Article
Chemistry, Physical
Roberto Camposeco, Ana E. Torres, Rodolfo Zanella
Summary: The oxidation of propane to CO2 was conducted using Pt-Pd nanoparticles supported on TiO2. The Pt-Pd/TiO2 catalyst showed the highest activity due to the reduction of Ti4+ to Ti3+ by Pt-Pd bimetallic nanoparticles, enhancing the mobility of lattice oxygen on the TiO2 support and promoting the adsorption of propane.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Physical
Daeho Kim, Dongmin Park, Hee Chan Song, Beomgyun Jeong, Jouhahn Lee, Yousung Jung, Jeong Young Park
Summary: The strong metal-support interaction (SMSI) has a significant impact on the catalytic performance of supported metal catalysts, playing a central role in the modern chemical industry. However, understanding SMSI under realistic conditions remains challenging. This study provides evidence of SMSI between Pt and Co3O4 using both three-dimensional and two-dimensional model catalysts. The presence of Pt-Co3O4 interface, demonstrated by the formation of a Co3O4 overlayer on Pt nanoparticles, enhances catalytic activity and offers insights for designing high-performance heterogeneous catalysts.
Article
Chemistry, Physical
Haocheng Wu, Yuanbo Song, Yidan Liu, Guoli Chen, Mengmeng Zhang, Rongrong Jia, Yun Ling, Yili Shi, Xiang Wang, Lei Huang
Summary: By increasing the irradiation intensity, the interaction between Pt and TiO2 is strengthened, resulting in enhanced activity for HCHO oxidation. The balanced electronic and spatial structure promote the activation of oxygen species, facilitating both the conversion of dioxymethylene to HCOO- and the subsequent decomposition of HCOO-.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Applied
R. Camposeco, R. Zanella
Summary: The effect of gold nanoparticles supported on V2O5/TiO2 nanomaterials prepared by different routes and its activity in the CO oxidation at low temperature were studied. The sol-gel Au-V2O5/TiO2 material exhibited higher catalytic activity, especially after thermal treatment, compared to other materials such as Au-V2O5/NT nanotubes, Au-V2O5/P25 Evonik, V2O5/TiO2 nanomaterials, and Au/TiO2 catalyst. The improved catalytic activity can be attributed to the interaction between vanadium species and TiO2, facilitated by the presence of gold species, which allows for high vanadium oxidation states and charge transfer effects.
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)
Article
Chemistry, Physical
Xun Wang, Linke Wu, Zhiwei Wang, Ying Feng, Yuxi Liu, Hongxing Dai, Zhihua Wang, Jiguang Deng
Summary: In this study, a new material was prepared to improve the photocatalytic efficiency and reduce energy consumption in the oxidation of volatile organic compounds (VOCs). The material exhibited a rich pore structure and a large specific surface area, facilitating the adsorption of pollutants. Among the catalysts tested, 0.26 Pd/3.2 N-TiO2 showed the best performance. The results demonstrate that doping and loading can enhance the light absorption capacity and reaction activity of the material, leading to the generation of reactive oxygen species and the catalytic removal of pollutants.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Luong Xuan Dien, Toru Murayama, Nguyen Tuan Hung, Quang Duc Truong, Huynh Dang Chinh, Masamichi Yoshimura, Masatake Haruta, Tamao Ishida
Summary: Gold nanoparticles supported on titania catalysts were prepared using the solid grinding method, and the catalytic activity was improved by treatment with potassium tert-butoxide. The catalyst exhibited high catalytic activity and stability for CO oxidation.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Physical
Yasuo Iizuka, Yasuhiro Hiragi, Hikaru Yakushiji, Takumi Miura
Summary: Deposition of gold nanoparticles enhances the activity of CuO in CO oxidation by reducing the activation energy of lattice oxygen reduction at the gold/metal oxide interface.
APPLIED CATALYSIS A-GENERAL
(2021)
Review
Environmental Sciences
Chenglin Feng, Xiaolong Liu, Tingyu Zhu, Mengkui Tian
Summary: This article reviews recent research on the application of noble metal catalysts in the catalytic oxidation of CO, summarizing the effects of catalyst support, dopant, and physicochemical properties on the catalytic activity for CO oxidation. It emphatically discusses the influence of water vapor and sulfur dioxide on the catalytic activity in CO oxidation and presents several reaction mechanisms of CO catalytic oxidation on noble metal catalysts. Finally, the challenges of removing CO by catalytic oxidation in practical industrial flue gas are proposed.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Huimin Liu, Chenyi Yuan, Shipeng Wu, Chao Sun, Zhen Huang, Hualong Xu, Wei Shen
Summary: In this study, a nanoflower-like TiO2-supported Pd catalyst was developed with a higher concentration of oxygen vacancies and surface hydroxyl groups. The distinctive structure of the nanoflower-like TiO2 resulted in improved dispersion and stabilization of Pd species, as well as the activation of CO and O-2 molecules. As a result, the catalyst exhibited remarkable efficiency and stability in low-temperature CO oxidation reaction.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Sinqobile V. L. Mahlaba, Nasseela Hytoolakhan Lal Mahomed, Gerard M. Leteba, Alisa Govender, Eric van Steen
Summary: Platinum-based catalysts can selectively produce formaldehyde through the direct aerobic oxidation of methane in the presence of liquid water. The choice of support material significantly affects the catalyst's activity and product selectivity. Pt/TiO2-Rutile demonstrates high selectivity for formaldehyde formation, while TiO2-P25 leads to the formation of methanol and methoxymethanol. Catalyst deactivation is observed due to the accumulation of polymeric species on the surface.
Article
Chemistry, Physical
Wibawa Hendra Saputera, Tze Hao Tan, Emma C. Lovell, Aditya Rawal, Kondo-Francois Aguey-Zinsou, Donia Friedmann, Rose Amal, Jason A. Scott
Summary: Binary TiO2/SiO2 oxides were synthesized as supports for a Pt catalyst, with varying mole ratios of silica. Increasing the TiO2 : SiO2 ratio led to changes in specific surface area, crystal structure, and defect sites, affecting the catalytic performance for formic acid oxidation under dark conditions and following UV light pre-treatment. The Pt/1TiO(2)-2SiO(2) catalyst exhibited the highest catalytic rate, attributed to the simultaneous presence of PtOads and defect sites following UV-light pre-treatment.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Applied
Javier Amaya Suarez, Jose J. Plata, Antonio M. Marquez, Javier Fdez Sanz
Summary: This study utilizes density functional theory calculations to investigate the main reaction steps of CO oxidation at PtCu nanoparticles, revealing the significant role of the intermetallic surface structure in the high catalytic activity of these nanoparticles. By comparing with clean Pt (111) surface and different Cu-doped models, it is found that the presence of Cu induces segregation of CO and O-2 molecules at specific sites, leading to a unique CO-assisted mechanism for O-2 dissociation with a lower kinetic barrier compared to traditional Pt surfaces.
Article
Chemistry, Multidisciplinary
Z. Xu, J. Li, X. Wang, T. Wang, D. Li, Z. Ao
Summary: By integrating porous metal-organic frameworks as support, platinum as catalytic center, and cobalt as promoter, we obtained a synergistic and stable Pt-Co/UiO-66 catalytic system for efficient oxidation of various volatile organic compounds (VOCs). This catalytic system exhibited superior performance compared to monometallic catalysts in the oxidation of toluene, n-hexane, and ethyl acetate. Additionally, Pt-Co/UiO-66 showed high reusability, resistance to water and CO2, long-term stability, and structural integrity.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Applied
I. Lopez-Hernandez, V. Truttmann, C. Garcia, C. W. Lopes, C. Rameshan, M. Stoger-Pollach, N. Barrabes, G. Rupprechter, F. Rey, A. E. Palomares
Summary: The study investigated the dynamic evolution of bimetallic nanocluster catalyst during CO catalytic oxidation using in situ XAFS and DRIFTS techniques. The formation of AgAu alloyed nanoparticles was found to improve catalytic activity and stability, leading to higher conversion rates and consistent performance upon reuse.
Article
Chemistry, Physical
Xiang Liu, Binfen Wang, Qianqian Heng, Wei Chen, Xiying Li, Liqun Mao, Wenfeng Shangguan
Summary: The construction of a ternary 3D interconnected nanocomposite Ti3C2/MoS2/CdS with closely interfacial contact has been successfully achieved. This composite material exhibits excellent photocatalytic H-2 evolution activity by accelerating electron transfer and inhibiting carrier recombination.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Weiqi Guo, Pengfei Yu, Haolin Luo, Jiasheng Chi, Zhi Jiang, Xiaosong Liu, Wen Wen, Wenfeng Shangguan
Summary: The solid solution photocatalyst is crucial for designing one-step excitation water splitting systems. This study synthesized Bi0.5Y0.5VO4 solid solution and investigated the influence of surface structure variations at different temperatures on the catalytic activity.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Applied
Bingbao Mei, Cong Liu, Ji Li, Songqi Gu, Xianlong Du, Siyu Lu, Fei Song, Weilin Xu, Zheng Jiang
Summary: Quantitatively understanding the impact of atomic-level catalyst structural changes on the reactivity of the electrochemical CO2 reduction reaction is challenging. Operando high-energy resolution fluorescence-detected X-ray absorption spectroscopy was used in this study to identify the dynamic structural transformation of active sites of a model copper(II) phthalocyanine catalyst. The approach developed is a novel and powerful technique for elucidating complex catalytic mechanisms and may contribute to the rational design of highly effective catalysts.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Physical
Xiangyu Lu, Aomei Tong, Dian Luo, Fan Jiang, Jieding Wei, Yucheng Huang, Zheng Jiang, Zhou Lu, Yonghong Ni
Summary: This study developed atomically dispersed platinum clusters as a novel single atom co-catalyst for highly efficient photocatalytic hydrogen production. Experimental results verified the uniform dispersion of platinum clusters on CdS nanorods and the ability to quickly extract photo-generated electrons. density functional theory calculations demonstrated the superiority of monatomic platinum.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Multidisciplinary Sciences
Shangcong Sun, Ruijie Gao, Xianlong Liu, Lun Pan, Chengxiang Shi, Zheng Jiang, Xiangwen Zhang, Ji-Jun Zou
Summary: By regulating the work function and engineering the interfacial band bending, a direct Z-scheme photocatalyst is constructed. The research provides deep insights into the construction principles and photocatalytic performance of heterojunction photocatalysts.
Article
Chemistry, Multidisciplinary
Linmin Zhao, Xuetao Qin, Xirui Zhang, Xiangbin Cai, Fei Huang, Zhimin Jia, Jiangyong Diao, Dequan Xiao, Zheng Jiang, Ruifeng Lu, Ning Wang, Hongyang Liu, Ding Ma
Summary: Selective hydrogenation of alkynes to alkenes is crucial in the synthesis of fine chemicals. In this study, a Pd single-atom catalyst anchored to the shell of magnetic core-shell particles was used for semi-hydrogenation of phenylacetylene, achieving high selectivity and activity, as well as effective separation and recovery of the catalyst and substrate.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Bo Wu, Tiejun Lin, Min Huang, Shenggang Li, Ji Li, Xing Yu, Ruoou Yang, Fanfei Sun, Zheng Jiang, Yuhan Sun, Liangshu Zhong
Summary: A bimetallic catalyst PdCu/Z-5 was developed for the selective oxidation of methane to oxygenates at low temperature, achieving high yield and selectivity through the synergistic effect of PdO nanoparticles and Cu single atoms.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Bingbao Mei, Cong Liu, Fanfei Sun, Siyu Lu, Xianlong Du, Xiaopeng Li, Fei Song, Weilin Xu, Zheng Jiang
Summary: Potential-dependent selectivity changes are widely observed in electrocatalysis, but a detailed understanding of these changes at an atomic level is still lacking. In this study, we use a model atomically dispersed nickel catalyst to obtain a comprehensive view of potential-induced structure changes during the CO2 reduction reaction. Our findings show that the catalyst exhibits volcano-like selectivity changes that are dependent on the distance between the nickel atom and the carbon basal plane. Theoretical calculations suggest that local dynamic behaviors play a crucial role in regulating the distribution of the d band center of nickel.
Article
Chemistry, Physical
Lushan Ma, Ning Liu, Bingbao Mei, Kang Yang, Bingxin Liu, Kai Deng, Ying Zhang, Hao Feng, Dong Liu, Jingjing Duan, Zheng Jiang, Hui Yang, Qiang Li
Summary: This study reports an indium nanoelectrocatalyst that achieves high activity and selectivity for CO2 reduction at ultralow overpotentials. The catalyst exhibits near-unity CO2 reduction selectivity with high activity in a wide low-overpotential window. The study also demonstrates a high-energy conversion efficiency for CO2 electrolysis using this catalyst.
Article
Chemistry, Physical
Hongfei Ma, Yalan Wang, Hao Zhang, Guoyan Ma, Wei Zhang, Yanying Qi, Terje Fuglerud, Zheng Jiang, Weiping Ding, De Chen
Summary: Supported transition metal oxides, chlorides, carbides, and so forth (MXn) play a critical role in redox processes as catalysts. In this study, the nature of the interaction between monolayer CuCl2 and gamma-Al2O3, and its catalytic consequence induced by support facets in ethylene oxychlorination were illustrated. The effects of the interaction between CuCl2 and different exposed facets of gamma-Al2O3 (110) and (100) on catalytic performance were demonstrated through kinetic and theoretical studies, combined with operando spectroscopy. The catalyst with Al2O3 (110) showed better performance in terms of activity, selectivity, and stability.
Article
Chemistry, Physical
Jiajia Shi, Yao Wei, Dan Zhou, Leilei Zhang, Xiaofeng Yang, Zhili Miao, Haifeng Qi, Shengxin Zhang, Anqi Li, Xiaoyan Liu, Wensheng Yan, Zheng Jiang, Aiqin Wang, Tao Zhang
Summary: In this study, a stable single-atom catalyst (SACs) was designed to maintain its activity and stability under high temperature and reductive atmosphere.
Article
Chemistry, Multidisciplinary
Chaoqin Huang, Lei Xie, Huan Zhang, Hongbing Wang, Jinping Hu, Zhaofeng Liang, Zheng Jiang, Fei Song
Summary: This study successfully synthesized single-layer VSe2 on Au(111) using molecular beam epitaxy (MBE) and investigated its structural transformation and growth mechanism. The findings provide valuable insights into the growth mechanism of transition metal dichalcogenides and have important implications for their applications in catalysis and nanoelectronics.
Article
Chemistry, Physical
Jiajia Shi, Yao Wei, Leilei Zhang, Dan Zhou, Zhounan Yu, Shengxin Zhang, Xiaofeng Yang, Ji Yang, Yang Su, Zheng Jiang, Aiqin Wang
Summary: This study reports for the first time the significant promotional effect of potassium on the Co-N-C single-atom catalyst for the direct dehydrogenation of ethylbenzene. The introduction of potassium resulted in the formation of Co-O-K moiety, which facilitated the heterolytic cleavage of the C-H bond of ethylbenzene, achieving the highest steady-state reaction rate reported thus far.
Article
Chemistry, Applied
Weiqi Guo, Haolin Luo, Zhi Jiang, Wenfeng Shangguan
Summary: This study constructs S-scheme heterojunctions in photocatalysts through pressure-induced phase transition and finds that this structure can significantly enhance the overall water splitting activity. Characterization of carrier dynamics demonstrates that S-type heterojunctions contribute to improved carrier separation.
CHINESE JOURNAL OF CATALYSIS
(2022)
