Article
Energy & Fuels
Qi Zhang, Hui Shang, Zonghao Xue, Aijun Duan
Summary: The formations of sulfur vacancies over various edges of Mo-based active phases were investigated using DFT calculations. Co/Ni doping was found to reduce the difficulty, and the S-edge had lower difficulty than the M-edge. The effect of electric field direction differed for each step of vacancy formation.
Article
Chemistry, Multidisciplinary
Jingwen Tan, Junjie Shao, Yanghao Shi, Wenbiao Zhang, Qingsheng Gao
Summary: Intercalated molybdenum disulfide with dimethylamine as a catalyst shows superior activity and selectivity in electrocatalytic hydrogenation reactions, making it a promising alternative to noble-metal catalysts.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Santiago Palencia-Ruiz, Denis Uzio, Christele Legens, Dorothee Laurenti, Pavel Afanasiev
Summary: Nanodispersed MoS2 and CoMoS2 materials with metastable 1T MoS2 phase were prepared using solvothermal technique and studied for their performance in electrocatalytic hydrogen evolution, thiophene hydrodesulfurization, and 1-pentene hydrogenation reactions. The role of different factors in stabilizing the 1T MoS2 phase was investigated, with ethylene glycol found to stabilize the polymorph. The presence of cobalt did not affect the stability of the 1T phase, but improved both HER and HDS performance by forming CoMoS species.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Engineering, Chemical
Qi Zhang, Hui Shang, Wenhui Zhang, Mohammad Al-harahsheh
Summary: The study utilized Density Functional Theory to investigate the impact of microwave electric field on the adsorption of H-2 molecules and the formation of sulfur vacancies on MoS2 nanocrystallites. The results indicated that the electric field can enhance the adsorption of H-2 on the edge of MoS2 clusters, promoting the formation of sulfur vacancies.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Jiaxing Chen, Shufang Wu, Xinlin Zhang, Yongjun Liu
Summary: This study proposes a strategy that combines defect control and metal doping to enhance the catalytic activity of unsupported MoS2 nanosheets. Few-layered defect-rich MoS2 nanosheets were synthesized by adjusting hydrothermal reaction conditions, and further improved by incorporating Ni atoms, achieving a high thiophene conversion rate.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Chunqiu Xia, Lanlan Xu, Zhihong Li, Liangqia Guo
Summary: MoS2 nanosheets with sulfur defects were prepared and found to possess peroxidase-like activity, which can be used for colorimetric detection.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Zhenhui Liang, Shaoqing Guo, Hongyu Dong, Zhenrong Li, Xing Liu, Xin Li, Hefei Kang, Li Zhang, Lijing Yuan, Liangfu Zhao
Summary: In this study, the MoS2/ACx catalyst for the hydrogenation of naphthalene to tetralin was prepared using modified activated carbon as a support. The modified catalyst showed improved catalytic performance due to the increased surface area, pore volume, oxygen-containing functional groups, and acidity. The MoS2/AC3 catalyst achieved the highest yield of tetralin, which can be attributed to its moderate acidity, proper hydrogenation activity, and the presence of oxygen-containing functional groups on the modified activated carbon surface.
Article
Materials Science, Multidisciplinary
Baoshan Tang, Yunshan Zhao, Changjie Zhou, Mingkun Zhang, Huili Zhu, Yida Li, Jin Feng Leong, Hao Shuai, Hao Gong, Weifeng Yang
Summary: The precise control of ion energy and dose allows for tuning surface defects of MoS2, with significant threshold voltage modulation observed in field-effect transistors based on monolayer MoS2 after Ga+ irradiation. First-principles calculations reveal that Ga impurities in monolayer MoS2 introduce defect states near the Fermi level, leading to a shallow acceptor level of 0.25 eV above the valence band maximum.
SCIENCE CHINA-MATERIALS
(2022)
Article
Energy & Fuels
Hui Dang, Sheng-Li Chen, Zhijie Wu, Lei Wang, Yan-ting Zhang
Summary: Selective hydrocracking (HDC) of tetrahydronaphthalene (THN) into light aromatic hydrocarbons, such as benzene (B), toluene (T), and xylene (X), was performed over bifunctional catalysts with different ZnO contents (W/Zn-Beta) at 400 degrees C and 6 MPa. It was found that ZnO can effectively regulate the acid properties of Beta zeolite and react with WO3 to form non-active ZnWO4 crystals, resulting in low HDC activity of the catalyst.
Article
Chemistry, Physical
Mohamed S. Hamdy, Fatimah A. Alqahtani, Mohd Shkir, Khaled F. Fawy, Mhamed Benaissa, Mohamed Bechir Ben Hamida, Noureddine Elboughdiri
Summary: In this study, a method of incorporating 1 wt% platinum nanoparticles into five different types of zeolites was proposed, and the catalytic performance of the resulting materials in the hydrogenation of cyclohexene was evaluated. The Pt-ZSM-5 catalyst showed the best catalytic performance, and it was able to convert cyclohexene completely within 35 minutes.
Article
Chemistry, Physical
Sourav Ghosh, Laurence Courtheoux, Sylvette Brunet, Patrick Lacroix-Desmazes, Annie Pradel, Etienne Girard, Denis Uzio
Summary: Several CoMoS/carbons were synthesized using hydrothermal-type approaches followed by a surface reaction with Co for the promotion step. The impact of carbon nanostructures (1D nanofibers/tubes or 2D nanosheets) as a matrix on the characteristics and catalytic properties of CoMoS crystallites was investigated in hydrotreating reactions. The microstructure was found to affect the HDS mechanism of 4-MethylDiBenzoThiophene (4-MDBT) and the selectivity of 3-MethylThiophene (3-MT) HDS/2,3-DiMethylBut-2-eNe (2,3-DM2BN) hydrogenation.
Article
Physics, Applied
Gernot Pacholik, Ludwig Enzlberger, Anna Benzer, Raffael Rameshan, Markus Latschka, Christoph Rameshan, Karin Foettinger
Summary: In this study, various Co, Ni, and K modified MoS2-based catalysts were synthesized and compared in their catalytic performance in CO2 hydrogenation, revealing that the addition of K reduced the selectivity to CH4 and affected the temperature at which the maximum methanol formation rate occurred. The materials were characterized using multiple techniques, and different species of Mo and O were observed under reaction conditions.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Wenzhe Wu, Xue Ren, Chengbo Zhang, Yanqi Ding, Hengjun Gai, Meng Xiao, Quanhong Zhu, Hongbing Song, Tingting Huang
Summary: The 1T-enriched spiny-shaped nanospheres with vertically oriented MoS2 nanosheets were successfully prepared using a novel solvent-induced micelle-limited self-assembly strategy. This method allows for controlled growth behavior and morphology of MoS2, resulting in high catalytic activity.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Lele Huang, Xu-Feng Liu, Jinglin Zou, Xinping Duan, Zuo-Chang Chen, Zhe-Hui Zhou, Linmin Ye, Xuelian Liang, Su-Yuan Xie, Youzhu Yuan
Summary: This study presents the immobilization of atomic ruthenium (Ru) with oxidized state on defect-rich hexagonal boron nitride (d-BN) nanosheets and the important interfacial electronic effect on Ru. Experimental results demonstrate the strong electronic interaction between vacancies and atomic Ru species. Compared to defect-free hexagonal BN (h-BN), d-BN can highly stabilize the active Ru species, resulting in significantly improved catalytic activity and durability.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Physical
Jia-Xin He, Yong-Shan Xiao, Chang Liu, Min-Li Zhu, Yong-Hong Song, Zhong-Wen Liu
Summary: The research found that the catalytic activity of MoS2 crystallites increases as the number of layers decreases, mainly due to the higher proportion of rim sites in crystallites with fewer layers, enhancing catalytic activity.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Feng Lin, Zongxuan Jiang, Nanfang Tang, Cen Zhang, Zhenpan Chen, Tiefeng Liu, Bin Dong
APPLIED CATALYSIS B-ENVIRONMENTAL
(2016)
Article
Chemistry, Physical
Cen Zhang, Ping Li, Xinyi Liu, Tiefeng Liu, Zongxuan Jiang, Can Li
APPLIED CATALYSIS A-GENERAL
(2018)
Article
Chemistry, Physical
Cen Zhang, Michael Brorson, Ping Li, Xinyi Liu, Tiefeng Liu, Zongxuan Jiang, Can Li
APPLIED CATALYSIS A-GENERAL
(2019)
Article
Chemistry, Physical
Cen Zhang, Xinyi Liu, Tiefeng Liu, Zongxuan Jiang, Can Li
APPLIED CATALYSIS A-GENERAL
(2019)
Article
Chemistry, Physical
Jing Cao, An Li, Yicen Zhang, Linchao Mu, Xi Huang, Yankun Li, Tao Yang, Cen Zhang, Congshan Zhou
Summary: In this study, highly dispersed nano-MoS2 with abundant defects and curved slabs were synthesized using a hydrothermal method, allowing for the anchoring of Co atoms and the formation of efficient active sites for the HDO process. The Co-doped catalyst with an optimal Co/(Co + Mo) molar ratio of 0.3 showed excellent performance in terms of conversion rate and selectivity. Additionally, the optimized catalyst exhibited good stability after a 72-hour reaction, attributed to the formation of abundant Co-Mo-S active sites optimizing the electrical structure of nano-MoS2.
MOLECULAR CATALYSIS
(2021)
Article
Chemistry, Physical
Jing Cao, Yicen Zhang, Cen Zhang, Lejuan Cai, Zelong Li, Congshan Zhou
Summary: This review summarizes recent progress related to the synthesis of defect-rich 1T-MoS2 materials and their catalytic application in HER. Advanced characterization methods for obtaining crystal phase and defect information of MoS2 are introduced. The challenges and future research directions of defect-rich 1T-MoS2 based materials towards efficient HER production are highlighted.
SURFACES AND INTERFACES
(2021)
Article
Energy & Fuels
Cen Zhang, Yicen Zhang, Huiting Zheng, Jundong Xu, Xinyi Liu, Jing Cao, Congshan Zhou
Summary: A phosphorous modification method was reported to improve the HDS activity and selectivity of CoMo/δ-Al2O3 catalyst simultaneously. The enhanced HDS performance was attributed to weakened metal-support interaction, resulting in the formation of a large amount of active (Co)MoS2 phase with higher stacking and Co promotion degree. The improved Co promotion degree promotes the HDS activity, while increased stacking decreases the olefin hydrogenation activity. When applied to a real FCC naphtha, the sulfur content could be reduced to 5.4 ppm with only a total research octane number loss of 0.7 units.
Article
Chemistry, Physical
Ping Li, Yandie Chen, Cen Zhang, Baokun Huang, Xinyi Liu, Tiefeng Liu, Zongxuan Jiang, Can Li
APPLIED CATALYSIS A-GENERAL
(2017)
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)