Small Methods
·
2026
·
IF 8.7
Sheng Ma,Xinze Li,Taoda Liu,Ke Yuan,Mengjun Tang,Waqas Muhammad,Xiaoling He,Tian Ouyang,Xiao Zhang,Wenyan Tao,Yinghua Niu,Zhen Zhang,Weiqiang Lv
The development of low-cost and high-performance noble-metal-free catalysts for the oxygen evolution reaction (OER) is central to advancing alkaline water electrolysis. This work introduces a novel “composition–thermal history” design strategy, synergistically combining controlled A-site Sr 2+ doping with optimized high-temperature sintering (950°C) in Pr-based perovskite. The resulting Pr 0.75 Sr 0.25 Ni 0.7 Co 0.3 O 3 (PSNC-25) exhibits unprecedented nanostructuring and a maximized concentration of oxygen vacancies, unlocking efficient OER via lattice oxygen-mediated mechanism. Sr-induced lattice distortion drastically reduces oxygen vacancy formation energy from 2.06 to 1.14 eV, promoting facile lattice oxygen participation. Thermal engineering stabilizes high-valence Co 4+ /Ni 3+ states and enhances M─O covalency. Electrochemically, PSNC-25 achieves exceptional activity in 1 M KOH: a low overpotential of 389 mV at 10 mA cm −2 and a Tafel slope of 83 mV dec −1 , significantly surpassing undoped PrNi 0.7 Co 0.3 O 3 (η 10 ＞ 570 mV). It also exhibits robust durability, by > 120 h chronopotentiometry at 10 mA cm −2 with only ∼45 mV potential drift. This work establishes a rational framework for activating LOM in cost-effective perovskites through dopant-induced electronic modulation and nano-structural control, advancing scalable green hydrogen production.
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PubMed
高影响因子
Journal of Materials Chemistry C
·
2026
·
IF 5.1
Tingting Zhao,Hao Wang,Mei Li,Shang Peng,Bohao Zhao,Qi Feng,Yanlong Chen,Yingxue Han,Jun Yuan,Ningxiao Feng,Jiao An,Sheng Jiang,Chuanlong Lin
Multimodal luminescent (MML) materials have attracted significant attention in anti-counterfeiting applications due to their high sensitivity, concealability, and compatibility. However, limited understanding of their mechanisms hinders rational material design and further advancement. Herein, we report that NaNbO3: Pr3+ phosphors, synthesized via solid-state reaction, exhibit distinctive pressure-responsive MML behaviors, encompassing photoluminescence (PL), persistent luminescence (PersL), and mechanoluminescence (ML). Under UV irradiation at increasing pressure, the PL intensity exhibits a volcano-shaped trend, peaking at approximately 4.5 GPa. After the irradiation is terminated, both the PersL intensity and decay time remain nearly unchanged. Conversely, the ML intensity decreases exponentially with pressure and becomes almost completely quenched around 4.0 GPa. In situ high-pressure structural and spectroscopic analyses indicate that the distinctive MML phenomena likely arise from the different pressure sensitivities of the coordination environments associated with deep traps and shallow traps, which offers insights into the underlying mechanism of MML materials. Furthermore, the integration of multiple luminescence modes enables rich and tunable emission responses, paving the way for advanced stress-sensing platforms and high-security anti-counterfeiting technologies.
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高影响因子
JOURNAL OF RARE EARTHS
·
2016
·Vol. 34
·期 4
·428-434
·
IF 2.188
Hao TANG,Hui DENG,Qingbo REN,Dingzhou CAI,Yiming REN,Lang SHAO,Yongde YAN,Milin ZHANG
The electrochemical behavior of Pr(III) and formation process of Pr-Al intermetallics were investigated by different electrochemical methods. The reduction of Pr(III) ion to metallic Pr is an one-step three-electrons reaction. The reversibility of Pr(III)/Pr(0) system was evaluated by cyclic voltammograms with different scan rates. The co-reduction of Pr(III) and Al(III) ions formed three different Pr-Al intermetallics at electrode potentials around −1.40, −1.80, and −1.95 V vs. Ag/AgCl at 723 K, respectively. Open-circuit chronopotentiometry and electromotive force (emf) measurements were carried out to estimate the relative molar Gibbs energies of Pr for the formation of different Pr-Al intermetallics in the temperature range of 723–843 K. The activities of Pr in the Pr-Al intermetallic compounds were calculated.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Jiahui Xu,Haoyun Zhao,Yujun Guo,Jiayi Qu,Xingtai Chen,Xiaoning Wang,Davoud Dastan,Xiaoming Tan,Xi-Tao Yin,Xiaoguang Ma
Utilizing a one-step hydrothermal synthesis, this study produced Pr-doped In 2 O 3 -based ethanol gas sensors. The material’s elemental composition and morphology were investigated by XPS, XRD, SEM, and other characterization methods. Effective substitution of In 3 + lattice sites by Pr 3+ /Pr 4+ ions was achieved, generating smooth irregular polyhedral particles composed of interlocked octahedra with varying sizes. At the optimum temperature of 300 °C, the sensor exhibited a response of 179–100 ppm ethanol, accompanied by rapid response/recovery times of 43 s and 13 s. Compared to pure In₂O₃, the response value increased by 10 times, and the recovery time was reduced by 66 s, while exhibiting excellent selectivity and long-term stability (>150 days). The enhanced ethanol response stems from increased adsorbed oxygen density, which creates a more polarized initial high-resistance state for subsequent gas-sensing reactions by forming a more pronounced surface electron depletion layer and higher initial barrier. Upon contact with target gases, the higher density of adsorbed oxygen participates as reaction sites and promotes surface redox reactions. This leads to a greater flux of released captured electrons, triggering a sharp decrease in the surface barrier and a dramatic macroscopic resistance transition in the material. Ultimately, this significantly amplifies the sensor's response magnitude. The work concludes by presenting a detailed mechanistic analysis of the sensing behavior.
研究领域:
材料科学
·
传感器与仪器
·
气体传感技术
·
纳米材料
·
化学工程
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高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 42
·15996-16003
·
IF 8.067
Wei Shi,Zefei Peng,Song Chen,Xueling Yan,Hua Xu,Lan Liu
Although metal oxide nanofibers (MO-NFs) based field-effect transistors (FETs) prepared by electrospinning have gained great attention, it is still challenging to develop MO-NFs directly on flexible substrates such as polyimide (PI) to achieve a high flexibility due to the high annealing temperature. In this work, using a UV pretreatment and a subsequent “combustion synthesis” process, high-quality Pr-doped In2O3 (InPrO) electrospun NFs were successfully fabricated on a flexible PI substrate at a relatively low temperature (380 °C). It was found that the InPrO-based flexible FET (f-FET) prepared by UV pretreatment and low annealing temperature not only has a good interfacial adhesion but also show a good flexibility. When the f-FET was wrapped around the rigid cylindrical rod with a radius of 5 mm, it exhibited good performance including a high μFE of 2.12 cm2 V−1 s−1, a large Ion/Ioff of ∼108, and an excellent cycling stability (1000 bending cycles). This low-temperature processing route will certainly contribute to the future flexible electronics manufacturing.
研究领域:
材料科学
·
电子工程
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 9
·5476-5486
·
IF 3.9
Shan Peng,Ranran Yang,Binglong Lei,Renhua Chen,Yun Gao,Xiaohong Xia,Kevin P. Homewood
It is of particular significance to unveil the authentic coloration mechanism of the multivalent praseodymium colored ZrSiO 4 yellow pigments for advanced decoration applications. We herein adopted a facile strategy to modulate the fluorine-assisted zircon crystallization and thereby obtained ultrafine Pr-ZrSiO 4 yellow pigments, which have a remarkably narrow size distribution and average diameters within 250–400 nm. By virtue of some cogent combinative spectra of reflection, absorption, excitation, and emission from three types of elaborately-designed H 2 -, air-, and O 2 -based pigments, the coloration mechanism for the Pr-colored zircon was systematically unveiled: both Pr 4+ and Pr 3+ coexist invariably in the pigments, while the former contributes primarily to the ligand-to-metal charge transfer from O 2p to Pr(IV) 4f for the blue–violet absorption to generate the yellow hue, and the latter is inclined to discolor the pigments. Therefore, an oxidizing atmosphere is preferable to produce brilliant Pr-ZrSiO 4 pigments with enhanced chromatic properties. The stark spectroscopic distinctions between the wide-band absorption from the nonluminescent tetravalency and the narrow-band absorption from the luminescent trivalency can expand our understanding to the rare-earth-based inorganic pigments.
研究领域:
材料科学
·
化学
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高影响因子
EUROPEAN POLYMER JOURNAL
·
2026
·
IF 6.8
Panpan Li,Yuhao Wang,Yifan Pian,Le Zhang,Jianyu Zhao,Zhijian Wang,Jiping Yang
Thermal protection materials for high-speed aerospace vehicles require a combination of excellent heat resistance, mechanical reliability, and lightweight characteristics. In this work, epoxidized hollow glass fibers (HGF) were incorporated into an epoxy silicone resin/phenolic resin (ESR/PR) hybrid resin matrix to overcome the intrinsic brittleness and high density of conventional phenolic-based composites. The successful grafting of epoxy functional groups onto the fiber surface enables strong interfacial bonding through co-crosslinking reactions with the ESR/PR matrix. Meanwhile, the hollow structure of HGF reduces density and provides intrinsic thermal insulation. The optimized ESR/PR-15HGF composite exhibits a tensile strength of 50.4 MPa (12.5 % improvement compared to ESR/PR matrix), elongation at break of 3.2 %, and a high specific strength of 3.97 × 10 4 m 2 /s 2 , achieving superior performance at lower filler content compared to solid glass fiber systems. Thermogravimetric analysis further reveals enhanced thermal stability, with a higher decomposition temperature (428 °C) and increased char yield (78.6 %). These improvements arise from the synergistic effects of enhanced interfacial interactions, fiber reinforcement, and hollow structure-induced thermal insulation, offering a promising strategy for advanced lightweight thermal protection materials.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Fengnian Zhang,Fuhao Cheng,Chufei Cheng,Meng Guo,Yufeng Liu,Yang Miao,Feng Gao,Xiaomin Wang
Abatract A series of compositionally complex fluorite oxides (CCFOs) were prepared by ball milling the mixture of ZrO 2 , HfO 2 , Y 2 O 3 , La 2 O 3 , and Pr 6 O 11 followed by conventional solid-state sintering. Both XRD and TG-DSC results demonstrated that single-phase (Zr 0.2 Hf 0.2 Pr 0.2 Y 0.2 La 0.2 )O 2-δ was formed at 1400 °C. Elements in bulk ceramic were uniformly distributed without evident accumulation according to SEM-EDS pictures. TEM results revealed that polycrystalline ceramic powder was assignable to cubic Fm-3m fluorite structure. The electrical conductivity ( σ ) was measured via EIS technology and activation energy ( E a ) of CCFOs was calculated in Arrhenius plots. In the temperature range of 300-750 °C, CCFOs preserved the same conduction mechanism and (Zr 0.1667 Hf 0.1667 Pr 0.1667 Y 0.25 La 0.25 )O 2-δ possessed higher σ and lower E a than other high entropy fluorite oxides which is related to the incorporation of Pr element or the connection of cation-V o complex.
研究领域:
材料科学
·
无机非金属材料
·
固体离子学
·
功能陶瓷
·
能源材料
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 8.3
Chengcheng Xu,Yao Luo,Tong Liu,Jietao Wang,Kai Ma,Jiayao Mao,Yi Wu,Haodong Ding,Rongsheng Chen,Yao Wang,Mingyue Ding
This work presents a systematic investigation of Pr-doped La 0.5−x Pr x Ba 0.5 CoO 3−δ (x = 0.05, 0.15, 0.25) cathodes, aiming to establish a structure–defect–electrochemistry correlation for developing high-performance solid oxide fuel cell (SOFC) electrodes. Moderate Pr incorporation (x = 0.15) stabilizes the cubic perovskite structure and optimizes the balance between oxygen-vacancy concentration, Co–O hybridization and lattice distortion. As a result, La 0.35 Pr 0.15 Ba 0.5 CoO 3−δ (La35Pr15) exhibits enhanced electrical conductivity of 320 S cm −1 at 800 °C and a low polarization resistance of 0.05 Ω cm 2 at 700 °C. The corresponding single cell delivers an excellent peak power density of 1.012 W cm −2 at 800 °C together with outstanding durability. Distribution of relaxation times analysis further reveals that Pr doping significantly accelerates both the intermediate-frequency oxygen surface-exchange process and the high-frequency charge-transfer kinetics, with La35Pr15 showing the strongest pO 2 responsiveness. This study demonstrates that rational Pr doping provides an effective strategy to simultaneously enhance structural stability and reaction kinetics, offering valuable insights for the design of next-generation SOFC cathodes.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2024
·
IF 4.7
Meidan Que,Yabo Wang,Ruochen Shi,Xun Sun,Jun Xu,Peihong Ma,Yanbo Sun,Jing Guan,Shengxia An
MIL-125(Ti) is well known for having stable structure, tunable electron structure, and multiple active sites, which is commonly studied in the field of photocatalysis . In this work, a series of rare earth (RE) doped MIL-125(Ti) (RE=Ce, Pr, Tm, Dy, Eu, and Sm) are prepared via the one-step hydrothermal method . Notably, Pr-MIL-125 displays a significantly enhanced catalytic performance than other RE-doped MIL-125, resulting in a maximal CO and CH 4 yield of 13.30 and 0.87 µmol·g −1 ·h −1 , respectively, which are 2.53-fold and 4.14-fold of the pristine MIL-125. The layered morphology endows Pr-MIL-125 with more active sites and facilitates the reaction of photoreduction CO 2 . Furthermore, the promoted photoactivities attributed to Pr ion dopant can act as electron transfer bridge and suppress charge recombination. This work would provide insight and guidance for designing RE-MOF based photocatalysts and enhancing the performance of photoreduction CO 2 .
研究领域:
材料化学
·
光催化
·
环境科学
·
无机化学
·
能源化学
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高影响因子
Bioresources and Bioprocessing
·
2024
·Vol. 11
·期 1
·1-12
·
IF 4.3
Fu Xin,Lin Kexin,Zhang Xiaodong,Guo Zhiyong,Kang Lixin,Li Aitao
Unspecific peroxygenases (UPOs) are glycosylated enzymes that provide an efficient method for oxyfunctionalizing a variety of substrates using only hydrogen peroxide (H2O2) as the oxygen donor. However, their poor heterologous expression has hindered their practical application. Here, a novel UPO from Marasmius fiardii PR910 (MfiUPO) was identified and heterologously expressed in Pichia pastoris. By employing a two-copy expression cassette, the protein titer reached 1.18 g L−1 in a 5 L bioreactor, marking the highest record. The glycoprotein rMfiUPO exhibited a smeared band in the 40 to 55 kDa range and demonstrated hydroxylation, epoxidation and alcohol oxidation. Moreover, the peroxidative activity was enhanced by 150% after exposure to 50% (v/v) acetone for 40 h. A semi-preparative production of 4-OH-β-ionone on a 100 mL scale resulted in a 54.2% isolated yield with 95% purity. With its high expression level, rMfiUPO is a promising candidate as an excellent parental template for enhancing desirable traits such as increased stability and selectivity through directed evolution, thereby meeting the necessary criteria for practical application.
研究领域:
生物化学
·
酶工程
·
合成生物学
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DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Jinghe Bai,Defeng Zhou,Leilei Niu,Xiaofei Zhu,Ning Wang,Qingwen Liang,Youjie Zhang,Ling Hu,Huifang Gong,Wenfu Yan
Here, in situ assembly in La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ and CoFe 2 O 4 composite (LSCFC) cathode was induced by Pr to form La 0.6 Sr 0.4 Co x Fe y O 3-δ /PrCoO 3 /Co 3 O 4 /PrO 2 (LSCFC-PI) multiphase heterostructures . The surface of LSCFC-PI forms uniform nanoparticles , and the unique core-shell structure prevents Sr segregation, thereby enhancing CO 2 tolerance and increasing oxygen reduction reaction (ORR) active sites. Furthermore, compared with LSCFC, LSCFC-PI increases the oxygen vacancy content of the cathode due to the existence of multiphase heterostructure, improves the ORR kinetics, and the conductivity is also greatly improved. The peak power density (PPD) of LSCFC-PI as a single-cell cathode at 700 ℃ reached 1.51 W cm −2 , which was 2.65 times higher than that of LSCFC's 0.57 W cm −2 , and in the long-term stability test at a constant voltage ∼0.8 V for 100 hours, showing excellent stability. In situ assembly of multiphase heterostructures is expected to become a new strategy for developing high-performance IT-SOFC cathodes.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
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