Science China-Chemistry
·
2024
·
IF 10.4
Kimaka P. Rinel R.,Wang Ping,He Miao,Meng Senyao,Yao Jiasai,Li Huawei,Yang Cheng,Li Zhenxing
Polymetallic layered double hydroxides are promising cost-effective catalysts for the oxygen evolution reaction (OER) due to their versatile anionic and cationic tunability. Nevertheless, several challenges persist, notably, issues related to low electrical conductivity, poor catalytic activity, and stability, especially at high current density. Herein, we report the design of Ce- and La-doped CoNiFe-layered double hydroxide (CeLaCoNiFe-LDH) nanosheets through a facile and scalable in situ self-assembly strategy that displays enhanced OER activity. Experimental and theoretical investigations provide insights into the impact of Ce-and La-doping by comparing CeCoNiFe-LDH, LaCoNiFe-LDH, and pristine CoNiFe-LDH, all synthesized using the same methodology. These results reveal that doping Ce 3+ and La 3+ into CoNiFe-LDH substantially improves its electronic structure, resulting in enhanced conductivity, more oxygen vacancies (Vo), electron interaction, and active site formation. Consequently, significantly reduced overpotentials of 175, 314, and 424 mV at 10, 100, and 500 mA cm −2 , respectively, and a highly stable current density of 120 h in 1 M KOH were achieved. Notably, these performance metrics surpass those of unmodified LDHs and are competitive with many lanthanide-doped transition metal-based LDH electrocatalysts, as well as noble metal catalysts like ruthenium catalysts. This work represents a pioneering effort in doping Ce 3+ and La 3+ ions into a functional CoNiFe-based electrocatalyst, offering inspiring OER performance and scalability potential.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2020
·
IF 3.104
Wei Li,Shuang Wang,Jinping Li
A series of BaCeO 3 modified with different rare earth elements (La, Y, Pr) were synthesized by co-precipitation and calcination and the effect of rare earth elements for catalytic ammonia synthesis under mild conditions was studied. The ammonia synthesis performance tests show that 2.5% Ru/BaCe 0.9 La 0.1 O 3– δ catalyst (All the percentages of Ru in this article are in mass fraction) exhibits the highest ammonia synthesis rate (34 mmol/(g·h)) at 3 MPa, 450 °C, and no sign of deactivation after 100 h of reaction. H 2 -TPR and XPS analyses indicate that the introduction of La increases the amount of oxygen vacancies of the catalyst, which is beneficial to increasing the electron density of Ru surface. HRTEM analysis shows that the Ru particle size is reduced greatly after La is introduced, which facilitates the catalyst generating more B 5 -type sites (active sites of Ru species for N N dissociation). CO 2 -TPD analysis indicates that BaCe 0.9 La 0.1 O 3– δ has stronger basicity , which promotes electrons transfer from support to Ru. This work provides an effective method for design and synthesis of Ru-based multi-element composite perovskite oxide catalysts.
研究领域:
催化化学
·
材料科学
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2026
·
IF 8.2
Yicong Chen,Xu Yang,Shengfan Liao,Dong Xia,Xin He,Qingbiao Li,Yuanpeng Wang
The surface functional layer of biochar promotes lanthanum dispersion. • Lanthanum-loaded biochar adsorbed 63.5 mg P·g −1 of phosphate within 1 min. • Phosphate in the fixed-bed effluent kept below 0.2 mg P·L −1 . • Lanthanum raised phosphate selectivity over nitrate and sulfate by 14 and 32 times. • Molecular dynamics simulations show lanthanum boosting phosphate dehydration and diffusion. Metal-doped biochar is a promising phosphate adsorbent for mitigating phosphate-driven eutrophication and valorizing biomass, but its adsorption performance, selectivity and stability are strongly governed by the biochar-metal structure. Herein, the biochar was embedded into carbon nanofiber’ networks to construct a self-supporting biochar-carbon nanofiber framework (C-ACF). The C-ACF was first functionalized with an amine-rich HCCP-PEI polymer layer to obtain PCP@C-ACF, which was then used to anchor highly dispersed La species, yielding the performant La-loaded adsorbent PCP-La@C-ACF. Expectantly, PCP-La@C-ACF exhibited outstanding phosphate adsorption kinetics and selectivity, achieving phosphate uptake of 63.5 mg P·g −1 within 1 min (9.3-fold that of La(OH) 3 ) and an equilibrium capacity of 93.9 mg P·g −1 , along with broad pH tolerance and marked reusability. Under fixed-bed operation, PCP-La@C-ACF maintained the effluent phosphate concentration below 0.2 mg P·L −1 (removal rate > 99.4%). Owing to the loaded La species, markedly improved phosphate selectivity under high concentrations of Cl − , NO 3 – , and SO 4 2− was achieved, with selectivity coefficients against NO 3 – and SO 4 2− being 14- and 32-fold higher than La-free PCP@C-ACF. Molecular dynamics simulations rationalize that such dispersed La species enhance adsorption selectivity/rate by promoting phosphate dehydration and improving interfacial diffusion efficiency. Download: Download high-res image (179KB) Download: Download full-size image
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DOI
PubMed
高影响因子
Nanomaterials
·
2026
·Vol. 16
·期 16
·1015
·
IF 4.8
Xin Lin,Jiayi Tu,Jinyun Zhao,Fangfang Wu,Xingping Fu,Hao Lin,Jiapeng Hu
In this study, a hierarchical rod-assembled, polypyrrole-modified Ce–Al–La trimetallic metal–organic framework (Ce–Al–La–MOFs@PPy) composite was successfully synthesized through a solvothermal method combined with in situ polymerization for efficient fluoride removal from aqueous solutions. The incorporation of conductive polypyrrole (PPy) into the multimetallic MOFs effectively enhanced the structural stability, surface properties, and adsorption performance of the material. Adsorption experiments demonstrated that the optimal metal-to-ligand molar ratio was 3:1, and the prepared adsorbent exhibited excellent fluoride removal performance under weakly acidic conditions (pH = 5). The maximum adsorption capacity calculated from the Langmuir model reached 216.92 mg·g−1at 45 °C. Adsorption kinetics were well fitted by the pseudo-second-order model, indicating that the adsorption process was mainly governed by chemisorption. Mechanism investigations based on FTIR and XPS analyses demonstrated that fluoride removal mainly occurred through electrostatic attraction and coordination exchange between fluoride ions and the Ce/La active sites. In addition, the composite exhibited good selectivity, anti-interference ability toward coexisting ions, and satisfactory fluoride removal performance in practical industrial wastewater. These findings suggest that Ce–Al–La–MOFs@PPy is a promising adsorbent for efficient fluoride-contaminated wastewater treatment.
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DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2026
·
IF 17.2
Han Xiang,Lu Lin,Yu Li,Qisong Yi,Chaoran Jiang,Rui Chen,Yuanshuai Liu,Na Sai,Jinlu He,Fenghua Bai,Wenhao Luo
Selective hydrogenation of furfural (FFL) to furfuryl alcohol (FAL) represents a pivotal paradigm in sustainable biomass valorization. In this work, nanoscale Cu clusters were encapsulated in silicalite-1 (S-1) zeolite using in-situ synthesis, and further modified by a rare-earth element of La for regulating the catalyst microenvironment. The obtained La-Cu@S-1 can provide an enhanced performance in the FFL-to-FAL transformations, with 98.6% conversion of FFL and 99% selectivity of FAL at 110 °C, 20 bar H 2 , and 3 h. Besides, La-Cu@S-1 shows a good stability without apparent catalyst deactivation upon four consecutive runs. Extensive characterization research reveals that La addition could provide anchoring sites for Cu nanoclusters via an enhanced electronic interaction, thereby effectively suppressing metal leaching and agglomeration during the liquid-phase catalysis. Additionally, La addition could modulate the zeolite microenvironment of encapsulated Cu nanoparticles and notably stabilize the conventionally unstable Cu + species at a high proportion, even in a reductive H 2 atmosphere during catalysis, accounting for the enhanced activity and stability. This study showcases La modification as an efficient approach to rationally develop metal-zeolite combinations with enhanced performance, promoting potential utilization and development of rare-earth elements in the valorization of biomass and other renewable energy.
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DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Yibo Zhang,Shen Wang,Biao Liu,Yan Hao
MgAl 2 O 4 :Cr 3+ transparent ceramics were prepared by a hot-pressed sintering process with Y 2 O 3 and La 2 O 3 as sintering aids, and the effects on the microstructure, densification, optical transmission, and photoluminescent properties were investigated. The sintering aids of Y 2 O 3 and La 2 O 3 enhanced the relative density, reaching 99.33% with 2.4 wt% Y 2 O 3 and 99.24% with 0.8 wt% La 2 O 3 . La 2 O 3 also inhibited abnormal grain growth and obtained ceramics with uniform grain size. In addition, the optical transmission was also improved with Y 2 O 3 and La 2 O 3 as sintering aids. The transmission of the ceramic with 2.4 wt% Y 2 O 3 exceeded 78% in the region of 700–6000 nm and reached 83% at 1450 nm. Moreover, Y 2 O 3 and La 2 O 3 both contributed to improving the quantum yield of the ceramics, especially for Y 2 O 3 , and the quantum yield was about 0.354, which was approximately two times higher than that without R 2 O 3 . In summary, La 2 O 3 was helpful for improving sintering process, inhibiting grain growth, and homogenizing the grain size, while Y 2 O 3 was significant for enhancing the optical and photoluminescent properties.
研究领域:
材料科学
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无机非金属材料
·
功能陶瓷
·
光电子学
·
固态发光材料
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 4
·6246-6253
·
IF 5.532
Jingxin Li,WenYan Zhang,XueFang Wang,RunQiu Peng,BingKai Gao,Qian Wu,Zicai Zhang,Zhijun Wang
In recent years, the broadband near-infrared (NIR) spectroscopy technology has been widely used in the field of nondestructive testing . However, these existing NIR phosphors showed relatively short emission wavelengths , narrower half-maximum full-width (FWHM), and narrower half-peak widths, importantly, few phosphors presented the emission from 950 nm to 1100 nm. In order to solve these problems, the Yb 3+ /Cr 3+ ions codoped La(Mg 0.5 Sn 0.5 In 0.5 Sc 0.5 ) 0.5 O 3 (LMSIS) was synthesized by the solid-state method, and the emission spectrum of LMSIS:Cr 3+ can be extended to the NIR long-wave region due to the energy transfer of Yb 3+ and Cr 3+ , and the thermal stability of the phosphor can be improved due to the inherent temperature stability of the Yb 3+ f-f transition. The NIR phosphor converted light emitting diodes (pc-LEDs) were fabricated by combining the LMSIS:0.003Cr 3+ , 0.0015Yb 3+ with blue LED chip, which can be expected to be used in the field of broadband near-infrared non-destructive detection.
研究领域:
材料科学
·
光学材料
·
光子学
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固态化学
·
发光材料
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DOI
高影响因子
Journal of Advanced Ceramics
·
2021
·Vol. 10
·期 4
·860-870
·
IF 6.707
Xu Wenjing,Zhang Zhongwei,Liu Chengyan,Gao Jie,Ye Zhenyuan,Chen Chunguang,Peng Ying,Bai Xiaobo,Miao Lei
Eco-friendly SnTe based thermoelectric materials are intensively studied recently as candidates to replace PbTe; yet the thermoelectric performance of SnTe is suppressed by its intrinsically high carrier concentration and high thermal conductivity. In this work, we confirm that the Ag and La co-doping can be applied to simultaneously enhance the power factor and reduce the thermal conductivity, contributing to a final promotion of figure of merit. On one hand, the carrier concentration and band offset between valence bands are concurrently reduced, promoting the power factor to a highest value of ∼2436 µW·m −1 ·K −2 at 873 K. On the other hand, lots of dislocations (∼3.16×10 7 mm −2 ) associated with impurity precipitates are generated, resulting in the decline of thermal conductivity to a minimum value of 1.87 W·m −1 ·K −1 at 873 K. As a result, a substantial thermoelectric performance enhancement up to zT ≈ 1.0 at 873 K is obtained for the sample Sn 0.94 Ag 0.09 La 0.05 Te, which is twice that of the pristine SnTe ( zT ≈ 0.49 at 873 K). This strategy of synergistic manipulation of electronic band and microstructures via introducing rare earth elements could be applied to other systems to improve thermoelectric performance.
研究领域:
材料科学
·
热电学
·
半导体物理
·
能量转换材料
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Jiaming Cheng,Yan Xu,Zhaopeng Liu,Zhenhua Li,Baowei Wang,Yujun Zhao,Xinbin Ma
A series of Mo-based catalysts supported on Ce1–xLaxO2−δ solid solution were prepared and performed in sulfur-resistant methanation. Characterization results suggested the formation of Ce1–xLaxO2−δ solid solution with a cubic fluorite structure. The correlation between the surface concentration of Ce3+ and oxygen mobility was well revealed. The higher oxygen storage capacity induced by La dopant enhanced the reducibility of the MoO3/Ce1–xLaxO2−δ during the sulfidation. Meanwhile, the presence of oxygen vacancy induced by Ce3+ prompted the sulfidation of Mo species, resulting in a higher dispersion of MoS2. The coupling between the CO hydrogenation and water–gas-shift (WGS) reaction is important for the sulfur-resistant methanation. The apparent methanation rate is easily determined by CO hydrogenation, and WGS reaction could provide more H2 for the CO hydrogenation. MoO3/Ce0.8La0.2O2−δ catalyst exhibited the highest activity in a broad temperature regime of 450–550 °C due to its high MoS2 dispersion and surface concentration of Ce3+.
研究领域:
催化化学
·
能源化学工程
·
材料化学
·
表面科学
·
工业催化
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DOI
高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Shuyu Chen,Weixi Chen,Yuenan Zheng,Jie Fan,Wen-Cui Li,Zhankai Liu,Yifan Zhang,Liang Gao,Jiake Wei,Dongqi Wang,An-Hui Lu
Boron-based materials are promising catalysts for the oxidative dehydrogenation of propane (ODHP) but face a challenge in retaining the stability of BOx species against hydrolytic leaching. Herein, we developed a boron-based catalyst possessing graded BOx/LaBxOy/LaB3O6 multi-interfaces derived from LaB6 via a controlled surface oxidation. Multiple characterizations revealed that the active BOx-La species were hosted within the BOx/LaBxOy/LaB3O6 multi-interfaces, where significant charge transfer between B and La evidenced a strong bonding interaction between outer-layer BOx species and La species. The catalyst exhibited an olefin selectivity of 94.9% with 25.9% propane conversion at 530 °C and demonstrated long-term durability during a 1000 h test under intrinsic propane conversion, with a low deactivation rate constant (kd = 0.0004 h−1) and a slow boron leaching rate of only 0.001 wt% h−1. DFT simulations revealed that in situ-formed BOx-La species exhibited enhanced hydrolysis resistance in the presence of La, which alleviated the electron deficiency of nearby B and impeded the nucleophilic attack of H2O at the B sites. This interfacial electronic interaction preserved the active BOx species and ensured high stability under moisture-containing ODHP conditions, outperforming traditionally impregnated BOx catalysts. This work presents a facile structural design principle for developing highly stable boron-based ODHP catalysts.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yeshun Tian,Xuefeng Gao,Yongsheng Li,Yanjie Liu,Changliang Wu,Xiao Xia,Yansheng Wang,Zongming Liu,Hao Liu,Runhe He,Guangbin Duan
Polymerization-programmed La–N 4 S 2 single-atom sites accelerate solid–solid conversion in SPAN. • Low-temperature sulfurization stabilizes isolated La sites within a nanoflower-derived framework. • La–N 4 S 2 motifs enhance local polarity and electronic coupling to strengthen Li 2 S x interactions. • La 2.5 –FSPAN retains 1328 mAh g −1 after 100 cycles at 4.5 mg cm −2 and E/S = 10 μL mg −1 . • La w –FSPAN delivers low polarization, strong rate capability, and long-term cycling durability. Sulfurized polyacrylonitrile (SPAN) cathodes suppress polysulfide shuttling yet remain limited by sluggish solid–solid conversion under practical conditions. Here, a polymerization-programmed strategy is developed to embed trace La into a nanoflower polyacrylonitrile scaffold (FPAN), where La is pre-organized through interactions with N-containing functionalities during polymerization, followed by low-temperature sulfurization to afford sulfurized FPAN (FSPAN) with isolated La sites of predominant La–N 4 S 2 six-coordination. The La–N 4 S 2 motif intensifies local polarity and induces pronounced p – d hybridization, driving site-centered charge redistribution that enhances Li + affinity and interfacial electronic coupling for the Li 2 S x ( x = 4, 2, 1) conversion sequence and facilitates Li 2 S reactivation during charge. Benefiting from the synergy between the La–N 4 S 2 single atoms and the interconnected nanoflower-derived framework, La 2.5 –FSPAN retains 1262 mAh g −1 after 150 cycles at a sulfur loading of 4.5 mg cm −2 with E/S = 10 μL mg −1 , and delivers 769 mAh g −1 at 10C under a sulfur loading of 1.5 mg cm −2 . This work establishes polymerization-guided atomic engineering as a low-temperature route to accelerate solid–solid conversion in SPAN cathodes under practically relevant constraints. Download: Download high-res image (129KB) Download: Download full-size image
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yuyan Tang,Tingting Fan,Arslan Hameed,Yuanhang Ma,Wenxiang Sheng,Yawei Li,Ping Chen,Peng Li
To address the escalating global energy demand and advance sustainable hydrogen production, we report the rational design of a carbon-encapsulated La-doped Ni 2 P/NiSe heterojunction electrocatalyst on nickel foam (La-Ni 2 P/NiSe@C/NF) via synergistic La doping and interface engineering for enhanced urea oxidation reaction (UOR). La induces porous, wrinkled nanosheets, boosting surface area (11.89 m 2 g -1 ), enhancing active site exposure. The Ni 2 P/NiSe heterointerfaces generate built-in electric fields that accelerate interfacial charge transport. XPS, EXAFS, and in situ Raman confirm La doping modulates Ni 3+ electronic structure, thereby shifting the Ni²⁺/Ni³⁺ redox transition to lower potentials, thereby shifting the Ni 2+ /Ni 3+ redox transition to lower potentials. The La-Ni 2 P/NiSe@C/NF exhibits excellent UOR activity in an alkaline electrolyte, delivering a current density of 10 mA cm -2 at 1.296 V (vs. RHE). Remarkably, it achieves a low Tafel slope of 32.73 ± 0.73 mV dec -1 . These performance metrics surpass both control samples and state of the art benchmark materials. Moreover, a two-electrode electrolyzer assembled with La-Ni 2 P/NiSe@C/NF||Pt/C/NF exhibits exceptional 250 h stability at 50 mA cm -2 , underscoring the efficacy of rare-earth doping and heterointerface engineering for high-performance UOR.
研究领域:
电催化
·
材料科学
·
能量转换
·
可持续能源
·
纳米材料
·
界面工程
·
稀土掺杂
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）