LANGMUIR
·
2025
·
IF 3.9
Xianmin Gong,Shijun Xu,Yiling He,Kaijun Wei,Quangang Chen,Qing Yuan,Yi He,Yi Fan,Xingtao Cheng
Metal-based composite coatings have been widely studied for their excellent properties. In order to improve the properties of nickel tungsten boron (Ni–W–B) matrix, Ni–W–B/PC coatings were prepared by electrodeposition in the presence of polydopamine functionalized VC (P–VC) and cerium oxide (CeO2) nanoparticles. The effect of cerium oxide content in the nanomaterials on the properties of Ni–W–B coatings was investigated. The results showed that the prepared coatings were dense, uniform, and crack-free, and the best performance was achieved at a cerium oxide content of 2 g/L. The addition of CeO2 nanoparticles can fill the tiny defects in the coating and optimize the coating structure. The addition of these two materials refines the size of the coating grains. In terms of coating performance, the corrosion resistance of the composite coating was enhanced with the addition of CeO2 at a certain P–VC concentration, and the total impedance of the composite coating was 24,030 Ω·cm2, which was 4.8 times higher than that of the Ni–W–B coating and 1.7 times higher than that of the Ni–W–B/P–VC coating. In addition, the hardness of the Ni–W–B/PC-2 composite coating reached 1033.93 HV at a CeO2 content of 2 g/L. The wear resistance of this composite coating was also optimized. Compared with the Ni–W–B/P–VC composite coating, the average coefficient of friction was reduced by 8.8%, and the wear resistance of the composite coating was further improved, which was attributed to the synergistic effect of the two materials. Moreover, the Ni–W–B/PC film has excellent hardness and corrosion resistance, which is promising for the application in harsh environments.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 30
·20663-20673
·
IF 3.9
Nusrat Shaheen,Zheng Chen,Muneerah Alomar,Tao Su,Yumei Nong,Nada Althubaiti,Muhammad Yousaf,Yuzheng Lu,Qiang Liu
Recent studies indicate that electrolyte ionic conductivity plays a pivotal role in reducing the operating temperature of solid oxide fuel cells (SOFCs). In this regard, nanocomposite electrolytes have drawn significant attention owing to their enhanced ionic conductivity and fast ionic transport. In this study, we fabricated CeO2–La1−2xBaxBixFeO3 nanocomposites and tested them as a high-performance electrolyte for low-temperature solid oxide fuel cells (LT-SOFCs). The prepared samples were characterized by their phase structure, surface, and interface property via transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS), followed by being applied in SOFCs to examine their electrochemical performance. In the fuel cells, it was found that the optimal composition 90CeO2–10La1−2xBaxBixFeO3 electrolyte-based SOFC delivered a peak power density of 834 mW cm−2 along with an open circuit voltage (OCV) of 1.04 V at 550 °C. A comparative study revealed that the nanocomposite electrolyte exhibited a total conductivity of 0.11 S cm−1 at 550 °C. Moreover, the rectification curve manifested the formation of the Schottky junction, suppressing the electronic conduction. This study conclusively shows that the addition of La1−2xBaxBixFeO3 (LBBF) into ceria electrolyte is a viable approach for constructing high-performance electrolytes for LT-SOFCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Wei She,Tianqinji Qi,Mengxing Cui,Pengfei Yan,Seik Weng Ng,Weizuo Li,Guangming Li
A family of two-dimensional salen-type lanthanide complexes was synthesized through a facile solution diffusion method. The two-dimensional lanthanide complexes were characterized by single-crystal X-ray diffraction (SCXRD) and X-ray photoelectron spectroscopy (XPS) analytical techniques. The SCXRD and XPS analyses reveal that the obtained two-dimensional structures are rich in uncoordinated imine (−CH═N−) groups located on the skeleton of the salen-type organic ligand, which retain strong coordination ability with metal ions. On the basis of this unique feature, a highly dispersed CeO2-supported Ni catalyst (Ni/CeO2-CAS) with highly strong metal–support interaction was first synthesized via a coordination-assisted synthesis (CAS) method, which exhibits a much better catalytic activity in the hydrogenation of nitrobenzene than the traditional Ni/CeO2-IWI catalyst prepared by incipient wetness impregnation (IWI). The origin of the improved catalytic activity of Ni/CeO2-CAS as well as the role of Ni@Ce–H2salen was revealed by using diverse characterizations. On the basis of the comparative characterization results, the superior catalytic performance of Ni/CeO2-CAS to Ni/CeO2-IWI could have resulted from the smaller and highly dispersed Ni nanoparticulates, the intensified Ni–CeO2 interaction, the enhanced NiO reducibility, and the higher concentration of oxygen vacancies, favoring the H2 dissociation and adsorption of the nitrobenzene reactant. The Ni/CeO2-CAS catalyst also exhibits high catalytic performance for reduction of diverse nitroarenes to their corresponding functionalized arylamines. We anticipated that this coordination-assisted strategy may provide a new way for preparing other highly oxide-supported catalysts with potential applications in various catalytic reactions.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Xiaoliang Li,Jiangjiang Feng,Michal Perdjon,Rena Oh,Wei Zhao,Xiaoyang Huang,Shusen Liu
Au-Pd bimetallic nanoparticles immobilized on series of CeO 2 supports with different morphologies, e.g. , rod, cube, and polyhedrons were prepared through the deposition-precipitation method with a consequent investigation on their catalytic performances for benzyl alcohol oxidation in the absence of solvent. The experimental results exhibited that the morphology of CeO 2 has a markedly impact on the catalytic performance of Au-Pd/CeO 2 . In which Au-Pd supported on CeO 2 rod could achieve higher benzyl alcohol conversion than that supported on CeO 2 polyhedrons and CeO 2 cube, however, CeO 2 cube supported Au-Pd showed the highest selectivity towards the production of benzaldehyde. ICP-AES, XRD, Raman, N 2 -BET, TEM, HAADF-STEM, and XPS were conducted to characterize the catalysts. The results revealed that the excellent behavior of Au-Pd/CeO 2 -rod in benzyl alcohol oxidation was closely related with the smaller size of CeO 2 particle, the higher concentration of oxygen defects in support and the higher number of Ce 3+ and Pd 2+ species on the catalyst surface. The present study on the morphologies of CeO 2 support in solvent-free benzyl alcohol oxidation would offer a notable approach for the future catalyst design.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2022
·
IF 4.383
Jie Zhou,Beibei Zhu
Dimensional regulation and heterostructure building strategy are the significant means to boost the property of semiconductor photocatalysts . Herein, CeO 2 /g-C 3 N 4 (CeCN) composites with 1D/3D structure were synthesized by compounding one-dimensional CeO 2 nanorods and three-dimensional porous carbon nitride materials. Diverse characterization methods, BET, XRD , SEM/TEM, FT-IR, XPS and UV–vis DRS , to name a few, were conducted to reveal the surface area, micro shape, crystal structure, surface functional groups and photoconductive properties of the samples. The photocatalytic properties of catalyst were estimated by photodegradation of ciprofloxacin (CIP) under visible light irradiation. The results suggested that CeO 2 nanorods with 1D structure and g-C 3 N 4 with 3D porous structure are successfully composite into 1D/3D composites without any crystal structure and surface functional groups changed. The optimal CeCN25 exhibited brilliant photodegradation performance with 96.3% degradation efficiency within 100 min under visible light irradiation. The dimension control strategy made the material form porous structure and increases the adsorption performance of the material, while the heterostructure construction strategy formed a space electric field with efficient charge separation and transfer, which prolonged charge life. The combination of two strategies was the crucial factor for the eminent catalytic activity of photocatalysts. This work supplies thinking for the directional design and synthesis of composite catalysts with high photocatalytic activity .
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yangkai Xiong,Zhiqiang Fang,Daxiong Hu,Hao Jiang,Lei Huang,Qitong Mao,Guoqing Wang,Jipeng Li,Zhenzhong Liu,Chunxin Ma
Although many antibiofouling materials have been developed based on either bacterial-killing or antiadhesion effects, the integration of both the effects in one material remains challenging for achieving highly enhanced synergistic antibiofouling. In this study, we have explored a nano-CeO2-loaded double-network hydrogel by introducing CeO2 nanorods into a polyzwitterionic hydrogel via a simple one-pot method for achieving highly efficient antifouling. First, the CeO2 nanorods dispersed in the hydrogel, as an outstanding nanozyme, have highly efficient bacterial-killing performance. Second, the superhydrophilic polyzwitterionic hydrogel provides a dense hydrated layer on the surface and subsequently excellent broad-spectrum antiadhesion behavior. Most importantly, the bacterial killing and antiadhesion of this hydrogel can work synergistically to largely improve the marine-antifouling performance. Moreover, the double-network structure of this hydrogel, including the covalently cross-linked polyzwitterion hard network and the physically cross-linked poly(vinyl alcohol) soft network, can provide greatly improved mechanical properties (2.44 MPa of tensile strength reaches and 21.87 MPa of compressive strength). As a result, among the existing marine-antifouling hydrogels, the CeO2-loaded polyzwitterionic double-network hydrogel can achieve outstanding antifouling performance, which can sustain for over 6 months in a real marine environment. This work provides a promising marine-antifouling hydrogel, which will also inspire antifouling research of a new strategy and materials.
研究领域:
材料科学
·
海洋生物学
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Baogui Ye,Zhongwei Zhao,Hongmei Liu
Construction of multi-interface contact step-scheme photocatalyst is a promising pathway to achieve high-electron transfer efficiency for photodegradation Estrone and Congo red (CR). In this work, g-C 3 N 4 was selected as the main component, CeO 2 nanosheets with unique Ce 4+ →Ce 3+ conversion property and M-rGO were loaded on the surface of g-C 3 N 4 to construct magnetic photocatalyst, whose structure imparted reusability by magnetic retrieval and at the same time M-rGO acted as an efficient host for g-C 3 N 4 /CeO 2 composite photocatalyst. The photocatalytic performances were investigated with Estrone and CR, and the results showed that the composite photocatalyst g-C 3 N 4 /CeO 2 /M-rGO could degrade 71% of Estrone and 92% of CR. Free radical scavenger test showed that superoxide and hydroxyl radical species played a major role in the degradation. Furthermore, it was demonstrated that the magnetic photocatalyst g-C 3 N 4 /CeO 2 /M-rGO possessed strong antibacterial properties against Proteus mirabilis. A three-factor-three-level Box-Behnken design (BBD) was selected to optimize three greatly influential parameters: light irradiation time (min), the mass of photocatalyst (mg) and pollution concentration (ppm) by responding surface methodology. It was expected that the g-C 3 N 4 /CeO 2 /M-rGO can be used as a magnetic photocatalyst to achieve its valorization, which has very broad development prospects in the field of environmental remediation or catalysis.
研究领域:
环境科学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Zhiyuan Kong,Sibao Liu,Hongwang Liu,Guozhu Liu
Endothermic hydrocarbon fuel is the most utilized coolant in regenerative cooling technology for the high-speed aircraft, but it is challenged by the limited heat sink and severe coke deposition. In this study, we propose liquid ammonia as a promising carbon-free fuel with high heat sink for advanced vehicles or aircrafts. The chemical heat sink originates from the endothermic decomposition reaction of ammonia. A series of Ru/CeO2–Al2O3 catalytic coatings were fabricated on stainless-steel tubes using the washcoating method to catalyze the ammonia decomposition reaction and enhance chemical heat sink. The catalytic performance of these Ru/CeO2–Al2O3 coatings for ammonia decomposition was evaluated using an electrically heated tubular reactor. With the Ru/CeO2–Al2O3 coatings of 19 μm, ammonia conversion reaches up to 65%, and a remarkable high heat sink of 5.9 MJ/kg was achieved at 800 °C and 5 MPa. This value is ca. 68% higher than that of the typical hydrocarbon fuel JP-7. This work shows that liquid ammonia can serve as a novel generation high heat sink fuel for advanced engines and aircrafts.
研究领域:
航空航天工程
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 27
·9456-9464
·
IF 4
Xiu He,ZhenZhen Mo,Huiling Liu,Cheng Wang
The synthesis of furan-based platform chemicals from abundant and renewable biomass-based hexoses plays an important role in the development and utilization of biomass energy. The electrochemical 5-hydroxymethylfurfural oxidation reaction (HMFOR) represents a promising route for synthesizing the 2,5-furandicarboxylic acid (FDCA) product which is a high value-added biomass-based monomer. Interface engineering is an effective strategy to adjust the electronic structure, optimize the adsorption of intermediates, and expose more active sites, thus attracting extensive attention for designing efficient HMFOR electrocatalysts. Herein, a NiO/CeO2@NF heterostructure with an abundant interface is designed for boosting the HMFOR performance under alkaline conditions. At 1.475 V vs. RHE, the conversion of HMF is nearly 100%, the selectivity of FDCA is 99.0%, and the faradaic efficiency is as high as 98.96%. The NiO/CeO2@NF electrocatalyst also exhibits robust stability for HMFOR for 10 cycles. When coupled with the cathode hydrogen evolution reaction (HER) in alkaline medium, the yields of FDCA and hydrogen production are 197.92 and 600 μmol cm−2 h−1, respectively. The NiO/CeO2@NF catalyst is also suitable for the electrocatalytic oxidation of other biomass-derived platform compounds. The abundant interface between NiO and CeO2, which can regulate the electronic properties of Ce and Ni atoms, improve the oxidation state of Ni species, regulate intermediate adsorption, and promote electron/charge transfer, makes the most contribution to high HMFOR performance. This work will provide a simple route for the design of heterostructured materials and reveal the application prospect of interface engineering for promoting the upgrading of biomass derivatives.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiaxin He,Zhi-Hao Zhao,JinJin Li,Zhipeng Ren,Ruyi Jiang,Jichao Zhang,Jian Zhang
As pivotal high-performance elastomers, hydrogenated nitrile butadiene rubber (HNBR) was commonly manufactured by selective hydrogenation of nitrile butadiene rubber (NBR). Nevertheless, the high cost and poor stability of current noble metal-based catalysts seriously limit their large-scale applications. Herein, we report single-atom Pd supported by oxygen vacancies-rich CeO 2−x nanorods (Pd 1 /CeO 2−x ) as a novel catalyst for selectively hydrogenating the NBR. As a result of strong interaction between single-atom Pd and CeO 2−x support, the electrophilicity of Pd sites, and the nucleophilicity of olefinic bonds in NBR, the Pd 1 /CeO 2−x show a very high hydrogenated degree of 97.6 %, an unprecedentedly high Pd mass activity of 93.9 g NBR g Pd −1 h −1 , and outstanding cycling stability, which considerably outperform those for previously reported catalysts. Therefore, this work will promote the low-cost manufacture of HNBR and the exploration of single-atom catalysts for selective hydrogenation.
研究领域:
化学工程
·
材料科学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 19
·13912-13923
·
IF 2.993
Li Xin,Pu Zhilong,Zhou Hao,Zhang Wenchi,Niu Xiangheng,He Yanfang,Xu Xuechao,Qiu Fengxian,Pan Jianming,Ni Liang
In this work, we proposed a new hybrid of Pd nanoparticles dispersed on CeO 2 nanotubes (Pd NPs/CeO 2 NTs) with synergistically enhanced peroxidase-like activity for the visual detection of sulfhydryl compounds. In comparison with individual Pd NPs and CeO 2 NTs, the Pd NPs/CeO 2 NTs hybrid exhibited a synergy effect to trigger the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to its blue product TMBox mediated by H 2 O 2 . It was further demonstrated that the improved activity observed in Pd NPs/CeO 2 NTs originated from the strong interplays between Pd NPs and CeO 2 NTs, which could significantly increase the Ce 3+ /Ce 4+ ratio. Besides, sulfhydryl compounds were found to have the capacity to suppress the color reaction of TMB + H 2 O 2 catalyzed by the Pd NPs/CeO 2 NTs nanozyme at a low level. Based on this principle, mercaptoacetic acid in the concentration range of 66–400 nM could be linearly determined. Similarly, sulfhydryl-containing amino acid (cysteine) and its derivative (glutathione) in the linear scope of 6–40 nM were also detected, providing a detection limit down to 2.9 and 11.3 nM, respectively.
研究领域:
纳米材料
·
生物传感
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2022
·
IF 5.089
Guanling Yang,Aizhong Jia,Jingde Li,Fang Li,Yanji Wang
Hierarchically porous CeO 2 with excellent catalytic performance for direct dimethyl carbonate (DMC) from CO 2 and methanol was successfully prepared by a simple hydrothermal method due to the abundant oxygen vacancies (Ovs, ∼17%) and large surface area (137 m 2 ·g −1 ). The effects of template dosage as well as synthesis parameters including hydrothermal time and calcination temperature on the physicochemical properties of as-synthesized CeO 2 were studied, and the reaction conditions were investigated and optimized. The obtained results indicated that the Ovs varied with prolonging hydrothermal time and more Ovs were formed by etching due to longer crystal time. And the fabricated Ovs acting as acid sites and basic sites effectively activated CO 2 and methanol, respectively, which was further confirmed by the simulation results, however, the strong acid sites are detrimental to catalyst stability due to their strong chemical interactions with nicotinamide. And a high DMC yield of 260.12 mmol∙g −1 was obtained under the optimal reaction conditions: reaction time 5 h, initial CO 2 pressure 4.0 MPa, and reaction temperature 140 °C.
研究领域:
催化材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）