Rare Metals最新文献_第7页

Computational screening-aided design of transition metal-doped CeO2 as NH3-SCR catalysts 过渡金属掺杂CeO2作为NH3-SCR催化剂的计算筛选辅助设计

IF 11 1区材料科学

Rare Metals Pub Date : 2025-06-30 DOI: 10.1007/s12598-025-03402-y

Bo-Yu Wu, Zhuo-Shen Huang, Dan-Feng Zhao, Fa-Jie Hu, Bao-Xiang Peng, Ning Pu, Shen-Gen Zhang, Xiu-Bing Huang

{"title":"Computational screening-aided design of transition metal-doped CeO2 as NH3-SCR catalysts","authors":"Bo-Yu Wu, Zhuo-Shen Huang, Dan-Feng Zhao, Fa-Jie Hu, Bao-Xiang Peng, Ning Pu, Shen-Gen Zhang, Xiu-Bing Huang","doi":"10.1007/s12598-025-03402-y","DOIUrl":"10.1007/s12598-025-03402-y","url":null,"abstract":"<div><p>Transition metal-doped CeO<sub>2</sub> catalysts exhibit great potentials for the selective catalytic reduction (SCR) of nitrogen oxide (NO<sub><i>x</i></sub>) with NH<sub>3</sub> (NH<sub>3</sub>-SCR). However, traditional research mainly relies on a lot of experiments to find out effective catalysts, which wastes a lot of time and resources. Screening out effective CeO<sub>2</sub>-based catalysts for low-temperature NH<sub>3</sub>-SCR via density functional theory (DFT) calculations is crucial for the rational design and synthesis of efficient catalysts. Herein, transition metal (M = Co, Cr, Cu, Fe, Mn, Mo, Nb, Ni, Ta, Ti, V, and W)-doped CeO<sub>2</sub> catalysts were screened out via accelerated DFT calculations for NH<sub>3</sub>-SCR of nitric-oxide (NO) using three theoretical terms; (i) an adsorption energy of NH<sub>3</sub>, (ii) an adsorption energy of NO, and (iii) the reaction energies between NO with O<sub>2</sub> and lattice oxygen. The theoretically predicted trend in catalytic performance is as follows: CeO<sub>2</sub>-Mn, -Cu, -Mo > CeO<sub>2</sub>-Fe, -Co, -Ni, -V, -Cr > CeO<sub>2</sub>-W, -Ti > CeO<sub>2</sub>-Nb, -Ta. The theoretical prediction was well verified via experimental NH<sub>3</sub>-SCR activity of NO at low temperatures (90–300 °C), demonstrating CeO<sub>2</sub>-Mo as efficient NH<sub>3</sub>-SCR catalyst across a broad temperature range. Temperature-programmed desorption of NH<sub>3</sub> and in situ diffuse reflectance infrared Fourier transforms spectroscopy further indicated that metal doping significantly enhanced the NH<sub>3</sub> adsorption capacity and strength of CeO<sub>2</sub> in the medium- to low-temperature range. Consequently, accelerated DFT calculations provide a useful tool with great potentials for predicting the catalytic performance. </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 9","pages":"6303 - 6318"},"PeriodicalIF":11.0,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810801","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

V2CTx MXene-powered handheld SERS biosensor for the viral antigen test V2CTx mxene驱动手持式SERS生物传感器，用于病毒抗原检测

IF 11 1区材料科学

Rare Metals Pub Date : 2025-06-30 DOI: 10.1007/s12598-025-03408-6

Meng-Nan Li, Bo Cao, Yan-Ling Wang, Hang Zhou, Hai-Xu Yao, Yuan Gao, Xi-Wei Zhuang, Jian-Lei Liu, Chi-Jia Zeng, Susan Zhou, Da-Ling Zhu, Jian Ma, Fei-Yun Cui

{"title":"V2CTx MXene-powered handheld SERS biosensor for the viral antigen test","authors":"Meng-Nan Li, Bo Cao, Yan-Ling Wang, Hang Zhou, Hai-Xu Yao, Yuan Gao, Xi-Wei Zhuang, Jian-Lei Liu, Chi-Jia Zeng, Susan Zhou, Da-Ling Zhu, Jian Ma, Fei-Yun Cui","doi":"10.1007/s12598-025-03408-6","DOIUrl":"10.1007/s12598-025-03408-6","url":null,"abstract":"<p>The intrinsic property of MXenes to adsorb dyes with high Raman scattering cross-sections makes them promising candidates for surface-enhanced Raman scattering (SERS) biosensors. In the study, we report a vanadium carbide MXene (V<sub>2</sub>CT<sub><i>x</i></sub>)-based SERS biosensor tag, V<sub>2</sub>CT<sub><i>x</i></sub>@Thi (thionine)@Au NPs (gold nanoparticles)-Ab (antibody), owing to its large interlayer spacing and superior dye adsorption capacity. The tag V<sub>2</sub>CT<sub><i>x</i></sub>@Thi@Au NPs-Ab was fully characterized and validated, demonstrating a significantly enhanced Raman signal through both electromagnetic and chemical enhancement mechanisms. Using a handheld Raman spectrometer as a readout tool, the developed handheld SERS biosensor was successfully applied for the detection of viral antigens. The biosensor exhibited excellent linearity (1.562–100 nM) and achieved a low limit of detection (LOD) 1.562 nM. Moreover, the biosensor demonstrated good selectivity and stability for detecting the target S protein in saliva samples. Our study highlights the potential of V<sub>2</sub>CT<sub><i>x</i></sub> MXene as a powerful material for handheld SERS biosensors, paving the way for portable and efficient viral diagnostics.</p>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 9","pages":"6442 - 6455"},"PeriodicalIF":11.0,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810799","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

A high-voltage tolerance gel polymer electrolyte functioned by surface dielectric layer enabling durable supercapacitors 一种由表面介电层构成的高耐压凝胶聚合物电解质，可实现耐用的超级电容器

IF 11 1区材料科学

Rare Metals Pub Date : 2025-06-30 DOI: 10.1007/s12598-025-03370-3

Yuge Bai, Yuanyuan Feng, Kaiming Wang, Yuting Yin, Nan Li, Jianlin Chen, Bin Zhao, Fei Shen, Hao Chen, Fan Zhang, Xiaogang Han

{"title":"A high-voltage tolerance gel polymer electrolyte functioned by surface dielectric layer enabling durable supercapacitors","authors":"Yuge Bai, Yuanyuan Feng, Kaiming Wang, Yuting Yin, Nan Li, Jianlin Chen, Bin Zhao, Fei Shen, Hao Chen, Fan Zhang, Xiaogang Han","doi":"10.1007/s12598-025-03370-3","DOIUrl":"10.1007/s12598-025-03370-3","url":null,"abstract":"<div><p>Immense attention has been focused on developing supercapacitors in the field of energy storage by virtue of their exceptional power density, extended cycling stability and operational safety. However, traditional liquid electrolytes pose severe challenges in response to leakage, high volatility and low electrochemical stability issues. To address these problems, we have developed a novel composite polymer membrane for gel polymer electrolytes (GPEs). This membrane features an internal fibrous framework composed of shape-memory polymers, while surface dielectric layers of PVDF-HFP cross-linked with modified TiO<sub>2</sub> nanoparticles are constructed on both sides of the framework. This configuration modulates the Stern layer potential gradient and diffuse layer ionic distribution through dielectric polarization, thereby suppressing electrolyte decomposition at high voltages, mitigating side reactions and facilitating ionic conduction. The resultant quasi-solid-state supercapacitor demonstrates excellent electrochemical stability at a voltage of 3.5 V, achieving an energy density of 43.87 Wh kg<sup>−1</sup>, with a high-power density of 22.66 kW kg<sup>−1</sup> along with exceptional cyclic stability and mechanical flexibility. The synergistic structural design offers a safe and efficient energy harvesting solution for wearable electronic devices and portable energy storage systems.</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 9","pages":"6185 - 6198"},"PeriodicalIF":11.0,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810802","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

Promoting four-electron oxygen reduction reaction with chiral semimetals PtGa 手性半金属PtGa促进四电子氧还原反应

IF 11 1区材料科学

Rare Metals Pub Date : 2025-06-24 DOI: 10.1007/s12598-025-03336-5

Shu-Bin Sun, Dan-Dan Ma, Jin-Fu Ma, Lei Lei, De-Gao Wang, Jie Zhan, Yan Sun, Lei Wang, Guo-Hua Li, Jian-Hua Yan, Claudia Felser, Guo-Wei Li, Wei Li

{"title":"Promoting four-electron oxygen reduction reaction with chiral semimetals PtGa","authors":"Shu-Bin Sun, Dan-Dan Ma, Jin-Fu Ma, Lei Lei, De-Gao Wang, Jie Zhan, Yan Sun, Lei Wang, Guo-Hua Li, Jian-Hua Yan, Claudia Felser, Guo-Wei Li, Wei Li","doi":"10.1007/s12598-025-03336-5","DOIUrl":"10.1007/s12598-025-03336-5","url":null,"abstract":"<div><p>Spin polarization has emerged as a promising strategy for designing high-performance catalysts, particularly for reactions involving intermediates with triplet-singlet transitions, such as the oxygen reduction reaction (ORR). However, the creation of spin polarization typically requires complex phase structures or external fields, making it challenging to understand the mechanisms of spin manipulation and to search for high-performance catalysts. Chiral crystals, such as B20 compounds, inherently exhibit spin polarization when subjected to an electric current due to the coupling of crystal structure chirality and electronic chirality, offering an excellent platform for modulating the ORR process. In this study, nanosized PtGa alloys were successfully dispersed onto carbon and exhibited a distinct circular dichroism signal, indicating the presence of electron spin polarization. As an ORR catalyst, this chiral alloy demonstrated a high half-wave potential of 0.91 V, a mass activity of 1.17 A mg<sub>Pt</sub><sup>−1</sup>, and a specific activity of 4.08 mA cm<sup>−2</sup>, surpassing the performance of state-of-the-art Pt/C catalysts in both activity and cost. Notably, the alloy facilitates a direct four-electron transfer pathway, significantly reducing the formation of H<sub>2</sub>O<sub>2</sub> as a side product to an impressively low yield of 0.5%. This work provides an effective approach for generating spin-polarized electrons, thereby advancing the development of cutting-edge ORR catalysts.</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 8","pages":"5633 - 5642"},"PeriodicalIF":11.0,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168979","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

Effects of PHB and PLA coatings on the corrosion behavior of ultrathin Mg sheets in artificial blood plasma containing BSA PHB和PLA涂层对超薄Mg片在含BSA人工血浆中腐蚀行为的影响

IF 11 1区材料科学

Rare Metals Pub Date : 2025-06-24 DOI: 10.1007/s12598-025-03387-8

Bi-Wei Sun, Ju-Yi Yang, Jian-Wei Dai, Yan-Bin Zhao, Lu Zhang, Zi-Jian Huang, Jing Bai, Feng Xue, Paul K. Chu, Cheng-Lin Chu

{"title":"Effects of PHB and PLA coatings on the corrosion behavior of ultrathin Mg sheets in artificial blood plasma containing BSA","authors":"Bi-Wei Sun, Ju-Yi Yang, Jian-Wei Dai, Yan-Bin Zhao, Lu Zhang, Zi-Jian Huang, Jing Bai, Feng Xue, Paul K. Chu, Cheng-Lin Chu","doi":"10.1007/s12598-025-03387-8","DOIUrl":"10.1007/s12598-025-03387-8","url":null,"abstract":"<div><p>Biodegradable polymer coatings are commonly used as protective barriers on magnesium (Mg) and its alloys. The properties of polymers, such as crystallinity and degradation properties, have a crucial impact on their corrosion resistance. In this work, polyhydroxybutyrate (PHB) coatings are deposited on Mg sheets with a thickness similar to that of cardiovascular stents to assess the degradation behavior, and poly-lactic acid (PLA)-coated Mg is also investigated to compare the structure–property-performance relationship. The hydrogen evolution volume (HEV) of the PHB-coated sample decreases by 30% after immersion in artificial blood plasma (AP) for 7 days, whereas the PLA-coated sample shows an increase of 154%. The PHB coating also shows excellent durability at a constant voltage, compared to severe rupture of the PLA coating. The degradation behavior of the coated-Mg samples is evaluated in AP solution containing different concentrations of the bovine serum albumin (BSA). Corrosion is inhibited as the protein concentration increases. The degradation rates of the Mg, PLA-coated Mg, and PHB-coated Mg decrease by 65%, 88%, and 75% for 5 g L<sup>−1</sup> BSA, respectively. Our results reveal that higher crystallinity and less acidic degradation products give rise to better durability, while the acid self-catalytic effect leads to the failure of PLA. The protein-polymer interactions are determined and the empirical relationship of HEV is established.</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 8","pages":"5656 - 5671"},"PeriodicalIF":11.0,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168978","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

Highly efficient non-enzyme glucose sensing by multi-component CuCoNiFeSi alloy with feather-like CuxO 羽状CuxO多组分CuCoNiFeSi合金的高效非酶葡萄糖传感

IF 11 1区材料科学

Rare Metals Pub Date : 2025-06-23 DOI: 10.1007/s12598-025-03401-z

Jianwu Wen, Shuang-Qin Chen, Xindong Zhu, Xiaochan Wu, Hailong Peng, Bingbing Li, He Zhu, Tao Feng, Si Lan

{"title":"Highly efficient non-enzyme glucose sensing by multi-component CuCoNiFeSi alloy with feather-like CuxO","authors":"Jianwu Wen, Shuang-Qin Chen, Xindong Zhu, Xiaochan Wu, Hailong Peng, Bingbing Li, He Zhu, Tao Feng, Si Lan","doi":"10.1007/s12598-025-03401-z","DOIUrl":"10.1007/s12598-025-03401-z","url":null,"abstract":"<div><p>Extensive research focuses on developing cost-effective, high-performance electrochemical non-enzyme glucose sensors, particularly using nanocomposites of metal oxides and multi-component alloys. In this paper, a batch of nano-flaky Cu<sub><i>x</i></sub>O decorated CuCoNiFeSi (Cu<sub><i>x</i></sub>O@Cu/Fe) and CuCoNiSi (Cu<sub><i>x</i></sub>O@Cu) electrode was developed by melt-spinning following by anodization. According to the results, the sensitivity of Cu<sub><i>x</i></sub>O@Cu/Fe-25/35 for glucose detection in the lower (0–1 mM) and higher region (1–15 and 15–21 mM) is 2.544, 1.51 and 0.64 mA mM<sup>−1</sup> cm<sup>−2</sup>, respectively. The limit of detection (LOD) was estimated to be 0.88 μM (signal noise ratio (<i>S</i>/<i>N</i>) = 3). Furthermore, the Cu<sub><i>x</i></sub>O@Cu/Fe-25/35 possessed various merits, such as excellent selectivity, good reusability, acceptable reproducibility, satisfying long-term stability, and high tolerance to chloride ions. The enhanced performances of the Cu<sub><i>x</i></sub>O@Cu/Fe-25/35 electrodes are attributable to the feather-like Cu<sub><i>x</i></sub>O and synergistic effect between Cu<sub><i>x</i></sub>O and Ni(Fe, Co)<sub>3</sub>Si<sub>2</sub>. The work provides a new pathway for detecting all glucose density by electrochemical non-enzymatic glucose sensor.</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 9","pages":"6471 - 6482"},"PeriodicalIF":11.0,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810842","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

Constructing adsorption site-enhanced ZnWO4/Li6W2O9 heterojunction sensing electrode for efficient performance in impedancemetric NO2 sensor 构建吸附位增强ZnWO4/Li6W2O9异质结传感电极，提高阻抗型二氧化氮传感器的性能

IF 11 1区材料科学

Rare Metals Pub Date : 2025-06-19 DOI: 10.1007/s12598-025-03296-w

Teng-Teng Zhao, Wei-Wei Meng, Yue-Hua Li, Ming-Yong Wang, Ling Wang, Zhang-Xing He, Lei Dai

{"title":"Constructing adsorption site-enhanced ZnWO4/Li6W2O9 heterojunction sensing electrode for efficient performance in impedancemetric NO2 sensor","authors":"Teng-Teng Zhao, Wei-Wei Meng, Yue-Hua Li, Ming-Yong Wang, Ling Wang, Zhang-Xing He, Lei Dai","doi":"10.1007/s12598-025-03296-w","DOIUrl":"10.1007/s12598-025-03296-w","url":null,"abstract":"<div><p>The application of NO<sub>2</sub> sensor reduces the emission of NO<sub>2</sub> from the industry and automotive vehicles. However, insufficient electrocatalytic activity and adsorption to NO<sub>2</sub> of sensing electrode (SE) limit the sensitivity increment of NO<sub>2</sub> sensor. Thus, a novel ZnWO<sub>4</sub>/Li<sub>6</sub>W<sub>2</sub>O<sub>9</sub> heterojunction SE is constructed by molten salt method for the zirconia-based impedancemetric NO<sub>2</sub> sensor. The influence of the ZnWO<sub>4</sub>/Li<sub>6</sub>W<sub>2</sub>O<sub>9</sub> ratio on the performance of the sensor is investigated. The results show that Li<sub>6</sub>W<sub>2</sub>O<sub>9</sub> in-situ formation on the surface of the ZnWO<sub>4</sub> in LiNO<sub>3</sub> molten at a low temperature of 300 °C. The incorporation of Li<sub>6</sub>W<sub>2</sub>O<sub>9</sub> enhances both the adsorption property and electrocatalytic activity of the SE, simultaneously, resulting in a significant increase in the sensitivity of sensor. The sensitivity increases gradually with the increasing incorporation of Li<sub>6</sub>W<sub>2</sub>O<sub>9</sub>. The sensitivity of ZnWO<sub>4</sub>/37.5% Li<sub>6</sub>W<sub>2</sub>O<sub>9</sub> sensor is significantly increased by 124% compared to the pristine ZnWO<sub>4</sub> sensor and exhibits the largest sensitivity of 25.19 (°) decade<sup>−1</sup> at 400 °C. Moreover, the ZnWO<sub>4</sub>/Li<sub>6</sub>W<sub>2</sub>O<sub>9</sub> sensor also displays excellent selectivity, long-term stability, and repeatability. The introduction of in-situ formation by molten salt method is an effective strategy to develop gas sensors with large sensitivity.</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 8","pages":"5594 - 5606"},"PeriodicalIF":11.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166622","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

Defectizing high-entropy oxide with the introduction of Se to facilitate the kinetics for highly cycle-stable lithium–sulfur batteries 引入硒对高熵氧化物进行脱渣，促进高循环稳定锂硫电池的动力学

IF 11 1区材料科学

Rare Metals Pub Date : 2025-06-18 DOI: 10.1007/s12598-025-03390-z

Wen-Xu Li, Wei-Ran Wang, Dan Li, Qi-Fu Jin, Jin-Bao Gao, Jian-Xun Zhao, Qing-Cheng Liang, Qing-Bao Zhang, Peng Chen

{"title":"Defectizing high-entropy oxide with the introduction of Se to facilitate the kinetics for highly cycle-stable lithium–sulfur batteries","authors":"Wen-Xu Li, Wei-Ran Wang, Dan Li, Qi-Fu Jin, Jin-Bao Gao, Jian-Xun Zhao, Qing-Cheng Liang, Qing-Bao Zhang, Peng Chen","doi":"10.1007/s12598-025-03390-z","DOIUrl":"10.1007/s12598-025-03390-z","url":null,"abstract":"<div><p>As a novel material, high-entropy compounds have attracted extensive attention in the field of lithium–sulfur battery host materials due to their diverse elemental composition with a wide range of properties. The ability to effectively mitigate the shuttle effect of lithium polysulfides and catalyze the bidirectional conversion of Li<sub>2</sub>S<sub>2</sub>/Li<sub>2</sub>S is crucial to enhance the overall performance of the battery. In this study, a unique sulfur host nanosized high-entropy material comprising selenium-doped HEO (AlCrFeCoNi)<sub>3</sub>O<sub>4-x</sub>-Se<sub>x</sub> is fabricated using an in situ thermal reduction and selenylation method. In the high-entropy compounds, the introduction of Se causes that the generation of oxygen vacancies during the lattice distortion serves as ion transfer pathway and the formation of M-Se bonds provides a high adsorption capability for LiPSs. Moreover, the polymetallic cooperative high-entropy nanoparticles also provide numerous active sites favoring redox kinetics of the sulfur electrode. The resulting selenium-doped HEO (AlCrFeCoNi)<sub>3</sub>O<sub>4-<i>x</i></sub>-Se<sub><i>x</i></sub> not only enhances discharge capacity but also maintains excellent capacity cycling stability. As a result, the HEO-Se/S composite exhibits a specific capacity of 1233.9 mAh g<sup>−1</sup> at 0.1C and experiences minimal capacity fading at a rate of 0.038% per cycle over 500 cycles at 0.2C, while host materials with sulfur loading of 4.33 mg cm<sup>−2</sup> and E/S ratio of 5.88 μL mg<sup>−1</sup> exhibit excellent capacity retention after 100 cycles at 0.2C. This work offers new insights into synthesizing high-entropy nanomaterials for improving the electrochemical performance of Li–S batteries.</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 9","pages":"6053 - 6068"},"PeriodicalIF":11.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810829","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

Manipulating the metal–oxygen covalency through diminishing d-p band center difference for rechargeable zinc-air batteries 通过减小可充电锌-空气电池的d-p带中心差来控制金属-氧共价

IF 11 1区材料科学

Rare Metals Pub Date : 2025-06-18 DOI: 10.1007/s12598-025-03373-0

De-Xuan Huang, Jian-Wei Zhao, Xue-Lei Hu, Tong Liu

{"title":"Manipulating the metal–oxygen covalency through diminishing d-p band center difference for rechargeable zinc-air batteries","authors":"De-Xuan Huang, Jian-Wei Zhao, Xue-Lei Hu, Tong Liu","doi":"10.1007/s12598-025-03373-0","DOIUrl":"10.1007/s12598-025-03373-0","url":null,"abstract":"<div><p>Transition metal oxides have garnered significant attention as electrocatalysts for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). However, their sluggish reaction kinetics and poor stability hinder commercial applications. Herein, we report the synthesis of a bimetallic cobalt manganese oxide, Co<sub>0.99</sub>Mn<sub>2.01</sub>O<sub>4</sub> (CMO), synthesized via a hydrothermal technique, which serves as a highly efficient bifunctional ORR/OER electrocatalyst owing to its impressive half-wave potential of 0.767 V and low overpotential of 1.677 V at 10 mA cm<sup>−2</sup>. Theoretical calculations revealed that the d-band centers of Co 3d and Mn 3d in CMO, located at tetrahedral and octahedral sites, are positioned near the Fermi level, facilitating the adsorption of electrocatalytic intermediates. Furthermore, the distance between the Co 3d and O 2p band centers in CMO is smaller than that in Co<sub>3</sub>O<sub>4</sub>, and the distance between the Mn 3d and O 2p band centers in CMO is shorter than that in Mn<sub>2</sub>O<sub>3</sub>, indicating that the Co–O and Mn–O bonds in CMO exhibit greater covalency, significantly enhancing ORR/OER activity. Notably, CMO serves as an advanced air electrode material for rechargeable zinc-air batteries (ZABs), demonstrating improved charge–discharge performance with a low voltage gap of 0.87 V at 5 mA cm<sup>−2</sup>, high peak power density of 124 mW cm<sup>−2</sup>, and excellent cycle stability of over 540 h at 5 mA cm<sup>−2</sup>. This superior ORR/OER activity, combined with the simple material combination, makes CMO a promising catalyst for rechargeable ZABs.</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 9","pages":"6140 - 6151"},"PeriodicalIF":11.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810828","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

d-orbital charge density regulation of SiOx/RuCoOx nanoparticles to boost water splitting in acidic media SiOx/RuCoOx纳米颗粒在酸性介质中促进水分解的d轨道电荷密度调节

IF 11 1区材料科学

Rare Metals Pub Date : 2025-06-18 DOI: 10.1007/s12598-025-03262-6

Ting Zhu, Yu-Hao Wang, Teng Sun, Ye-Can Pi, Xiao-Dong Pi, Jun Xu, Kun-Ji Chen

{"title":"d-orbital charge density regulation of SiOx/RuCoOx nanoparticles to boost water splitting in acidic media","authors":"Ting Zhu, Yu-Hao Wang, Teng Sun, Ye-Can Pi, Xiao-Dong Pi, Jun Xu, Kun-Ji Chen","doi":"10.1007/s12598-025-03262-6","DOIUrl":"10.1007/s12598-025-03262-6","url":null,"abstract":"<div><p>Hydrogen has emerged as a promising clean energy carrier, and the development of cost-effective electrocatalysts that retain high activity under acidic media is crucial for advancing proton exchange membrane water electrolysis (PEMWE). Here, we propose the SiO<sub><i>x</i></sub>/RuCoO<sub><i>x</i></sub> nanoparticles (SiO<sub><i>x</i></sub>/RuCoO<sub><i>x</i></sub> NPs) as bifunctional electrocatalysts for efficient hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) under acidic media. The Ru-O-Si interface, along with charge transfer between Ru and Co, modulates the d-band electronic structure of the Ru site, achieving superior performance with a low HER overpotential of 18 mV at 10 mA·cm<sup>−2</sup> and a turnover frequency of 8.86 H<sub>2</sub>·s<sup>−1</sup> at 100 mV. For OER, the overpotential is 217 mV at 10 mA·cm<sup>−2</sup>. SiO<sub><i>x</i></sub>/RuCoO<sub><i>x</i></sub> NPs exhibit a cell voltage of 1.482 V at 10 mA·cm<sup>−2</sup> with an energy conversion efficiency of 83.0%. This work takes a significant step toward achieving efficient and cost-effective bifunctional electrocatalysts for water splitting, playing a critical role in the transition to clean energy technologies.</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 9","pages":"6223 - 6231"},"PeriodicalIF":11.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810827","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