CHEMISTRY-A EUROPEAN JOURNAL
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2015
·Vol. 21
·期 43
·15439-15445
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IF 5.731
Yuan-Yuan Jiang,Hong-Bin Dai,Yu-Jie Zhong,De-Min Chen,Ping Wang
Graphical Highly active and robust : Ni–Pt alloy nanocatalysts supported on mesoporous ceria, prepared by a one-pot evaporation-induced self-assembly method, selectively promote decomposition of hydrazine monohydrate at a high rate to generate hydrogen with high selectivity (see figure). Moreover, the catalysts exhibit high cycle stability. The development of active, selective, and robust catalysts is a key issue in promoting the practical application of hydrazine monohydrate (N 2 H 4 ⋅ H 2 O) as a viable hydrogen carrier. Herein, the synthesis of a supported Ni–Pt bimetallic nanocatalyst on mesoporous ceria by a one-pot evaporation-induced self-assembly method is reported. The catalyst exhibits exceptionally high catalytic activity, 100 % selectivity, and satisfactory stability in promoting H 2 generation from an alkaline solution of N 2 H 4 ⋅ H 2 O at moderate temperatures. For example, the Ni 60 Pt 40 /CeO 2 catalyst enabled complete decomposition of N 2 H 4 ⋅ H 2 O to generate H 2 at a rate of 293 h −1 at 30 °C in the presence of 2 M NaOH, which compares favorably with the reported N 2 H 4 ⋅ H 2 O decomposition catalysts. Phase/structural analysis by XRD, TEM, and Auger electron spectroscopy was conducted to gain insight into the excellent catalytic performance of the Ni–Pt/CeO 2 catalyst.
研究领域:
材料科学
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化学工程
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能源存储与转换
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DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
·
IF 7.3
Peng Xu,Tianguan Wang,Jingsha Tan,Wenfeng Ge,Huixuan Qian,Yanwei Zeng,Bing Lei,Honglei Guo,Zhiyuan Feng,Guozhe Meng
In this work, a new type of hollow mesoporous CeO 2 microsphere (HMCM), synthesized through a template-free approach, was utilized as both an inhibitor and a nanocontainer for loading the corrosion inhibitor benzotriazole (BTA). These microspheres were encapsulated with a co -deposition layer composed of polydopamine (PDA) and polyethyleneimine (PEI) to construct smart containers (PDA-PEI@HMCM-BTA) with pH-responsive release properties. The corrosion inhibition effect of PDA-PEI@HMCM-BTA nanocontainers was assessed and the release rate of BTA and Ce ions from the nanocontainers was greatly accelerated in the presence of acidic solutions. Electrochemical impedance spectroscopy (EIS) was conducted to evaluate the barrier properties and active anti-corrosion performance of the coatings. The results showed that the integration of nanocontainers within the waterborne epoxy coating significantly improved the corrosion resistance and self-healing capabilities, thereby providing efficient corrosion protection for carbon steels. The method offered a simplified synthesis route for Ce-based nanocontainers and presented a strategy for producing waterborne epoxy coatings with active anticorrosive properties.
研究领域:
材料科学
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腐蚀与防护
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纳米技术
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DOI
高影响因子
Reaction Chemistry & Engineering
·
2023
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IF 3.9
Cheng Zhang,Yi Zheng,Jianfeng Li,Hongzhang Cao,Yanhui Xu,Weisheng Liu,Zhengping Dong
Selective hydrogenation of alkynol compounds to produce high value-added enols is an important reaction in the fine chemical industry. The construction of selective hydrogenation catalysts for alkynols is challenging because the alkynyl group is prone to over hydrogenation and the selectivity in the hydrogenation is always low. Herein, a simple sacrificial template strategy was designed to prepare mesoporous CeO2, on which ultrafine and highly-dispersed bimetallic PdCu nanoparticles were anchored, obtaining the PdCu@CeO2 catalyst. Introducing non-precious metallic Cu can improve the selectivity of precious metal Pd catalysts for the selective hydrogenation of alkynols through electronic and geometric modulation. The obtained PdCu@CeO2 catalyst showed high selectivity (99%) and good recyclability for the selective hydrogenation of the probe compound propynol ethoxylate under mild conditions. The PdCu@CeO2 catalyst also exhibited excellent performance in the catalytic selective hydrogenation of various substituted alkynols. Therefore, this research work provides a feasible strategy for the effective regulation of catalytic performance, which has potential application for the efficient catalytic selective hydrogenation of alkynols in the fine chemical industry.
研究领域:
催化化学
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材料科学
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精细化工
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DOI
高影响因子
RSC Advances
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2019
·Vol. 9
·期 39
·22366-22375
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IF 3.049
Yaohui Xu,Ruixing Li,Yang Zhou
An eco-friendly route was developed for the synthesis of mesoporous CeO2 powders without any additional template. The original cerium precursors were separated from Ce3+ aqueous solution by (NH4)2CO3 or Na2CO3 via a chemical precipitation method, then H2O2 was introduced to induce the phase transformation from original cerium precursors to CeO2 precursors with initial porous structures, finally the crystallinities of CeO2 precursors were improved by a hydrothermal treatment, meanwhile the mesoporous structures of final CeO2 powders were formed. The BET surface areas of mesoporous CeO2 powders synthesized using (NH4)2CO3 and Na2CO3 as precipitants were 106.1 and 76.9 m2 g−1, respectively. Moreover, a mesoporous CeO2 sample with BET surface area of 100.0 m2 g−1 was also synthesized using commercial Ce2(CO3)3·xH2O as an existing cerium precursor under the same conditions as control, which could shorten experimental processes and reduce costs. The oxidation-induced phase transformation from original cerium precursors to CeO2 precursors with initial porous structures was the precondition for further forming of mesoporous structures of final CeO2 powders during the hydrothermal process. These mesoporous CeO2 powders showed the rapid and effective adsorption for acid orange 7 dye from simulated wastewater without pH pre-adjustment at room temperature. Furthermore, the adsorption capacities of these mesoporous CeO2 powders for removal of acid orange 7 dye were determined according to the Langmuir linear fits.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
MEASUREMENT SCIENCE and TECHNOLOGY
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2025
·Vol. 36
·期 8
·085104
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IF 3.4
Chengcheng Wan,Zhaoru Ban,Dan Zhang,Jiumei He,Yanju Chen,Shan Tang,Qianchun Zhang
Methyl sec-butyl ether (MSBE), a volatile organic compound, poses significant risks to both environmental safety and human health. Consequently, developing efficient sensors for the rapid and accurate detection of trace levels of MSBE is essential. In this study, we synthesized mesoporous CeO2 nanoparticles using carbon quantum dots as templates, resulting in the development of a highly sensitive cataluminescence sensor system. This sensor demonstrated an impressive linear detection range of 0.50–20 mg l−1 (R2 = 0.998) and a low detection limit of 0.08 mg l−1, coupled with a signal-to-noise ratio (S/N) of 3. We applied the mesoporous CeO2 nanoparticle sensor to measure MSBE levels in various environments, including a volatile medicine reagent freezer, laboratory gas, and a storage cabinet, which yielded concentrations of 2.07, 1.38, and 3.96 mg l−1, respectively. The sensor also exhibited excellent recovery rates, ranging from 91.1% to 110%, with relative standard deviations (RSD, n = 5) from 3.4% to 8.7%, indicating reliable performance. Additionally, gas chromatography-mass spectrometry was employed to elucidate the mechanism underlying the developed cataluminescence sensor. This study introduces a versatile approach for designing gas sensors for MSBE that not only exhibits high sensitivity and selectivity but also significantly enhances their potential applications in both industrial and environmental monitoring.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 31
·期 22
·20495-20512
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IF 2.22
Jiang Haopeng,Li Xin,Chen Songtao,Wang Huiqin,Huo Pengwei
g-C 3 N 4 quantum dots (CN QDs)-decorated mesoporous CeO 2 composite photocatalyst was prepared by hydrothermal method. The characterized results exhibit that the CN QDs are successfully coupled with mesoporous CeO 2 , and the photoelectronic response is effectively enhanced. The photocatalytic activity was tested by CO 2 reduction, and the results showed that when the loading of CN QDs was 0.75 wt%, the composite photocatalyst has the best photocatalytic activity. After 10 h of UV irradiation, the yields of CO and CH 4 were 22.48 µmol/g and 15.81 µmol/g, respectively. Some of the electrons generated within m-CeO 2 participated in the CO 2 reduction reaction and some were transferred to CN QDs through the two-phase interface to participate in the CO 2 catalytic reaction. The oxygen vacancies in m-CeO 2 can adsorb CO 2 and the introduced CN QDs can excite more oxygen vacancies with m-CeO 2 heterostructure, thereby adsorbing more CO 2 and photoreduction electrons.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）