Article
Chemistry, Inorganic & Nuclear
Guanlun Guo, Jing Yu, Mingrui Wei
Summary: In this study, an Ag-CeO2-LSCF composite catalyst was prepared by impregnation method. The change in catalytic soot performance of the LSCF catalyst before and after composite was investigated. The results showed that the A-C-L composite catalyst exhibited a good microstructure and had lower characteristic temperatures compared to pure LSCF. The catalytic performance of the A-C-L composite catalyst was found to be the best when the Ag content was 8 wt%.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Jae Hwan Lee, Min June Kim, Eun Jun Lee, Dae-Won Lee, Chang Hwan Kim, Kwan-Young Lee
Summary: The study reveals that modifying the Rh loading can enhance the catalytic properties of CeO2, with the optimal Rh(2)Ce catalyst exhibiting higher reducibility and active oxygen species adsorption capacity. The promotional effect of Rh on the Ag/CeO2 catalyst results in higher catalytic activity, and the interaction between Rh and Ag induces changes in electronic states.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Jaesung Lee, Min Woo Lee, Min June Kim, Jae Hwan Lee, Eun Jun Lee, ChangHo Jung, Jin Woo Choung, Chang Hwan Kim, Kwan-Young Lee
Summary: The study compares Ag/LaCeO2 catalysts with different La contents to analyze the effect of La on catalytic performance. It is found that La doping can increase reducibility and oxygen vacancies, as well as improve soot oxidation performance, while excess La doping leads to a decrease in catalytic activity.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Hailong Tang, Meiling Wang, Yongqing Ma, Xiao Sun, Min Wang, Ganhong Zheng
Summary: In this study, Fe/CeO2 composite catalysts were designed to reduce the activation energy of the C-H bond and improve CH4 conversion. The existence of a solid-solution phase of Fe/CeO2 and a surface close-contact Fe2O3/CeO2 heterostructure was confirmed. Density functional theory calculations showed distinct charge accumulations on the substitutional-doped Fe sites, which effectively lowered the reaction energy of CH4 cleavage. The surface close-contact Fe2O3/CeO2 heterojunction improved carrier separation efficiency and photocatalytic performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Thermodynamics
Jia Fang, Chengcheng Yi, Ping Pu, Chen Chen, Yi Yang, Jiaxin Wang, Bin Lin
Summary: Ag/CeO2 catalyst synthesized by hydrothermal method was studied under different catalyst content, ash, and Ag load. It was found that Ag loading enhanced the catalytic activity of CeO2 and reduced the peak combustion temperature of soot. The catalytic effect of Ag/CeO2 was influenced by catalyst content, Ag load, and ash.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Chenglong Dou, Lili Lei, Zonglin Li, Zhongwei Meng, Pan Wang
Summary: A series of Ag-loaded Ag-CeO2 catalysts with different loadings (4.5%, 6.5%, 8.5% wt%) were prepared and tested for soot and C3H6 oxidation. The results showed that the 8.5% Ag loading significantly reduced the temperature and activation energy for soot combustion, and improved the conversion of C3H6. Characterization of the catalysts revealed that Ag(8.5)-CeO2 had the highest Ag/Ce3+ ratio and number of oxygen vacancies. This study provides insights into the oxidation performance of Ag-CeO2 and the factors influencing its catalytic activity.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Chemistry, Physical
Eun Jun Lee, Min June Kim, Jin Woo Choung, Chang Hwan Kim, Kwan-Young Lee
Summary: The Ag/2MnO(x)-1CeO(2) catalyst showed significantly improved soot oxidation and NO oxidation activity under NOx-assisted conditions, demonstrating the importance of NOx adsorption characteristics in the process.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Engineering, Environmental
Yaeun Seo, Min Woo Lee, Hyun Jae Kim, Jin Woo Choung, ChangHo Jung, Chang Hwan Kim, Kwan-Young Lee
Summary: The study showed that doping with appropriate amounts of Ag can increase the oxygen storage capacity of the catalyst and form active Pd-0 species, leading to improved catalytic activity for the oxidation of CO and C3H6.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Richuan Rao, Hanwen Liang, Chunming Hu, Huaze Dong, Xiongzi Dong, Yongqiang Tang, Song Fang, Qiang Ling
Summary: Ag-CeO2 nanoassemblies were prepared via a simple method, with a structure comprising Ag nanoparticles and CeO2 nanoparticles. The ease of Ag-CeO2 interface oxygen activation is strongly influenced by the pyrolysis temperature. Nanoassemblies prepared at higher temperatures exhibit higher catalytic activity due to more interfacial lattice oxygen provided at lower temperatures.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Sujie Chang, Hongliang Bao, Weixin Huang
Summary: In this study, it was found that Ag clusters supported on CeO2 undergo size-dependent redispersion or agglomeration processes at high temperatures, with segregation and reduction of Ag+ cations dissolved in CeO2 at 500 degrees C. The results demonstrate the significant role of surface restructuring of oxide supports in redispersing supported metal clusters.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Chao Sun, Guangfeng Wei, Huimin Liu, Zhen Huang, Feng Qin, Haitao Wang, Jing Zhao, Zhipan Liu, Linjuan Zhang, Haisheng Yu, Binghui Ge, Wei Shen, Hualong Xu
Summary: A TiO2-Pt-1-CeO2 ensemble with unprecedented reactivity was constructed using the phase junction confinement principle, enabling high efficiency in CO oxidation through weakened CO affinity, enhanced surface lattice oxygen reactivity, and lowered reaction barrier. This work demonstrates a plausible synthesis philosophy and reaction mechanism for SACs, creating a new frontier in reactivity.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Zonglin Li, Hong Ni, Pan Wang, Zhengtao Liu, Chengcheng Ao, Lidong Zhang, Yunjing Wang
Summary: Ag/CeO2 is a promising catalyst for mobile source soot emission control technologies, but there is a trade-off between hydrothermal aging resistance and catalytic oxidation performance. Through TGA experiments and characterization, the hydrothermal aging mechanism of Ag/CeO2 catalysts was investigated and the lattice morphology and valence changes were studied. The degradation mechanism of Ag/CeO2 catalysts in vapor environment was explained based on density functional and molecular thermodynamics theories. The decreased catalytic activity of Ag/CeO2 after hydrothermal aging was attributed to the less agglomeration and decreased O-II/O-I and Ce3+/Ce4+ compared with CeO2.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Longwen Chen, Feng Liu, Xiaoqian Li, Qiuzhen Tao, Zhaoqin Huang, Qi Zuo, Yanwu Chen, Tan Li, Mingli Fu, Daiqi Ye
Summary: Metal oxide-oxide interface on supported catalyst has been rarely studied. In this study, different Ag-supported CeO2/Co3O4 samples were prepared and grafted CeO2 on Co3O4 to improve the catalytic activity for soot oxidation. The formation of the CeO2/Co3O4 interface was found to significantly enhance the catalytic performance, and this enhancement was attributed to the increased contact and interaction between Co3O4 and CeO2, as well as the formation of abundant superoxide species and activated surface lattice oxygen. Density functional theory calculations showed that the CeO2/Co3O4 interface led to a redistribution of charge density and a reduction in the oxygen vacancy formation energy, promoting the reaction kinetics.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Environmental
Jae Hwan Lee, Deok Yeon Jo, Jin Woo Choung, Chang Hwan Kim, Hyung Chul Ham, Kwan-Young Lee
Summary: The study showed that the dispersion of noble metals on CeO2 and the interaction between each noble metal and CeO2 significantly influenced the catalytic activity towards soot oxidation. Rh/CeO2 and Ag/CeO2 exhibited the best activity, and the DFT calculations confirmed the similar order of experimental activity.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Guimin Jiang, Yiping Su, Huixia Li, Yafeng Chen, Shun Li, Yibin Bu, Zuotai Zhang
Summary: This study demonstrated the importance of understanding the interfacial effects between noble metals and supports in designing efficient and low-cost catalysts for HCHO removal. By utilizing CeO2 supports with different crystal planes and combining them with Ag, the researchers achieved high reactivity for HCHO oxidation, providing insights for the design of additional highly efficient and low-cost catalysts.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Bolun Yu, Denan Li, Qianqian Zhu, Shufan Yao, Lifeng Zhang, Yanshuo Li, Zhenxin Zhang
Summary: This study successfully improved the catalytic activity of a zeolitic octahedral metal oxide by incorporating a single zinc species into its micropore. The zinc incorporation achieved a high ethane conversion rate and ethylene selectivity. Mechanism study showed that the isolated zinc site played a crucial role in activating oxygen and ethane, as well as stabilizing intermediates and transition states.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Ruoqi Liu, Hao Fei, Jian Wang, Ting Guo, Fangyang Liu, Zhuangzhi Wu, Dezhi Wang
Summary: This work successfully synthesized a high-performing S-enriched MoS2 catalyst for electrocatalytic nitrogen reduction reaction (NRR), demonstrating high activity and selectivity. The synergistic effect of the 1T phase and bridging S22- species was shown to play a positive role in NRR performances, and DFT calculations revealed the mechanism behind the improved performance.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Pan Xia, Lele Zhao, Xi Chen, Zhihong Ye, Zhihong Zheng, Qiang He, Ignasi Sires
Summary: This study presents a modified gas-diffusion electrode (GDE) for highly efficient and stable H2O2 electrosynthesis by using trace polymethylhydrosiloxane (PMHS). DFT calculations provide an in-depth understanding of the roles of PMHS functional groups.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Kwangchol Ri, Songsik Pak, Dunyu Sun, Qiang Zhong, Shaogui Yang, Songil Sin, Leliang Wu, Yue Sun, Hui Cao, Chunxiao Han, Chenmin Xu, Yazi Liu, Huan He, Shiyin Li, Cheng Sun
Summary: Different B-doped rGO catalysts were synthesized and their 2e- oxygen reduction reaction (ORR) performance was investigated. It was found that the 2e- ORR selectivity of B-doped rGO was influenced by the B content and oxygen mass transfer conditions. The synthesized catalyst exhibited high 2e- ORR selectivity and was capable of degrading organic pollutants continuously.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Li Lv, Lin Lei, Qi-Wen Chen, Cheng-Li Yin, Huiqing Fan, Jian-Ping Zhou
Summary: Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 are widely used in photocatalysis due to their layered crystal structure. The electronic structures of these phases play a crucial role in their photocatalytic activity. Heat treatment in a nitrogen atmosphere introduces more oxygen vacancies into the S-scheme heterojunction, leading to enhanced NO removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Choe Earn Choong, Minhee Kim, Jun Sup Lim, Young June Hong, Geon Joon Lee, Keun Hwa Chae, In Wook Nah, Yeomin Yoon, Eun Ha Choi, Min Jang
Summary: In this study, the synergistic effect between argon-plasma-system (AP) and catalysts in promoting the production of reactive species for water remediation was investigated. By altering the oxygen vacancies concentration of CeO2/Bi2O3 catalyst, the production of hydrated electrons was stimulated for PFOA removal. The results showed that the built-in electric field in the Bi/Ce0.43 interface enhanced electron migration and eaq- generation, leading to improved PFOA removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yushan Wu, Di Xu, Yanfei Xu, Xin Tian, Mingyue Ding
Summary: Efficient synthesis of primary amines from carbonyl compounds was achieved via reductive amination using Ru@NC-Al2O3 as a catalyst, exhibiting high activity and selectivity under mild conditions.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yilan Jiang, Peifang Wang, Tingyue Chen, Keyi Gao, Yiran Xiong, Yin Lu, Dionysios D. Dionysiou, Dawei Wang
Summary: By controlling the content of Co and Ni in Co1-xNixFe2O4, the production of O-1(2) from H2O2 can be regulated. NiFe2O4, with the lowest lattice distortion degree, can efficiently produce O-1(2) as the dominant reactive oxygen species. The system also exhibits significant resistance to water matrix interference.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Shuai Feng, Donglian Li, Hao Dong, Song Xie, Yaping Miao, Xuming Zhang, Biao Gao, Paul K. Chu, Xiang Peng
Summary: In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Jia-Cheng E. Yang, Min -Ping Zhu, Daqin Guan, Baoling Yuan, Darren Delai Sun, Chenghua Sun, Ming-Lai Fu
Summary: This study successfully modulated the electron configuration and spin state of millimetric metal catalysts by adjusting the support curvature radius. The electronic structure-oriented spin catalysis was found to affect the degradation of pollutants, providing new insights for the design and production of highly active, reusable, and stable catalysts.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Tao Zhong, Su Tang, Wenbin Huang, Wei Liu, Huinan Zhao, Lingling Hu, Shuanghong Tian, Chun He
Summary: In this study, a highly efficient photocatalyst for the elimination of CH3SH was developed by engineering different crystal facets and coupling them with PHI. Cu (111)/PHI exhibited the highest elimination efficiency and showed good stability and reusability. The enhanced surface electron pump effect and effective adsorption mechanisms were revealed through comprehensive characterizations and DFT calculations.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Feifei Yang, Tianyu Zhang, Jiankang Zhao, Wei Zhou, Nicole J. Libretto, Jeffrey T. Miller
Summary: A Ni3Sn intermetallic nano particle was found to have geometrically isolated Ni sites that could selectively cleave C-O bonds in biomass derivatives. This nano particle showed high activity and selectivity towards 2-methylfuran, unlike Ni nanoparticles that produced other unwanted products derived from the aromatic rings.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Lulu Qiao, Di Liu, Anquan Zhu, Jinxian Feng, Pengfei Zhou, Chunfa Liu, Kar Wei Ng, Hui Pan
Summary: This study reveals that surface evolution plays a crucial role in enhancing the electrocatalytic performance of transition metal oxides for electrochemical nitrate reduction reaction (e-NO3RR). Incorporating nickel into Co3O4 can promote surface reconstruction and improve the adsorption of intermediates and reduce energy barriers, leading to enhanced catalytic performance. The reconstructed cobalt-nickel hydroxides (CoyNi1_y(OH)2) on the catalyst's surface serve as the active phase.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Xinyu Song, Yang Shi, Zelin Wu, Bingkun Huang, Xinhao Wang, Heng Zhang, Peng Zhou, Wen Liu, Zhicheng Pan, Zhaokun Xiong, Bo Lai
Summary: This study explores the discriminative activities and mechanisms for activation of O-O bond in peroxy compounds via single-atom catalysts (SACs) with higher coordination numbers (M-N5). The atomic catalyst (Fe-SAC) with Fe-N5 as the active center was constructed, effectively activating peroxymonosulfate (PMS), peroxydisulfate (PDS), and hydrogen peroxide (H2O2). The study demonstrates the degradation efficiencies of acyclovir are related to the O-O bond length in different peroxy compounds, and reveals the discriminative mechanisms for activation of O-O bond in different Fenton-like systems.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Yangzhuo He, Hong Qin, Ziwei Wang, Han Wang, Yuan Zhu, Chengyun Zhou, Ying Zeng, Yicheng Li, Piao Xu, Guangming Zeng
Summary: A dual-metal-organic framework (MOF) assisted strategy was proposed to construct a magnetic Fe-Mn oxycarbide anchored on N-doped carbon for peroxymonosulfate (PMS) activation. The FeMn@NC-800 catalyst exhibited superior activity with almost 100% degradation of sulfamethazine (SMZ) in 30 minutes. The study provided insights for the rational design of high-performance heterogeneous catalysts and proposed a novel nonradical-based catalytic oxidation for environmental cleaning.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)