Article
Chemistry, Physical
Zhijun Zhang, Kezhen Chen, Jichang Lu, Qin Zou, Yuhui Zhao, Yongming Luo, Dedong He, Rongtao Li
Summary: Investigation of Sn modified CuO-CeO2 catalysts showed that Sn-Cu-Ce-5 catalyst exhibited stronger interaction between active sites and support, higher amounts of Sn2+ and Ce3+, and increased amount of oxygen vacancies, leading to excellent catalytic performance even in the presence of CO2 and H2O.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Lulu Guo, Mengmeng Liu, Xuguang Zhang, Taotao Sui
Summary: In this study, a highly sensitive and stable CO gas sensor based on Pt-functionalized CeO2 nanorods was developed. The Pt-CeO2 sensor exhibited superior CO sensing performance with high response value, selectivity, rapid response/recovery speed, and remarkable long-term stability.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Yuhan Zhou, Shan Ren, Jie Yang, Weizao Liu, Zenghui Su, Zhichao Chen, Mingming Wang, Lin Chen
Summary: This study investigates the impact of oxygen vacancies on NO oxidation and SCR reactions by treating different crystal surface CeO2 catalysts with NH3. Results show that NH3-treated N-CeO2-NPs catalyst exhibits the highest oxygen vacancies and improves NO oxidation activity significantly.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
M. Tang, S. Liu, W. Fu, J. Wang, K. Yin, M. Zhu, J. Tian, Y. Sun, Y. Dai
Summary: In this study, celery-like CeO2 nanofibers were synthesized and used as a reliable support for Pt nanoparticles to enhance their catalytic activity and sinter resistance. The Pt@CeO2 nanoparticles showed stable catalytic performance at high temperatures.
MATERIALS TODAY NANO
(2022)
Article
Chemistry, Physical
Lichao Ma, Chuanmin Ding, Junwen Wang, Hong Xu, Kan Zhang
Summary: In this study, in situ X-ray photoelectron spectroscopy was used to investigate the surface chemical properties of ceria supported precious metals materials under different gas conditions and reaction temperatures. The results show that the changes in oxygen vacancies and Pt valence on catalyst surface have a significant impact on the reaction performance. At low temperatures, gas-phase oxygen cannot be directly utilized, but can absorb on the oxygen vacancies and Pt, leading to the reduction of oxygen vacancies and oxidation of Pt. Only when the temperature is higher than 400 degrees C, reactive oxygen species can be generated and participate in the reaction, promoting the reaction continuous.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Fan Lin, Kenneth Rappe, Libor Kovarik, Miao Song, Xiaohong Shari Li, Mark Engelhard, Yong Wang
Summary: Research has found that high-temperature pretreatment of CeO2 support can enhance the redox and hydrocarbon oxidation activity of Pt/CeO2 catalyst. Compared to untreated CeO2 support, high-temperature pretreated CeO2 support can enhance the mobility of surface lattice oxygen, thus promoting the oxidation activity of Pt/CeO2 catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Qingyue Wang, Yuxin Li, Ana Serrano-Lotina, Wei Han, Raquel Portela, Ruixuan Wang, Miguel A. Banares, King Lun Yeung
Summary: A unique 1D nanostructure of Pt@CeO2-BDC was prepared for toluene oxidation, facilitating the stepwise oxidation of toluene to CO2 and H2O. The presence of Pt clusters on the catalyst surface promoted the adsorption of toluene and reaction activation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Engineering, Biomedical
Jiankang Zhang, Yu Yang, Fengmin Qin, Tingting Hu, Xinshuo Zhao, Shichao Zhao, Yueqiang Cao, Zhe Gao, Zhan Zhou, Ruizheng Liang, Chaoliang Tan, Yong Qin
Summary: This study reports the generation and stabilization of oxygen vacancies on CeO2 nanorods by Pt nanoclusters at mild temperature, resulting in a highly efficient nanozyme (Pt/CeO2-x) for catalytic cancer therapy. The Pt deposited on CeO2 serves as a catalyst to generate and stabilize oxygen vacancies, and forms strong metal-support interactions with CeO2. The Pt/CeO2-x-350R exhibits excellent enzyme-mimicking catalytic activity, effectively eliminating cancer cells and ablating tumors in vitro.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Chemistry, Physical
Lichao Ma, Chuanmin Ding, Zili Ma, Junwen Wang, Hong Xu, Kan Zhang, Gangsen Li
Summary: This study found that steam treatment of Pt/CeO2 catalyst resulted in the formation of hydroxyl groups on the surface, forming Pt-OH species and achieving high Pt dispersion. Various analyses confirmed that steam dissociation at surface vacancies facilitated the activation and removal of lattice oxygen, generating oxygen vacancies. Calculations and in situ DRIFTS results showed that oxygen vacancies favored the activation of C-H bonds in methane. The Pt/CeO2-H2O catalyst with abundant oxygen vacancies exhibited excellent catalytic activity, with CH4 conversion rate, CO and H2 selectivity of 62%, 60%, and 58%, respectively. Moreover, defective engineering for methane partial oxidation can be extended to other redox reactions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Tomas R. Reina, Miriam Gonzalez-Castano, Victor Lopez-Flores, L. T. Marcela Martinez, Andrea Zitolo, Svetlana Ivanova, Wenquian Xu, Miguel Angel Centeno, Jose A. Rodriguez, Jose Antonio Odriozola
Summary: In this study, it was demonstrated using in situ X-ray absorption spectroscopy that both Au and Pt remain unoxidized during the water-gas shift (WGS) reaction, with significant differences in their dynamics under WGS atmospheres. While Pt undergoes restructuring into metallic particles, Au nanoparticles experience particle splitting and agglomeration processes, maintaining a zero oxidation state throughout the reaction.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
Saad Milad, Ali Nsar, Zainuriah Hassan, Kuan Yew Cheong, Way Foong Lim, W. F. Lim
Summary: This study introduced the incorporation of CeO2 seed layer for the growth of CeO2 nanostructures using Pandanus amaryllifolius leaf extract as a stabilizing agent. Results showed that samples with CeO2 seed layer demonstrated lower leakage current density regardless of the presence of MEA. The improvement in leakage current density could be attributed to high oxygen composition and adequate oxygen vacancies, while a discrepancy was observed in samples with MEA and without CeO2 seed layer where the oxygen vacancies acted as hole traps degrading the J-V characteristic.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Rubina Khatun, Rohan Singh Pal, Mohammad Ahmad Shoeb, Deepak Khurana, Shubham Singhl, Nazia Siddiqui, Mukesh Kumar Poddar, Tuhin Suvra Khan, Rajaram Bal
Summary: In this study, a defect-rich Ni-Pt/CeO2 catalyst with oxygen vacancy sites was synthesized using a one-pot complex combustion method. The catalyst exhibited high activity for CO2 dissociation at low temperature. Comparisons with conventionally impregnated catalysts demonstrated superior catalytic properties and stability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Nanoscience & Nanotechnology
Haodong Wang, Matthew Kottwitz, Ning Rui, Sanjaya D. Senanayake, Nebojsa Marinkovic, Yuanyuan Li, Ralph G. Nuzzo, Anatoly Frenkel
Summary: By combining aliovalent doping and oxygen vacancy generation, the study demonstrates an enhancement in the thermal stability of supported single-atom configurations.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Shuaishuai Zhang, Lingling Zhang, Li Liu, Xiang Chu, Xiao Wang, Shuyan Song, Hongjie Zhang
Summary: To address health threats caused by formaldehyde contamination, we introduced a CeO2 promoter into Pt/TiO2 catalysts to improve their catalytic performance. The resulting 0.2Pt/5Ce-TiO2 catalysts exhibited remarkable activity and stability, achieving nearly 100% formaldehyde conversion into CO2 and H2O. Further investigations revealed the crucial role of CeO2 in enhancing the catalytic performance by increasing surface oxygen vacancies and Pt-0 species.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Inorganic & Nuclear
Mengyi Ji, Waleed Yaseen, Huiping Mao, Changkun Xia, Yuanguo Xu, Suci Meng, Jimin Xie, Meng Xie
Summary: A facile strategy was developed to synthesize superhydrophilic Ni/CeO x @C electrocatalysts for efficient hydrogen evolution reaction (HER) in 1.0 M KOH. The resulting Ni2Ce1@C/500 catalysts exhibited Pt-like HER activity with a low overpotential at various current densities, outperforming commercial Pt/C and maintaining stability over 300 hours at high current density.
INORGANIC CHEMISTRY
(2023)
Article
Agriculture, Multidisciplinary
Yuxiang Gu, Haoran Chen, Xing Li, Dan Li, Yue Sun, Lin Yang, Ying Ma, Eric Chun Yong Chan
Summary: This study found that Lactobacillus paracasei IMC 502 can prevent and alleviate type 2 diabetes by mediating the gut microbiota-SCFA-hormone/inflammation pathway.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Liyun Zheng, Chun Yang, Liang Liang, Shengxiang Rao, Yongming Dai, Mengsu Zeng
Summary: This study aimed to explore the feasibility of pancreatic imaging at 5 T and evaluate the practical improvement of T2-weighted MRI and diffusion-weighted imaging (DWI) at 5 T as compared with 3 T. The results showed that imaging at 5 T provided higher image quality ratings and SNR compared to 3 T for both T2-weighted and DWI images. However, there were no significant differences in the mean ADC values and CV of ADC between 3 T and 5 T measurements.
Article
Chemistry, Organic
Mao-Lin Yang, Hao-Ran Chen, Long Zhao, Ming-Wu Ding
Summary: A new efficient synthesis method for the preparation of 6,12-dihydro-5H-quinazolino[3,2-a]quinazolin-5-ones has been developed. This method involves sequential Ugi/Staudinger/aza-Wittig/addition/nucleophilic acyl substitution reactions and provides a domino and effective strategy for the preparation of various substituted quinazolino[3,2-a]quinazolin-5-ones under mild reaction conditions.
SYNTHESIS-STUTTGART
(2023)
Article
Automation & Control Systems
Huiming Li, Hao Chen, Xiangke Wang
Summary: This paper investigates the problem of collision-free leader-follower formation generation and tracking of multiple fixed-wing unmanned aerial vehicles (UAVs). A novel control law based on physicomimetics approach is proposed to integrate formation generation, formation tracking, and collision avoidance. The artificial forces driven by control laws imitating physical forces are used to achieve desired collaborative behaviors and obstacle avoidance naturally. Speed constraints are also considered and modified using a saturation function. Numerical simulations and experiments are provided to verify the effectiveness of the proposed control scheme.
ASIAN JOURNAL OF CONTROL
(2023)
Article
Engineering, Environmental
Long Liang, Chunmin Zhang, Shaolei Zhao, Baozhong Liu, Limin Wang, Fei Liang
Summary: Designing efficient catalysts is a crucial challenge for practical applications of high-capacity hydride in fuel-cell-based hydrogen economy. In this study, platinum-functionalized Ti3C2 material with an accordion-like structure, interlayer, and surface-dispersed nanoparticles was synthesized. The catalyst, Ti3C2@Pt, reduced the initial dehydrogenation temperature of high-density hydride AlH3 by 50% to 62 °C, comparable to commercial AlH3. Moreover, it exhibited high hydrogen supplying performance and retention ratio, achieving 9.3 wt% and 98% respectively, surpassing previously reported catalysts. The exceptional dehydrogenation performance of the material makes it a practical candidate for mobile device applications with the aid of high-efficiency catalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Qiang Liu, Youjin Gong, Boyu Liu, Shunshun Xiong, Hui-Min Wen, Xiaolin Wang
Summary: In this study, an ultra-microporous alkyl Cu-based MOF-11 was developed for highly selective adsorption of xenon. The unique pore system of MOF-11 not only enables strong binding affinity with xenon, but also allows for dense packing of xenon molecules. MOF-11 demonstrates record-high xenon storage density, uptake, and selectivity, making it a promising candidate for xenon separation and capture.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Rheumatology
Haoran Chen, Huarui Liu, Wenting Lyu, Yin Liu, Mei Huang, Yingwei Zhang, Yuying Qiu, Yonglong Xiao, Hourong Cai, Jinghong Dai
Summary: This study retrospectively analyzed the clinical characteristics and risk factors of clinical recurrence in interstitial lung disease related to antisynthetase syndrome (ARS-ILD). Recurrence of ARS-ILD was common during medication intensity reduction, and age, lactate dehydrogenase (LDH), medication tapering duration, and discontinuation were identified as risk factors for recurrence.
CLINICAL RHEUMATOLOGY
(2023)
Article
Automation & Control Systems
Yuanmao Ye, Yongbin Zhang, Xiaolin Wang, Ka-Wai Eric Cheng
Summary: This article presents a new type of step-up multilevel inverter (MLI) using a front-side quasi-Z-source unit, which effectively limits the charging current variation and enhances the total voltage gain.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Yuanmao Ye, Minhao Chen, Xiaolin Wang, Lingling Cao
Summary: This article introduces a new boost-type common-ground photovoltaic (PV) inverter, which solves the problems of inrush charging current, input current quality, and boost capability by inserting a quasi-Z-source (qZS) unit into an SC-based common-ground inverter, and is experimentally verified.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Jianqiang Luo, Fei Teng, Siqi Bu, Zhongda Chu, Ning Tong, Anbo Meng, Ling Yang, Xiaolin Wang
Summary: This paper proposes a solution to address the traditional operational constraint issue in power systems considering converter-driven stability and elaborates on a power sensitivity-based power dispatch method to enhance stability margin and update operational constraint solutions.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2023)
Article
Chemistry, Physical
Yuxuan Lin, Mengxiao Diao, Jingxin Dai, Zhen Xu, Xinwei Zhao, Xiaojie Wen, Lingbo Xing, Xiong Zhou, Qiwei Chen, Jing Liu, Kai Wu
Summary: A molecular investigation reveals that Cu adatoms embedded in DCTP-Cu chains on Cu(111) surface are located at the hollow and bridge sites, leading to stepwise elimination of Cu adatoms in the chains. The interchain interaction plays an important role in the Cu-elimination process and promotes the cooperative Cu-elimination and C-C coupling of the OM segments in neighboring chains. These findings demonstrate the key role of molecule-substrate and intermolecular interactions in mediating the reaction processes of extended molecular systems on surfaces.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Review
Chemistry, Multidisciplinary
Hui-Ying Tan, Jiali Wang, Sheng-Chih Lin, Tsung-Rong Kuo, Hao Ming Chen
Summary: Single-atom catalysts (SACs) are promising electrocatalysts for energy conversion and storage due to their efficient atom utilization and unique electronic properties. The local coordination structures of single metal centers play a significant role in catalytic performances, and understanding the dynamic changes of SACs during reactions is crucial for improving catalytic activity.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Physical
Xiaoyan Bao, Dawei Lu, Zining Wang, Hao Yin, Biao Zhu, Bin Chen, Meixiang Shi, Yang Zhang, Qianxin Xu, Yumei Qin, Xing -Can Shen, Kai Wu
Summary: Using solar energy to convert CO2 into value-added chemicals has great potential to address global energy shortage and climate change. This study reports a novel strategy of preparing a boron-doped g-C3N4/TiO2-x composite catalyst (BCT) that shows extended full-spectrum absorption, rapid charge separation, and outstanding CO2 photoreduction performance. The CO2 conversion rate of BCT is 7.5 and 9.2 times higher than that of pure TiO2 and g-C3N4, respectively. Mechanistic studies reveal that the synergistic effects of BCT lower the energy barrier for CO2 conversion by altering charge density distribution. This work provides a new integrated strategy for fabricating efficient catalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Automation & Control Systems
Zhongjing Yu, Gangyi Zhang, Jingyu Chen, Haoran Chen, Duo Zhang, Qinli Yang, Junming Shao
Summary: This paper proposes a noise-resistant graph embedding method, called NGE, which leverages subspace clustering information to capture community structure and reinforce the relationship between topology and attributes. Experimental results demonstrate the superiority of this method in tasks such as community detection, link prediction, and node classification.
IEEE TRANSACTIONS ON CYBERNETICS
(2023)
Article
Chemistry, Physical
Zining Wang, Yumei Qin, Yu Chen, Yuchen Zhang, Qiwei Chen, Xiong Zhou, Kai Wu
Summary: By designing and fabricating one-dimensional titanium dioxide photocatalysts and incorporating a Pt co-catalyst and oxygen vacancies, efficient transformation of ethanol into value-added 1,1-diethoxyethane has been achieved. This strategy shows high conversion rate, selectivity, and potential for widespread applications.
