JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Dai Xinxin,Yan Xinyuan,Wu Jianguang,Liu Yi,Deng Xiaolong,Huang Jinzhao,Li Yibing,Ji Yuexia
In this study, the electroactive Ni 3 S 2 /Ce 2 S 3 heterostructure (denoted as Ce–Ni(OH) 2 –S) was achieved by a facile one-step hydrothermal approach through the incorporation of Ce and sulfur into Ni(OH) 2 . The effect of Ni 3 S 2 /Ce 2 S 3 heterostructure on electrocatalytic water splitting is investigated in detail in 1.0 M KOH. The as-prepared Ce–Ni(OH) 2 –S exhibits long-term stability and excellent catalytic activity at a current density of 100 mA cm −2 with overpotentials of 327 mV and 356 mV for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), respectively. Serving as bifunctional catalysts, the Ce–Ni(OH) 2 –S electrode merely requires a 1.519 V cell voltage to reach 10 mA cm −2 . The synergistic effect of the metal sulfide heterojunction (composed of Ce and Ni) effectively facilitates reactant transfer and electron migration, thereby significantly enhancing the electrocatalytic activity. Furthermore, the catalytic performance is further enhanced with the overpotentials of 312 and 284 mV for OER and HER, respectively, by applying visible light irradiation. This work offers a new strategy for improving the electrocatalytic performance of water splitting under visible light irradiation condition.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·Vol. 46
·期 2
·117844
·
IF 6.2
Zhuangzhuang Ma,Yunhao Wang,Tianhao Rui,Yulin Lan,Linyuan Lu,Yang Yu,Mingxuan Deng,Tianxing Lan,Zhekang Zhao,Zhen Teng,Haibin Zhang
High-entropy pyrochlore ceramics with the nominal composition Eu 2 B 2 O 7 , incorporating up to five equiatomic B-site cations, were synthesized via a solid-state reaction method and evaluated their aqueous chemical durability for nuclear waste immobilization. Comprehensive characterization using XRD, Raman, and SEM analyses confirmed the formation of a single-phase pyrochlore structure with uniform and random elemental distribution. However, secondary phases were observed in the Ce- and Nb-doped samples, which is attributed to the larger ionic radius of Ce and the higher valence state of Nb. The 42 days leaching tests revealed normalized element release rates ranging from 10 −5 to 10 −7 g/(m 2 ∙d), significantly lower than those of conventional pyrochlore materials. This enhanced durability is attributed to synergistic effects of electronegativity, ionic radius, and atomic number, which together hinder cation diffusion and strengthen chemical durability at the B site. These findings demonstrate the potential of Eu 2 B 2 O 7 high-entropy pyrochlore ceramics as long-term host materials for high-level radioactive waste. This study provides a valuable resource for enriching the thermophysical properties database of B-site high-entropy pyrochlore solidification, thereby supporting their engineering development.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2024
·
IF 8.4
Jie Peng,Jie Jiang,Shuoguo Yuan,Pengfei Hou,Jinbin Wang
Ferroelectric materials are ideal for self-powered sensors in Internet of Things (IoT) and high-precision detection systems due to their excellent polarization properties. Compatibility with miniaturization, high-density systems, and complementary metal oxide semiconductor (CMOS) processes is crucial for their widespread adoption. HfO 2 -based ferroelectric films show potential in self-powered pyroelectric sensors as their thinness enables effective temperature and light detection. However, the disordered ferroelectric domain distribution limits their pyroelectric performance and hampers the development of highly integrated self-powered pyroelectric devices. This report investigates the temperature and light detection capabilities of Ce-doped HfO 2 ferroelectric films, which exhibit as-grown spontaneous polarization in the downward direction, making them a promising option for self-powered pyroelectric sensors. The findings provide robust evidence that the introduction of a temperature gradient significantly enhances pyroelectricity. In addition, their applications in the detection of hot/cold wind and breathing have been proved. Notably, the 30 nm thick Ce-doped HfO 2 ferroelectric film has a high pyroelectric coefficient of about 894.7 μC·m −2 ·K −1 and enables high-precision detection of changes in temperature of 0.1 K. This study highlights the potential application of HfO 2 -based ferroelectric films in self-powered sensors with temperature and light detection capabilities, making them a promising candidate for future IoT-based systems and high-precision detection systems.
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Kang Wu,Yuhai Sun,Jing Liu,Juxia Xiong,Junliang Wu,Jin Zhang,Mingli Fu,Limin Chen,Haomin Huang,Daiqi Ye
The insights on the primary surface-reactive oxygen species and their relation with lattice defects is essential for designing catalysts for plasma-catalytic reactions. Herein, a series of Ba 1−x Ce x TiO 3 perovskite catalysts with high specific surface areas (68.6–85.6 m 2 g −1 ) were prepared by a facile in-situ Ce-doping strategy and investigated to catalytically decompose toluene. Combining the catalysts with a nonthermal plasma produced a significant synergy effect . The highest decomposition efficiency (100%), CO x selectivity (98.1%), CO 2 selectivity (63.9%), and the lowest O 3 production (0 ppm) were obtained when BC 4 T (Ce/Ti molar ratio = 4:100) was packed in a coaxial dielectric barrier discharge reactor at a specific input energy of 508.8 J L −1 . The H 2 -TPR, temperature-programmed Raman spectra , EPR and OSC results suggested that superoxides ( • O 2 − ) were the primary reactive oxygen species and were reversibly generated on the perovskite surface. Molecular O 2 was adsorbed and activated at the active sites (Ti 3+ -V O ) via an electron transfer process to form • O 2 − . Surface-adsorbed • O 2 − had a greater effect on the heterogeneous surface plasma reactions than the dielectric constant , and enhanced the toluene decomposition and intermediate oxidation . A possible reaction path of toluene decomposition was also proposed.
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Hongsheng Liu,Hengyue Li,Bin Huang,Yange Yang,Haibo Guo,Yan Xiao,Weiguang Yang
To enhance the proton conductivity and durability of Ce-based hybrid proton exchange membranes (PEMs), this study fabricates modified perfluorosulfonic acid (PFSA) hybrid membranes by incorporating the dual-function γ-AlOOH@Ti-supported CeO 2 composite oxide (γ-AlOOH@Ti/CeO 2 ). In addition to combining the inherent proton conductivity of γ-AlOOH with the excellent radical scavenging ability of CeO 2 , both the proton conductivity and durability of Ce-based PEMs are further improved by introducing Ti-dopant, which not only increases hydrogen vacancies on the surface of γ-AlOOH, which facilitate proton conduction, and induces electron transfer from γ-AlOOH@Ti to CeO 2 , which enhance free radical adsorption. As results shown, the proton conductivity and the fluoride release value of the resulting hybrid membrane are about 76 % higher and 35.25 % lower than those of the PFSA-CeO 2 membrane, respectively. Moreover, the performance of cells shows that, after accelerated degradation testing, the PFSA-γ-AlOOH@Ti/CeO 2 membrane exhibits the lowest peak power density decrease rate, the impedance increase rate and hydrogen crossover current density, with 11.79 %, 27.54 % and 3.04 mA cm −2 , respectively. These results suggest that compared to CeO 2 -hybrid PEMs, γ-AlOOH@Ti/CeO 2 -based hybrid PEMs exhibit higher proton conductivity and superior chemical stability, indicating the potential application of γ-AlOOH@Ti/CeO 2 -based hybrid PEMs in proton exchange membrane fuel cells.
✓ 已验证
DOI
高影响因子
BIOMASS & BIOENERGY
·
2021
·
IF 5.061
Chenlong Liu,Plaifa Hongmanorom,Jangam Ashok,Dong Chen,Qiao Wu,Wenju Wang,Zhigang Wang
Conversion of biomass tar to useful hydrogen-rich syngas will solve environmental issues related to tar emission as well as increase the overall efficiency of biomass conversion . There are various catalysts to achieve that. In this study, La 1-x Ce x Ni 0.8 Fe 0 . 2 O 3 (0 ≤ x ≤ 1) is selected, and acetic acid has been used as a biomass tar model. Fixed-bed reactor was used for this investigation, while the catalyst characterization has been done mainly by X-ray Adsorption spectroscopy (XAS), X-ray diffraction (XRD), CO 2 -temperature programmed desorption (TPD). The results showed that La 0 . 8 Ce 0 . 2 Ni 0 . 8 Fe 0 . 2 O 3 has the highest acetic acid conversion (68.7%) and hydrogen yield (63.6%). Which is attributed to its more catalytic defect, stable structure and stronger basicity . Furthermore, to express more comprehensively on tar models, La 0 . 8 Ce 0 . 2 Ni 0 . 8 Fe 0 . 2 O 3 were investigated with blends of acetic acid and acetone with different mole ratios (1:0, 4:1, 3:2, 2:3, 1:4 and 0:1) in temperature ranges (500 °C–900 °C), and weight hourly space velocity (WHSV = 12.02 h −1 -15.63 h −1 ). The highest carbon conversion (85.7%) and hydrogen yield (88.5%) were obtained at 600 °C, mole ratio = 4:1, and WHSV = 14.43 h −1 . It is noted that the result of the blend was better; however, based on in situ diffuse reflectance infrared fourier transform spectroscopy ( in-situ DRIFTS) investigation, the enhancement ascribed to inhibition of ketonization reaction was occurred with pure acetic acid. In addition, high reaction temperature and weight hourly space velocity decrease the catalytic activity by accelerating sub-reaction and graphitization coke deposition. In a word, La 0 . 8 Ce 0 . 2 Ni 0 . 8 Fe 0 . 2 O 3 catalyst shows good performance with hydrogen yield over 70% during 1440 min at optimum conditions.
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2017
·Vol. 19
·期 7
·5333-5342
·
IF 4.123
Shu-xian Wang,Rui-tang Guo,Wei-guo Pan,Ming-yuan Li,Peng Sun,Shu-ming Liu,Shuai-wei Liu,Xiao Sun,Jian Liu
It was well recognized that Pb had a poisoning effect on a SCR catalyst. In this study, the deactivation mechanism of Pb on the Ce/TiO2 catalyst was investigated based on the characterization results of TPD and in situ DRIFT studies. It was found that the addition of Pb on the Ce/TiO2 catalyst not only inhibited the adsorption and activation of NH3 species, but also led to the decrease of the activity of adsorbed NH3 species in the SCR reaction. The adsorption of NOx species and the oxidation of NO by O2 over the Ce/TiO2 catalyst were also suppressed by the addition of Pb, while the reactivity of adsorbed NO2 species did not decrease. Moreover, the results revealed that the NH3-SCR reaction over the Ce/TiO2 catalyst followed both the E–R and L–H mechanisms, while the NH3-SCR reaction over Ce/TiO2-Pb was mainly controlled by the L–H mechanism. The contributions of the L–H mechanism to the SCR reactions over Ce/TiO2 and Ce/TiO2-Pb decreased with increasing reaction temperature. The deactivation of Ce/TiO2-Pb was mainly attributed to the suppressed NH3 adsorption and activation, accompanied by the inhibited NO oxidation and the decrease of Brønsted acid sites.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Linjing Duan,Huali Jin,Yang Wen,Min Wei,Rui Guo,Zhiguang Suo,Keshavan Niranjan
As a food and environmental contaminant having harmful qualities like neurotoxicity and carcinogenicity, acrylamide (AA) is a risk to human health. In this study, Ce-MOF@AuPd NFs were utilized as electrode modification materials to develop a signal-off electrochemical aptasensor in combination with Mg 2 + -dependent DNAzyme-driven 3D DNA walker and triplex molecular switch (THMS) for the sensitive detection of AA. Ce-MOF@AuPd NFs exhibit an expansive surface area and enhanced conductive properties, enabling the binding of substantial DNA sequences and speeding up electron transfer. The Mg 2+ -dependent DNAzyme-driven 3D DNA walker improves the nucleic acid shearing efficiency with excellent signal amplification performance, and combines with the DNA-specific structure THMS to further boost sensor sensitivity. The sensor also demonstrated excellent specificity, reproducibility, repeatability, and stability, along with achieving satisfactory recovery rates when tested on potato chips and coffee samples. The electrochemical aptasensor offers strong application prospects for AA detection in food, according to the results.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 37
·21175-21185
·
IF 3.049
Liuyi Pan,Yulong He,Menglong Niu,Yong Dan,Wenhong Li
Ni–M/SiO2 with different binary metals M (M = Ce, Co, Sn, Fe) prepared by an incipient impregnation method was used in the hydrodeoxygenation (HDO) of low-temperature coal tar distillate, which is rich in phenolic compounds. p-Cresol, as a model compound of the distillate, was used to evaluate the activity and selectivity of BTX products on the series of reduced Ni–M/SiO2 catalysts in a fixed bed reactor. The properties of the catalysts were characterized by N2 adsorption–desorption, ICP-AES, XRD, H2-TPR, and XPS. Benzene and toluene as the direct deoxygenation (DDO) products and cyclohexane and methylcyclohexane as the hydrogenolysis (HYD) products were detected to evaluate the selectivity of the path in the deoxygenation process. In this series of catalysts, the order of reactivity was Ni–Ce > Ni–Sn > Ni–Co > Ni–Fe > monometallic Ni. Meanwhile, the addition of Ce and Co loaded in the Lewis acid sites of the catalyst affected the electron distribution of nickel atom and its atomic arrangement on the surface of the carrier. Compared to monometallic Ni, the DDO path become dominant on Ni–Ce and Ni–Co and the selectivity for BTX products increased from 58.8% to 77.4% and 71.1%, respectively. The binary metal Sn, unlike the former two metals, formed a Ni3Sn crystal form with Ni, which resulted in significant enhancement of the HYD path while obviously increasing the reactivity.
✓ 已验证
DOI
PubMed
高影响因子
Chemistry of Heterocyclic Compounds
·
2021
·Vol. 57
·期 7
·806-816
·
IF 1.277
An Xiaoying,Gao Lei,Wang Mingliang,Wu Haitao,Wang Lanzhi
Novel, efficient and environmentally friendly approaches have been developed for the synthesis of 1,5-benzodiazepine-2,3-dicarboxylates by one-pot three-component domino reactions in the presence of a catalytic amount of γ-Fe 2 O 3 @SiO 2 /Ce(OTf) 3 in EtOH at ambient temperature. A total of 32 2,5-dihydro-1 H -1,5-benzodiazepine-2,3-dicarboxylates and 2-methyl-2,3-dihydro-1 H -1,5-benzodiazepine-2,3-dicarboxylates with enamine or imine structure of the heterocycle, respectively, were obtained in good yields by reacting substituted 1,2-phenylenediamine, β-carbonyl esters, and ethyl glyoxylate or ethyl pyruvate. One-pot reactions were successfully realized to form one new cycle and four new bonds (one C–C, two C–N, one C=C or two C–C, one C–N, one C=N). Furthermore, plausible mechanisms for the formation of 1,5-benzodiazepine-2,3-dicarboxylates have been proposed. The salient features of this reaction include short reaction time, mild reaction conditions, moderate to excellent yields, recyclability of the catalyst, and wide substrate scope.
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Siyu Ma,Shufei Wang,Shuguang Wang,Xinze Chen,Hongyuan He,Xiaoxin Zhang,Shuo Zhai,Qingyang Han,Pengfei Zhang,Kai Zhao,Ning Yan,Yue Tie,Ding Ding,Xingyu Chen,Yingru Zhao,Meidan Ye,Abdullah N. Alodhayb,Zhou Chen,Yanping Zheng,Jianhui Li,Yifei Sun
Perovskite oxides are promising anodic electrocatalysts for alkaline saline water electrolysis, yet their performance is often limited by sluggish oxygen evolution reaction kinetics and competing chloride corrosion. Building on Pr0.1Sr0.9Co0.5Fe0.5O3 (PSCF), a candidate previously identified via our transfer learning paradigm, we further leveraged data-driven compositional searching of the A-site configuration, which led to an optimized catalyst with a proper Ce/Sr/Pr ratio (Ce-PSCF). The asymmetric Ce–O–Co motifs invoked a negative charge-transfer regime and activated the evolution of nonbonding oxygen (ONB) states, which reconciled the activity-stability trade-off and promoted a dual-site intramolecular lattice oxygen mechanism, as evidenced by promoted 18O–18O evolution. The electrolyzer with Ce-PSCF lowered the overpotential of the PSCF-based one by 100 mV at 300 mA cm–2 and exhibited 15-fold greater durability. Electrochemical analysis revealed a higher reaction order, promoted *OH coverage, and faster surface reconstruction on the Ce-incorporated electrocatalyst, indicating *OH-controlled chemical-step kinetics. Theoretical insight inferred a variation of the rate-determining step from O–O coupling to secondary OH– refilling with a reduced energy barrier from 0.68 to 0.54 eV. Moreover, ab initio molecular dynamics simulations visualized a dynamically strengthened affinity for OH– and significant repulsion of Cl–, arising from its intrinsic Lewis acidic and basic microenvironment.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xin Mi,Xiang Li
Pharmaceutically active compounds (PhACs) are ubiquitously detected in water matrices, arousing growing concern. Effective abatement of these toxic environmental contaminants is challenging but of great importance. Ce-based MOFs have been considered novel metal–organic framework (MOFs)-based photocatalysts in water treatment. However, limited light absorption ability, fast recombination of photogenerated carriers, and water stability limited the further application. Here, the UiO-66 (Ce) was successfully constructed onto the surface of a series of graphene oxide (GO) (1 mg ∼ 7.5 mg) in situ. GO with oxygen-containing functional groups (OCFGs) increased the adsorption (∼45 %) of the trace amount of sulfamethoxazole (SMX) (200 μg/L) over the interfaces and enhanced the degradation efficiency of SMX. The composite with the optimal ratio (GO@ UiO-66 (Ce)-5) significantly increased the charge separation ability and produced a large number of reactive oxygen species (ROS). •O 2 – was proved to be the major driving reactive substance for SMX degradation with the calculated steady-state concentration of 2.5 × 10 -9 M (∼1.37 times higher with bubbled oxygen), which is much higher than that of detected •OH (1.62 × 10 -14 ). Major operational parameters including dissolved oxygen, initial solution pH, and catalyst dosages were investigated systematically. Several intermediates were identified by high-performance liquid chromatography coupled with triple quadrupole mass spectrometry (HPLC-MS/MS). By choosing the strategy, MOFs were closely bonded to the surface of the GO matrix, making the leakage of Ce ions inhibited obviously (∼3 times) in the water treatment process. This study offers useful guidance for improving the performance of existing photocatalytic materials for PhACs removal.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）