ChemCatChem
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2018
·Vol. 10
·期 20
·4689-4698
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IF 4.674
Yan Liu,Ye Wu,Zarina Akhtamberdinova,Xiaoping Chen,Guodong Jiang,Dong Liu
Graphical High fives ! The catalyst 5Ni-5Ce exhibits the best catalytic performance in the dry reforming of shale gas and CO 2 . The introduction of Ce creates strong interaction between Ni and Ce, which enhances the electron transfer between them. And the substitution of Ni for Ce produces oxygen vacancies and defects, which can accelerate the adsorption and activation of the reactant gases molecule, further promoting the reaction. The dry reforming of shale gas (methane and ethane with an average ratio of 4 : 1) with carbon dioxide (DRS) is considered to be a promising way to produce syngas, which widens the utilization of shale gas and mitigates carbon dioxide emission. In this paper, Ce modified Ni-based catalysts were developed and the corresponding catalytic performances for DRS were investigated with a fixed bed reactor. Results showed that the catalyst containing 5 wt% of Ni and 5 wt% of Ce performed a best catalytic effect, including the selectivity of syngas and the carbon resistance performance, which is due to the good metal dispersion, strong interaction between Ni and Ce, and the formation of Ni-CeO x solid solution. The electron transfer between Ni and Ce, substitution of Ni for Ce, and the sequential oxygen vacancies or defects, play significant roles in activating CH 4 , C 2 H 6 and CO 2 . The conversion of reactant gas increased with temperature, while the selectivity of syngas is little affected with temperature. In addition, the desired catalyst containing 5 wt% of Ni and 5 wt% of Ce showed good stability in the long-time operation, which indicates that the Ce modified Ni-based catalyst is a promising one for the dry reforming of shale gas.
研究领域:
化学工程
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催化
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能源转化
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环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Jian Chen,Zhen Hu,Yang Ou,Qinghua Zhang,Xiaopeng Qi,Lin Gu,Tongxiang Liang
Development of a low-cost and durable bifunctional electrocatalyst with high catalytic activity by hybridizing rare earth metal and non-noble metal is of utmost significance. Herein, a bifunctional electrocatalyst consisting of MoO 2 and CeO x heterostructure is synthesized via interfacial engineering. Particularly, due to its unique hetero-interface with abundant oxygen vacancies, the MoO 2 -CeO x /NF is able to exhibit outstanding hydrogen evolution reaction (HER) performance with an overpotential of 26 mV at 10 mA cm −2 , and a preferable oxygen evolution reaction (OER) overpotential of 272 mV at 100 mA cm −2 in 1 M KOH. The recorded HER and OER overpotentials of MoO 2 -CeO x /NF are clearly smaller than those of Pt/C (HER overpotential of 27 mV) and RuO 2 (OER overpotential of 393 mV) at the same current density. More importantly, MoO 2 -CeO x /NF can also exhibit good HER activity with an overpotential of 50 mV at 10 mA cm −2 in acidic media. Thus, it is expected that this work can offer a new approach in the realization of high-catalytic alkaline overall water splitting and acidic HER performance through the rational design of rare-earth metal and non-noble metal heterostructure.
研究领域:
材料科学
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电化学
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催化
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能源材料
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Hong Liang,Qiang Zheng,Kaibin Zhang,Youli Yang,Ran He
Mesoporous 10CeO x /MnO x -Y catalysts were successfully prepared by doping Ce and calcining Mn-BTC (BTC = 1,3,5-benzenetricarboxylate) for ozone catalytic decomposition. The 10CeO x /MnO x -300 catalyst exhibited the highest catalytic activity under the relative humidity (RH) range from less than 5–65 %, giving 100 % conversion of 40 ppm O 3 after 6 h. Series of physicochemical characterizations including XRD, TG, SEM, HR-TEM, ICP-OES, BET, XPS and H 2 -TPR were introduced the relationship of calcination temperature, catalysts structure and ozone catalytic performance. The results demonstrated that the 10CeO x /MnO x -300 catalyst had the highest Mn 3+ /Mn 4+ and O ads /O latt ratios and the largest specific surface compared with those of other samples, which are crucial to decompose ozone. In addition, better dispersion of crystals, larger pore volume, more oxygen vacancies, and better low-temperature reducibility are also conducive to ozone decomposition. This research establishes the basis for the application of manganese-based MOFs for ozone decomposition.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2026
·
IF 6
Yanshuang Xiong,Zhiwei Jian,Ian Jimmy Madatta,Yang Liu,Jinrui Ding
Electroreduction of carbon dioxide (CO2) to produce multicarbon products (C2+) holds immense potential for reducing carbon emissions and realizing high-valued CO2 utilization. However, the development of efficient catalysts still remains challenging. Cuprous oxide (Cu2O) has been identified as a promising candidate, yet its C2+ selectivity and stability require further improvement. In this study, we, for the first time, blended Cu2O with cerium oxide (CeOx) nanoparticles, forming a Cu2O/CeOx hybrid catalyst which greatly enhanced the selectivity and durability for C2+ production. The optimized catalyst achieved a remarkable carbon product Faradaic efficiency (FE) of 79.6% and a C2+ product FE of 58% (±2.4%) in an H-type electrolytic cell. Our findings provide a novel strategy for significantly improving the selectivity, efficiency, and catalyst stability of CO2 electroreduction.
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DOI
高影响因子
ChemCatChem
·
2026
·Vol. 18
·期 15
·e70966
·
IF 4.1
Fengyuan Chen,Yuwen Liu,Guoli Fan,Jianyun Bao,Minghao Zhao,Feng Li
In methanol-to-olefins (MTO) reactions, extending the catalyst lifetime remains a critical challenge for industrial applications. Herein, we develop a synergistic synthetic strategy integrating a micro-liquid film (MLF) reactor, crystal seed assistance, and ligand protection to efficiently incorporate cerium species into SSZ-13 zeolite, thereby yielding highly dispersed CeO x nanocluster-modified SSZ-13 zeolites (Ce-SSZ-13). The CeO x loading effectively modulated the acid properties by weakening Brønsted acid strength while generating additional weak Lewis acid sites. The Ce-SSZ-13 zeolite featuring a 1 wt% Ce loading showed excellent catalytic performance at a weight hourly space velocity of 1 h −1 and 400°C, with a long catalyst lifetime of 10.4 h and a 91.3% selectivity of light olefins. Notably, the catalyst lifetime was enhanced by 41.1% compared with the unmodified SSZ-13 zeolite, accompanied by a significantly reduced coke formation rate of 0.081 mg·min −1 . It was revealed that the appropriate acidity of Ce-SSZ-13 zeolites efficiently suppressed hydrogen transfer and aromatization processes in MTO reactions and stabilized key hydrocarbon pool intermediates, thereby shifting the reaction pathway toward the olefin cycle. These findings provide an effective strategy for rationally designing high-performance SSZ-13 catalysts for MTO reactions and highlight the critical role of acid modulation of SSZ-13 zeolites. Graphical Highly dispersed CeO x nanoclusters-modified SSZ-13 zeolites with tailored surface acidity were synthesized through a synergistic strategy of crystal seed assistance, ligand protection, and micro-liquid film reactor-enhanced mixing. As-synthesized modified SSZ-13 zeolites could suppress coke deposition and substantially prolonging the catalyst lifetime in the methanol-to-olefins reaction.
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Weijia Pu,Zhihui Li,Binxiong Guang,Yahui Xiao,Yong Liu
In this study, an ordered mesoporous carbon (OMC) was synthesized by coordination induced self-assembly, in which the tannin was used as carbon precursor, Cu 2 + and Ce 3+ cations were as both crosslinking agents and catalyst precursors. The results indicated that the Cu 0 , Cu + and oxygen vacancies were in-situ formed by self-reduction of the nascent CO gas during carbonization, and well-dispersed within the OMC substrate. Moreover, the resulting Cu + species and oxygen vacancies were firmly stabilized in the Cu-CeO x interfaces induced by the strong electronic interaction between Cu 0 and CeO 2 . Simultaneously, the OMC substrate created abundant ordered mesoporous structure to disperse and confine the Cu-CeO x species. The balanced Cu 0 and Cu + species in the Cu-CeO x @OMC catalysts synergistically boosted the hydrogenation of cyclohexyl acetate. Benefited from those, the Cu-CeO x @OMC-550–3 catalyst exhibited the excellent activity and stability for hydrogenation of cyclohexyl acetate into cyclohexanol even without reduction by hydrogen. Specifically, under the optimal reaction conditions of 250 °C, 4 h, 4 MPa H 2 and 50 mg catalyst dosage, the cyclohexyl acetate conversion and selectivities of cyclohexanol and ethanol achieved 95.9 %, 96.6 % and 98.4 %, respectively. Moreover, the catalyst showed no significant changes in structure and activity after five reusing times, delivering robust stability and reusability.
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DOI
高影响因子
ACS Catalysis
·
2024
·
IF 11.3
Xue Yang,Lu Sun,Xingyu Liu,Zekai Yang,Han Sun,Weiwei Liu,Haijun Chen
The vacancy-engineering strategy has been successfully employed for electrochemical conversion by modulating the electronic structure and reaction kinetics of metal oxide-based electrode materials. The electrolysis of ammonia into hydrogen and nitrogen under mild conditions would be beneficial for utilizing ammonia as a zero-carbon fuel for mobile applications, such as cars and ships. Although platinum has been studied as the most effective state-of-the-art electrocatalyst for ammonia electrolysis, its high cost and rapid deactivation due to nitride poisoning make it difficult to be used commercially. Herein, we report that nanosized cerium oxides (CeOx) demonstrate highly efficient activity and enhanced stability for ammonia electrolysis in a nonaqueous electrolyte system. The Faradaic efficiency of N2 is approximately double that of a commercial Pt/C electrode, while its onset potential is lower than that of the latter. Cerium oxide with vacancy sites was found to be more favorable for NH3 adsorption and exhibits a significantly lower energy barrier for the initial step of NH3 dissociation compared to CeO2. Consequently, this contributes to the heightened activity of ammonia electrolysis on the electrode of cerium oxide following the G–M mechanism.
研究领域:
材料科学
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电化学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 27
·9254-9260
·
IF 4
Mingqi Sun,Shuai Zhang,Yaru Li,Chen Yang,Ying Guo,Lan Yang,Sailong Xu
Rational construction of low-cost and high-performance electrocatalysts for water splitting is crucial for the advancement of renewable hydrogen fuel. Hybridizing heterojunctions or noble metals is one typical strategy used to boost the electrocatalytic performance for either the oxygen evolution reaction (OER) or hydrogen evolution reaction (HER). Here, low-content CeOx (3.74 wt%) is introduced into Ni3Fe nanoparticle-encapsulated carbon nanotubes (Ni3Fe@CNTs/CeOx), with both the OER and HER activities boosted, as a bifunctional electrocatalyst for overall water splitting. The composite is derived by pyrolyzing a mixture of melamine/ternary NiFeCe-layered double hydroxide. The composite electrocatalyst requires low overpotentials of 195 and 125 mV at 10 mA cm−2 in 1.0 M KOH, respectively, which are superior to those of Ni3Fe@CNTs/NF (313 and 139 mV) and CeOx/NF (345 and 129 mV), and in particular, OER overpotentials of 320 and 370 mV at 50 and 100 mA cm−2, respectively. Moreover, the composite-assembled electrolyzer for overall water splitting requires a current density of 10 mA cm−2 at a decent cell voltage of 1.641 V. Furthermore, the enhancement is elucidated by the synergistic effect: the dual role of CeOx in boosting the OER and HER, the highly conductive carbonaceous CNTs, large electrochemically active surface area and low charge-transfer resistance. The results can offer an effective route for designing and preparing low-cost and high-efficiency electrocatalysts for electrocatalytic water splitting.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.2
Rong Wang,Xinyi Yuan,Qingxiang Ma,Yan Wang,Jucang Ke,Xiaopeng Li,Xinhua Gao,Jian Sun,Tian-sheng Zhao
The oxidative dehydrogenation of propane with CO2 (CO2-ODHP) technology is recognized as a promising new route for propylene production, owing to its advantages in energy saving, high yield, and environmental friendliness. However, the inherent complexity of the reaction system and catalyst structures has led to ongoing debates regarding its activation mechanisms and reaction pathways. Thus, the development of high-performance catalysts capable of synergistic activation of propane and CO2 with simultaneous high propylene selectivity continues to be a key objective and challenge. This study aimed to investigate the catalytic activity of Pt-based catalysts supported on CeOx nanoclusters for the CO2-ODHP reaction, from the perspective of enhancing CO2 adsorption and activation. Experimental results demonstrate that the oxygen-rich defect structure on the CeOx nanoclusters significantly promotes the activation and dissociation of CO2. Furthermore, the incorporation of Sn effectively enhances the dispersion of Pt species and their surface electron density, thereby further strengthening the strong adsorption and activation of propane while simultaneously facilitating the desorption of propylene. Following continuous operation for 5 h at 550 °C, the 0.5Pt2.0Sn/CeOx-SiO2 catalyst demonstrated superior catalytic performance, achieving a propane conversion of 45.3% and a propylene selectivity of 93.6%. Based on in situ DRIFTS analysis, a possible reaction mechanism for CO2-ODHP on this catalyst is proposed. The findings of this study provide crucial theoretical guidance and practical references to further advance high-performance Pt-based catalysts for CO2-ODHP reactions.
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DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Jiaxin Mu,Shangyi Li,Jing Wang,Xukai Li,Weirui Chen,Xinyuan Tong,Yiming Tang,Laisheng Li
Herein, we demonstrated the construction of three-dimensional (3D) cerium oxide (CeO x )/SBA-16 nanocomposites for efficient removal of bisphenol A (BPA) via a catalytic ozonation , with a high BPA mineralization up to 60.9% in 90 min. On one hand, the CeO x /SBA-16 mesoporous structured materials presented large surface area and uniform pore distribution, which was conducive to the adsorption of transformation by-products (TBPs) and then, the mass transfer. On the other hand, CeO x /SBA-16 could enhance the ozone utilization efficiency and meanwhile facilitate the formation of OH, the main reactive oxygen species . Through the exploration of dissoluble organic matters and the identification of the reaction intermediates, two BPA degradation pathways were proposed. This approach reported here will benefit the design and construction of mesoporous structured materials for catalytic elimination of hazards to remediate the environment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2022
·
IF 8.129
Hao Qin,Nengjie Feng,Quan Lv,Hui Wan,Guofeng Guan
Single atomic catalysts (SAC) isolated in zeolite have been reported for hydroisomerization of n-alkanes. However, it is widely found that metal species located outside zeolite crystals have beneficial effects on catalytic performance, rather than inside zeolite. Herein, we introduce cerium oxide as a binder to anchor Pt single atoms on the catalyst surface . Pt species were atomically dispersed on catalyst surface certified by AC HAADF-STEM and XAS. Pt 1 @CeO x /SAPO-11 not only shows significant activity but also effectively inhibits the selectivity of cracking or hydrogenolysis . The turnover frequency value of 0.05%Pt 1 @CeO x/ SAPO-11 reaches 9511 h −1 , 13 times higher than reported catalyst prepared with the space-confined strategy. Reaction mechanisms have been proposed to explain the different effects of platinum status and location on the reaction. Platinum single atoms located outside the catalyst crystal are speculated more favourable to this reaction. Conceptually, catalytic efficiency of this reaction can be improved by dispersing the active sites to reduce the local concentration of the product of a reversible step in an intermediate reaction. An appropriate loading of 0.05 wt% is needed to achieve the high efficiency of the metal and acid sites simultaneously.
研究领域:
催化
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Tingman Zhao,Bo Feng,Jiada Du,Shengdao Shan,Yun Shi
Low-temperature NH 3 -SCR of NO x technology was recognized as a promising way to control NO x emissions from industrial kilns at low temperatures. Except for SO 2 and H 2 O, lots of CO 2 exist in the flue gas of industrial kilns. However, there are few researches on the effects of CO 2 on the low-temperature NH 3 -SCR activity. To investigate the effects of CO 2 on the low-temperature NH 3 -SCR performance and mechanism of CeO x -biochar catalyst, a series of experiments employed. The results showed that the presence of CO 2 had an obvious inhibitory effect on the NH 3 -SCR performance of CeO x -biochar 0.6 at 150 °C. There was competitive adsorption between CO 2 and NO on the surface of CeO x -biochar 0.6 . CO 2 was mainly adsorbed on CeO 2 , which hindered the oxidation of NO and the adsorption of NO x on the catalyst surface. Meanwhile, although the presence of CO 2 could improve NH 3 adsorption capacity of CeO x -biochar 0.6 due to the formation of NH 4 HCO 3 and (NH 4 ) 2 CO 3 , the existence of carbonates and bicarbonates blocked the formation of active intermediates NH 4 NO 2 and NH 2 NO for NH 3 -SCR reaction. As a result, the NO x conversion of CeO x -biochar 0.6 was dropped from 96.9% to 40.8% at 200 °C. In view of the bicarbonate and carbonate species was unstable at high temperatures, the inhibitory effect of CO 2 on NH 3 -SCR reaction was gradually weakened with the increase of reaction temperature. The NH 3 -SCR activity of CeO x -biochar 0.6 was seldom affected by CO 2 at 300 °C. Finally, a CO 2 poisoning mechanism for NO x removal by NH 3 -SCR at low temperature was proposed.
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高影响因子
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