APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Xin Li,Jun-Hao Wang,Zhao-Lu Feng,Jiang Shao,Hao Dong,Chen Li,Ya-Wen Zhang
The electroreduction of CO 2 to value-added chemicals is a lucrative route to simultaneously achieve renewable energy conversion and mitigate the greenhouse effect. Herein, an in-situ derived Bi 2 O 2 CO 3 /CeO 2 heterostructure is exquisitely constructed, which can produce formate with the faradaic efficiency of 98.6 % in ultra-broad potential windows of 3000 mV, and directly generate pure formic acid with the highest selectivity of 95.2 % and the maximal energy efficiency of 53.9 % in the neutral solid-electrolyte cell, surpassing most of the reported results and demonstrating the potential for future industrialization. The experimental and theoretical results indicate that the CeO 2 with abundant oxygen vacancies is conducive to facilitating the dissociation of water, serving as the source of active hydrogen species in the heterostructure. The Bi 2 O 2 CO 3 is used to effectively activate CO 2 and fast hydrogenate the crucial *OCHO-to-*OCHOH step accelerated by adequate supply of active hydrogen species. Thus, the heterostructure synergistically promotes the efficient conversion of CO 2 to cost-effective formic acid/formate products. As a result, this work provides a fundamental understanding and detailed exposition of Bi-based catalysts for highly selective CO 2 reduction and offers a unique but universal strategy for rational design and in-situ synthesis of heterostructure materials in various fields of energy storage and conversion.
研究领域:
能源化学
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催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Longwen Chen,Feng Liu,Xiaoqian Li,Qiuzhen Tao,Zhaoqin Huang,Qi Zuo,Yanwu Chen,Tan Li,Mingli Fu,Daiqi Ye
Metal oxide-oxide interface on supported catalyst has been rarely studied due to the complex interfacial structure and synthetic challenge. Herein, different Ag-supported CeO 2 /Co 3 O 4 samples with various covered-state of CeO 2 were prepared for catalytic soot oxidation. In comparison, catalytic activity was significantly improved by grafting CeO 2 on Co 3 O 4 , in which the best performing Ag/CoCe-2 exhibited remarkable catalytic performance towards soot oxidation with a T 50 of 290.5 ℃ under 10 % O 2 /N 2 . Catalyst characterization investigated by Scanning Electron Microscope (SEM), quasi in-situ X-ray Photoelectron Spectroscopy (XPS), in-situ Raman, etc. revealed that this outstanding promotion in catalytic activity can be principally ascribed to the formation of the CeO 2 /Co 3 O 4 interface. An appropriate CeO 2 dosage maximized the contact and interaction between Co 3 O 4 and CeO 2 , resulting in the largest CeO 2 /Co 3 O 4 interface featured with abundant generated superoxide species and activated surface lattice oxygen. Density functional theory (DFT) calculations were also carried out for the oxygen vacancy formation energy, Gibbs free energy, etc. In presence of the CeO 2 /Co 3 O 4 interface, a charge density redistribution around the adsorbed reactants at oxygen vacancies could be formed, owing to the efficient charge transfer enhanced by the electron-appealing effect. The change in electronic structure favored reducing the oxygen vacancy formation energy and boosting the lattice oxygen activation induced by the hybridized Co-O-Ce bonds, finally lowering the adsorption and activation barriers for reactive species and accelerating the reaction kinetics.
研究领域:
材料科学
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催化化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Dan Su,Xiaoyan He,Jiangwei Zhou,Chengqing Yuan,Xiuqin Bai
Biofilms adhering to different surfaces have significant negative impacts in various fields. Cerium oxide nanoparticles can serve as mimics of haloperoxidase for biological biofilm inhibition applications. The regulation of the exposed facet of CeO 2 nanoparticles influences their efficiency in various catalytic processes. However, there is still a lack of systematic studies on the facet-dependent haloperoxidase-like activity of CeO 2 . In the present study, the facet-dependent haloperoxidase activities and antibiofilm performance of CeO 2 nanoparticles were elucidated through experiment analysis and density function theory calculation. The as-prepared CeO 2 nanoparticles inhibited bacterial survival and catalyzed the oxidative bromination of quorum sensing signaling molecules, achieving biofilm inhibition performance. The antibacterial and biofilm formation suppression abilities were consistent with their haloperoxidase activities. The {111}- and {110}-facet CeO 2 nanopolyhedra, as well as the {110}- and {100}-facet CeO 2 nanorods , which had higher haloperoxidase activity showed better antibiofilm performance than the {100}-facet CeO 2 cubes. The present findings provide a comprehensive understanding of the facet-dependent haloperoxidase-like activity of CeO 2 . Furthermore, engineering CeO 2 morphologies with different crystal facets may represent a novel method for significantly adjusting their haloperoxidase-like activity.
研究领域:
材料科学
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微生物学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2025
·
IF 10.5
Xue Fan,Lujie Wang,Hongxin Wang,Liuyi Huang,Jiahui Lin,Xia Gao,Fengna Xi
An immunosensing platform was developed based on the enhanced electrochemiluminescence (ECL) of luminol-dissolved oxygen (O 2 ) by nanochannel-confined Ni(OH) 2 -CeO 2 composite nanozyme, which is able to sensitively detect cytokine. The mesoporous silica nanochannel array film (SNF), decorated on a cost-effective ITO electrode, features ultrasmall (2∼3 nm) nanochannels, enabling the confinement of in situ synthesized Ni(OH) 2 -CeO 2 composite nanozyme via a continuous electrodeposition process. Ni(OH) 2 -CeO 2 exhibits dual peroxidase (POD) and oxidase (OXD) enzyme-like activities, serving as an efficient oxygen reduction reaction (ORR) catalyst to produce reactive oxygen species (ROS) and catalyze luminol oxidation. Compared to nanozymes synthesized on flat electrodes, nanochannel-confined nanozyme demonstrates superior ECL enhancement. The combination of Ni(OH) 2 and CeO 2 exhibits strong synergistic catalytic performance, boosting ECL of luminol-O 2 under neutral conditions by 33.7 orders compared to electrode without confined nanozyme. Using tumor necrosis factor-alpha (TNF-α) as a proof-of-concept demonstration, immunosensor is fabricated by immobilization recognition antibodies on the SNF outer surface. TNF-α binding induces immunocomplex formation, reducing ECL signal by increasing interfacial resistance and hindering luminol diffuse. This enables sensitive TNF-α detection over a wide linear range (10 fg/mL to 10 ng/mL) with an ultralow detection limit of 8 fg/mL. The immunosensor demonstrates good selectivity, stability, and reproducibility.
研究领域:
生物医学工程
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分析化学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Siying Chong,Shuang Zhao,Jiaoyan Li,Gangwei Huang,Yajing Zhang,Ruirui Liu,Kangjun Wang
Gas-phase dehydrocyclization of biomass-derived 1,4-butanediol (BDO) to γ-butyrolactone (GBL) is a sustainable and environmentally friendly process conducted at atmospheric pressure. In the present work, a series of 15Cu/xMgO-yCeO 2 catalysts with different MgO: CeO 2 ratios were prepared by the ammonia vaporization method. The gas-phase dehydrocyclization of BDO to GBL was carried out over these Cu-based catalysts synthesized in a fixed-bed reactor. The physicochemical properties of the catalysts were investigated by XRD, SEM, TEM, FTIR, N 2 isothermal adsorption–desorption, H 2 -TPR, CO 2 -TPD, Raman, XPS, and EPR. The results indicated that the 15Cu/10MgO-90CeO 2 catalyst exhibited a smaller particle size, higher specific surface area, and increased oxygen vacancies than the 15Cu/CeO 2 catalyst. Operating conditions of 240 °C reaction temperature, 2.4 mL/h space velocity, and 98.92 % GBL yield from BDO dehydrogenation were achieved under 40 mL/min N 2 flow for 4 h. Density functional theory (DFT) calculations confirmed that the 15Cu/10MgO-90CeO 2 catalyst with more oxygen vacancies was more favorable for the adsorption and activation of BDO on the catalyst surface than 15Cu/CeO 2 , and its higher catalytic activity was attributed to the synergistic interaction between Cu + and oxygen vacancies on the catalyst surface.
研究领域:
催化化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2015
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IF 7.435
Siman Fang,Yongji Xin,Lei Ge,Changcun Han,Ping Qiu,Linen Wu
The novel ceria (CeO 2 ) hollow structures with uniform cubic, polyhedral and sphere shapes were successfully synthesized by template-engaged coordinating etching of shape-controlled Cu 2 O crystals. The obtained samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microcopy (TEM), high resolution of transmission electron microcopy (HRTEM), X-ray photoelectron spectroscopy (XPS), electron spin resonance (ESR) and photoluminescence spectroscopy (PL). The photocatalytic oxygen evolution via water oxidation was investigated for CeO 2 hollow structures with varied shapes under visible light irradiation. The photocatalytic results indicate that polyhedral CeO 2 nanocages show the highest photocatalytic activity, in contrast with spherical CeO 2 hollow structure and cubic CeO 2 hollow structure. The excellent catalytic activity can be attributed to the unique properties of the polyhedral CeO 2 nanocages, including efficient light refection through the inner shells, more active sites for enhancing separation efficiency of charge carriers. It is expected that this study could provide helpful results for designing and exploration of novel hollow structures with tunable photocatalytic performance.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
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IF 5.155
Haitao Li,Qiang Gao,Guanshuai Wang,Bo Han,Kaisheng Xia,Chenghang Zhou
Developing high-performance heterogeneous Fenton-like catalyst and understanding its intrinsic catalytic properties are of fundamental and practical significance. In this work, a mesoporous Mn(II)-doped CeO 2 (MCO) with monodisperse spherical morphology and large surface area (141.8 m 2 g −1 ) was fabricated through a simple hydrothermal–calcination process, and further utilized as the heterogeneous catalyst for oxidative degradation of organic pollutants in the presence of H 2 O 2 . The density functional theory (DFT) simulations were carried out to study the H 2 O 2 decomposition process on the MCO surface. It was revealed that the Mn(II) doping in the CeO 2 could significantly promote the complex of the surface Ce sites and H 2 O 2 molecules. More importantly, the manganese dopants could serve as electron reservoirs, capable of reversibly donating and accepting electrons, which facilitated the electron transfer between Ce and H 2 O 2 . Owing to the electron reservoir properties of manganese, this MCO showed significantly enhanced catalytic efficiency in comparison to pure CeO 2 . Moreover, the catalytic activity of MCO almost kept unchanged after reuse several times, demonstrating its long-circulating characteristics. This study provides new and important insights into the electron transfer pathway involved in the heterogeneous Fenton-like process.
研究领域:
材料科学
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环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2023
·
IF 13.1
Zhiyao Chu,Junqi Li,Hong Yong Sohn,Chaoyi Chen,Xiao Huang,Yuanpei Lan,Arun Murali,Junshan Zhang
In this work, novel CeO 2 –C-g-C 3 N 4 S-scheme heterojunctions with significantly enhanced photocatalytic performance were prepared for the first time by a facile one-step molten KCl–LiCl method. The formation mechanism of CeO 2 –C-g-C 3 N 4 was discussed, where g-C 3 N 4 turned to C by carbonizing and the surface C content was adjusted by controlling the synthesis conditions. The photocatalytic property of the ternary composites first increased and then decreased with synthesis temperature and time. The 580 °C 4h CeO 2 –C-g-C 3 N 4 exhibited the best performance towards MB (Methylene blue) and TC (Tetracyclines) degradation with a removal degree of 99.9% and 92.5%, respectively. The surface C/N ratio was a key index that influenced the photocatalytic performance, and was calculated to be 0.918–1.352 for various CeO 2 –C-g-C 3 N 4 catalysts. The 580 °C 4h CeO 2 –C-g-C 3 N 4 had an appropriate C/N ratio of 0.930 and a narrow band gap. The formed S-scheme 2D heterojunctions and generated C clearly promoted the separation of photo-excited e - / h + . Besides, it was indicated that e - and · O 2 − were the main active species for TC photodegradation . The 580 °C 4h CeO 2 –C-g-C 3 N 4 exhibited a large BET surface area, high negative zeta potential , strong π-π electron donor-acceptor interaction, and an excellent MB adsorption ability. It was evident that chemisorption on catalyst surface played an important role for adsorbing MB. The formation mechanism of CeO 2 –C-g-C 3 N 4 and the effects of the surface C/N ratio on photocatalytic performance, determined in this work, offer new insights for preparing and structuring highly effective photocatalysts , which is expected to promote further photocatalytic and adsorption applications.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Wen Luo,Jing Rong,Wanxia Zhao,Keke Kang,Lulu Long,Xiaojiang Yao
CeO 2 –TiO 2 catalysts with four different morphologies were successfully synthesized by a hydrothermal method and tested for selective catalytic reduction of NO x with NH 3 (NH 3 –SCR). For the four catalysts, CeO 2 –TiO 2 nanocubes (CT–NC) and nanorods (CT–NR) preferentially exposed {1 0 0} and {1 1 0} facets, respectively; furthermore, nanosheets (CT–NS) and nanospheres (CT–NH) mainly exposed {1 1 1} facet. Interestingly, CT–NH catalyst showed the best NH 3 –SCR performance and the NO x conversion exceeded 97% at 325 °C. Through a series of characteristic methods manifested that the short–range ordered structure of Ce–O–Ti in CT–NH catalyst provided stronger surface acidic sites to promote the high–temperature activity. Moreover, the abundant Ce 3+ species and appropriate reduction ability on {1 1 1} facet of CT–NH catalyst also caused outstanding de NO x activity. Reaction mechanism study showed that the Langmuir–Hinshelwood (L–H) mechanism and Eley–Rideal (E–R) mechanism existed simultaneously on all catalysts in NH 3 –SCR reaction. Meaningfully, two types of E–R mechanism were present on CT–NH catalyst, while L–H mechanism was dominant.
研究领域:
催化化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE SCIENCES
·
2024
·
IF 3.4
Ying Zhu,Tongkai Ji,Xingwei Cai,Jing Wang
A novel NiO/CeO 2 −mSiO 2 nanocages with superior peroxidase−like activities due to the synergetic effect between NiO and CeO 2 were fabricated by a simple etching−precipitation method with core−shell structured Cu 2 O@mSiO 2 as a sacrificial template. Based on the peroxidase−like activity of the NiO/CeO 2 −mSiO 2 nanocages, an enzyme cascade−triggered colorimetric sensing platform was exploited for alkaline phosphatase (ALP) detection, owing to the fact that ascorbic acid (AA) that is the ALP enzymatic hydrolysis product of ascorbic acid 2−phosphate (AAP) can efficiently reduce the oxidation product of TMB (oxTMB) generated under the catalysis of the NiO/CeO 2 −mSiO 2 . For the sensing of ALP, a good linear response was observed in the range of 0.0005–1.25 mU mL −1 with the limit of detection (LOD) as low as 0.00048 mU mL −1 . Furthermore, the proposed enzyme cascade−triggered colorimetric sensing platform could be further explored for sensing of tyrosinase, according to the fact that dopamine (DA) the catalytic product of tyramine (Tyr) by tyrosinase could initiate the redox reaction with the oxTMB acquired under the catalysis of the NiO/CeO 2 −mSiO 2 . A wide linear response was found for tyrosinase detection from 0.02 mU mL −1 to 3.4 U mL −1 with a LOD as low as 0.002 U mL −1 . This work not only offers a facile and effective approach to fabricate nanozymes with excellent catalytic activity, but also provides a promising enzyme cascade−triggered colorimetric method for the ultra−sensitive detection of biological enzymes.
研究领域:
生物化学
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纳米医学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Science China-Chemistry
·
2022
·Vol. 65
·期 10
·2038-2044
·
IF 10.138
Wang Yanan,Pei Chunlei,Zhao Zhi-Jian,Gong Jinlong
Rational design and performance promotion are eternal topics and ultimate goals in catalyst preparation. In contrast, trial—and—error is still the common method people take. Therefore, it is important to develop methods to intrinsically enhance the performance of catalysts. The most effective solutions are the one from a kinetic perspective based on clear knowledge of the reaction mechanism. This paper describes rate-determining step cognition and modulation to promote CO oxidation on highly dispersed Pt on CeO 2 . The different degrees of metal—support interactions due to variation of hydroxyl density of support could alter the structure of active species and the ability of oxygen activation apparently, further shift the rate-determining step from oxygen activation to oxygen reverse spillover kinetically. The transformation of rate-determining step could enhance the intrinsic activity significantly, and decrease the T 50 approximately 140 °C. The findings of this research exemplify the universal and effective method of performance elevation by rate-determining step modulation, which is promising for application in different systems.
研究领域:
催化
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化学工程
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材料科学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2019
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IF 1.795
Junchao Qian,Yaping Wang,Zhigang Chen,Chengbao Liu,Yuyang Zhou,Yue Yang,Yenan Song,Biao Kong
Mn 3 O 4 -CeO 2 /holey-graphene nano-composite was fabricated by hydrothermal reaction on the honeycomb-like porous graphene structure. The hybrid materials displayed enhanced capacitive performance (310 F·g −1 at 2 A·g −1 ). After 1000 cycles, the initial capacitance of the composite still has 92.4% retained. The improved electrochemical performance might be ascribed to the intimate combination of the pesudocapacitance from nanoparticles well-dispersed on graphene sheets and double layer capacitance from excellent conductive graphene scaffold. The investigation presents a promising application of nanoparticles/graphene composites as electrode materials for energy storage.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）