Article
Chemistry, Multidisciplinary
Jiajia Ran, Leonardo Girardi, Goran Drazic, Zhanhua Wang, Stefano Agnoli, Hesheng Xia, Gaetano Granozzi
Summary: This study presents a simple and scalable method to prepare efficient and stable electrocatalysts for green H-2 production. The MoS2 nanoparticles embedded in 3D partially reduced graphene oxide aerogel microspheres (MoS2/prGOAMs) exhibit remarkable electrocatalytic activity. The introduction of Ni atoms further enhances the catalytic performance and creates a bifunctional catalyst.
Article
Chemistry, Physical
Kuo Cao, Shiwei Sun, Aiying Song, Jinxiao Ba, Haowen Lin, Xianghai Yu, Chengqun Xu, Bingjun Jin, Jan Huang, Donghua Fan
Summary: A new strategy was developed to prepare MoS2 @CoS2/G electrocatalysts with high-percentage metallic 1T-MoS2 phase, which exhibited excellent catalytic activity and stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Dohyun Rhuy, Youjin Lee, Ji Yoon Kim, Chansoo Kim, Yongwoo Kwon, Daniel J. Preston, In Soo Kim, Teri W. Odom, Kibum Kang, Dongwook Lee, Won-Kyu Lee
Summary: This paper presents an approach to develop ultra-efficient catalysts for the hydrogen evolution reaction (HER) using low-cost, bulk multilayer MoS2. By transferring MoS2 flakes to gold thin films and inducing a local phase transition through surface wrinkles, the authors achieved HER activity comparable to platinum. The superior performance was attributed to the combined effect of the phase transition and improved charge transfer resistance through desulfurization.
Article
Chemistry, Physical
Wei Jia, Xu Wang, Zhenjiang Lu, Yafei Wu, Rui Sheng, Jing Lv
Summary: The activity of MoS2 in hydrogen evolution reaction is influenced by different sulfur configurations and phases, with metallic 1T phase and bridging S22- as favorable factors. A simple hydrazine hydrate-assisted method was used to synthesize sulfur-rich MoS2, showing improved electrocatalytic performance. This research provides new insights for enhancing the electrocatalytic activity of MoS2 through a straightforward approach.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Shihao Wang, Longlu Wang, Lingbin Xie, Weiwei Zhao, Xia Liu, Zechao Zhuang, YanLing Zhuang, Jing Chen, Shujuan Liu, Qiang Zhao
Summary: Defect engineering is an effective strategy to optimize the catalytic performance of MoS2 by introducing dislocations. This study successfully synthesized numerous dislocation-strained structures in MoS2 nanosheets through low-temperature hydrothermal synthesis. The high-density dislocations and corresponding strain field resulted in superior catalytic activity under visible light. This work provides a new pathway for improving the catalytic activity of MoS2 through dislocation-strained synergistic modulation.
Article
Chemistry, Physical
Yanqiang Li, Chao Wang, Ming Cui, Jiabin Xiong, Liwei Mi, Siru Chen
Summary: Developing a low-cost and high-efficiency bifunctional catalyst MoO2@MoS2@Co9S8 is critical for catalyzing electrochemical overall water splitting to produce hydrogen. Utilizing an in-situ reduction and vulcanization strategy, MoO2@MoS2@Co9S8 heterostructure nanorods were prepared with outstanding catalytic performances for both HER and OER. The 2D nanosheet assembled heterostructure nanorods can effectively catalyze water splitting with high stability, demonstrating practical application potential.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Applied
Koki Chida, Takeharu Yoshii, Mao Ohwada, Yuichiro Hayasaka, Joe Komeda, Ryota Sakamoto, Jun Maruyama, Kazuhide Kamiya, Masataka Inoue, Fumito Tani, Hirotomo Nishihara
Summary: Ordered carbonaceous frameworks (OCFs) are carbon materials with three-dimensional ordered structures and regularly-aligned single-atomic metal species. OCFs have well-defined chemical structures like organic-based frameworks, high thermal/chemical stability, and electrical conductivity, making them an interesting platform for electrocatalytic applications. We report two new types of Ni porphyrin precursors that can be converted into OCFs. The structural analysis of resulting OCFs shows regularly immobilized single-atomic Ni sites in the microporous carbon framework. The number of ethynyl moieties affects the microporosity of resulting OCFs, and single-atomic Ni species can catalyze electrochemical hydrogen evolution reaction without any conductive additives.
Article
Chemistry, Physical
Sumaiya Saleem, Muhammad Salman, Salman Ali, Yihan Ling, Majid Khan
Summary: Molybdenum disulfide (MoS2) is a 2D layered structured material attracting great attention for hydrogen production. Nanostructured MoSx with different sulfur concentrations were prepared through a one-step hydrothermal method, leading to the formation of MoO3 with decreasing S content. The optimal performance was observed for Mo:S (1:1), attributed to the sulfur vacancies providing active sites for hydrogen evolution reaction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Menghe Jiang, Yongjin Zou, Fen Xu, Lixian Sun, Zhicong Hu, Sensen Yu, Jian Zhang, Cuili Xiang
Summary: As a typical two-dimensional layered material, MoS2 has attracted extensive attention due to its adjustable electronic structure, abundant reserves, and excellent chemical stability. This study synthesized g-C3N4/Fe3O4/MoS2 composite electrocatalysts by growing MoS2 nanosheets on Fe3O4 sites supported on g-C3N4 substrates. The results showed that Fe3O4 sites facilitated the dispersion of MoS2 nanosheets, leading to high exposure of catalyst active sites, redistribution of surface charge, and optimization of hydrogen adsorption kinetics and stability. Additionally, the electrocatalytic performance of MoS2 for hydrogen evolution reaction was improved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Jianming Liao, Zhenhong Xue, Hai Sun, Fengjuan Xue, Zhenxin Zhao, Xiaoxue Wang, Wei Dong, Daxiang Yang, Ming Nie
Summary: The Er-MOF/MoS2 composite material was synthesized by hydrothermal method and characterized for its morphology and electrocatalytic performance. The results show that Er-MOF/MoS2 exhibits improved conductivity and more exposed active sites, demonstrating excellent hydrogen evolution activity in acidic media.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Huanran Li, Xiaobo Han, Suyu Jiang, Lili Zhang, Wei Ma, Renzhi Ma, Zhen Zhou
Summary: Layered 1T/2H-MoS2 with sodium ion insertion was successfully synthesized via a hydrothermal method. The content of the 1T-phase can be controlled by hydrothermal temperatures. Modified 1T/2H-MoS2 nanospheres with sodium ion insertion showed excellent electrocatalytic performance in the hydrogen evolution reaction.
GREEN ENERGY & ENVIRONMENT
(2022)
Article
Chemistry, Physical
Peiwen Zhao, Xuekai Zhang, Linzheng Ma, Yanfang Sun, Jinxue Guo
Summary: In this study, Fe1Pt3 nanoparticles were dispersed on MoS2 nanosheets to combine noble metal features with highly exposed nanosheets. The Fe1Pt3-MoS2 catalyst exhibited good hydrogen evolution performance in acidic media, making it a high-efficiency HER catalyst with low Pt loading.
Article
Chemistry, Physical
Qirun Wang, Xiaoqiang Du, Xiaoshuang Zhang
Summary: The study focused on the preparation and characterization of NiCoM (M = P, S, Se, O)-Ni3S2-MoS2 hybrid material for electrochemical reactions. The NiCoP-Ni3S2-MoS2 exhibited high activity for the hydrogen evolution reaction, and the NiCoSe-Ni3S2-MoS2 showed excellent performance for the oxygen evolution reaction. The findings provide insights into the development of efficient and cost-effective catalysts for water splitting.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Qinke Wu, Yuting Luo, Ruikuan Xie, Huiyu Nong, Zhengyang Cai, Lei Tang, Junyang Tan, Simin Feng, Shilong Zhao, Qiangmin Yu, Junhao Lin, Guoliang Chai, Bilu Liu
Summary: This study presents a new strategy for the in situ growth of large numbers of 2D heterostructures on centimeter-scale substrates. The resulting heterostructures show improved hydrogen evolution reaction (HER) performance.
Article
Chemistry, Physical
Devesh Chandra Binwal, K. Pramoda, Alla Zak, Manjodh Kaur, Pallellappa Chithaiah, C. N. R. Rao
Summary: Nanocomposites formed by MoS2 nanotubes with P-modified SWCNT and BCNNT through solution-phase flocculation show enhanced photocatalytic and electrocatalytic HER activities. The H2 yield improves with higher proportion of MoS2 nanotubes, with the MoS2-P.SWCNT (3:1) nanocomposite exhibiting the highest H2 evolution rate. Electrostatic stacking of 1D MoS2 nanotubes with SWCNT/BCNNT appears to be an effective strategy for HER and related catalytic reactions.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Hassan Zare Asl, Seyed Mohammad Rozati
Summary: The deposition temperature significantly affects the texture, morphology, and electrical properties of fluorine-doped tin oxide (FTO) thin films. As the temperature increases, the resistivity of the films decreases gradually, while the carrier concentration reaches its peak at 500 degrees C and the electron mobility reaches its lowest value at 550 degrees C.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Mohammad Bagher Askari, Seyed Mohammad Rozati, Parisa Salarizadeh, Sadegh Azizi
Summary: Co3O4-Ni3S4 (CN) and Co3O4-Ni3S4-rGO (CNR) nanohybrids were synthesized and their synergistic effect as supercapacitor electrode materials was investigated. The results showed that CN and CNR materials exhibited high specific capacitance and cyclic stability, making them promising options for cheap and attractive supercapacitor electrodes.
CERAMICS INTERNATIONAL
(2022)
Article
Electrochemistry
Reihane Etefagh, Seyed Mohammad Rozati, Ahmad Ahmadi Daryakenari, Fatemeh Poursalehi, Majid Karami Keshmarzi
Summary: This study investigated the effect of manganese doping on lithium manganese-rich nickel-manganese-cobalt oxides (LMR-NMCs) cathode materials. Li-1.21[Mn0.54-xNi0.125Co0.125]InxO2 materials were prepared using a sol-gel approach, and their structural, chemical, and thermal properties were examined. The experimental results showed that an appropriate indium doping level of x = 0.015 significantly improves the cycling stability and charge/discharge capacity of the electrode.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2022)
Article
Physics, Condensed Matter
Sahar Soltani, Seyed Mohammad Rozati, Mohammad Bagher Askari
Summary: A spinel cubic Co3O4 nanostructured thin film was successfully deposited on a preheated FTO substrate using a simple and inexpensive spray pyrolysis method. The film exhibited small grain size and stable electrochemical properties, showing promising potential for various applications.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
H. Fayaz Rouhi, S. M. Rozati
Summary: In this article, Tellurium doped zinc oxide thin films were prepared using a simple spray pyrolysis technique. The effects of Te doping concentration on the crystal structure, surface morphology, and optical properties of the films were investigated.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Physical
Mohammad Bagher Askari, Seyed Mohammad Rozati
Summary: This study successfully synthesized a three-component nanocatalyst composed of cobalt oxide, nickel sulfide, and reduced graphene oxide, and reported their application in alcohol fuel cells. The addition of reduced graphene oxide increased the specific surface area and electrical conductivity of the nanocatalyst, resulting in improved efficiency in the methanol and ethanol electrooxidation processes. Furthermore, the CNR nanocatalyst exhibited high stability in the oxidation reactions of methanol and ethanol.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Mohammad Bagher Askari, Seyed Mohammad Rozati, Antonio Di Bartolomeo
Summary: In this study, a new nanocatalyst, Mn3O4-CeO2-rGO, was synthesized and evaluated for the methanol oxidation reaction. The results demonstrated that the nanocatalyst exhibited high oxidation current density and stability, making it a promising and efficient catalyst for the methanol oxidation reaction.
Article
Chemistry, Physical
Hassan Zare Asl, Seyed Mohammad Rozati
Summary: CuO:In2O3 nanocomposite thin films were successfully prepared by adding different weight percentages of indium chloride. The addition of In2O3 considerably improved the conductivity and electrochemical performance of the films, but excessive growth of In2O3 could limit ion storage.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Correction
Electrochemistry
Reihane Etefagh, Seyed Mohammad Rozati, Ahmad Ahmadi Daryakenari, Fatemeh Poursalehi, Majid Karami Keshmarzi
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2023)
Review
Materials Science, Multidisciplinary
Seyed Mohammad Rozati, Seyed Ashkan Moghadam Ziabari
Summary: This review investigates various types of single-layer, bilayer and multilayer TCO materials, their optical and electrical properties, deposition techniques, and applications. Manipulation of effective parameters like doping, growth method, and temperature can change the electrical and optical properties of TCO, helping researchers to improve their performance in desired contexts.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Mohammad Bagher Askari, Sadegh Azizi, Mohammad Taghi Tourchi Moghadam, Majid Seifi, Seyed Mohammad Rozati, Antonio Di Bartolomeo
Summary: The demands for alternative energy have driven the research on effective electrocatalysts in fuel cells. This study presents new nanocatalysts based on two binary transition metal oxides and reduced graphene oxide for methanol oxidation. The introduction of reduced graphene oxide significantly improves the electrocatalytic properties of the catalysts. The nanocatalysts exhibit promising performance for methanol fuel cell anodes, with high current density, low overvoltage, and good cyclic stability.
Article
Chemistry, Physical
Hassan Zare Asl, Seyed Mohammad Rozati
Summary: This study investigated the influence of Zn doping on the electrochemical properties of Co3O4 thin films. First, an FTO film was spray-deposited onto a glass substrate. Then, undoped and Zn-doped Co3O4 thin films with different concentrations were spray-deposited onto the FTO film. The areal capacitance and resistance of the prepared cells were analyzed using cyclic voltammetry and Nyquist plot.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Tohid Ganj, Seyed Mohammad Rozati, Yashar Azizian-Kalandaragh, Golamreza Pirgholi-Givi, Semsettin Altindal
Summary: In this paper, cerium-oxide nanostructures were synthesized using the hydrothermal method and fabricated into different types of SBDs to study the effects of organic interlayers on electrical properties and conduction mechanisms. The properties of the nanostructures were analyzed using various characterization methods, and the results showed that the average crystallite size was around 30-40 nm. The presence of the organic interlayer improved the performance of the SBDs by decreasing the surface state energy levels and changing the conduction mechanism.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Physics, Multidisciplinary
Tohid Ganj, S. M. Rozati, Yashar Azizian-Kalandaragh, Gholamreza Pirgholi-Givi
Summary: In this research, Au-PVC-Si (MPS1), Au-(CeO2: PVC)-Si (MPS2) Schottky barrier diodes (SBDs) grown on n-type silicon (n-Si) were studied to investigate the frequency dependence and the effect of polymer interlayer on dielectric parameters. The results showed that the dielectric parameters are sensitive to frequency, especially in the low-frequency range. The presence of the PVC and (PVC: CeO2) interlayer increased the dielectric constant and conductivity compared to MS-type SBDs.
Article
Physics, Condensed Matter
Sahar Soltani, Seyed Mohammad Rozati, Mohammad Bagher Askari
Summary: The effect of Mn doping on the structural, surface morphology, and optical properties of Co3O4 and Mn: Co3O4 thin films were investigated in this study. The results showed that Mn doping changed the surface structure of Co3O4 and significantly affected the optical properties of the films. In addition, increasing the Mn concentration decreased the resistance of the films.
MICRO AND NANOSTRUCTURES
(2022)
