothermal therapy with efficacy against periodontitis-related bacteria","authors":"Shimeng Wang,&nbsp;Wenyue Sun,&nbsp;Rui Sun,&nbsp;Jiawei Li,&nbsp;Jiheng Cui,&nbsp;Jiahang Wei,&nbsp;Haipeng Liu,&nbsp;Biao Dong","doi":"10.1016/j.jre.2025.09.009","DOIUrl":"10.1016/j.jre.2025.09.009","url":null,"abstract":"<div><div>Antibacterial photodynamic therapy (aPDT) exhibits promise in bacterial infection models. However, its effectiveness is often limited in scenarios of bacterial infection within hypoxic environments such as deep periodontal pockets. The present study aims to develop a method to increase the efficacy of aPDT by combining rare earth upconversion nanoparticles (UCNPs) with cyanobacteria, forming cyanobacterial oxygen photosynthesis nanoplatform. In addition, due to the non-photochemical quenching (NPQ) mechanism in algae, cyanobacteria convert excess light energy into thermal energy to achieve synergistic aPDT/photothermal therapy (PTT) effects. Two types of UCNPs were loaded with cyanobacterial cells, including NaYF₄:Yb³⁺,0.2 mol%Tm³⁺ with blue emission for triggering photosynthesis, and NaErF₄:0.5 mol%Tm³⁺@NaYF₄:20 mol%Yb³⁺ with red emission for exciting the photosensitizer Chlorin e6 (Ce6). The resulting nanoplatform is referred to as Cyan@UCNPs/Ce6. Both the blue light required for oxygen photosynthesis and red light for aPDT are generated via absorption and upconversion of near-infrared (NIR) light, which can deeply penetrate the tissue. Notably, both <em>in vitro</em> and <em>in vivo</em> experiments demonstrate the remarkable biocompatibility and potent synergistic aPDT/PTT effects. Compared with non-NIR irradiation, the metabolic activities of two common periodontitis bacteria (<em>F.nucleatum</em>, <em>P.gingivalis</em>) decrease from 0.80 ± 0.04 and 0.71 ± 0.03 to 0.30 ± 0.01 and 0.17 ± 0.01, respectively (<em>p</em> &lt; 0.05). The findings of this study demonstrate that the developed Cyan@UCNPs/Ce6 nanoplatform is a promising strategy for photoresponsive synergistic aPDT/PTT in the treatment of periodontitis.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 7","pages":"Pages 2057-2072"},"PeriodicalIF":9.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147332259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural and magnetic characterizations of antiferromagnetic RE3PO7 (RE = Gd, Tb, Dy, Ho) phosphates featuring large conventional and inverse cryogenic magnetocaloric effects","authors":"Wang Chen,&nbsp;Junli Lin,&nbsp;Zhenqian Zhang,&nbsp;Lingwei Li","doi":"10.1016/j.jre.2025.09.035","DOIUrl":"10.1016/j.jre.2025.09.035","url":null,"abstract":"<div><div>The magnetocaloric (MC) properties in various type rare earth (RE)-based magnetic materials have been intensively characterized recently, aimed to develop high-performing materials for cryogenic magnetic cooling application and deepen our understanding of their intrinsic magneto properties. In this work, we synthesized the RE₃PO₇ (RE = Gd, Tb, Dy, Ho) phosphates using traditional high-temperature solid-state method and characterized their structure, elemental valence states, magnetic properties, and MC performances. All of these RE₃PO₇ phosphates possess monoclinic symmetry with the <em>C</em>2/<em>m</em> (No. 12) space group and order antiferromagnetically around the Neel temperatures (<em>T</em>_N) of 4.1, 3.9, 8.3 and 2.5 K for Gd₃PO₇, Tb₃PO₇, Dy₃PO₇ and Ho₃PO₇ phosphates, respectively. The consistent elements in these RE₃PO₇ phosphates are distributed uniformly and present as RE³⁺, P⁵⁺, and O²⁻ chemical states, respectively. Meanwhile, they exhibit large conventional and inverse cryogenic MC effects, attributed to their antiferromagnetic ground state and unique field-induced first-order magnetic phase transition below their own <em>T</em>_N. Moreover, under 0–7 T magnetic field variation, we identified their conventional MC performances using magnetic entropy change/temperature-averaged entropy change (5 K) and relative cooling power, which are 18.81/17.96 J/(kg·K) and 289.93 J/kg for Gd₃PO₇, 11.51/11.11 J/(kg·K) and 226.00 J/kg for Tb₃PO₇, 21.70/20.73 J/(kg·K) and 471.67 J/kg for Dy₃PO₇, and 18.88/18.42 J/(kg·K) and 434.56 J/kg for Ho₃PO₇, respectively. These conventional MC parameters are comparable to those of some reported cryogenic RE-based MC materials, indicating that RE₃PO₇ phosphates may have limited potential for low-temperature magnetic cooling applications under certain conditions.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 7","pages":"Pages 2129-2139"},"PeriodicalIF":9.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148530164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical performances in ceramic fuel cells electrolyte using spinel ferrite ZYF and fluorite GDC hetero-composite","authors":"Junjiao Li,&nbsp;Asma Noor,&nbsp;Maryam Al Huwayz,&nbsp;Wenyu Li,&nbsp;Qiyan Xu,&nbsp;Annan Dou,&nbsp;Youpeng Chen,&nbsp;Muhammad Yousaf,&nbsp;Yuzheng Lu","doi":"10.1016/j.jre.2025.09.027","DOIUrl":"10.1016/j.jre.2025.09.027","url":null,"abstract":"<div><div>Recent developments in semiconductor-based electrolyte materials for solid oxide fuel cells (SOFCs) aim to enhance efficiency, mitigate degradation, and lower costs, which are crucial for advancing low-temperature SOFC technology. However, achieving high oxide ion conductivity (O²⁻) and long-term durability remains a challenge for semiconductor-based ionic electrolytes at low operational temperatures. To address this, a hetero-composite electrolyte comprising ZnYb_0.2Fe_1.80O₄ (ZYF) and fluorite-based Ce_0.9Gd_0.1O_<em>x</em> (GDC) was developed to enhance ionic conductivity and facilitate rapid ion transport in ZYF-GDC at temperatures below 550 °C. The phase composition, surface and interface characteristics, and ionic conductivity behavior of the ZYF-GDC heterostructure were analyzed. The results demonstrate that the ZYF-GDC hetero-composite exhibits a high density of surface oxygen vacancies, leading to an oxide ion conductivity of 0.16 S/cm at 520 °C. The fuel cell with the ZYF-GDC electrolyte maintains stable electrochemical performance, achieving a peak power density (PPD) of 897 mW/cm², and demonstrates long-term durability, maintaining stable performance for over 80 h at 520 °C without any degradation. Additionally, the hetero-composite exhibits a high open-circuit voltage (OCV) of over 1.0 V at 520 °C, indicating its potential as a stable and high-performance electrolyte for low-temperature SOFCs.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"44 7","pages":"Pages 2158-2165"},"PeriodicalIF":9.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148530166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}