Article
Energy & Fuels
Ya Gao, Yan Wei, Weidong Sun, Guofeng Zhao, Ye Liu, Yong Lu
Summary: Ni-based catalysts with Ni nanoparticles embedded in S-1 zeolite show high activity/selectivity and resistance to carbon deposition and Ni-sintering. However, they still suffer from deactivation due to the formation of a dense Ni-3(Si2O5)(2)(OH)(2) layer that blocks the contact between Ni and reactants.
Article
Materials Science, Multidisciplinary
Tamara S. Moraes, Vanderlei S. Bergamaschi, Joao C. Ferreira, Estevam Spinace
Summary: A core-shell catalyst was tested for ethanol steam reforming reaction under low-temperature conditions, showing excellent activity and high coke inhibition capacity compared to other catalysts.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Chenlu Xie, Eddie Sun, Gang Wan, Jian Zheng, Raghubir Gupta, Arun Majumdar
Summary: We report a unique core-shell nanostructured photocatalyst, silica encapsulated TiO2 decorated with AuPd nanoparticles (TiO2@SiO2-AuPd), which prevents methanol overoxidation and exhibits high selectivity and yield of oxygenates even at high UV intensity. The working principles of this core-shell photocatalyst were also systematically investigated. This design concept was further demonstrated to be applicable for the selective oxidation of other alkanes.
Article
Chemistry, Multidisciplinary
Jeongeon Kim, Xenia Medvedeva, Jury J. Medvedev, Cheongwon Bae, Juyeong Kim, Anna Klinkova
Summary: Understanding the relationship between structure and performance in nanoscale electrocatalysts for urea electrolysis is important for efficient waste treatment and hydrogen production or CO2 reduction. We investigate the role of lattice strain in Pd-Ni core-shell nanocubes on the dominance of the urea overoxidation pathway.
Article
Chemistry, Physical
Abbas Khaleel, Abdul Rasheed Pillantakath, Abdulmuizz Adamson
Summary: Coking is a major cause of catalyst deactivation in catalytic methane reforming processes. Doping the support of Ni/g-Al2O3 catalysts with iron was found to significantly enhance coking resistance in methane partial oxidation, mainly due to the redox functionality of iron after reduction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Jieyi Shen, Lishuang Wang, Xuedong He, Shun Wang, Jiadong Chen, Juan Wang, Huile Jin
Summary: In this study, a new class of Cu/In2O3 nanoparticles was prepared as superior electrocatalysts for CO2RR, which exhibited high CO/H-2 ratios and total faradaic efficiency in a wide potential range. The excellent performance of these catalysts was attributed to the electronic interaction between amorphous In2O3 and Cu, expanding the possibilities for designing and preparing fascinating electrocatalysts for CO2RR.
Article
Chemistry, Physical
Hua Yang, Zemin An, Yuanjie Xu, Lizhi Wu, Li Tan, Yu Tang
Summary: The restructuring of a catalyst under working conditions has significant impact on its performance. In this study, the behavior of a Ni supported on TiO2 catalyst during the partial oxidation of methane (POM) was investigated. Oscillations in the catalyst's performance, with rapid deactivation and activation, were observed while the catalyst remained active. The formation of inactive NiTiO3 due to strong metal-support interaction (SMSI) in the reductive atmosphere of POM products led to catalyst deactivation.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Physical
Muhammad Anees Ul Hasnain, Asif Hussain Khoja, Faaz Ahmed Butt, Mariam Ayesha, Faisal Saleem, Muhammad Taqi Mehran, Rabia Liaquat, Majid Ali, Zaki Ismail Zaki
Summary: In this study, partial oxidation of methane using Mg-Ni-Al (MNA) hydrotalcite promoted CeO2 catalyst was investigated. The CeO2@MNA catalyst showed good activity and stability, making it suitable for catalytic synthesis reactions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Applied
Xiaoqing Feng, Tao Wang, Long Mu, Zhilin Chen, Jinhu Liang, Chao Xiao
Summary: Supported palladium catalysts have shown promise for the combustion/oxidation of unburned methane. In this study, core-shell Pd@silicalite-1 catalysts were synthesized and CO-FTIR method was used to probe the completeness of the zeolite shell. The Pd@S-x (x = 1.5, 2.0) catalysts exhibited excellent stability in practical wet conditions.
Article
Chemistry, Physical
Chunyang Dong, Di Hu, Karima Ben Tayeb, Pardis Simon, Ahmed Addad, Martine Trentesaux, Danilo Oliveira de Souza, Sergei Chernyak, Deizi V. Peron, Amelle Rebai, Jean-Francois Guillemoles, Xavier Wallart, Bruno Grandidier, Andrei Y. Khodakov, Negar Naghavi, Vitaly V. Ordomsky
Summary: Selective methane photocatalytic oxidation to CO and H2 at ambient conditions is a main challenge in the chemical industry. In this study, conventional Cu (In,Ga)Se2 (CIGS) absorbers used in solar cells were found to be excellent candidates for methane valorization. A thin film of CIGS coated over Mo demonstrated exceptional performance in methane partial oxidation to CO and H2, with a stable CO productivity of 2.4 mmol per gram of CIGS and a selectivity to CO of over 80%.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Sun-Woo Kim, Jae Chul Ro, Su-Jeong Suh
Summary: Ni/Ni3C core-shell nanoparticles with an average diameter of approximately 120 nm were synthesized via a chemical solution method. It was observed that a thin Ni3C shell measuring approximately 1-4 nm formed on the surface of the nanoparticles over time, and the Ni core consisted of multiple grains. The saturation magnetization of the core-shell nanopowders decreased in proportion to the amount of Ni3C. The synthesis mechanism of the Ni/Ni3C core-shell nanoparticles was proposed based on XRD, XPS, and TEM analyses.
Article
Chemistry, Physical
Huafan Li, Nan Zhou, Tianli Zhu, Hailian Tang, Guoyi Bai
Summary: This study reported a Ni-catalyst supported on H2O2 modified nanodiamonds (NDs) which exhibited much improved catalytic activity and stability for the phenol hydrogenation reaction compared to the other two catalysts with untreated NDs and high temperature N-2 treated NDs as supports. The interaction between the ND support and nickel species was enhanced by simple H2O2 pretreatment while maintaining the excellent structural stability of the ND. This study emphasizes the importance of support selection and pretreatment, and offers new insights for the design and development of supported catalysts.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Ahad Hussain Javed, Nadia Shahzad, Faaz Ahmed Butt, M. Abdullah Khan, Nida Naeem, Rabia Liaquat, Asif Hussain Khoja
Summary: The study successfully utilized Co-Ni loaded ZnO nanoprisms as catalysis for partial oxidation of methane to produce syngas, demonstrating high catalytic activity and a high CH4 conversion rate. The catalyst showed a high selectivity towards H2, stability, and good performance in reaction pathways.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Analytical
Yan Gong, Xiaofeng Wu, Xiaofei Li, Anqi Wang, Min Zhang, Yunfa Chen
Summary: Core-shell Pt@Al-doped ZnO nanoparticles were synthesized and assembled into a sensor, showing excellent sensitivity and low detection limit towards acetone. The synergistic effect between Al doping and metal-ZnO hetero-interfaces significantly improves the acetone sensing properties of the sensor.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Multidisciplinary Sciences
Xiaohui Zhang, Zhihu Sun, Rui Jin, Chuwei Zhu, Chuanlin Zhao, Yue Lin, Qiaoqiao Guan, Lina Cao, Hengwei Wang, Shang Li, Hancheng Yu, Xinyu Liu, Leilei Wang, Shiqiang Wei, Wei-Xue Li, Junling Lu
Summary: Core-shell bimetallic nanocatalysts have been widely studied in heterogeneous catalysis. In this study, Au@Pd core-shell catalysts were investigated and it was found that a large Au core with a thin Pd shell is crucial for achieving optimum benzyl alcohol adsorption and high catalytic activity. A series of Au@Pd/SiO2 catalysts with different core sizes and shell thicknesses were fabricated, and it was observed that the activity increased with core size but varied nonmonotonically with shell thickness. The findings reveal the importance of conjugated dual particle size effect in bimetallic catalysis.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Lei Li, Jun Wu, Jingling Shao, Zhe Tang, Yong Dai, Huawei Chen
Article
Chemistry, Physical
Lei Li, Feng Chen, Jingling Shao, Yong Dai, Jianfei Ding, Zhe Tang
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2016)
Article
Chemistry, Physical
Lei Li, Wei Chu, Cheng Ding, Xinguo Xi, Ruiyu Jiang, Jinlong Yan
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2017)
Article
Chemistry, Physical
Lei Li, Ruiyu Jiang, Wei Chu, Hui Cang, Huawei Chen, Jinlong Yan
CATALYSIS SCIENCE & TECHNOLOGY
(2017)
Article
Chemistry, Physical
Lei Li, Qiangqiang Meng, Weijie Ji, Jingling Shao, Qi Xu, Jinlong Yan
MOLECULAR CATALYSIS
(2017)
Article
Chemistry, Inorganic & Nuclear
Lin Sun, Jie Xie, Zhidong Chen, Jun Wu, Lei Li
DALTON TRANSACTIONS
(2018)
Article
Chemistry, Physical
Lei Li, Changyu Zhang, Jinlong Yan, Dong Wang, Yue Peng, Junhua Li, John Crittenden
Article
Chemistry, Applied
Jun Ni, Zhenni Tan, Qianjin Sai, Jie Zhu, Xiuyun Wang, Bingyu Lin, Jianxin Lin, Chak-tong Au, Lilong Jiang
Summary: A new strategy has been developed to confine Ru and/or Co nanoparticles in the channels of N-doped carbon using benzoic acid, which results in a catalyst with high resistance against Ru sintering, showing excellent activity and long term stability for NH3 synthesis. This study provides a new avenue for simple fabrication of precious-metal-based catalysts that are highly resistant against sintering, specifically suitable for low-temperature synthesis of ammonia with outstanding efficiency.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Chemistry, Applied
Lei Li, Liping Song, Zhaoyang Fei, Wei Chu, Xiaofeng Luo, Jinlong Yan
Summary: The effects of different support materials on the catalytic performance of toluene removal were investigated. The Mn-Ce binary oxides supported on ZrO2 showed the best catalytic activity, attributed to low-temperature reducibility and abundant surface species. XPS and TPR results revealed good interaction between Mn and Ce elements in MnCe/ZrO2, and weak interaction between metal oxide and support promoted the dispersion and reduction of MnCe oxides at low temperature.
JOURNAL OF RARE EARTHS
(2022)
Article
Chemistry, Physical
Minghao Yuan, Jinlin Jiang, Fan Xue, Jianwei Deng, Yong Dai, Lei Li, Mifen Cui, Xu Qiao, Zhaoyang Fei
Summary: Improving surface area and the number of oxygen vacancy is crucial for enhancing catalytic oxidation performance. In this study, a plasma-engraved technique was used to modify the surface of Co3O4 nanostructures (with cube and sphere morphology), and applied to the oxidation reaction of formaldehyde. It was observed that the plasma-engraved Co3O4 nanostructures exhibited enhanced efficiency for formaldehyde oxidation at room temperature. The plasma treatment resulted in surface reconstruction, increased surface area, and rich oxygen vacancies, which greatly contributed to the improved catalytic activity. Additionally, the surface reaction mechanism was proposed based on in-situ DRIFTs, showing the transformation of CHOH to key intermediates before eventually forming CO2 and H2O. This study also provides an efficient strategy for surface modification of solid catalysts and expands their application in environmental catalysis.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Lei Li, Yuanhao Jin, Meijie Wei, Renqi Wang, Zhaoyang Fei
Summary: Hollow structural MnCoOx catalysts were prepared using metal-organic frameworks as sacrificial templates. The hollow MnCoOx nanocages showed higher performance in toluene oxidation compared to MnCoOx nanoparticles synthesized by co-precipitation. The addition of Pt species greatly boosted the catalytic performance of hollow Pt/MnCoOx-H nanocages, indicating a synergistic effect between Pt and the support.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
Jinlin Jiang, Cuicui Wang, Shuai Zhao, Fan Xue, Lei Li, Mifen Cui, Xu Qiao, Zhaoyang Fei
Summary: Tuning the metal-support interaction is an effective strategy for improved catalytic performance. Two types of LaMnO3 supports, achieved by plasma treatment or traditional thermal treatment respectively, were used to prepare Pd/LaMnO3 catalysts. Among these catalysts, the Pd supported on plasma-treated LaMnO3 (Pd/LMO-P) exhibited the best catalytic activity and the lowest activation energy. XPS techniques also showed that the plasma-treated catalyst promoted electron transfer and improved the redox properties between PdOx and LaMnO3. Additionally, the plasma-treated catalyst demonstrated excellent performance in a thermal and water-vapor coexistence environment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Qingqing Tian, Zhicheng Wang, Minghao Yuan, Shuai Zhao, Huawei Chen, Lei Li, Mifen Cui, Xu Qiao, Zhaoyang Fei
Summary: Perovskite oxides prepared by plasma-induced strategy with enhanced lattice distortion show excellent low temperature CH4 oxidation activities, providing a novel and universal strategy for the synthesis of composite oxide catalysts with rich surface defects.
ENVIRONMENTAL SCIENCE-NANO
(2021)
Article
Chemistry, Physical
Lei Li, Meijie Wei, Feng Chen, Weijie Ji
Summary: The Pt embedded Co3O4 hollow structure nanocomposites (Pt@Co3O4) exhibited superior performance in toluene combustion due to the interaction between Pt and Co3O4, Pt being present in the lower oxidation state, and the high mobility of active oxygen species enabled by a greater number of available oxygen vacancies in the structure. The study also proposed a possible reaction pathway based on in situ DRIFTS spectra, showing that chemically adsorbed toluene was oxidized to surface intermediates and eventually completely oxidized into CO2 and H2O.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Lei Li, Qilei Yang, Changyu Zhang, Jinlong Yan, Yue Peng, Junhua Li
ACS APPLIED NANO MATERIALS
(2019)