Article
Chemistry, Physical
Zhenping Cai, Yongxin Ding, Jiayin Zhang, Panjie Yu, Yongde Ma, Yanning Cao, Ying Zheng, Kuan Huang, Lilong Jiang
Summary: In this study, oil-soluble Mo-based ionic liquids were used as precursors to produce MoS2 catalysts for the hydroconversion of biolipids. The in situ generated MoS2 catalysts showed excellent activity in converting methyl palmitate and hexadecane to biodiesel. The structures of the catalysts were characterized, and the hydroconversion kinetics and pathways were analyzed. High conversions of feeds and selectivities of HDO products were achieved in the hydroconversion of methyl palmitate and palm oil under solvent-free condition.
JOURNAL OF CATALYSIS
(2023)
Article
Energy & Fuels
Jing Chen, Zongyan Ma, Jiaheng Qin, Ming Chen, Linkun Dong, Weiwen Mao, Xueqi Zhou, Yu Long, Jiantai Ma
Summary: By synthesizing rod-like CoNi alloy catalysts, a selectivity of up to 94.9% for cyclohexanol can be achieved under mild reaction conditions. The synergistic effect of the CoNi alloy also enhances the hydrogen adsorption capability and catalytic activity.
Article
Engineering, Environmental
Lin Hu, Xian-Yong Wei, Mei-Ling Xu, Yu-Hong Kang, Xian-Hou Guo, Feng-Bin Zhang, Zhi-Min Zong, Hong-Cun Bai
Summary: This research demonstrates that Pd-based zeolite catalysts show high catalytic activity in the HDO conversion of Guaiacol, resulting in high yield of hydrocarbons.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Applied
Yongjian Zeng, Lu Lin, Di Hu, Zhiwei Jiang, Shaimaa Saeed, Ruichao Guo, Ibrahim Ashour, Kai Yan
Summary: This study constructed a highly dispersed Ru nanoparticles anchored on Ni3Al1 layered double oxides (LDOs) catalyst derived from NiAl layered double hydroxides (LDHs) with flower-shaped morphology by a simple deposition-reduction method. The introduction of LDHs-derived support can significantly impact the catalytic activity for the hydrodeoxygenation (HDO) of lignin-derived vanillin (VL) into 2-methoxy-4-methylphenol (MMP).
Article
Chemistry, Physical
Mohammad Saleheen, Osman Mamun, Anand Mohan Verma, Dia Sahsah, Andreas Heyden
Summary: Bio-oil derived from lignocellulosic biomass can be used as a substitute for petroleum fuels after deoxygenation. In this study, the hydrodeoxygenation mechanism of guaiacol, a bio-oil model compound, on Pt(1 1 1) terrace sites in the presence of different solvents was investigated using first-principles DFT calculations and microkinetic reactor modeling. The results revealed that catechol was the major aromatic product, and the rate controlling species and transition states varied in different reaction environments.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Congcong Li, Yoshinao Nakagawa, Mizuho Yabushita, Akira Nakayama, Keiichi Tomishige
Summary: The study found that Fe/CeO2 catalysts modified with noble metals showed better catalytic performance in guaiacol hydrodeoxygenation reaction compared to unmodified catalysts, and the addition of water contributed to the stability of the catalytic reaction.
Article
Energy & Fuels
Tao Liu, Zhipeng Tian, Weijie Zhang, Bowen Luo, Libin Lei, Chao Wang, Jianping Liu, Riyang Shu, Ying Chen
Summary: In this study, the controllable selective hydrodeoxygenation (HDO) of phenolic compounds derived from pyrolysis lignin-oil to cyclohexanol using a RuFe bimetallic catalyst was investigated. The optimized 2Ru2.5Fe/Al2O3-EG catalyst exhibited excellent catalytic performance, achieving 99.99% guaiacol conversion and 81.35% cyclohexanol selectivity. The intimate contact between Ru and Fe2O3 species in the catalyst was found to improve the cyclohexanol selectivity.
Article
Chemistry, Physical
Zhennan Xiong, Guilei Zhu, Hui Wu, Gejun Shi, Pu Xu, Huimin Yi, Yiyang Mao, Baofeng Wang, Xuebin Yu
Summary: Layered MoS2 has potential as cathode material for MLIBs, but its low capacity and poor cycling stability limit its application. Highly dispersed MoS2 nanoflowers are synthesized and exhibited improved electrochemical performance, providing a method to enhance MoS2 properties.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Mingrui Li, Kowsalya D. Rasamani, Yugang Sun
Summary: Utilizing highly dispersed Pd nanoparticles attached to the surface of silica nanospheres for photocatalytic hydrodeoxygenation (HDO) of vanillin enables efficient deep HDO yield under mild reaction conditions. The reaction kinetics of the photocatalytic HDO process is orders of magnitude higher compared to the catalytic HDO process in the dark.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Justin Marlowe, Peter C. Ford, Mahdi M. Abu-Omar, Phillip Christopher
Summary: This study explored the structure sensitivity of Pt catalysts for the hydrodeoxygenation (HDO) of dihydroeugenol (DHE), finding that the Pt particle size and exposed active sites have an impact on aromatic ring hydrogenation and methoxy removal reactions. By controlling the catalyst structure and active sites, high selectivity in HDO reactions can be achieved.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Jin Leng, Jiapei Wang, Wenjie Peng, Zilong Tang, Shengming Xu, Yong Liu, Jiexi Wang
Summary: In this study, highly-dispersed submicron single-crystal LiNi0.8Co0.15Al0.05O2 cathode material was efficiently prepared using spray pyrolysis technique, balancing the contradiction between high crystallinity and cation disordering. The optimized SC-NCA cathode demonstrated excellent rate performance and stability, showing potential for practical applications in lithium ion batteries.
Article
Chemistry, Physical
Na Ji, Xinyong Diao, Zhihao Yu, Zhenyu Liu, Sinan Jiang, Xuebin Lu, Chunfeng Song, Qingling Liu, Degang Ma, Caixia Liu
Summary: The study focuses on the efficient conversion of biomass-derived ethyl levulinate (EL) to gamma-valerolactone (GVL) using MoS2-based supported catalysts for catalytic transfer hydrogenation (CTH). The morphology of MoS2 and acid distribution on the support were found to closely influence the CTH activity of EL to GVL. The MoS2/AC catalyst demonstrated high catalytic performance with excellent activity and selectivity, reaching 97.2% conversion of EL and 91.2% selectivity of GVL under optimized conditions.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
A. V. Vutolkina, I. G. Baigildin, A. P. Glotov, Al. A. Pimerzin, A. V. Akopyan, A. L. Maximov, E. A. Karakhanov
Summary: Efficient hydrodeoxygenation of guaiacol via in situ hydrogen generated through Water Gas Shift (WGS) reaction over nanosized unsupported NiMoS catalysts with tunable selectivity toward cyclohexene was reported. The reaction offers a direct reaction route for oxygen-containing compounds from bio-oils depending on catalyst precursors and reaction conditions. The proposed reaction routes and mechanisms for hydrodeoxygenation of guaiacol were also discussed.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Ranran Liu, Wei An
Summary: Low-coordination active sites are crucial for promoting specific catalytic reactions. Stepped M@Pt(211) single-atom alloys exhibited superior deoxygenation activity for lignin-derived phenolics compared to flattened M@Pt(111), attributed to the beneficial geometric effects of the low-coordinated step/edge sites and multiple viable adsorption modes.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Anjie Wang, Zhiquan Yu, Yao Wang, Guoqiang Zhang, Zhichao Sun, Ying-Ya Liu, Chuan Shi, Wei Wang
Summary: A highly dispersed Ni3P/HZSM-5 catalyst was prepared using deposition-precipitation, electroless plating, and thermal treatment methods. The catalyst exhibited excellent catalytic performance in the hydrodeoxygenation reaction.
JOURNAL OF CATALYSIS
(2022)
Article
Engineering, Environmental
Bishnu Prasad Bastakoti, Debasish Kuila, Carlos Salomon, Muxina Konarova, Miharu Eguchi, Jongbeom Na, Yusuke Yamauchi
Summary: Mesoporous oxides with well-defined porous structures are excellent supports for metal nanoparticle catalysts, preventing aggregation and enhancing catalytic performance. Metal/metal oxide heterojunctions exhibit unique chemical and physical properties due to surface reconstruction and electron transfer/interaction at the interface. Various synthesis methods for metal-supported hybrid nanostructures are reviewed, showing applications as catalysts in environmental remediation and sensors for detecting hazardous materials.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Applied
Sabiha Akter Monny, Zhiliang Wang, Muxina Konarova, Lianzhou Wang
Summary: This study summarizes the latest research on bismuth-based photoelectrodes for photoelectrochemical water splitting, discussing strategies to achieve high stability and performance.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Chemistry, Physical
Miharu Eguchi, Muxina Konarova, Nagy L. Torad, Te-An Chang, Dun-Yen Kang, Joe Shapter, Yusuke Yamauchi
Summary: The gas barrier film, made from water and layered aluminosilicates, exhibits moderate permeance due to capillary flow and high adhesion. It is particularly effective in preserving fresh produce with low respiration rates, blocking oxygen transfer and microorganisms, and preventing gas leakage by tightly adhering to the produce surface.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Md M. Hasan, Nuno Batalha, Gabriel Fraga, Mohamed H. M. Ahmed, L. Pinard, Muxina Konarova, Steven Pratt, Bronwyn Laycock
Summary: Catalytic pyrolysis of plastic waste offers an economical and efficient way to convert plastic waste into high-quality products. The experiment showed that different zeolite catalysts have different effects on the conversion mechanism of plastic waste. The polymer structures and secondary reactions play important roles in product distribution, while the physicochemical properties and coke composition of zeolite catalysts are related to their deactivation processes.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Chemistry, Applied
Deepti Mishra, Arindam Modak, Kamal Kishore Pant, Prabhakaran Vanaraja Ambeth, Muxina Konarova, Xiu Song Zhao
Summary: The promotional effect of mixed ceria-zirconia oxides (CZO) on the Mo/HZSM-5 catalyst for methane dehydroaromatization (MDA) reaction was studied. The surface and structural properties of the synthesized catalyst were thoroughly characterized, and the correlation between catalytic properties and MDA reaction performance was discussed. The impregnation of CZO solid solution on Mo/HZSM-5 improved the catalytic performance and benzene production rate, while reducing coke formation. The redox properties of CZO-deposited Mo/HZSM-5, acting as a selective oxygen supplier and performing hydrogen combustion, were identified as the main reasons for the enhanced catalytic activity.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Review
Chemistry, Physical
Mark McConnachie, Muxina Konarova, Simon Smart
Summary: This review summarizes recent developments and future perspectives in COx-free hydrogen production through methane pyrolysis. It discusses in detail the thermal and catalytic cracking of methane into hydrogen and carbon. Various types of solid and liquid catalysts are reviewed in terms of their performance in hydrogen selectivity, methane conversion, and deactivation. Although some pilot-scale technologies have been discussed, large-scale industrialization is hindered by challenges such as rapid solid catalyst deactivation, low-priced carbon by-product of molten catalysts, harsh reactor material conditions, and the performance of stable molten catalysts. For catalytic methane cracking in molten catalysts (salt or metal), significant advancements in catalyst development, product separation, and reactor design are still needed to commercialize methane pyrolysis for hydrogen production. To provide guidance for future research, this review specifically focuses on catalyst design, recent developments in molten salt-based methane cracking, and reactor and process design.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Naif Raja, Gloria M. Monsalve-Bravo, Yusuf Valentino Kaneti, Jim Mensah, Karen Wilson, Adam F. Lee, Muxina Konarova
Summary: Thermal pyrolysis of organic components in municipal solid waste (MSW) offers a scalable route to liquid fuels, but requires deep insight into thermochemistry and kinetics. This study investigates the (catalytic) pyrolysis of a model MSW feedstock using thermogravimetric analysis (TGA) and kinetic modeling. Catalytic pyrolysis is sensitive to the catalyst:feedstock mass ratio, and selecting the appropriate heating rate is crucial for catalyst selection and process optimization.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Hayder A. Alrazen, Saiied M. Aminossadati, Hussein A. Mahmood, M. M. Hasan, G. Abdulkreem-Alsultan, Muxina Konarova
Summary: This study investigated the potential use of plastic waste as an alternative fuel by depolymerizing low-density polyethylene (LDPE) using diesel and co-solvents. The addition of co-solvents, such as pinene and xylene, increased the heat release rate and reduced emissions of carbon monoxide, unburnt hydrocarbon, and soot. The results suggest that plastic waste, when processed with suitable co-solvents, could be a viable alternative fuel.
Article
Energy & Fuels
Hayder A. Alrazen, Saiied M. Aminossadati, Md Mahmudul Hasan, Muxina Konarova
Summary: Plastic pollution is increasing and becoming a global challenge in waste management. Our recent research has successfully reported the possibility of converting plastic waste into fuel at low temperatures. However, low recycling ratio and high fuel viscosity are the main limitations. This research focuses on improving the depolymerization process of LDPE in diesel by introducing different amounts of co-solvents.
Article
Chemistry, Multidisciplinary
Alister Sheil, Muxina Konarova, Simon Smart
Summary: Methane pyrolysis using a catalytic molten salt bubble column shows promise in producing high quantities of hydrogen while reducing reactor temperature and generating a separable solid carbon byproduct. The Lewis acidity of the transition metal cation plays a significant role in hydrogen production, with CrCl2 demonstrating the highest activity. Low-cost salts like MgCl2 and CaCl(2) also exhibit moderate catalytic activity, which improves with increasing concentration in the molten solution. Understanding the properties of good catalysts offers insights into designing molten salt systems for large-scale pyrolysis.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Deepti Mishra, Sonit Balyan, Xiu Song Zhao, Muxina Konarova, K. K. Pant
Summary: The catalytic activity of Mo-doped HZSM-5 in methane dehydroaromatization (MDA) is influenced by the state/distribution of initially dispersed Mo-oxide on the zeolite surface. Two different forms of Mo oxide precursors were synthesized to study their effect on catalytic activity. Microwave-assisted impregnation method was used to improve dispersibility, and the features of resulting Mo-containing HZSM-5 catalysts were explored. The MoH2-4M catalyst prepared by MW-impregnated h-MoO3 showed higher benzene formation rate and enhanced resistance to the formation of polyaromatics/hard coke.
REACTION CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Mohamed H. M. Ahmed, Nuno Batalha, Mohammad Rezaul Karim, Ibrahim Abdullah Alnaser, Yusuke Yamauchi, Yusuf Valentino Kaneti, Muxina Konarova
Summary: The use of a trifunctional catalyst in the upgrading of bio-oil can reduce carbon losses and increase oil yield. The trifunctional catalyst developed in this study combines acidity, basicity, and reducibility to promote C-C coupling and deoxygenation reactions. The catalyst showed a significant increase in oil yield and selectivity towards alkenes and alkanes, as well as an apparent shift in the carbon number of oxygenates towards the fuel range.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Hons Wyn, Muxina Konarova, Sebastian Quintero Olaya, Luis Yerman
Summary: This study examines the catalytic effects of ZrO2/CeO2 mixed oxides on product gases produced through self-sustaining smouldering combustion of lignocellulosic biomass. A series of smouldering experiments were conducted to investigate the impact of airflow rates and moisture content. The addition of ZrO2/CeO2 mixed oxides improved the H-2 concentration but reduced CH4, suggesting promotion of dry reforming reactions and lower smouldering temperatures without improving the higher heating value (HHV) of the product gases.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Engineering, Environmental
Luqman Atanda, Gabriel Luiz Lopes Fraga, Mohamed H. M. Ahmed, Zeid A. Alothman, Jongbeom Na, Nuno Batalha, Waqas Aslam, Muxina Konarova
Summary: In this study, a range of spinel oxide based catalysts were synthesized for removing oxygen from biocrude during catalytic fast pyrolysis. While all tested spinel oxides were effective in deoxygenating pyrolysis vapor, MgCr2O4 showed the highest efficiency in terms of oxygen removal relative to the quantity of bio oil produced.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Md A. Wahab, Jickson Joseph, Luqman Atanda, Ummul K. Sultana, Jorge N. Beltramini, Kostya Ostrikov, Geoffrey Will, Anthony P. O'Mullane, Ahmed Abdala
ACS APPLIED ENERGY MATERIALS
(2020)
Article
Chemistry, Physical
Zi-Ye Liu, Qian-Yu Wang, Ji-Ming Hu
Summary: In this study, a layered carbon dot composite catalyst (NiFe LDH@CDs) was prepared using a one-step coprecipitation method, without the need for heating or hydrothermal treatment. The CD-functionalized catalyst facilitated rapid charge transfer and accelerated the oxygen evolution reaction. Additionally, the heterojunction structure formed between NiFe LDH and CDs efficiently suppressed photoelectron-hole recombination.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Rohit Kumar, Ankit Kumar Srivastava, Palaniyappan Nagarasu, Vedichi Madhu, Ekambaram Balaraman
Summary: We designed and synthesized a NN-CoII bidentate complex and used it for the amination of alcohols under mild and solventless conditions. The complex exhibited good reactivity towards both primary and sterically hindered secondary alcohols, providing high yields of amines. The pyrazole moiety in the ligand played a crucial role in the reaction. Furthermore, we demonstrated the reusability of the complex as a homogeneous cobalt catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Shivanand Chettri, Liang-Ting Wu, Sagarmani Rasaily, Debesh Sharma, Bikram Gurung, Rajani Dewan, Sudarsan Tamang, Jyh-Chiang Jiang, Anand Pariyar
Summary: Replicating the enzymatic surface microenvironment in vitro is challenging, but constructing an analogous model could facilitate our understanding of surface effects and aid in developing an efficient bioinspired catalytic system. In this study, five unique Cu2O morphologies were generated, and the surface morphology variations were found to be a consequence of differences in the exposure of low-index facets. The reactivity of Cu2O was found to be influenced by the proportion of {110} planes, with r-Cu2O exhibiting the highest reactivity.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Yong Tang, Jianhao Qiu, Dingliang Dai, Guanglu Xia, Lu Zhang, Jianfeng Yao
Summary: Defect engineering has been shown to improve the photocatalytic performance. This study investigated the use of defect-rich UiO-66-NH2 wrapped by ZnIn2S4 as a catalyst for photocatalytic H2O2 production. The defects in UiO-66-NH2 enhanced O-2 adsorption and charge separation, leading to higher H2O2 yield. The insights from this work can advance the research in defect engineering of MOFs and photocatalytic H2O2 synthesis.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Ruiyang Qu, Shuxin Mao, Jana Weiss, Vita A. Kondratenko, Evgenii V. Kondratenko, Stephan Bartling, Haifeng Qi, Annette-Enrica Surkus, Kathrin Junge, Matthias Beller
Summary: The hydrogenation of amides, a challenging reaction usually performed at high temperatures, has been achieved under milder conditions using a new Pt-MoOx/TiO2 catalyst. This catalyst system enables the selective hydrogenation of various amides and imides.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Xiaoran Niu, Ao Wang, Lei Tong, Lei Wang, Yuan Kong, Chenliang Su, Hai-Wei Liang
Summary: This study introduces a novel intermetallic PdCu3 catalyst supported on defective nanodiamond-graphene (ND@G), which exhibits high selectivity (95%) and remarkable activity (turnover frequency: 2940 h(-1)), six times higher than that of the commercial Lindlar catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Review
Chemistry, Physical
Zhiyuan Zheng, Yiming Yue, Hongying Zhuo, Qinggang Liu, Yanqiang Huang
Summary: This review presents the recent research advances on single-atom catalysis for deep reduction of CO2. Detailed introductions and summaries were classified into three categories based on proton-coupled multi-electron transfer approaches: strengthening metal-support interaction, rational design and regulation of coordination environment, and development of SACs with multi-atom active sites. The challenges and future research directions in the field of SACs for CO2 reduction are also proposed.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Shiv Kumar, Paramita Datta, Anup Bhunia, Swadhin K. Mandal
Summary: This article reports a transition-metal-free process for in situ denitrogenation of tosylhydrazones, resulting in the production of various sulfones. The authors used a phenalenyl-based odd alternant hydrocarbon as a photoredox catalyst, which acted as a potent oxidant to facilitate the denitrogenation reaction. The method showed wide functional-group tolerance and high yields, making it suitable for late-stage modification of natural products.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
L. A. Luque-Alvarez, J. Gonzalez-Arias, F. Romero-Sarria, T. R. Reina, L. F. Bobadilla, J. A. Odriozola
Summary: Currently, the production of acetic acid through the carbonylation reaction of methanol has limitations, leading to the exploration of alternative methods using heterogeneous catalysts. This study investigates the methanol carbonylation reaction over a Cu-H-MOR catalyst and proposes a reaction mechanism based on the catalytic behavior and performance of the catalyst. The results provide insights into the reaction mechanism and the involvement of acid and redox centers.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)