Article
Chemistry, Physical
Zhi Liu, Guangyan Xu, Lingyou Zeng, Wei Shi, Yingjie Wang, Yanwei Sun, Yunbo Yu, Hong He
Summary: We prepared a PtPd-La1/Al2O3 catalyst with highly dispersed La species and Pt-PdO nanoparticles, showing significantly enhanced hydrothermal and long-term stability under the harsh conditions of simulated natural gas vehicle (NGV) exhaust. PdO nanoparticles can be anchored by highly dispersed La sites through electron transfer, inhibiting the sintering of Pd species during hydrothermal aging. Pt uniformly doped in PdO creates high-efficiency Pt sites and unsaturated Pd sites for water-resistance, further enhancing long-term stability. This work provides the potential to resolve tough challenges related to methane emission control on NGVs.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Jia-Wei Zhao, Hong Zhang, Cheng-Fei Li, Xia Zhou, Jin-Qi Wu, Feng Zeng, Jiangwei Zhang, Gao-Ren Li
Summary: This study demonstrates the key roles of surface Fe doping and Sr dynamic dissolution in achieving efficient lattice oxygen oxidation reaction (LOER) on perovskite catalysts. The design and fabrication of La/Sr-based perovskite catalysts with surface Fe sites and Sr vacancies enable superior LOER performance compared to the RuO2/C catalyst.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Physical
Feng Yi, Shane Q. Arlington, Justin Gorham, William Osborn, Ethan J. Crumlin, Slavomir Nemsak, David A. LaVan
Summary: The formation and thermal stability of Pt surface oxides on a Pt thin film were studied using ambient-pressure X-ray photoelectron spectroscopy. The results showed that at a certain oxygen pressure, the Pt surface oxide was formed and decomposed during heating and cooling processes, which is important for understanding the surface states and catalytic mechanisms of platinum films.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Applied
Bing Zhao, Wenlin Chen, Yifeng Tan, Fan Li, Mengkui Tian
Summary: A series of Ce1-xTixO2 mixed oxide catalysts were synthesized using sol-gel method and noble metal loading for soot oxidation. The Ti-doped Ce1-xTixO2 catalysts exhibited better oxidation performance than CeO2, with the Ce0.9Ti0.1O2 catalyst showing the highest catalysis activity when calcined at 500 degrees C. The introduction of Ti into CeO2 enhanced the catalytic activity and increased the number of oxygen vacancies on the catalyst surface. Noble metals dispersed over Ce0.9Ti0.1O2 showed enhanced activity compared to Ce0.9Ti0.1O2. A small amount of Ti doping improved the catalyst activity, while excessive Ti reduced performance due to hindered contact and reaction with soot.
JOURNAL OF RARE EARTHS
(2022)
Article
Engineering, Environmental
Ziwei Gao, Tao Zhang, Md. Nahid Pervez, Guojuan Qu, Wei Jin, Yaping Zhao
Summary: A bifunctional Co-doped La(OH)(3) composite with catalytic and adsorption active sites was synthesized and demonstrated excellent performance in removing As(III) from water. The Co-La/PMS system achieved nearly 100% As(III) removal within 10 minutes. The combined system showed significantly higher removal capacity and faster kinetics compared to Co-La adsorption alone. The enhanced performance was attributed to the production of reactive oxygen species and the generation of new adsorption sites. The Co-La/PMS system offers a promising approach for purifying arsenic-contaminated water.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Jianlin Cao, Xiaoqian Zhang, Xinxin Ou, Tao Liu, Tao Xing, Zhi Li, Xin Zhou, Hao Yan, Yibin Liu, Xiang Feng, Yongxiao Tuo, Chaohe Yang, De Chen
Summary: Developing efficient and stable catalysts for preferential oxidation of CO (CO-PROX) is crucial for industrial hydrogen resource purification. The introduction of dual promoters, Fe and K, optimizes the adsorption behaviors of reactants and achieves high CO conversion and CO2 selectivity under realistic application temperature range.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Lielie Liu, Shuyue Xie, Ruxangul Jamal, Tursun Abdiryim, Abdukeyum Abdurexit, Dongna Zou, Haile Liu, Yanyan Song
Summary: In this study, a facile method was used to prepare RuCoOx/N-CNT catalyst composited with PEDOT-SH and supported Pt nanoparticles (Pt NPs) for methanol oxidation reaction (MOR). The introduction of RuOx into CoOx in RuCoOx/N-CNT can generate a large number of oxygen vacancies, which serve as highly active centers and improve the hydrophilicity of catalysts, promoting the redox reaction kinetics. The structural characterizations confirm the presence of alloying and charge redistribution in RuCoOx/N-CNT@PEDOT-MeSH/Pt, and the oxygen vacancies effectively change the electronic structure and increase the density of active sites, enhancing MOR activity. Performance tests show that RuCoOx/N-CNT@PEDOTMeSH/Pt exhibits superior electrocatalytic activity (2003.3 mA mg-1Pt) compared to RuCoOx/N-CNT/Pt (1324.8 mA mg-1Pt) and commercial Pt/C (279.6 mA mg-1Pt) catalysts. This strategy provides a scheme for designing high-performance, low-cost anode catalysts in MOR.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Xudong Du, Yun Lang, Kun Cao, Jiaqiang Yang, Jiaming Cai, Bin Shan, Rong Chen
Summary: This paper designs bifunctional Pt/Ru nanoparticle catalysts via selective atomic layer deposition for PROX in H-2, showcasing optimal activity and selectivity. The enhancement in PROX performance is attributed to the elimination of competitive CO adsorption on Pt, allowing neighboring exposed Ru surfaces to provide highly active sites for O-2 dissociation.
JOURNAL OF CATALYSIS
(2021)
Review
Chemistry, Multidisciplinary
Kai Wang, Chen Han, Zongping Shao, Jieshan Qiu, Shaobin Wang, Shaomin Liu
Summary: This review comprehensively elaborates the advances of perovskite oxides in advanced oxidation processes (AOPs) for water remediation, providing insights into their performance, structure, and tuning methods. Strategies for designing novel perovskite oxides to enhance catalytic activities in AOPs have been highlighted.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Yang Chen, Jian Lin, Lin Li, Xiaoli Pan, Xiaodong Wang, Tao Zhang
Summary: This study found that Pt nanoparticles supported on an inert substrate can catalyze total CO conversion and CO2 selectivity over a broad temperature range, depending on the local structure of Pt active centers. The ensemble of Pt(OH) and metallic Pt plays a critical role in this process.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Rohini Khobragade, Pranali Dahake, Nitin Labhsetwar, Govindachetty Saravanan
Summary: The synthesis of alloy PdCu nanoparticles supported on an Al2O3 support as a catalyst for effective removal of CO from H-2-rich flue gases was reported in this study. The alloy PdCu catalyst showed improved CO oxidation performance and selective CO oxidation below a temperature range of 300 degrees C.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Applied
Enrico Sartoretti, Chiara Novara, Angelica Chiodoni, Fabrizio Giorgis, Marco Piumetti, Samir Bensaid, Nunzio Russo, Debora Fino
Summary: In this study, novel ceria-based nanocatalysts containing different quantities of La and Nd were prepared and their structural and physico-chemical properties were examined. Doping with La and Nd altered the morphology and oxygen deficiency of ceria and affected the catalytic activity towards CO, NO, and soot oxidation. Among them, the Ce-La equimolar oxide exhibited outstanding performances due to its optimal morphology and surface acidity.
Article
Chemistry, Multidisciplinary
Hanlin Chen, Gaoling Wei, Zijuan You, Xiaoliang Liang, Peng Liu, Yiping Yang, Fuding Tan, Suhua Wang, Jieqi Xing, Steven L. Suib
Summary: For perovskite La1-xCaxCoO3 (Ca-x, x = 0-0.3), Ca-0.2 with the closest O p band center to the Fermi level, exhibits the highest catalytic activity for toluene oxidation. The O p band center plays a crucial role in determining reducibility and active oxygen content. This discovery is beneficial for designing highly active perovskite catalysts.
CHEMICAL COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Bin Zheng, Tao Gan, Shaozhen Shi, Junhu Wang, Wenxiang Zhang, Xin Zhou, Yongcun Zou, Wenfu Yan, Gang Liu
Summary: By constructing stable Pt-support interfaces, the research achieved highly active CO oxidation, maintaining high activity even after long-term storage.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Yunan Li, Luozhen Jiang, Gui Zhao, Lingling Guo, Chen Tian, Xin Tao, Meng Du, Bing Nan, Xi Liu, Lina Li
Summary: High metal dispersion supported catalysts have been widely studied due to their high atom utilization and excellent activities in various catalytic reactions. In this work, Pt/Y2O3-HT catalyst was synthesized through a modified wet-impregnation method. The CO oxidation activity of Pt/Y2O3-HT was significantly improved compared to Pt/Y2O3 without hydrothermal modification. The comprehensive experiment results showed that hydrothermal aging at 200 degrees C enhanced the basicity of yttria support and greatly improved the dispersion of platinum at atomic level.
APPLIED SURFACE SCIENCE
(2023)
