Article
Energy & Fuels
Jiajie Wang, Xin Xiao, Jing Li, Xinhua Gao, Jian Zheng, Wei Chu
Summary: This work presents the synthesis of hydrotalcite-derived Ni-LDO catalysts using sequenced precipitation for CO2 catalytic reduction to SNG. The performance enhancement achieved through regulating precipitation procedure resulted in a 7-fold increase in CO2 conversion rate per gram nickel compared to the traditional coprecipitation method. The optimized catalysts showed layered meso-porous properties and an increase in Ni particle size with higher coverage of medium strong basic sites. Sequential precipitation also led to surface nickel enrichment and promoted reducibility of the catalysts.
Article
Energy & Fuels
Han-Bing Gao, Le-Le Qiu, Fa-Peng Wu, Jian Xiao, Yun-Peng Zhao, Jing Liang, Yong-Hui Bai, Fang-Jing Liu, Jing-Pei Cao
Summary: C-O bonds in lignin can be efficiently cleaved by a hydrotalcite-derived Ni-based catalyst, leading to the production of high value-added bio-fuels and chemicals. The optimized Ni/Al2O3-500 catalyst exhibits excellent catalytic activity and stability, with complete conversion of diphenyl ether to monomeric products under optimized conditions. This catalyst shows promising potential in the hydrogenolysis of lignin derivatives.
Article
Energy & Fuels
Xian-Yong Wei, Qian-Qian Kong, Xiang Bai, Yierxiati Dilixiati, Zi-Chun Fan, Zhuang Li, Ji Zhao, Jia-Hao Li, Li Li, Yong-Hui Feng, Zhi-Min Zong
Summary: This study investigated the catalytic hydroconversion of lignin-derived soluble portion and the reaction mechanism over Ni/sepiolite catalyst. Cyclanes and cyclohexanols were identified as main products, while H...H and H+ were found to be crucial active hydrogen species in the reaction.
Article
Chemistry, Physical
Liang Jiang, Guangyue Xu, Yao Fu
Summary: The conversion of lignin into value-added chemicals is an important pathway for sustainable development. In this study, an AlPyOx support synthesized using phytic acid as the phosphorus source and pore former, along with Ni loading, exhibited high catalytic activity for the conversion of lignin model compounds to high-value-added chemicals under mild conditions. The unique activity of Ni/AlP0.5Ox can be attributed to the interaction between metallic Ni and AlP0.5Ox, as well as the unique adsorption of substrates on the carrier. Lignin can also be degraded over Ni/AlP0.5Ox, yielding identified monomers.
Article
Engineering, Environmental
Guoqiang Song, Claudia Li, Wenjun Zhou, Libo Wu, Kang Hui Lim, Feiyang Hu, Tianchang Wang, Shaomin Liu, Zhifeng Ren, Sibudjing Kawi
Summary: This study reports a structure-reconstruction strategy based on a micropore-confined process to prepare yolk-shell catalysts with highly dispersed metallic nickel. The size of the nickel particles has a significant impact on the rates of methane decomposition, penetration of dissolved carbon, and growth of carbon nanotubes (CNTs), which provides an important route for the design of functionalized CDM catalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Yan Xiao, Jie Li, Yuan Tan, Xingkun Chen, Fenghua Bai, Wenhao Luo, Yunjie Ding
Summary: The catalytic conversion of biomass-derived ethanol into n-butanol through Guerbet coupling reaction has attracted significant attention. In this study, a series of supported Cu catalysts were prepared and tested, and Cu/NiAlOx showed the best performance in terms of butanol selectivity and catalyst stability.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Feng He, Jiahao Zhuang, Bin Lu, Xianglin Liu, Jianling Zhang, Fangna Gu, Minghui Zhu, Jing Xu, Ziyi Zhong, Guangwen Xu, Fabing Su
Summary: The novel Ni-Zr-Al catalysts show superior low-temperature activity in CO2 methanation compared to Ni-Al catalysts and commercial Ni-based catalyst, due to the synergetic effects between Ni and ZrO2 resulting in more surface oxygen vacancies, basic sites, and abundant mesopores. In-situ DRIFTS analysis confirmed the CO2 methanation follows the intermediate formate route, providing a new theoretical understanding for CO2 activation and methanation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Applied
Yu Chen, Zemin Zhao, Ze Li, Jieying Jing, Wenying Li
Summary: In this study, a series of Ni-Co/NiAlOx catalysts were synthesized by reducing at different temperatures, and the catalytic activity for the hydrogenation of phenanthrene was evaluated. The catalyst reduced at 560 degrees C (Cat-560) showed high activity with a phenanthrene conversion amount of 8.0 mmol·g-1·h-1 and 98% perhydrophenanthrene selectivity. Cat-560 also exhibited superior specific activity and turnover frequency for symmetric octahydrophenanthrene hydrogenation, attributed to its special geometric and electronic structure.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Liting Yang, Ziqi Jin, Jing Zheng, Baishun Zhang, Jingli Xu, Xue-Bo Yin, Min Zhang
Summary: The integration of multiple functional components enhanced the catalytic performance of MoS2-based composites. The Co-MoS2/Pd@NCMTs composites showed superior catalytic activity, especially in colorimetric sensing and the reduction of 4-NP.
INORGANIC CHEMISTRY
(2022)
Article
Energy & Fuels
Wang Yin, Zhiwen Wang, Huaizhou Yang, Robbie H. Venderbosch, Hero Jan Heeres
Summary: This paper reports on the catalyst selection and performance evaluation for the mild and deep hydrotreatment of biomass-derived fast pyrolysis liquids (PLs). The results show that the PRICAT catalysts exhibit good performance and product quality in both mild and deep hydrotreatment.
Article
Agricultural Engineering
Xiaohui Yang, Chengjun Tang, Lihong Hu, Yonghong Zhou, Minghao Zhou
Summary: A novel strategy for producing biomass-derived monophenols from lignin by deconstructing C-O bonds under mild conditions was reported. Bimetallic catalysts derived from NiM-MOFs (M=Co, Mo, and Cu) were synthesized and a new binary solvents system of MeOH-THF was explored to enhance the selectivity of monophenols. High yields of lignin oil and mainly guaiacyl-type products, with the highest yield assigned to vanillin, were obtained, confirming the superiority of this catalytic system.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Chemistry, Physical
Jiahao Zhuang, Feng He, Xianglin Liu, Pengchao Si, Fangna Gu, Jing Xu, Yu Wang, Guangwen Xu, Ziyi Zhong, Fabing Su
Summary: The in situ synthesis of heterophase Ni nanocrystals on graphene, with a heterostructure of face-centered cubic (fcc) and hexagonal close-packed (hcp) phase, showed greatly improved catalytic activity and reusability in 4-nitrophenol reduction. The apparent rate constant and activity parameter were higher than reported non-noble metal and most noble metal catalysts, demonstrating the potential of creating heterophase metal nanocrystals with enhanced catalytic reactivity.
Article
Engineering, Environmental
Gui Chen, Mengqi Mao, Longwen Chen, Guangyi Zhang, Zikun Wang, Feng Liu, Daiqi Ye, Junliang Wu
Summary: A series of CeO2-based catalysts synthesized by pyrolysis of Ce-MOF precursors under various calcination temperatures were combined with non-thermal plasma to evaluate their plasma-catalytic performance in methanol oxidation. The catalyst with the highest methanol conversion, selectivity, and ozone suppression was obtained at 300℃ pyrolysis temperature. Various characterizations revealed that this catalyst had the highest specific surface area and oxygen vacancies. It also provided more active sites for methanol adsorption and oxidation, contributing to the improved performance. Additionally, it promoted the deep oxidation of methanol by converting ozone into active oxygen species. Based on the experimental results, a plausible reaction mechanism was proposed.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Metallurgy & Metallurgical Engineering
Bogu Liu, Bao Zhang, Haixiang Huang, Xiaohong Chen, Yujie Lv, Zhongyu Li, Jianguang Yuan, Ying Wu
Summary: In this study, density functional theory (DFT) calculations were used to investigate the effect of Ni/C co-incorporation on the hydriding reaction of Mg crystal. The results showed that both Ni and C incorporations were beneficial for H2 dissociation, with Ni significantly improving the process and making H diffusion the rate-limiting step. The catalytic effect of Ni was attributed to the bridging effect of Ni dxy orbitals. The incorporation of C weakened the strong interaction between Ni and H, hindering H diffusion on Mg and enhancing the overall performance of Ni/C co-incorporated Mg.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
Plaifa Hongmanorom, Jangam Ashok, Guanghui Zhang, Zhoufeng Bian, Ming Hui Wai, Yiqing Zeng, Shibo Xi, Armando Borgna, Sibudjing Kawi
Summary: Ni and Ni-Mg phyllosilicate mesoporous SBA-15 catalysts prepared via ammonia evaporation (AE) method exhibit superior catalytic performance in CO2 methanation compared to catalysts prepared via wetness impregnation (WI) method, due to enhanced metal-support interaction and weakly basic sites provided by surface hydroxyl groups. Incorporation of Mg into phyllosilicate structure increases medium basic sites, promoting monodentate formate formation and improving CO2 methanation activity. Additionally, the turnover frequency of CO2 conversion is correlated with the concentration of basic sites, and the strong metal-support interaction and confinement effect of SBA-15 can suppress metal sintering, ensuring good stability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Materials Science, Multidisciplinary
Yizhou Yang, Meikang Han, Christopher E. Shuck, Raj K. Sah, Jay R. Paudel, Alexander X. Gray, Yury Gogotsi, Steven J. May
Summary: High electrical conductivity is desired in MXene films for various applications. A systematic study was conducted to understand the contributions of composition and size to resistivity. The results showed that the Ti content correlated with conductivity and carrier mobility, while flake size and d-spacing had a more prominent impact on low-temperature transport.
Article
Materials Science, Multidisciplinary
Grace Cooksley, Marcus K. Dymond, Nicolas A. Stewart, Giselda Bucca, Andrew Hesketh, Joseph Lacey, Yury Gogotsi, Susan Sandeman
Summary: This study investigates the impact of two-dimensional titanium carbide MXene on pathways related to inflammation and epithelial-mesenchymal transition (EMT) using an in vitro LECs model. The results demonstrate that Ti3C2T(x) can decrease the expression of inflammatory cytokines and does not promote EMT, promoting a positive wound healing response.
Article
Chemistry, Physical
Katarina Adstedt, Madeline L. Buxton, Luke C. Henderson, David J. Hayne, Dhriti Nepal, Yury Gogotsi, Vladimir V. Tsukruk
Summary: Carbon fibers are important components in advanced structural composites due to their high strength to weight ratio and thermal and chemical stability. Surface interactions of graphene oxide (GO) and Ti3C2Tx MXene nanoflakes on carbon fibers were studied in this research. The study revealed that these 2D materials not only enhance interface strength but also facilitate efficient charge transfer and increased conductivity, broadening the potential applications of composites.
Article
Chemistry, Physical
Meikang Han, Yury Gogotsi
Summary: The rapid development of communication and electronic technologies has generated new demands for electromagnetic radiation protection. MXenes, a type of two-dimensional transition metal carbides and nitrides, have quickly reshaped the field since their introduction in 2016. This article provides a perspective on the recent progress and challenges of MXenes in electromagnetic jamming protection, specifically electromagnetic interference shielding and microwave absorption. It discusses the intrinsic properties and design strategies of MXenes for optimizing their performance in electromagnetic protection, aiming to clarify misconceptions and objectively assess reported materials. Finally, it examines the future opportunities and challenges in the development of MXenes for electromagnetic radiation protection.
Article
Materials Science, Multidisciplinary
Naresh C. Osti, Xiaobo Lin, Wei Zhao, Xuehang Wang, Chaofan Chen, Yu Gao, Takeshi Torita, Alexander Kolesnikov, Peter T. Cummings, Yury Gogotsi, Eugene Mamontov
Summary: In this study, the impact of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [EmimTFSI], ionic liquid and acetonitrile (ACN) concentrations on the electrochemical performance and ion dynamics of Ti3C2T (x) MXene supercapacitor was investigated. The results indicate that an optimal ACN concentration allows for more cations to attach to the MXene electrode surface, resulting in improved electrochemical performance. This increased capacitance is also associated with enhanced microscopic dynamics of the cation away from the pore wall. These findings provide guidance for optimizing the performance of MXene-based supercapacitors using organic solvents-ionic liquid-based electrolyte systems.
Editorial Material
Multidisciplinary Sciences
Yury Gogotsi
NATIONAL SCIENCE REVIEW
(2023)
Article
Chemistry, Multidisciplinary
Spencer R. R. Averbeck, Doris Xu, Brendan B. B. Murphy, Kateryna Shevchuk, Sneha Shankar, Mark Anayee, Marcelo Der Torossian Torres, Michael S. S. Beauchamp, Cesar de la Fuente-Nunez, Yury Gogotsi, Flavia Vitale
Summary: This study comprehensively investigates the stability of MXenes under various sterilization protocols and finds that autoclave and ethylene oxide sterilization do not alter the properties of MXenes, while hydrogen peroxide gas plasma sterilization severely degrades MXenes.
Article
Chemistry, Multidisciplinary
Siyi Hou, Chang Yu, Xuedan Song, Yiwang Ding, Jiangwei Chang, Yingbin Liu, Lin Chen, Qianbing Wei, Xiubo Zhang, Jieshan Qiu
Summary: An effective strategy is developed to modulate the in-plane defective density and electronic structure of multi-walled carbon nanotubes by ultra-small-sized g-C3N4 quantum dots via p-p stacking. The optimized heterogeneous catalyst exhibits an optimal photoelectric conversion efficiency of up to 8.30% in the triiodide reduction reaction, outperforming the Pt reference.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Mailis Lounasvuori, Tyler S. Mathis, Yury Gogotsi, Tristan Petit
Summary: Highly concentrated water-in-salt aqueous electrolytes have potential to replace flammable and toxic organic solvents in energy storage devices. By using operando infrared spectroscopy, this study investigates the hydrogen bonding changes of water confined between MXene layers during electrochemical cycling in a water-in-salt electrolyte. The results provide new insights into the structural changes of the electrolyte during Li+ intercalation in the MXene interlayer space.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yuanyang Xie, Chang Yu, Xiubo Zhang, Guibin Gu, Jinhe Yu, Yi Yang, Jieshan Qiu
Summary: The poor processability of hydroxide has hindered its practical applications. This study reports a processable highly concentrated double hydroxide ink that can be processed into various forms due to its interior-ordered structure, and it shows good performance in zinc ion batteries.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Teng Zhang, Christopher E. Shuck, Kateryna Shevchuk, Mark Anayee, Yury Gogotsi
Summary: Layered MAX phases and MXenes derived from them have been synthesized to expand the variety of known materials. The synthesis of three families of titanium carbonitride Tin+1Al(C1-y N-y ) n MAX phases and Tin+1(C1-y Ny )(n)T-x MXenes with different 2D layer thicknesses greatly expands the range of materials. The relationship among the composition, structure, stability, and synthesis conditions of the MXenes and their respective Al-based MAX phases has been investigated. These materials will enable fundamental studies of their properties and applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Marcelo A. Andrade, Timofey Averianov, Christopher E. Shuck, Kateryna Shevchuk, Yury Gogotsi, Ekaterina Pomerantseva
Summary: In this study, we demonstrate the synthesis of solid-solution MXenes through chemical etching to form oxides, which include vanadium oxide and niobium oxide. The results show that the formation of solid solutions facilitates the etching kinetics and accelerates the formation of MXenes. Moreover, the oxide derived from solid-solution MXenes exhibits composite-like behavior and shows good electrochemical cycling performance.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Meikang Han, Danzhen Zhang, Akash Singh, Tetiana Hryhorchuk, Christopher Eugene Shuck, Teng Zhang, Lingyi Bi, Bernard McBride, Vivek B. Shenoy, Yury Gogotsi
Summary: We have found that the MXene family of two-dimensional carbides and carbonitrides can produce selective and ultrathin films and coatings with different infrared emissivity values and colors. By combining different metals in solid-solution MXenes, the infrared emissivity can be finely tuned. Furthermore, the infrared identification capability has been validated using different MXene coatings and patterned MXene fabrics. MXenes' versatility at optical and infrared wavelengths provides a platform for developing MXene-based smart, flexible devices and wearables capable of selective and localized thermal management.
Article
Chemistry, Multidisciplinary
Xingyu Wang, Yu Shi, Jieshan Qiu, Zhiyu Wang
Summary: This study proposes a LiF-involved molten-salt etching method for producing delaminatable MXenes with comparable quality and supercapacitive performance to those made by solution etching. This approach combines the benefits of molten-salt etching in processability with the high exfoliation efficiency of the solution-based etching method.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yangjun Ma, Xiangtong Meng, Kai Li, Lipeng Zhang, Yadong Du, Xiang Cai, Jieshan Qiu
Summary: Electrocatalytic interconversion of iodide/triiodide is crucial for iodine-involved energy technologies. In this study, N,Se-co-doped porous carbon with enriched active sites (named NSeC) was fabricated through a two-step approach. Spectroscopy measurements confirmed the incorporation of extrinsic N and Se species into the carbon matrix. The NSeC sample synthesized at 900 degrees C exhibited excellent durability and high electrocatalytic activity towards triiodide reduction.
Article
Chemistry, Multidisciplinary
Xuemei Liu, Chaonan Cui, Shuoshuo Wei, Jinyu Han, Xinli Zhu, Qingfeng Ge, Hua Wang
Summary: This study presents a new strategy for designing efficient photocatalysts that can convert CO2 into hydrocarbons by utilizing synergistic catalytic sites. The findings provide a solution for the selective photocatalytic reduction of CO2 to CH4.
Article
Chemistry, Multidisciplinary
Chengxian Hu, Dan Wang, Lu Wang, Ying Fu, Zhengyin Du
Summary: A novel one-pot, three-component reaction conducted under electrochemical conditions was studied. The reaction involved 2-aminothiophenols, aldehydes, and malononitrile, using TBABF4 as an electrolyte and CuI as a catalyst. The proposed reaction mechanism suggested that CuI served as an electron relay. This method offers simplified operation, high atom economy, and mild reaction conditions.
Article
Chemistry, Multidisciplinary
Zhi Yang, Yu Chen, Linxi Wan, Yuxiao Li, Dan Chen, Jianlin Tao, Pei Tang, Fen-Er Chen
Summary: A highly enantioselective method for the complete hydrogenation of pyrimidinium salts using Ir/(S,S)-f-Binaphane complex as the catalyst was developed. This method provides easy access to fully saturated chiral hexahydropyrimidines, which are prevalent in many bioactive molecules. The reactions exhibit high yields and enantioselectivities under mild reaction conditions without additives. Successful application of this methodology in a continuous flow fashion further extends its practical utility.
Article
Chemistry, Multidisciplinary
Tina Jeoh, Jennifer Danger Nill, Wujun Zhao, Sankar Raju Narayanasamy, Liang Chen, Hoi-Ying N. Holman
Summary: In this study, the enzymatic hydrolysis of cellulose was investigated using real-time infrared spectromicroscopy. The spatial heterogeneity of cellulose was found to impact the hydrolysis kinetics. Hydration affected cellulose ordering, and Cel7A preferentially removed less extensively hydrogen bonded cellulose.
Article
Chemistry, Multidisciplinary
Tiphaine Richard, Walid Abdallah, Xavier Trivelli, Mathieu Sauthier, Clement Dumont
Summary: An effective method of grafting functionalities onto lignin based on glycerol carbonate has been developed using an efficient nickel-catalysed telomerisation reaction. This method allows lignin to have new reactive functions and reduces the glass transition temperatures of modified lignins, thereby expanding the application range of lignin-based resins.
Article
Chemistry, Multidisciplinary
Jing Qi, Xiyan Wang, Gan Wang, Srinivas Reddy Dubbaka, Patrick ONeill, Hwee Ting Ang, Jie Wu
Summary: This study presents a green and environmentally friendly approach for the synthesis of imides using electrocatalytic oxidation with H2O as the oxygen source. The method eliminates the need for toxic or expensive oxidants and achieves high yields under mild reaction conditions. It shows broad substrate compatibility and potential for industrial applications.
Article
Chemistry, Multidisciplinary
Babasaheb Sopan Gore, Lin-Wei Pan, Jun-Hao Lin, Yi-Chi Luo, Jeh-Jeng Wang
Summary: Here, we report a visible light-promoted intramolecular radical cascade reaction for the construction of fluorenol and naphthalene-fused cyclopropyl carbaldehyde derivatives. This method offers mild reaction conditions, a broad substrate scope, excellent step efficiency, and scalability, without the need for external chemical oxidants. The novelty of this protocol was demonstrated by synthesizing chrysene analogs and performing late-stage functionalizations.
Article
Chemistry, Multidisciplinary
Juho Antti Sirvio, Idamaria Romakkaniemi, Juha Ahola, Svitlana Filonenko, Juha P. Heiskanen, Ari Ammala
Summary: This article discusses the method of using supramolecular interaction between an aromatic hydrogen bond donor and lignin to achieve rapid delignification of softwood at low temperatures.
Article
Chemistry, Multidisciplinary
Yunyan Meng, Chunxiang Pan, Na Liu, Hongjiang Li, Zixiu Liu, Yao Deng, Zixiang Wei, Jianbin Xu, Baomin Fan
Summary: A novel visible light-driven synthesis method for 2,3-diamines has been developed, which has mild conditions, avoids the use of metal reagents, and can synthesize diamines and diols in one pot.
Article
Chemistry, Multidisciplinary
Mingqing Huang, Haiyang Huang, Mengyao You, Xinxin Zhang, Longgen Sun, Chao Chen, Zhichao Mei, Ruchun Yang, Qiang Xiao
Summary: A direct air-oxidized strategy for the synthesis of benzo[b]phosphole oxides was developed in this study. Arylphosphine oxides were transformed into phosphinoyl radicals, which were further combined with various alkynes to achieve the desired products. DFT calculations revealed the mechanism of phosphinoyl radical formation.
Article
Chemistry, Multidisciplinary
Anwei Wang, Jiayin Huang, Chunsheng Zhao, Yu Fan, Junfeng Qian, Qun Chen, Mingyang He, Weiyou Zhou
Summary: This study demonstrates an innovative strategy for the aerobic oxidation of C(sp(3))-H bonds using gamma-valerolactone. By optimizing the reaction conditions and utilizing specific catalysts, efficient oxidation of C(sp(3))-H bonds is achieved with good chemoselectivity in certain cases.
Article
Chemistry, Multidisciplinary
Shun Li, Likai Tong, Zhijian Peng, Bo Zhang, Xiuli Fu
Summary: Sulfide compounds show promise as electrocatalysts for water splitting, but their performance is limited by factors such as limited active sites and hindered substance transport. This study successfully prepared a high-entropy sulfide (ZnCoMnFeAlMg)(9)S-8, which reduced grain size and increased specific surface area, enabling the realization of a dual-functional catalyst with multiple catalytic sites. High entropy also modulated the electronic properties of sulfides, reducing the potential energy barrier for hydrolysis. This research introduces a new approach for functionalizing high entropy nanomaterials and improves the performance of water splitting catalysts.