Article
Chemistry, Physical
Ha Huu Do, Thanh Duy Cam Ha, Honggil Jo, Kang Min Ok, Jin Hyuk Cho, Sang Hyun Ahn, Myung-Gil Kim, Soo Young Kim
Summary: In this work, a one-step approach for synthesizing molybdenum sulfides and tungsten sulfides was reported. The MoSx-100 degrees C exhibited the highest catalytic activity, while WS2 could produce hydrogen at 400 degrees C. A graphene oxide/MoSx-100 degrees C sample showed good stability and high performance in hydrogen production.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Kaixun Li, Dongmei Feng, Yun Tong
Summary: This paper presents a novel hybrid electrocatalyst designed for overall water splitting, which exhibits superior bifunctional performance by engineering the electronic structure and surface properties of the material. The catalyst showed low overpotentials for hydrogen and oxygen evolution reactions at a high current density, and the water electrolyzer based on this catalyst achieved a small potential for a high current density. These results indicate the promising application potential of this electrode for hydrogen generation.
Article
Chemistry, Multidisciplinary
Mohammad Sadegh Shakeri, Zaneta Swiatkowska-Warkocka, Oliwia Polit, Tatiana Itina, Alexey Maximenko, Joanna Depciuch, Jacek Gurgul, Marzena Mitura-Nowak, Marcin Perzanowski, Andrzej Dziedzic, Jaroslaw Necki
Summary: The study investigates the bond breaking/formation of copper or copper (II) interfaces with ethanol during pulsed laser irradiation to synthesize Cu-CuO-Cu2O applicable as an electrocatalyst in ethanol oxidation fuel cells. The exponential and logarithmic changes in the content of heterostructures for the CuO-ethanol and Cu-ethanol samples irradiated with different fluences are interpreted as the dominant role of physical and chemical reactions, respectively, during the process.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Mohammad Sadegh Shakeri, Zaneta Swiatkowska-Warkocka, Oliwia Polit, Tatiana Itina, Alexey Maximenko, Joanna Depciuch, Jacek Gurgul, Marzena Mitura-Nowak, Marcin Perzanowski, Andrzej Dziedzic, Jaroslaw Necki
Summary: Phase formation by pulsed laser irradiation of suspended nanoparticles has been studied for its potential application as an electrocatalyst in ethanol oxidation fuel cells. The authors analyze the bond breaking/formation process during the absorption of laser pulses and discuss the interaction between nano-laser pulses and suspension for practical control of the synthesis process. The study provides insights into the dominant role of physical and chemical reactions in the formation of heterostructures.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Optics
Q. A. Drmosh, Ibrahim Olanrewaju Alade, Khaled Alkanad, Gubran Alnaggar, Abuzar Khan, Mohd Yusuf Khan, Khaled A. Elsayed, Abdullah A. Manda, Mohammad Kamal Hossain
Summary: Fast recombination of charge carriers is a fundamental challenge in particulate photocatalysis, but can be mitigated by constructing heterojunction nanocomposites. In this study, a WO3/BP/g-C3N4 heterojunction catalyst was fabricated and exhibited significantly increased hydrogen production rate compared to other photocatalysts. The enhancement can be attributed to the increased UV-visible light absorption and improved charge separation.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Jing Fang, Xingyue Qian, Jiawei Xia, Bingji Huang, Guangyu He, Zhenli Zhang, Haiqun Chen
Summary: In this study, a self-supported Ni3S2/NiMo2S4-POM/NF hybrid heterostructure was synthesized via a scalable hydrothermal method and vulcanization treatment. The obtained heterostructure exhibited significant electrocatalytic activity and stability for both hydrogen and oxygen evolution reactions, making it a promising candidate for electrocatalytic water splitting.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
Zhenxing Yang, Cuihong Chen, Bo Li, Yufeng Zheng, Xiangmei Liu, Jie Shen, Yu Zhang, Shuilin Wu
Summary: By constructing a core-shell interface electric field and enhancing oxygen adsorption ability, MoS2@PBMOF can generate high temperature and abundant ROS under light irradiation to kill bacteria, while promoting the healing of damaged tissues.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
Qingtao Wang, Fangfang Mi, Jian Li, Yanxia Wu, Xiaozhong Zhou, Guofu Ma, Shufang Ren
Summary: In this study, a facile tungsten doping method was used to regulate the crystal structure of MoxC, forming a Mo2C-MoC heterostructure, which enhanced the catalytic activity of hydrogen evolution reaction in alkaline solution. The carbon matrix protected the active sites, providing good stability and conductivity for W-MoxC/C.
ELECTROCHIMICA ACTA
(2021)
Article
Materials Science, Multidisciplinary
Jakub Holovsky, Eva Horynova, Lukas Horak, Katarina Ridzonova, Zdenek Remes, Lucie Landova, Rupendra Kumar Sharma
Summary: Molybdenum oxide is a material with high bandgap, work function, and other interesting properties. Using Pulsed Laser Deposition, researchers were able to deposit high transparency MoO3 layers from stoichiometric MoO3 and metal Mo targets at different temperatures and oxygen pressures. Optical properties were accurately tracked using Photothermal Deflection Spectroscopy and Spectral Ellipsometry, while crystallinity and surface morphology were monitored using X-ray diffraction and Scanning Electron Microscopy. Increasing temperature led to smoother, denser layers, narrowing bandgap, and increased sub-gap absorption, with crystallization occurring above 400 degrees C. Sub-gap absorption around 1000 nm depended on temperature and weakly on oxygen pressure.
Article
Chemistry, Applied
Habeebllah Oladipo, Ahmed Yusuf, Samar Al Jitan, Giovanni Palmisano
Summary: This article reviews studies on the photolytic and photocatalytic splitting of H2S to generate hydrogen, comparing the economic potential and kinetics of gaseous and aqueous phase reactions. Higher efficiency has been achieved with MnS photocatalysts compared to CdS. Future work is needed to address challenges such as photo-corrosion in order to advance light-driven H2S splitting for hydrogen production.
Article
Engineering, Environmental
Jiaxin Dang, Mingming Yin, Dianhui Pan, Ziqi Tian, Genman Chen, Jiaqun Zou, He Miao, Qin Wang, Jinliang Yuan
Summary: Developing tri-functional catalysts is significant for zinc-air batteries and water splitting. In this study, a novel metal sulfide heterostructure, INF-FeCuS, was constructed and exhibited superior catalytic performance for the oxygen evolution, oxygen reduction, and hydrogen evolution reactions. INF-FeCuS also showed high ion conversion ability and could be used in alkaline zinc batteries.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Qixian Liu, Jing Ning, Haibin Guo, Maoyang Xia, Boyu Wang, Xin Feng, Dong Wang, Jincheng Zhang, Yue Hao
Summary: This study investigated the application of W-modulated MoSe2/graphene heterostructures in electrochemistry, revealing that W doping enhanced the electrochemical performance of the material, particularly in supercapacitor devices.
Article
Chemistry, Physical
Jun Cai, Yi Xia, Ruiqi Gang, Sufang He, Sridhar Komarneni
Summary: This study demonstrates that tungsten doping can improve the photocatalytic activity of MoS2 by promoting the formation of sulfur defects. The doped MoS2 exhibits high removal efficiency of gaseous mercury and shows good stability, enhanced water and sulfur resistance under light illumination.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Baojun Ma, Yuying Dang, Dekang Li, Xiaoyan Wang, Keying Lin, Wei Wang, Xin Zhou, Yifan Chen, Tengfeng Xie, Xianwen Zhang, Hongxian Han
Summary: A new Yin-Yang hybrid co-catalyst has been proposed for efficient water splitting, showing higher activity compared to traditional spatially separated dual co-catalysts. The superior performance is attributed to the adjacent spatial configuration, extra use of surface excitons, and more favorable water molecular absorption.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Energy & Fuels
Nawal Al Abass, Talal F. Qahtan, Mohammed A. Gondal, Almqdad Bubshait
Summary: Graphitic carbon nitride (GCN) has become significant for large-scale photocatalytic water splitting due to its narrow band gap energy and other advantages. By irradiating a GO/GCN dispersion in methanol aqueous solution using a UV laser, a green and low-cost rGO/GCN colloidal nanocomposite was synthesized, exhibiting improved photoelectrochemical efficiency under visible light illumination.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
V. Fominski, M. Demin, V. Nevolin, D. Fominski, R. Romanov, M. Gritskevich, N. Smirnov
Article
Physics, Atomic, Molecular & Chemical
D. V. Fominski, V. N. Nevolin, V. Yu. Fominski, R. I. Romanov, O. V. Komleva, P. F. Kartsev, G. V. Golubkov
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B
(2020)
Article
Materials Science, Multidisciplinary
V. Yu Fominski, R. Romanov, I. S. Vasil'evskii, D. A. Safonov, A. A. Soloviev, A. A. Ivanov, P. Zinin, S. Yu Krasnoborodko, Yu E. Vysokikh, V. P. Filonenko
Summary: The study investigated the impact of pulsed laser annealing on thin films made of boron and carbon atoms. The process led to the stratification of the films and the formation of a multi-phase structure involving g-BCx and B-doped GO/rGO. The preferential oxidation of boron and the incorporation of new chemical bonds were observed in the B-C-O system.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Roman Romanov, Vyacheslav Fominski, Maxim Demin, Dmitry Fominski, Oxana Rubinkovskaya, Sergey Novikov, Valentin Volkov, Natalia Doroshina
Summary: Research has shown that the MoSx/WSe2 heterostructure formed by pulsed laser deposition on a dielectric substrate can be used for effective solar water splitting to produce hydrogen, with the formation conditions of the WSe2 film and the separation of electrons and holes playing crucial roles in the reaction.
Article
Chemistry, Multidisciplinary
Vyacheslav Fominski, Maxim Demin, Dmitry Fominski, Roman Romanov, Oxana Rubinkovskaya, Petr Shvets, Aleksandr Goikhman
Summary: Pulsed laser deposition of nanostructured molybdenum sulfide films improves their electrocatalytic properties in hydrogen evolution reaction (HER). The formation of Mo nanoparticles during laser ablation synergistically enhances the catalytic performance of amorphous a-MoSx (2 <= x <= 3) matrix. This study investigates the potential of using a-MoSx/NP-Mo films (4 and 20 nm thickness) with a p-Si cathode for photo-stimulated hydrogen production. The results show that a-MoSx/NP-Mo//n(+)p-Si photocathode achieves photo-HER according to a Z-scheme, with a stable interfacial SiOy(P) nanolayer and high long-term durability.
Article
Materials Science, Multidisciplinary
V. N. Nevolin, R. I. Romanov, D. V. Fominski, O. V. Rubinkovskaya, V. Yu. Fominski
Summary: The influence of sulfur and oxygen concentrations on the formation of chemical bonds in films based on the ternary Mo-S-O compound is investigated for the development of efficient thin-film catalysts in electrochemical and photoactivated water splitting reactions. The position of the Fermi level in the band gap of the compound, which plays a crucial role in determining the components of hybrid and heterostructures for photoelectrodes, is found to be greatly affected by certain factors. The local packing of atoms in the Mo-S-O films is observed to change during the electrochemical process of hydrogen production in an acidic solution.
INORGANIC MATERIALS-APPLIED RESEARCH
(2022)
Article
Chemistry, Physical
Roman I. Romanov, Dmitry V. Fominski, Maxim V. Demin, Mariya D. Gritskevich, Natalia V. Doroshina, Valentyn S. Volkov, Vyacheslav Yu. Fominski
Summary: This study investigates the influence of g-C and Ni interface layers on the tribological properties of thin WS2 films. The results show that the application of g-C and Ni films significantly reduces the friction coefficient of WS2 films, approaching superlubricity. These findings provide a new strategy for designing antifriction coatings for practical applications and highlight the ample opportunities of laser techniques in the formation of promising thin-film coatings.
Article
Chemistry, Multidisciplinary
Vyacheslav Fominski, Dmitry Fominski, Maxim Demin, Roman Romanov, Alexander Goikhman
Summary: A laser-based method was developed to produce nanocomposite coatings consisting of a WSexSy matrix and NP-W nanoparticles. Sulfur doping improved the tribological properties of the coatings, with the lowest coefficient of friction and high wear resistance observed in a N-2 environment at an increased load. The incorporation of nanoparticles and changes in the matrix composition and structure contributed to the formation of a tribofilm.
Article
Chemistry, Physical
Weibo Zhang, Qiuyue Xu, Xiaoqiu Tang, Hualin Jiang, Jinwen Shi, Vyacheslav Fominski, Yingchen Bai, Pinghua Chen, Jianping Zou
Summary: Photocatalytic H-2 evolution is crucial in addressing the energy crisis and reducing environmental pollution. Constructing an S-scheme heterojunction is a promising approach, but using a single semiconductor as a photocatalyst is challenging. In this study, CdS nanoparticles were loaded onto NiS nanosheets to form CdS/NiS nanocomposites. The formation of a built-in electric field in the nanocomposite, due to the differences in Fermi energy levels between CdS and NiS, was found to accelerate the effective separation of photogenerated carriers, leading to efficient photocatalytic hydrogen evolution. The optimized photocatalyst exhibited a hydrogen evolution rate that is 6.69 times higher than that of CdS under visible light. This research provides a novel strategy for constructing effective photocatalysts to tackle the environmental and energy crisis.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Physics, Nuclear
D. V. Fominski, R. I. Romanov, O. V. Rubinkovskaya, V. N. Nevolin, V. Yu. Fominski
Summary: This study investigates the efficiency of photoactivated hydrogen evolution in an acidic solution on a p-Si cathode with a thin film of amorphous molybdenum sulfide catalyst. The method of formation of the catalyst film significantly affects the quality of the photocathode. The highest photocurrents are achieved with the traditional method of pulsed laser deposition from an MoS2 target, while varying the conditions of reactive pulsed laser deposition from a Mo target in hydrogen sulfide did not result in high efficiency of hydrogen production. Possible reasons for the difference in the functional characteristics of the created photocathodes are revealed.
PHYSICS OF ATOMIC NUCLEI
(2022)
Article
Physics, Nuclear
R. I. Romanov, D. V. Fominskii, V. A. Kas'yanenko, M. D. Gritskevich, V. Yu. Fominskii
Summary: Thin-film coatings with laminar WS2 films and nanometer-thick carbon films were created using reactive pulsed laser deposition. The growth of the graphite-like state was activated by depositing carbon films (g-C) on the surface of nickel or titanium films between WS2 and g-C layers. It was found that the WS2/Ni/g-C/WS2 coating exhibited a very low coefficient of friction (less than 0.013) in dry air without lubrication, while the coating with a titanium interface film did not possess such properties. The structural state of the coating before and after the tribotest was monitored using micro-Raman spectroscopy (MRS), and possible causes for the different behavior of the coatings with the chosen metal film catalysts were revealed.
PHYSICS OF ATOMIC NUCLEI
(2022)
Article
Engineering, Environmental
Pinghua Chen, Songyuan Li, Xiaoqiu Tang, Huitao Zheng, Jinwen Shi, Linyuan Wen, Yong Xu, Vyacheslav Fominski, Hualin Jiang
Summary: The combination of ZIF-8 and g-C3N4 is found to convert the photo-inactive ZIF-8 into active and enhance the photocatalytic performance for H-2 production. Experimental results and theoretical calculations suggest a built-in electric field at the interface of g-C3N4 and ZIF-8, which promotes the directional transfer of photo-induced electrons and boosts the catalytic ability. Hence, the construction of a built-in electric field is considered an effective strategy to synthesize robust photocatalysts.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
V. N. Nevolin, D. Fominski, R. Romanov, O. Rubinkovskaya, A. A. Soloviev, P. Shvets, E. A. Maznitsyna, V. Yu Fominski
Summary: The thermochemical treatment of tungsten trioxide nanostructured films in hydrogen sulfide to obtain tungsten disulfide layers in the WS2/WO3 hybrid structure is studied, with the temperature and treatment time influencing the photoelectrocatalytic activity. Sulfidation of WO3 nanoneedle films leads to the formation of a WS2/WO3 nanocrystalline hybrid structure under optimal conditions, providing efficient separation of photogenerated carriers for hydrogen evolution reaction. Calculations of thermodynamic properties suggest a synergistic effect of nanophases in the WS2/WO3 hybrid nanocatalyst to increase catalytic activity on both WS2 nanoclusters and metal oxide nanoclusters.
INORGANIC MATERIALS-APPLIED RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
V. N. Nevolin, R. I. Romanov, D. V. Fominski, O. V. Rubinkovskaya, A. A. Soloviev, V. Yu. Fominski
Summary: The chemical state of a WOy thin-film precursor significantly affects the morphology of WSe2 nanofilms and the efficiency of hydrogen evolution in the MoS3/WSe2 heterostructure during photoactivated water splitting. The interaction at the MoS3/WSe2 interface can increase the hydrogen evolution efficiency by enhancing the reaction on surface regions of WSe2 nanocrystals with different atomic packing.
INORGANIC MATERIALS-APPLIED RESEARCH
(2021)
