JOURNAL OF THE ENERGY INSTITUTE
·
2026
·
IF 6.5
Weixin Xu,Shuomei Wang,Songze Wang,Wenqi Sang,Chen Fan,Sicong Tian,Zongguo Wen,Lujia Han
Thermochemical conversion of lignocellulosic biomass into syngas contributes to renewable hydrogen and carbon utilization, advancing the development of carbon-neutral energy solutions. However, the current biomass gasification process suffers from high energy consumption due to the need for excessive steam input. In this study, a series of CeO 2 -supported Ni catalysts with tailored oxygen vacancy concentrations was prepared by doping Gd, Zr, and La as promoters into the support, aiming to enable the catalytic self-reforming of real biomass volatiles without exogenous steam. Comprehensive characterization techniques, including electron paramagnetic resonance (EPR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS), revealed the critical role of surface oxygen vacancy concentration in determining the catalytic activity. The optimized 10Ni/CeLaO 2 catalyst achieved a total crude syngas yield of 15.4 mmol·g straw −1 at 700 °C, which is 70.4% higher than the non-catalytic system and 20.1% higher than undoped 10Ni/CeO 2 . Moreover, it also exhibits excellent stability with 87.3% oxygen vacancy retention and minimal carbon deposition (0.09 g g H2 −1 ) after reaction. This study provides key insights into the potential of employing oxygen vacancy engineering for efficient biomass thermochemical conversion without exogenous steam input.
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高影响因子
RARE METALS
·
2026
·Vol. 45
·期 5
·e70269
·
IF 12.1
Yu Cui,Liuyi Huang,Jingwen Zhao,Jiyang Liu,Wei Hu
en This link goes to a English section zh This link goes to a Chinese section The precise quantification of cytokines is crucial for monitoring disease onset and progression. Herein, we developed a synergistic signal amplification approach by utilizing nanoreactor-encapsulated CeO 2 nanozymes, which were in situ electrodeposited within the mesoporous silica nanochannel film (SNF) grown on indium tin oxide (ITO) electrodes (CeO 2 @SNF/ITO). Notably, CeO 2 @SNF/ITO possesses bifunctional enzyme-like activities, enabling efficient regulation of two co-reactants, including endogenous dissolved oxygen (DO) and exogenous hydrogen peroxide (H 2 O 2 ). Under neutral pH conditions, electrochemical reduction of the encapsulated CeO 2 leads to the transformation of Ce(IV) into Ce(III). The resulting Ce(III) species not only facilitates the oxygen reduction reaction through its oxidase-like activity but also catalyzes H 2 O 2 decomposition via peroxidase-like behavior. This process leads to the abundant generation of reactive oxygen species (ROS), which can effectively oxidize luminol anions, thereby significantly enhancing the cathodic electrochemiluminescence (ECL) signal. The reversible Ce(III)/Ce(IV) redox cycle also confers outstanding electrode reusability. As a proof of concept, an immunosensor for selective detection of the cytokine interleukin 6 (IL-6) was constructed by modifying the outer surface of the SNF. The proposed immunosensor exhibits high sensitivity for IL-6 detection, achieving a remarkably low detection limit of 2.5 fg mL −1 over a concentration range from 10 fg mL −1 to 10 ng mL −1 . This work offers a promising avenue for expanding the functional scope of SNF-confined nanozymes in advanced ECL systems for immunosensing. 摘要 en This link goes to a English section zh This link goes to a Chinese section 细胞因子的精确定量对监测疾病的发生与进展至关重要。在此,我们利用纳米反应器封装CeO 2 纳米酶,开发了一种协同的信号放大方法。通过原位电沉积技术将CeO 2 纳米酶封装于生长在氧化铟锡(ITO)电极上的介孔二氧化硅纳米通道薄膜(SNF)内,制备CeO 2 @SNF/ITO。值得注意的是,CeO 2 @SNF/ITO具有双重类酶活性,能够高效调控内源性溶解氧(DO)和外源性过氧化氢(H 2 O 2 )两种共反应物。在中性pH条件下,通过电化学还原可以使封装的CeO 2 中的Ce(IV)转化为Ce(III)。生成的Ce(III)不仅可以凭借其类氧化酶活性促进氧还原反应,还能通过类过氧化物酶行为催化H 2 O 2 分解。上述两个过程可积累大量的活性氧物种(ROS),有效氧化鲁米诺阴离子(LH − ),从而显著增强阴极电化学发光(ECL)。可逆的Ce(III)/Ce(IV)氧化还原循环还赋予了电极出色的可重复使用性。作为概念验证,通过在SNF外表面修饰抗体,构建了用于细胞因子白细胞介素-6(IL-6)检测的免疫传感器。该传感器能够实现对IL-6的超灵敏检测,检测线性范围为10 fg mL −1 至10 ng mL −1 ,检测限低至2.5 fg mL −1 。
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124861
·
IF 7.5
Shuaishuai Zhang,Jun Zhang,Limei Sun,Yulong Feng,Jiaxi Wang,Yiheng Chi,Kunling Jiao,Yao Zhang,Alireza Babaei,Wenyi Tan
Despite the great potential of capacitive deionization (CDI) in low-cost and eco-friendly phosphate wastewater treatment, the insufficient active sites and sluggish electrochemical kinetics of conventional electrode materials severely limit its dephosphorization performance. Herein, a series of La-doped CeO 2 composites were successfully fabricated via a MOF-derived calcination strategy. Moderate La doping induces abundant surface oxygen vacancies and Ce 3 + active sites while maintaining the original rod-like morphology and cubic fluorite structure of CeO 2 . Benefiting from the optimized defect configuration and porous structure, the optimal La 0.5 CeO 2 electrode achieves rapid electron migration and ion transport, and exhibits a high specific capacitance of 42.53 F/g at 2 A/g. Profiting from the excellent electrochemical characteristics, the La 0.5 CeO 2 electrode delivers excellent CDI dephosphorization performance with a high phosphate electrosorption capacity of 11.5 mg P/g at 1.2 V, a superior charge efficiency of 139.45% and a low energy consumption of 0.19 kWh/kg P, and maintains 99.5% of its initial performance after 20 cycling tests. The excellent phosphate removal capability originates from the synergistic effects of electric-field-driven electrostatic adsorption, oxygen vacancy-mediated ligand exchange and strong Ce/La–O–P chemical coordination. This work provides a feasible strategy for the design and fabrication of high-efficiency rare-earth-based electrodes for CDI water purification.
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高影响因子
SURFACE AND INTERFACE ANALYSIS
·
2026
·
IF 2.7
Huiling Jia,Yuequan Jian,Jiayi Lv,Jinxiu Wu,Xiaoxiong Ma
The double-shell P (MMA-MPS)/SiO 2 /CeO 2 composite abrasive was designed and prepared through the soap-free emulsion polymerization, the sol–gel method, and the in situ chemical precipitation method. Take 3-(methacryloyloxy)propyltrimethoxysilane-modified methyl methacrylate (P (MMA-MPS)) microspheres as the core. The a SiO 2 and b SiO 2 inner shells were coated on the core in acidic and alkaline environments, respectively. The CeO 2 outer shell was then deposited on the inner shell. The morphology, structure, and chemical mechanical polishing performance on KDP crystals of composite abrasives were characterized using SEM, TEM, XRD, FTIR, XPS, and AFM. The results indicate that the P (MMA-MPS)/ a SiO 2 /CeO 2 abrasive possesses the “loose net-like” inner shell of a SiO 2 with the positive charge (-Si-OH 2 + ), leading to the sparser outer shell of CeO 2 and the expanded CeO 2 lattice. After polishing, the surface roughness (Ra) of KDP crystal is 0.69 nm, and the material removal rate (MRR) is 125.6 nm/min. The P (MMA-MPS)/ b SiO 2 /CeO 2 abrasive possesses the “dense strawberry-like” inner shell of b SiO 2 with the negative charge (-Si-O − ), which facilitates the uniform deposition of Ce 3+ through electrostatic adsorption, and forms the dense, complete and highly crystalline outer shell of CeO 2 . The proportion of Ce 3+ is increased by 2.5%. After polishing, the Ra of the KDP crystal further decreases to 0.43 nm, and the MRR increases to 146.2 nm/min. In summary, the comprehensive performance of the P (MMA-MPS)/ b SiO 2 /CeO 2 abrasive is superior to that of the P (MMA-MPS)/ a SiO 2 /CeO 2 abrasive.
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ACS Catalysis
·
2025
·
IF 13.1
Fang Huang,Aihao Xu,Xiangyu Chen,Huanhuan Sun,Siyu He,Dong Wei,Boran Wang,Anxiang Guan,Xucai Yin,Jing Xu,Huibing He
The direct electrocatalytic conversion of carbon dioxide to methane using water as a medium is a reliable way to store intermittent renewable energy and solve environmental problems. However, in such multielectron/proton transfer reactions, the role of water is often overlooked. Specifically, the sluggish kinetics of water dissociation limit the effective proton supply during methane formation. Here, we propose a copper-doped CeO2 catalyst with frustrated Lewis pairs (FLPs), which can effectively reduce carbon dioxide to methane. Combined experimental analysis and theoretical calculations reveal that the synergistic interaction between Cu and FLPs forms an f-p-d gradient orbital coupling system, which significantly promotes water dissociation to generate active protons and optimizes the adsorption behavior of the *H and *COOH intermediates. Even at the large current density of −273 mA cm–2, the Faraday efficiency of Cu/CeO2-FLPs for methane was as high as 78.0%, with a conversion frequency of 15784.1 h–1 in the flow cell. This work provides a strategy for the rational design of efficient multipoint catalytic systems.
研究领域:
催化化学
·
电化学
·
材料科学
·
可再生能源
·
环境科学
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jinlong Cui,Chengui Zhang,Yalong Li,Yang Liu,Weijun Jiang,Yuhui Wen,Zhenxi Wang,Zhonghua Yu,Xiangrong Ren,Zhifu Zhang
The selective hydrogenation of cinnamaldehyde (CAL) is a key reaction for producing valuable intermediates in pharmaceuticals, fragrances, and fine chemicals. However, achieving high selectivity toward the C=O bond reduction of CAL under mild conditions remains challenging. In this study, an efficient and sustainable photocatalytic strategy for the selective transfer hydrogenation of cinnamaldehyde to cinnamyl alcohol under mild conditions was reported. The low-loading 0.5 wt% Au/TiO 2 -CeO 2 and 0.5 wt% Pt/TiO 2 -CeO 2 catalysts were prepared by sol–gel and ultraviolet deposition method. Experimental results show that heterojunction is formed by doping CeO 2 with TiO 2 . The light absorption of materials is redshifted, and the separation of photogenerated electron-hole pairs is enhanced, thereby reducing the load usage of precious metal. The 0.5 wt% Au/TiO 2 -CeO 2 catalyst exhibits optimal performance under visible light irradiation, while the 0.5 wt% Pt/TiO 2 -CeO 2 catalyst exhibits excellent activity under ultraviolet light irradiation. The conversion efficiency in 0.5 wt% Au/TiO 2 -CeO 2 catalytic system under visible light is 97.23 %, and the selectivity can reach 96.91 %. Recycling tests verified the structural stability and reusability of the prepared catalysts. The formation of heterojunction structures can effectively reduce the load of precious metal while maintaining high conversion and selectivity. These findings provide a new pathway for achieving highly selective CAL hydrogenation under mild conditions.
研究领域:
催化化学
·
材料科学
·
光催化
·
绿色化学
·
化学工程
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Zhuo Wei,Huaqiang He,Yiyi Lin,Tian C. Zhang,Shaojun Yuan
To effectively prevent the diffusion of corrosive ions from the external aqueous environment to the coating, as well as the permeation of ions from the coating into the underlying metal substrate, this study employed a simple spray coating method to construct a diatomite-based bilayer composite coating (referred to as OCDPD) on an AZ31B magnesium (Mg) alloy substrate. This OCDPD coating consisted of a bottom conductive polymer layer, which is a poly(3,4-ethylenedioxythiophene)-loaded diatomite/epoxy resin coating (PD), and a superhydrophobic top layer, which is an octadecyltrimethoxysilane modified CeO 2 @diatomite/epoxy resin coating (OCD). The as-prepared bilayer composite coating exhibited superior superhydrophobicity and self-cleaning capabilities, achieving a corrosion inhibition efficiency of 99.11 % after 168 h of immersion in a 3.5 wt% NaCl solution. Additionally, the OCDPD coating exhibited higher stability in salt spray tests compared to both single-layer coatings (OCD and PD). This study not only demonstrates the exceptional efficacy of the innovative composite coating in protecting Mg alloys from corrosion, but also provides a novel perspective on integrating conductive polymer coatings with superhydrophobic coatings as a comprehensive strategy for corrosion protection .
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
·
高分子材料
·
纳米复合材料
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高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Lei Tian,Yuhao Zhang,Luting Yan,Qi Guo,Zekun Ren,Chao Wang,Falan Li,Qingqing Yang,Xia Sun,Yemin Guo,Yanyan Zhang
In this paper, a dual-potential-resolved label-free signal transduction electrochemiluminescence (ECL) biosensor based on hydrogen peroxide system was constructed by using CeO 2 -Au to modify the electrode, and selecting CdS QDs and DPEA-AuNCs as independent cathodic and anodic ECL light sources. CeO 2 -Au improves the conductivity and interfacial environment of the working electrode, immobilizes the DNA strand of the hairpin structure through Au-S bonding, and also catalyzes the generation of a large amount of superoxide anion from hydrogen peroxide. In order to achieve specific detection, CdS QDs and DPEA-AuNCs were selected to modify the aptamers, respectively, and two targeted functional probes were designed to recognize Staphylococcus aureus and Vibrio parahaemolyticus , respectively, and to detect these two food-borne pathogens simultaneously by two-potential discrimination. After a series of tests and validations, the sensor exhibited good selectivity and sensitivity, showcasing its significant potential in the realm of food safety detection and offering an effective method for the concurrent detection of various pathogenic bacteria in food.
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高影响因子
MOLECULES
·
2025
·Vol. 30
·期 11
·2301
·
IF 4.6
Wenying Wu,Wenhao Yao,Yitong Liu,Senliang Xi,Teng Zhang
Ammonia is a promising hydrogen storage material because it is easy to store and decompose into COX-free hydrogen. A Ru-based catalyst exhibits good catalytic performance in ammonia decomposition, and enhancing the interaction between the Ru atoms and the support is an important way to further improve its catalytic activity. In this study, CeO2was prepared by calcination using a cerium-based metal–organic framework (MOF) as the precursor, and the number of oxygen vacancies on the surface of CeO2was regulated by hydrogen reduction. The XPS and Raman results showed that abundant oxygen vacancies were formed on the surface of these CeO2, and their number increased with an increase in the reduction time. The Ru/CeO2-4 h catalyst, using CeO2reduced for 4 h as the support, exhibited good catalytic activity in ammonia decomposition, reaching 98.9% ammonia conversion and 39.74 mmol gcat−1min−1hydrogen yield under the condition of GHSV = 36,000 mL gcat−1h−1at 500 °C. The XAFS results demonstrated that Ru was stably anchored with oxygen vacancies on the surface of CeO2via Ru-O-Ce bonds. Density functional theory calculations further showed that these bondings lower the reaction energy barrier for N-H bond cleavage, thereby significantly enhancing the catalytic activity.
研究领域:
材料科学
·
化学工程
·
能源技术
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PubMed
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Huimin Zhang,Yu Liu,Qi Li,Xinlu Zhao,Mingze Sun,Jiaxin Hou,Chuanyu Guo,Chaobo Huang,Xiaoli Cheng,Lihua Huo,Minghui Yang,Yingming Xu
High-performance humidity sensors have significant potential applications in areas such as smart homes and digital healthcare, but the limited humidity sensing performance of materials hinders their practical application. One major challenge in enhancing the sensing performance of humidity-sensitive materials is the effective regulation of oxygen vacancy content within their crystal structures. In this study, we propose a dual regulation strategy of “ligand induced-pyrolysis synergy” to control the oxygen vacancy content effectively. Specifically, Metal–Organic Framework (MOF) materials containing oxygen vacancies were synthesized using a monocarboxylic acid conditioning method. We further increased the oxygen vacancy content in the MOF derivatives by adjusting the heat treatment temperature. The prepared U6C-20-400 sensor demonstrated excellent performance across a wide humidity range of 3–97% relative humidity (RH), with a rapid response/recovery time of just 0.5 s and 1.2 s. Furthermore, it effectively monitored food as it transitioned from raw to cooked and even burnt during cooking. This study offers valuable insights for developing high quality humidity sensors tailored for next-generation smart home applications.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2016
·
IF 3.205
Xiaona Ji,Xuejiao Liu,Xiaofeng Tong,Ting Luo,Hao Wu,Xie Meng,Zhongliang Zhan
Ceria–zirconia solid solution nanoparticulates, Ce 1− x Zr x O 2− δ ( x = 0, 0.2, 0.3, 0.4, 0.6, 0.8 and 1.0), are impregnated into the porous 430L stainless steel scaffolds and evaluated as the anode catalysts for solid oxide fuel cells (SOFCs). Combined analyses of X-ray diffraction and Raman scattering reveal the fluorite cubic ( c ) structure up to x ≤ 0.3 transforms to a mixture of the cubic and metastable tetragonal ( t ″) phases for 0.4 ≤ x ≤ 0.8, with the onset of tetragonal distortions at x = 0.8. Temperature-programmed reduction in H 2 indicates that doping Zr 4+ into the ceria lattice could improve the oxygen storage capacity. Nonetheless, the charge transfer process within the bulk Ce 1− x Zr x O 2− δ or across the interfaces of Ce 1− x Zr x O 2− δ |YSZ becomes increasingly sluggish at x ≥ 0.3. The two opposite effects yield the smallest anode polarization resistances at x = 0.3, e.g. , 0.08 ± 0.01 Ω cm 2 for Ce 0.7 Zr 0.3 O 2− δ versus 0.24 ± 0.02 Ω cm 2 for CeO 2− δ or 0.26 ± 0.04 Ω cm 2 for Ce 0.4 Zr 0.6 O 2− δ at 800 °C. Furthermore, thin YSZ electrolyte fuel cells with impregnated La 0.6 Sr 0.4 Fe 0.9 Sc 0.1 O 3− δ – YSZ cathode supports produce peak power densities of 1.24 W cm −2 at 800 °C for nano-Ce 0.7 Zr 0.3 O 2− δ @430L anodes, approximately 80% higher than 0.67–0.70 W cm −2 on nano-CeO 2− δ @430L or nano-Ce 0.4 Zr 0.6 O 2− δ @430L anodes.
研究领域:
材料科学
·
能源科学
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Jiahao Liu,Xiaojie Jin,Xi Lu,Xinyu Huang,Hongyan Chen,Long Qiu,Xiaowei Huang,Yongxiu Li,Jing Li
The application of rare earth micro-nano materials requires first formulating them into slurries with high dispersion stability, including polishing powders, catalysts, phosphors, ceramics, and other materials. To achieve this, it is essential not only to prepare monodisperse micro-nano particles but also incorporate appropriate dispersants to prevent particle aggregation. For this purpose, the study designed and synthesized a core-shell structured Gd 3 + -doped CeO 2 -coated SiO 2 composite abrasive: SiO 2 /CeO 2 :Gd. Low-field nuclear magnetic resonance technique was employed to investigate the sedimentation behavior of polishing slurries and explore the mechanism by which different dispersants enhance slurry dispersion stability, achieving real-time nuclear magnetic resonance imaging tracking of the sedimentation process. Results show that: The strong paramagnetic properties of Gd 3+ significantly enhance the relaxation efficiency of water molecules within the particle surface region, thereby serving as a sensitive probe for characterizing the liquid environment at the particle surface. Based on the T 2 distributions, settling can be divided into three stages: homogenization, sedimentation, and agglomeration. In polishing slurries, water molecules primarily exist in three forms: bulk water (P1), hydration layer water (P4) and surface-bound water (P5), attributing to different peaks of T 2 relaxation times. However, only one T 2 peak (P2) was observed for the homogenization slurry due to the rapid exchange among the three kind of water molecules. With the sedimentation proceeding, P2 transforms into two peaks of P1 and P3. The rate of change in the peak areas of P1 and P2 can reflect the sedimentation rate of the slurry. In the agglomeration stage, the overlapping of hydration layers forms interstitial water, leading to an increase in its T 2 relaxation time. Therefore, the P3 can further split into two peaks of P4 and P5, corresponding to interstitial water and surface-bound water in the sediment layer.
研究领域:
材料科学
·
核磁共振（NMR）
·
化学机械抛光（CMP）
·
胶体与界面科学
·
纳米技术
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高影响因子
危险品化学品经营许可证（带存储）