JOURNAL OF RARE EARTHS
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2024
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IF 5.2
Hao Qin,Hui Wan,Guofeng Guan
Hydroisomerization of n-alkanes plays an important role in fuel and lubricants processing. Bifunctional catalysts with ultralow platinum loading have recently been reported successively for hydroisomerisation. Herein, the catalysts were prepared successfully with different methods to improve the catalytic performance. The conversion of 0.01%Pt1@CeOx/SAPO-11 prepared by co-calcination method (0.01%Pt1@CS-c) is 71.4%, 25% higher than the other prepared by precipitation method. The turnover frequency per active surface platinum site (TOFPt) of 0.01%Pt1@CS-c is as high as 13115 h –1 . Revealed by the X-ray photoelectron spectroscopy (XPS) results, the quality of phase boundary/intersurface between ceria and zeolite is found significantly different. The conjunction quality of phase boundary directly affects the spillover rate of intermediate species, which further leads to an apparent activity difference. In addition, the possible role of ceria in the reaction is discussed, rather than just as a carrier for the active metal atoms.
研究领域:
催化化学
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能源材料科学
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DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Xiaoying Luo,Songjiao Zhao,Tao Wang,Xin He,Mingxuan Yang,Jie Tao,Shenmin Zhu,Hui Zhao
Consistent corneal epithelial injury would cause chronic inflammation, neovascularization, and even corneal scarring, resulting in vision loss. Rapid repair is crucial for treatment, within which the use of therapeutic contact lenses presents great promise. A great challenge is how to achieve rapid repair of severely deficient corneal epithelium and regulation of the oxidative stress environment simultaneously. Herein, a “bioactive” therapeutic contact lens, mimicking the layered helical structure of the native cornea, is designed based on the assembly of cellulose nanocrystals (CNCs) inside poly(hydroxyethyl methacrylate) (PHEMA) with CeOx formed on the CNCs’ surface (CeOx/CNC@CNC-PHEMA). The obtained CeOx/CNC@CNC-PHEMA hydrogel possesses a chiral helical structure that regulates the microenvironment, and the nanoscaled CeOx on the CNCs’ surface (CeOx/CNC) acts as a reactive oxygen species (ROS) scavenger and triggers a “bioactive” therapeutic contact lens for rapid corneal repair. This hydrogel meets the conditions of a therapeutic contact lens, including high degree of transparency, excellent mechanical properties, great ROS-scavenging efficacy, and a significant enhancement of biocompatibility. Importantly, the adhesion and proliferation of human corneal epithelial cells on the CeOx/CNC@CNC-PHEMA hydrogels are successful. An in vitro corneal oxidative damage model and in vivo animal model of corneal injury experiments were conducted, and results revealed that the hydrogel realized rapid corneal epithelial cells migration with antioxidant, anti-inflammatory, and antineovascular effects, achieving modulation of the ocular surface microenvironment, evidencing a “bioactive” property of the hydrogel as a therapeutic contact lens. This biotopological hydrogel with a biomimetic corneal architecture has provided a rational strategy for rapid corneal repair.
研究领域:
生物医学工程
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眼科
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材料科学
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 51
·期 2
·675-684
·
IF 4.39
Huimin Wang,Huixiang Liu,Tao Feng,Lincai Wang,Wenyi Yuan,Qing Huang,Yanhui Guo
Exploiting economic, efficient and durable non-noble metal electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is promising, but still faces enormous challenges. Herein, the strategy of doping a metal boride with a rare earth metal oxide has been explored to develop a highly efficient bifunctional electrocatalyst. The novel electrocatalyst CeOx-NiB consists of CeOx-doped NiB supported on nickel foam, and was fabricated by a one-step mild electroless plating reaction. Remarkably, the CeOx-NiB@NF electrode delivers a current density of 10 mA cm−2 at overpotentials of only 19 mV and 274 mV for the HER and OER, respectively. Two-electrode electrolyzers with the CeOx-NiB@NF electrode require only 1.424 V to deliver 10 mA cm−2 for overall water splitting in 1.0 M KOH, outperforming the Pt–C/NF∥IrO2/NF electrolyzer. Meanwhile, the electrode also has good stability (can work for 100 hours at 10 mA cm−2) and industrial-grade current density. This work provides a new idea for the development of efficient and durable non-precious metal catalysts.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Longxiang Xia,Jing Shen,Dengfeng Wu
Herein, Al 2 O 3 supported ultra-small Mn-CeOx nanoparticles (Mn-CeOx/Al 2 O 3 ) are prepared by a facile impregnation method for removal of phenolic compounds via catalytic ozonation . Mn and Ce species are in the form of polyvalent oxide nanoparticles with an average size of 0.9 nm. The removal efficiency of total organic carbon for phenol-containing model wastewater by Mn-CeOx/Al 2 O 3 shows a volcano relationship by changing the mass ratio of Mn and Ce, and reaches up to the peak value when the mass ratio is 5:5. The cycle stability tests suggest the removal efficiency of Mn-CeOx/Al 2 O 3 could maintain at 90.16 % after 5 circles. The enhanced performance should be attributed to the optimized magnetism and accelerated charge transfer by composition regulation. The magnetic strength changing affects the adsorption mode of O 3 , while the redox cycle of Mn(IV)/Mn(III) and Ce(IV)/Ce(III) could enhance the activation of O 3 to produce more ·OH and 1 O 2 for the organic molecules mineralization.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2023
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IF 5.7
Yun Shi,Tingman Zhao,Jiada Du,Bo Feng,Qiuqi Tang,Shengdao Shan,Min Zhang,Qun Wang,Jingkai Zhao
A highly efficient CeO x -BC 0.6 (BC: biochar. 0.6: mass ratio of Ce/(BC + Ce)) catalyst was prepared by air oxidation for low temperature NH 3 selective catalytic reduction of NO x . The catalytic performance, characterization and reaction mechanism of the CeO x -BC 0.6 were investigated. The results showed that NO x conversion and N 2 selectivity of CeO x -BC 0.6 catalyst obtained by calcining in air were above 90 % at 150–300 °C and 100,000 h −1 . The surface oxygen groups, acid sites and oxygen vacancies were generated by air oxidation treatment, which promoted the adsorption and activation of reactants. NH 3 and NO x were adsorbed on the catalyst surface in the form of NH 4 + , NH 3 + , nitrite and nitrate adspecies. The redox cycles of ketonic carbonyl/phenol (C O/C–OH) pairs and Ce 4+ /Ce 3+ pairs were responsible for the activation of NH 3 and NO x . NH 2 NO and NH 4 NO 2 were the main active intermediates. The reaction of NH 3 selective catalytic reduction of NO x over CeO x -BC 0.6 mainly followed Eley-Rideal mechanism. These results will promote the understanding of mechanism of NH 3 selective catalytic reduction of NO x for biochar-based catalyst prepared by air oxidation.
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
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IF 3.8
Shiqiang Wang,Dan Guo,Meng Han,Yitong Yao,Pengfei Zhang,Xuening Zhang,Jing Lv,Yong Wang,Shengping Wang,Xinbin Ma
Syngas, an extremely meaningful chemical feedstock consisting of hydrogen and carbon monoxide, can be produced through methane dry reforming with carbon dioxide. The extensively utilized Ni-based catalysts usually suffer from coke-induced instability. Herein, we design Ni-CeOx bifunctional catalysts with different proximity and explore the influence of proximity level on anticoking performance. Ni-CeOx bimetallic nanoparticles with intimate contact are precisely regulated through the anchoring strategy of coordination unsaturated Al3+penta, which undergoes the topotactic exsolution of a Ni–Ce–O quasi-solid solution into Ni-CeOx bimetallic nanoparticles. A trend toward easier elimination and even the absence of graphitic carbon is observed with a decreasing spatial distance between Ni and CeOx, which is attributed to the proximity between the dissociation and gasification sites of CHx* intermediates. CHx* species generated at Ni nanoparticles migrated to adjacent CeOx oxygen carriers for Ni-CeOx/Al2O3 catalyst gasification with Ni-CeOx bimetallic nanoparticle interfaces, which undergo the Mars–van Krevelen (MvK) mechanism. The exploration of the Ni-CeOx proximity provides guidance for developing efficient and durable Ni-based DRM catalysts.
研究领域:
催化化学
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材料科学
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能源化学
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产品关联
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Fei Fan,Dechao Wang,Zengyi Li,Wulong Lu,Jianwei Liu,Xiaoyi Wei,Xu Cheng,Houxiang Sun,Huabing Zhang,Zhiping Chen,Wenwu Zhou
Developing high-performance supported non-precious metal copper-base catalysts for CO 2 hydrogenation is of extreme significance for the successful production of green methanol (CH 3 OH). Herein, Cu/ n Ge-CeO x catalysts ( n = 0, 0.25, 0.5, and 1 wt%) were synthesized via the incipient wetness impregnation method and comprehensively investigated using experiments and DFT calculations. Among all the catalysts, the Cu/0.5Ge-CeO x catalyst exhibited the highest concentration of oxygen vacancies, the smallest Cu grain size, and the most favorable regions for CO 2 adsorption. Compared to the Cu/0Ge-CeO x catalyst, the CH 3 OH yield was significantly improved over the Cu/0.5Ge-CeO x catalyst in the temperature range of 220–260°C under 3 MPa and a gas hourly space velocity of 3000 mL·g cat −1 ·h −1 . Especially at 260°C, the yield sharply increased from 35.23% to 82.21%, and this catalyst maintained high activity for 100 h. This was because the inert pair effect of the introduced Ge promoters induced lattice distortion on the support surface and regulated its microregion electron structures, while simultaneously establishing a highly active interface on the adjacent Cu cluster. This not only enabled an integrated process of in situ activated CO 2 and hydrogenation, but also inhibited the HCOO pathway, lowered the barrier of the rate-controlling step of the RWGS pathway, and reconciled some of its competing branching routes.
研究领域:
催化
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材料科学
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环境化学
·
化学工程
·
计算化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Xia Kong,Mengran Lou,Shengjiao Wen,Yang Wang,Taotao Lv,Bo Ma,Mei Wu,Xiaomei Wang,Alex Trukhanov,Zhipeng Sun,Ruiying Wang
Coal-based carbon fibers (C-CFs) achieve the high value-added utilization of coal. • The Co/Co 2 N 0.67 /CeO x /C-PCFs catalyst is prepared by electrospinning and pyrolysis. • Pore creation in C-CFs enhances the synergy between cerium oxide and cobalt nitride. • The Co/Co 2 N 0.67 /CeO x /C-PCFs catalyst shows outstanding performance for OWS. Developing exceptional and economically viable electrocatalysts is crucial for advancing overall water splitting (OWS). Herein, a self-supporting electrode of Co/Co 2 N 0.67 /CeO x /coal-based porous carbon fibers (Co/Co 2 N 0.67 /CeO x /C-PCFs) is synthesized via electrospinning, hydrothermal reaction, and pyrolysis. The pore-creating strategy applied to coal-based carbon fibers (C-CFs) enhances the internal and external synergy between cerium oxide and cobalt nitride, and effectively modulates the electronic structure, promoting both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), thereby improving OWS performance. Moreover, by using acid- and alkali-tolerant C-PCFs as a support, the prepared electrode has a self-supporting structure, enabling it to undergo HER in both acidic and alkaline electrolyte solutions. The resulting Co/Co 2 N 0.67 /CeO x /C-PCFs electrode exhibits prominent electrocatalytic performance, with a low overpotential of 73 mV for HER in acidic media at 10 mA cm −2 , and in alkaline media, requiring only 93 mV for HER, 193 mV for OER, and a low cell voltage of 1.52 V for OWS at 10 mA cm −2 , with excellent stability over 240 h. In-situ Raman spectroscopy reveals that CeO x facilitates the reconstruction of cobalt species into CoOOH, thereby boosting OER activity. This study offers a reliable strategy for oxide/nitride composite catalysts and a new route converting coal to value-added carbon fibers. Download: Download high-res image (197KB) Download: Download full-size image
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jinxin Li,Dan Zhong,Zhaoyu Wu,Yiru Chen,Kefei Li,Qinghui Du,Wencheng Ma,Zhaopeng Li,Jingna Zhang,Jun Ma
Double oxygen vacancies (V O ) tuned core–shell La V CuO δ @CeO x (V O -LCO@CeO x ) nanoreactors with direct electron transfer (DET) structure was synthesized as an effective heterogeneous Fenton-like catalyst for the quinoline removal. The DET structure was constructed by electron-rich ≡Cu center of V O -LCO core and electron-capture center of CeO x shell for electrons supplying and consuming. This structure elevated total V O levels of catalyst through the removal of oxygen atoms in CeO 2 from attice to interface sites. Meanwhile, the ≡Ce(III) acted as reactive sites for the adsorption of hydrogen peroxide (H 2 O 2 ) to form surface peroxide species, and then the electron-rich ≡Cu center was further provided electrons to surface peroxide species by DET to produce hydroxyl radical. Moreover, the newly formed surface V O would also be further promote hydroxyl radical production through self-activation of H 2 O 2 . This catalyst displayed excellent catalytic activity and stability. The density functional theory (DFT) results further pointed out that this structure had excellent adsorption energy, and generable electron transfer from V O -LCO to CeO x . This work provided a novel approach for the development of heterogeneous Fenton-like catalysts to degrade quinoline wastewater.
研究领域:
环境科学
·
材料科学
·
催化化学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Junyong He,Ya Yang,Peidong Hong,Yulian Li,Chao Xie,Zijian Wu,Minqiang Li,Lingtao Kong
The use of peroxymonosulfate (PMS) activation to eliminate organic contaminants is a promising technology to purify water owing to its strong reactivity. However, because of the existed rate limiting step, the performance of PMS activation was restrained and required external energy consumption. Therefore, a new strategy was proposed to solve this problem by preparing catalysts with abundant electron-rich sites and electron traps to accelerate PMS activation. In this research, a novel MnCeO x -H catalyst with rich surface oxygen vacancies was firstly synthesized to accelerate the transfer of electrons among the catalysts, oxidant and pollutants. The contaminants were rapidly eliminated in the MnCeO x -H/PMS system, while the reaction rate constant of MnCeO x -H/PMS system was 30 times higher than that of CeO 2 /PMS system. The surface oxygen vacancies were able to adsorb and trap PMS, then the free electrons of oxygen vacancies would reduce PMS and produced HO•, 1 O 2 and SO 4 •- , while 1 O 2 played a major role. The contaminants which acted as electron-donors in this system were adsorbed at Mn, Ce sites, achieving effective conversion recycling of Ce(IV)/Ce(III), Mn(III)/Mn(II) and Mn(IV)/Mn(III). This discovery is believed to inaugurate a novel way for designing powerful electron-rich sites and electron traps to accelerate PMS activation for contaminants degradation.
研究领域:
环境科学
·
催化化学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124713
·
IF 7.5
Bo Zuo,Yue Ma,Yudie Guo,Ruipu Wang,Li Guo,Shuxin Huang,Yuchi Chen,Junxia Yu
Glyphosate has received a great deal of attention due to its persistence in the environment and its potential carcinogenicity. Traditional Fenton catalytic methods for glyphosate removal are often hindered by the aggregation and passivation of catalysts, and the formation of toxic intermediates, such as aminomethylphosphonic acid (AMPA). In this study, a synergistic heterojunction comprising nano-zero-valent copper (nZVC) and CeO x was engineered on a biochar (BC) interface (nZVC/CeO x @BC) to investigate the behavior and mechanism of glyphosate degradation. The results showed that glyphosate removal reached 96.9% within 20 min, and complete degradation was achieved within 60 min in the nZVC/CeO x @BC/H 2 O 2 system. Importantly, the catalyst could be used in a pH range of 2–10, and the degradation efficiency of this catalyst remained above 95% even after six cycles. DFT calculations and experimental results revealed that the heterostructure facilitates interfacial electron transfer through the formation of electron bridges and the reversible Ce(III)/Ce(IV) redox couple. This enhanced electron-transfer pathway promoted the continuous activation of H 2 O 2 and generation of reactive oxygen species, thereby accelerating the oxidation and degradation of glyphosate while suppressing active-site deactivation and improving catalyst stability. Moreover, the degradation pathway was diverted towards the formation of the environmentally benign compound glycine (70.95 μM, conversion rate ≈ 60%), thus suppressing the formation of AMPA (0.18 μM, conversion rate ≈ 0.15%). This study highlights the crucial role of interfacial electron-transfer-enhanced heterojunctions in regulating glyphosate degradation pathways and provides an effective strategy for efficient glyphosate degradation.
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DOI
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 38
·385705
·
IF 2.9
Yongguang Xiao,Lisha Yang,Yong Jiang,Siwei Liu,Gang Li,Jun Ouyang,Minghua Tang
Lu doped Hf0.5Zr0.5O2 (HZO) ferroelectric films were prepared on Pt/TiN/SiO2/Si substrate by chemical solution deposition method, and an interfacial engineering strategy for improving the ferroelectric property was explored by capping the Lu doped HZO films with a cerium oxide layer. Compared with the Lu doped HZO film without the CeOx coating layer, the Lu doped HZO film with the CeOx coating layer has a larger remanent polarization (2Pr = 34.72 µC cm−2) and presents weaker wake-up behavior, which result from the higher orthogonal phase ratio and the lower oxygen vacancy of the CeOx coated Lu doped HZO film. In addition, the CeOx coating can remarkably improve the fatigue resistance and retention performance of the Lu doped HZO films. It is hoped that the results can provide an effective approach for the realization of high-performance and highly reliable hafnium oxide based ferroelectric thin films.
研究领域:
材料科学
·
铁电材料
·
薄膜
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DOI
高影响因子
危险品化学品经营许可证（带存储）