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Design of a theranostic Gd (III)–Cu (I) complex to inhibit growth and metastasis of triple-negative breast cancer Gd (III) -Cu (I)复合物抑制三阴性乳腺癌生长和转移的设计
IF 9.6 1区 材料科学
Rare Metals Pub Date : 2025-01-09 DOI: 10.1007/s12598-024-03058-0
Xue-Yu Man, Ming-Hui Zhu, Shan-He Li, Wen-Juan Li, Gang Xu, Zhen-Lei Zhang, Xiao-Yang Wu, Hong Liang, Feng Yang
{"title":"Design of a theranostic Gd (III)–Cu (I) complex to inhibit growth and metastasis of triple-negative breast cancer","authors":"Xue-Yu Man,&nbsp;Ming-Hui Zhu,&nbsp;Shan-He Li,&nbsp;Wen-Juan Li,&nbsp;Gang Xu,&nbsp;Zhen-Lei Zhang,&nbsp;Xiao-Yang Wu,&nbsp;Hong Liang,&nbsp;Feng Yang","doi":"10.1007/s12598-024-03058-0","DOIUrl":"10.1007/s12598-024-03058-0","url":null,"abstract":"<div><p>For precise personalized treatment of triple-negative breast cancer (TNBC) and inhibition of its metastasis, we innovatively designed and synthesized a gadolinium (III)–copper(I) complex (<b>GdCu</b>) with remarkable performance in T<sub>1</sub>-weighted magnetic resonance imaging (MRI) and cytotoxicity to TNBC cells. In addition, we constructed a <b>GdCu</b>@apoferritin (AFt) nanoparticles (NPs) delivery system. <b>GdCu</b> and <b>GdCu</b>@AFt NPs significantly inhibited the migration and invasion of MDA-MB-231 cells in vitro. <b>GdCu</b> can significantly inhibit the growth and metastasis of TNBC in vivo. <b>GdCu</b>@AFt NPs not only improved the targeting ability of <b>GdCu</b>, showed an enhanced performance of MRI and tumor-growth inhibition, but also decreased the systemic toxicity of <b>GdCu</b> in vivo. We demonstrated that <b>GdCu</b> and <b>GdCu</b>@AFt NPs prevented the growth and metastasis of TNBC by inducing mitochondria-mediated apoptosis and inhibiting cancer cell stemness. The remarkable MRI, anticancer and anti-metastasis capabilities of <b>GdCu</b> and <b>GdCu</b>@AFt NPs make them promising agents for the targeted theranostics of TNBC.</p></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 4","pages":"2589 - 2604"},"PeriodicalIF":9.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Large elastocaloric effect with high refrigeration efficiency in a polycrystalline Co50V35Ga15 Heusler alloy Co50V35Ga15多晶Heusler合金具有高制冷效率的大弹性热效应
IF 9.6 1区 材料科学
Rare Metals Pub Date : 2025-01-09 DOI: 10.1007/s12598-024-03086-w
Hong-Wei Liu, Cong Liu, Zhe Li, Hao-Hao Yang, Yuan-Lei Zhang, Kun Xu, Yi-Ming Cao, Yong-Sheng Liu, Zong-Bin Li, Liang Zuo
{"title":"Large elastocaloric effect with high refrigeration efficiency in a polycrystalline Co50V35Ga15 Heusler alloy","authors":"Hong-Wei Liu,&nbsp;Cong Liu,&nbsp;Zhe Li,&nbsp;Hao-Hao Yang,&nbsp;Yuan-Lei Zhang,&nbsp;Kun Xu,&nbsp;Yi-Ming Cao,&nbsp;Yong-Sheng Liu,&nbsp;Zong-Bin Li,&nbsp;Liang Zuo","doi":"10.1007/s12598-024-03086-w","DOIUrl":"10.1007/s12598-024-03086-w","url":null,"abstract":"<div><p>Superelastic martensitic transformation (MT) confers a considerable elastocaloric response to shape memory alloys, but the significant hysteretic loss cripples the energy conversion efficiency. In the present work, large elastocaloric effect with high refrigeration efficiency is realized in a polycrystalline Co<sub>50</sub>V<sub>35</sub>Ga<sub>15</sub> Heusler alloy. Experimental results show that the studied alloy undergoes a paramagnetic type MT from <i>L</i>2<sub>1</sub> cubic austenite to <i>D</i>0<sub>22</sub> tetragonal martensite with a small thermal hysteresis <span>((Delta T_{{{text{hys}}}} ))</span> of ~ 3 K. By carefully examining the strain rate dependence of superelastic response, it is also found that the stress hysteresis <span>((Delta sigma_{{{text{hys}}}} ))</span> consists of two components including intrinsic stress hysteresis <span>((Delta sigma_{{{text{hys}}}}^{{{text{int}}{.}}} ))</span> caused by inherent attribute of MT and extrinsic stress hysteresis <span>((Delta sigma_{{{text{hys}}}}^{{{text{ext}}{.}}} ))</span> aroused by applied strain rate. Accordingly, we put forward a strain relaxation equation to separate the relative contributions between <span>(Delta sigma_{{{text{hys}}}}^{{{text{int}}{.}}})</span> and <span>(Delta sigma_{{{text{hys}}}}^{{{text{ext}}{.}}})</span> quantitatively, which demonstrates that a small <span>(Delta T_{{{text{hys}}}})</span> is conducive to substantial decrease in <span>(Delta sigma_{{{text{hys}}}}^{{{text{int}}{.}}})</span>. Moreover, associated with stress-induced superelastic MT, large reversible adiabatic temperature changes <span>((Delta T_{{{text{ad}}}} ))</span> higher than 11 K are achieved under an applied strain of 6.5% over a temperature range of at least 60 K. With the combination of a large elastocaloric cooling capacity and a low energy dissipation, significant improvements in refrigeration efficiency can be obtained in a wide strain range, being superior to those reported in most of typical elastocaloric materials near room temperature.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 4","pages":"2767 - 2777"},"PeriodicalIF":9.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Polyphenol-metal coordination derived high-entropy alloy as bifunctional oxygen electrocatalyst for Zn-air batteries 多酚金属配位衍生的高熵合金作为锌空气电池双功能氧电催化剂
IF 9.6 1区 材料科学
Rare Metals Pub Date : 2025-01-09 DOI: 10.1007/s12598-024-03065-1
Meng-Di Hao, Qin Li, Jing-Han Sun, Deng Liu, Hua-Long Yu, Rui Liu
{"title":"Polyphenol-metal coordination derived high-entropy alloy as bifunctional oxygen electrocatalyst for Zn-air batteries","authors":"Meng-Di Hao,&nbsp;Qin Li,&nbsp;Jing-Han Sun,&nbsp;Deng Liu,&nbsp;Hua-Long Yu,&nbsp;Rui Liu","doi":"10.1007/s12598-024-03065-1","DOIUrl":"10.1007/s12598-024-03065-1","url":null,"abstract":"<p>High-entropy alloy (HEA) nanoparticles (NPs) have attracted great attention in electrocatalysis due to their tailorable complex compositions and unique properties. Herein, we introduce Fe, Co, Ni, Cr and Mn into the metal-polyphenol coordination system to prepare HEA NPs enclosed in N-doped carbon (FeCoNiCrMn) with great potential for catalyzing oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The unique high-entropy structural characteristics in FeCoNiCrMn facilitate effective interplay between metal species, leading to improved ORR (<i>E</i><sub>1/2</sub> = 0.89 V) and OER (<i>η</i> = 330 mV, <i>j</i> = 10 mA·cm<sup>−2</sup>) activity. Additionally, FeCoNiCrMn exhibits excellent open-circuit voltage (1.523 V), power density (110 mW·cm<sup>−2</sup>) and long-term durability, outperforming Pt/C + IrO<sub>2</sub> electrodes as a cathode catalyst in Zn-air batteries (ZABs). Such polyphenol-assisted alloying method broadens and simplifies the development of HEA electrocatalysts for high-performance ZABs.</p>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 4","pages":"2836 - 2844"},"PeriodicalIF":9.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Cooperative enhancement of tribological and electrical properties of copper composites by decorating graphene with GQDs 石墨烯修饰GQDs对铜复合材料摩擦学和电学性能的协同增强
IF 9.6 1区 材料科学
Rare Metals Pub Date : 2025-01-09 DOI: 10.1007/s12598-024-03096-8
Zhong-Hua Li, Shuang-Yin Zhang, Liang Liu, Rui Bao, Jian-Hong Yi, Cai-Ju Li, Yi-Chun Liu, Xiao-Feng Chen, Zun-Yan Xu, Ke Chu
{"title":"Cooperative enhancement of tribological and electrical properties of copper composites by decorating graphene with GQDs","authors":"Zhong-Hua Li,&nbsp;Shuang-Yin Zhang,&nbsp;Liang Liu,&nbsp;Rui Bao,&nbsp;Jian-Hong Yi,&nbsp;Cai-Ju Li,&nbsp;Yi-Chun Liu,&nbsp;Xiao-Feng Chen,&nbsp;Zun-Yan Xu,&nbsp;Ke Chu","doi":"10.1007/s12598-024-03096-8","DOIUrl":"10.1007/s12598-024-03096-8","url":null,"abstract":"<div><p>A novel approach of decorating graphene surface with graphene quantum dots (abbreviated as GQDs@Gr) was presented to achieve superior tribological properties in Gr/Cu composites. The prepared GQDs@Gr hybrid reinforcement possessed superior dispersion and had achieved strong interface bonding with Cu matrix. GQDs@Gr/Cu composite showed a good combination of wear resistance and electrical conductivity due to the synergistic effect of GQDs and Gr. Specifically, the coefficient of friction (COF) was reduced to 0.3, the wear rate (WR) was 2.13 × 10<sup>–5</sup> mm<sup>3</sup>·N<sup>−1</sup>·m<sup>−1</sup> (only a quarter of pure copper), and maintained the electrical conductivity of 96.5%IACS (international annealed copper standard). As a result, delamination, fracture, and plow furrows on the wear surface of Gr/Cu composite indicate that fatigue and abrasive adhesive wear are the main wear mechanisms. Wear surface lubrication film and strong interface bonding ensure better comprehensive performance of GQDs@Gr/Cu composite.</p></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 4","pages":"2672 - 2681"},"PeriodicalIF":9.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Enhancing performance of proton ceramic fuel cells through fluorine-doped perovskite oxides 通过掺氟钙钛矿氧化物提高质子陶瓷燃料电池的性能
IF 9.6 1区 材料科学
Rare Metals Pub Date : 2025-01-09 DOI: 10.1007/s12598-024-03115-8
Wen-Huai Li, Yong-Xin Li, Yan Yang, Yang-Feng Song, Wen-Xin Liu, Wei-Feng Chen, Yao-Ji Chen, Feng-Ping Yu, Chun-Liang Ge, Yu Guo, Ran Ran, Wei Zhou
{"title":"Enhancing performance of proton ceramic fuel cells through fluorine-doped perovskite oxides","authors":"Wen-Huai Li,&nbsp;Yong-Xin Li,&nbsp;Yan Yang,&nbsp;Yang-Feng Song,&nbsp;Wen-Xin Liu,&nbsp;Wei-Feng Chen,&nbsp;Yao-Ji Chen,&nbsp;Feng-Ping Yu,&nbsp;Chun-Liang Ge,&nbsp;Yu Guo,&nbsp;Ran Ran,&nbsp;Wei Zhou","doi":"10.1007/s12598-024-03115-8","DOIUrl":"10.1007/s12598-024-03115-8","url":null,"abstract":"<div><p>Proton ceramic fuel cell efficiently converts chemical energy into electrical energy, representing a pivotal component of future energy systems. However, its current performance is hindered by limitations in cathode and electrolyte materials, thereby impeding commercialization. Anion doping emerges as a promising strategy to enhance the electrochemical efficiency of perovskite-based cathodes and electrolytes. However, integrating this approach within a single-cell structure still requires further research. In this study, F-doped perovskite oxides BaCo<sub>0.4</sub>Fe<sub>0.4</sub>Zr<sub>0.1</sub>Y<sub>0.1</sub>O<sub>2.9-<i>δ</i></sub>F<sub>0.1</sub> (BCFZYF) and BaZr<sub>0.1</sub>Ce<sub>0.7</sub>Y<sub>0.1</sub>Yb<sub>0.1</sub>O<sub>2.9-<i>δ</i></sub>F<sub>0.1</sub> (BZCYYbF) were synthesized for use as the cathode and electrolyte, respectively, in proton ceramic fuel cells. Our findings demonstrate that F-doped perovskite oxides exhibit superior electrochemical performance and enhanced structural stability. Furthermore, doping both electrodes and electrolytes with F ions improves their interfacial compatibility. The cell configuration BCFZYF | BZCYYbF | Ni-BZCYYbF achieved a peak power density of 998 mW·cm<sup>−2</sup> at 650 °C using H<sub>2</sub> as fuel, and it maintained stable operation for over 400 h at 550 °C with a current density of 400 mA·cm<sup>−2</sup>. This research underscores an effective strategy for enhancing the performance and durability of proton ceramic fuel cells.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 4","pages":"2405 - 2415"},"PeriodicalIF":9.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Mg-doping induced fluorine-based superconductor MgF5 under high pressure 高压下镁掺杂诱导氟基超导体MgF5
IF 9.6 1区 材料科学
Rare Metals Pub Date : 2025-01-09 DOI: 10.1007/s12598-024-03110-z
Yan Gao, Tian Cui, Da Li
{"title":"Mg-doping induced fluorine-based superconductor MgF5 under high pressure","authors":"Yan Gao,&nbsp;Tian Cui,&nbsp;Da Li","doi":"10.1007/s12598-024-03110-z","DOIUrl":"10.1007/s12598-024-03110-z","url":null,"abstract":"<div><p>Exploring novel superconductors is a crucial topic in condensed matter physics. There are few reports on the superconductivity of fluorine due to the extremely high pressures required for its metallization. Here, metallization and superconductivity of fluorine were achieved in MgF<sub>5</sub> at 120 GPa by exploiting the high-pressure s-d transition of doped Mg. The unexpected Mg-F covalent bonding induced by Mg-d and F-p orbital interactions led to fluorine metallization and the formation of an F skeleton similar to a H-cage. The high density of states (DOS) from the F skeleton and phonon softening from strong Fermi surface nesting contribute to a high superconducting transition temperature (<i>T</i><sub>c</sub>). The <i>T</i><sub>c</sub> of <i>Pmmm</i>-MgF<sub>5</sub> at 120 GPa is 14.02 K, with strong electron–phonon coupling (<i>λ</i> = 0.84), which is close to that of Li<sub>6</sub>P at 270 GPa (<i>λ</i> = 1.01). This is the first observation of superconductivity in main-group metal fluorides. Additionally, two near-monatomic F atoms exist in the interstitial region of MgF<sub>5</sub>, significantly enhancing electron–phonon coupling. This work challenges the traditional view of main-group metal fluorides and provides deeper insights into the superconductivity and physicochemical properties of fluorine.</p><h3>Graphic abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 4","pages":"2620 - 2628"},"PeriodicalIF":9.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Co-doping-induced electronic reconfiguration of nanosized ZnS for facilitating oxygen reduction reaction in flexible aluminum–air batteries 在柔性铝-空气电池中,共掺杂诱导纳米ZnS的电子重配置促进氧还原反应
IF 9.6 1区 材料科学
Rare Metals Pub Date : 2025-01-09 DOI: 10.1007/s12598-024-03056-2
Yue Xu, Jun-Yuan Tang, Shuai-Dong Li, Hao-Lin Hu, Ying-Jian He, Shao-Feng Wang, Zhao-Meng Wu, Samuel Jeong, Ze-Yun Cai, Xi Lin, Kai-Long Hu
{"title":"Co-doping-induced electronic reconfiguration of nanosized ZnS for facilitating oxygen reduction reaction in flexible aluminum–air batteries","authors":"Yue Xu,&nbsp;Jun-Yuan Tang,&nbsp;Shuai-Dong Li,&nbsp;Hao-Lin Hu,&nbsp;Ying-Jian He,&nbsp;Shao-Feng Wang,&nbsp;Zhao-Meng Wu,&nbsp;Samuel Jeong,&nbsp;Ze-Yun Cai,&nbsp;Xi Lin,&nbsp;Kai-Long Hu","doi":"10.1007/s12598-024-03056-2","DOIUrl":"10.1007/s12598-024-03056-2","url":null,"abstract":"<div><p>The development of high-performance and cost-efficient catalysts holds great significance in facilitating oxygen reduction reaction (ORR), which is a pivotal process in next-generation energy storage devices, such as aluminum–air batteries. Transition metal sulfides have been proposed as promising non-noble metal ORR catalysts. However, achieving platinum (Pt)-comparable activity remains a challenge. Herein, a Co-doping-triggered electronic reconfiguration strategy is reported to tune the charge distribution and coordination state of ZnS nanoparticles anchored on N, S co-doped carbon (ZnS/NSC), thereby optimizing the intermediate adsorption kinetics and promoting ORR activity. The half-wave potential of 0.87 V as well as 100-h continuous durability are obtained by Co-doped ZnS/NSC in alkaline media. In addition, the solid-state aluminum–air battery is further assembled by using Co-doped ZnS/NSC as a cathode catalyst, achieving a maximum peak density of 100 mW·cm<sup>−2</sup> and discharge duration over 55 h. Density functional theory (DFT) calculations reveal that high electronegative Co-doping is beneficial for the construct of charge-transfer avenue and optimization of intermediate adsorption procedure. This study presents an efficient approach for preparing metal sulfides with high catalytic activity toward ORR in flexible metal–air batteries.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 4","pages":"2352 - 2365"},"PeriodicalIF":9.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Synergistic interaction of monodisperse Pt nanoparticles with defect-rich graphene aerogel for efficient acidic hydrogen evolution 单分散铂纳米粒子与富缺陷石墨烯气凝胶的协同作用对高效酸性析氢的影响
IF 9.6 1区 材料科学
Rare Metals Pub Date : 2025-01-09 DOI: 10.1007/s12598-024-03111-y
Hu Yao, Xin Yu, Yu-Xin Jia, Jiang-Cheng Zhang, Jia-Xin Yao, Ji-Quan Liu, Bao-Lian Su, Xiao-Hui Guo
{"title":"Synergistic interaction of monodisperse Pt nanoparticles with defect-rich graphene aerogel for efficient acidic hydrogen evolution","authors":"Hu Yao,&nbsp;Xin Yu,&nbsp;Yu-Xin Jia,&nbsp;Jiang-Cheng Zhang,&nbsp;Jia-Xin Yao,&nbsp;Ji-Quan Liu,&nbsp;Bao-Lian Su,&nbsp;Xiao-Hui Guo","doi":"10.1007/s12598-024-03111-y","DOIUrl":"10.1007/s12598-024-03111-y","url":null,"abstract":"<div><p>Solving the problem of aggregation and nonuniform dispersion of platinum (Pt) nanoparticles (NPs) is the key to obtaining high catalytic activity. Graphene aerogels (GAs) with large accessible specific surface area and abundant surface defects are considered to be excellent substrate materials for reducing Pt agglomeration and enhancing catalytic activity. Herein, Pt-based GA composites (Pt-GA-<i>x</i>) featuring homogeneous particle dispersion and high activity were successfully synthesized through a one-step reduction method. Fourier transform infrared (FTIR), Raman, and X-ray photoelectron spectroscopy (XPS) test results indicate that the presence of a large number of oxygen-containing functionalities in GA for anchoring Pt NPs, and the interaction with GA produces electronically structured Pt and defect-rich GA substrates. The obtained electrocatalyst Pt-GA-2 possesses a large specific surface area (443.46 m<sup>2</sup>·g<sup>−1</sup>), low Pt loading (3.08 wt%), and uniformly dispersed Pt NPs (average 42 nm). As an advanced hydrogen evolution reaction (HER) electrocatalyst, an overpotential of 34 mV is achieved at a current density of 10 mA·cm<sup>−2</sup> in 0.5 M H<sub>2</sub>SO<sub>4</sub> electrolyte, together with a low Tafel slope of 33.2 mV·dec<sup>−1</sup>. Hence, high mass activity (5623 mA·mg<sub>Pt</sub><sup>−1</sup>) and turnover frequency (TOF = 2.57 s<sup>−1</sup> at <i>η</i> = 100 mV) can be obtained, which are 6.81 and 6.76 times higher than those of commercial Pt/C catalysts. All these are attributed to enormous surface defects over GA and electron enrichment on Pt NPs. The present study highlights the unique advantages of GA in electrochemical energy conversion and provides new avenues to fabricate advanced HER electrocatalysts.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 4","pages":"2513 - 2521"},"PeriodicalIF":9.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Bimetallic Ti2NbC2 MXene as an efficient catalyst for reversible hydrogen storage in magnesium hydride 双金属Ti2NbC2 MXene作为氢化镁可逆储氢的高效催化剂
IF 9.6 1区 材料科学
Rare Metals Pub Date : 2025-01-09 DOI: 10.1007/s12598-024-03140-7
Mei-Ling Lv, Jia-Guang Zheng, Ao Xia, Qing-Bo Zhang, Zhen-Xuan Ma, Chao Su, Lei Ge
{"title":"Bimetallic Ti2NbC2 MXene as an efficient catalyst for reversible hydrogen storage in magnesium hydride","authors":"Mei-Ling Lv,&nbsp;Jia-Guang Zheng,&nbsp;Ao Xia,&nbsp;Qing-Bo Zhang,&nbsp;Zhen-Xuan Ma,&nbsp;Chao Su,&nbsp;Lei Ge","doi":"10.1007/s12598-024-03140-7","DOIUrl":"10.1007/s12598-024-03140-7","url":null,"abstract":"<div><p>Magnesium hydride (MgH<sub>2</sub>) was highly regarded for its substantial hydrogen storage capacity of up to 7.6 wt%, but its commercial application was hindered by the high operating temperatures and slow kinetics. In this study, the successful synthesis of the layered Ti<sub>2</sub>NbC<sub>2</sub> has significantly enhanced the hydrogen storage performance of MgH<sub>2</sub>. MgH<sub>2</sub> + 5 wt% Ti<sub>2</sub>NbC<sub>2</sub> began to release hydrogen at 190 °C and started to absorb hydrogen at room temperature. At a constant temperature of 275 °C, complete hydrogen release was achieved in just 250 s, up to 6.9 wt%. At 150 °C, the absorption of hydrogen reached 6.59 wt% within 200 s, and the hydrogen absorption activation energy was reduced to 41.517 ± 3.981 kJ·mol<sup>−1</sup>, significantly improving the kinetic performance. Moreover, the composite material still exhibited excellent cyclic stability after 20 cycles at 275 °C. In the process of hydrogen de/absorption of Ti<sub>2</sub>NbC<sub>2</sub> with MgH<sub>2</sub>, active substances Nb–H and Ti–H were generated in situ, which effectively weakened the Mg–H bond and acted as efficient “hydrogen pumps” to accelerate the re/dehydrogenation of MgH<sub>2</sub>. The unique layered structure and hydrogen affinity of Ti<sub>2</sub>NbC<sub>2</sub> provided an effective transfer channel for hydrogen migration, which was key to the excellent hydrogen storage performance of the MgH<sub>2</sub> + Ti<sub>2</sub>NbC<sub>2</sub>.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 4","pages":"2489 - 2501"},"PeriodicalIF":9.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Dendrite-free Mg-MOF-based all-solid-state lithium metal batteries with superior cycle life 无枝晶mg - mof基全固态锂金属电池,具有优越的循环寿命
IF 9.6 1区 材料科学
Rare Metals Pub Date : 2025-01-09 DOI: 10.1007/s12598-024-03049-1
Xu-Dong Chen, Si Zhao, Xin-Fu Feng, Jin Huang, Yan Wang, Zhen-Chun Qiu, Jian-Biao Wang, Yi-Yin Huang, Li-Tuo Zheng, Ming-Deng Wei, Zhen-Sheng Hong
{"title":"Dendrite-free Mg-MOF-based all-solid-state lithium metal batteries with superior cycle life","authors":"Xu-Dong Chen,&nbsp;Si Zhao,&nbsp;Xin-Fu Feng,&nbsp;Jin Huang,&nbsp;Yan Wang,&nbsp;Zhen-Chun Qiu,&nbsp;Jian-Biao Wang,&nbsp;Yi-Yin Huang,&nbsp;Li-Tuo Zheng,&nbsp;Ming-Deng Wei,&nbsp;Zhen-Sheng Hong","doi":"10.1007/s12598-024-03049-1","DOIUrl":"10.1007/s12598-024-03049-1","url":null,"abstract":"<div><div><h3>Graphic abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 4","pages":"2805 - 2814"},"PeriodicalIF":9.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
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