Article
Materials Science, Multidisciplinary
Rui-Hua Zhang, Zhen-Hua Hao, Lin-Yuan Shi, Hao-Tian Chen, Yong-Chun Shu, Ji-Lin He
Summary: The study demonstrates that increase in reaction temperature and decrease in distance between activated carbon and MoO3 promote the reduction of MoO3 to MoO2. MoO3 is first decomposed into platelet-shaped MoOx, which then transforms into needle-like or irregular platelet-like Mo4O11, eventually forming MoO2 powders.
Article
Materials Science, Multidisciplinary
Yusuf Tutel, Mete Batuhan Durukan, Serife O. Hacioglu, Umran Ceren Baskose, Levent Toppare, Husnu Emrah Unalan
Summary: This study demonstrates the use of ultrasonic spray deposition method to prepare bare MoO3 and cobalt-doped MoO3 thin films for electrochromic (EC) applications. Cobalt doping significantly improves the cyclic stability of the films. Moreover, MoO3:Co films show excellent performance in dual-band electrochromic devices with high capacitance retention and transmittance change.
APPLIED MATERIALS TODAY
(2023)
Article
Nanoscience & Nanotechnology
Qingting Zhang, Andreas Goldbach, Na Ta, Wenjie Shen
Summary: This study explores the selective oxidation of propylene using a composite material of molybdates and silver nanoparticles. The results show that the composite material exhibits high selectivity for propylene conversion to acrolein at 350 degrees C, with complete inhibition of propylene oxide formation. The reaction kinetics of the composite material are consistent with the Mars-van Krevelen mechanism.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Ceramics
Kaiyuan Wei, Jinxu Qiu, Yu Zhao, Shiping Ma, Yicheng Wei, Hongliang Li, Chao Zeng, Yanhua Cui
Summary: This study proposes a strategy to enhance the electrochemical performance and pseudocapacitance contribution of lithium molybdate as a cathode material for lithium-ion batteries by adjusting oxygen partial pressures and increasing the oxygen vacancies concentration through pulsed laser deposition. The introduction of oxygen vacancies improves Li+ ion diffusion and electrical conductivity, leading to a remarkable increase in Li-ion diffusion coefficient and specific capacity.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
M. Burgstaller, H. Lund, M. O'Sullivan, H. Huppertz
Summary: The effect of potassium content on the hydrogen reduction of molybdenum trioxide to molybdenum dioxide was studied. It was found that increasing potassium content leads to a decrease in reduction rate, an increase in the fractional content of gamma-Mo4O11 during the reduction process, and an increase in grain size of the resulting MoO2 powder.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Engineering, Environmental
Hengxing Peng, Kailing Zhou, Yuhong Jin, Qianqian Zhang, Jingbing Liu, Hao Wang
Summary: By constructing MoO3-Co(OH)(2)@Ag NWs catalysts, this study successfully improved the efficiency of hydrogen production in electrochemical water electrolysis process, demonstrating the good stability and catalytic performance of the catalyst at high current density.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Kyeong-Ho Kim, Daehyeon Hong, Myeong Gyu Kim, Wooseon Choi, Taewon Min, Young-Min Kim, Yun-Hyuk Choi
Summary: This study finds that the intrinsic oxygen evolution reaction (OER) activity of orthorhombic MoO3 can be significantly improved by incorporating lithium ions (Li+), which enhances electron carrier density and electrical conductivity, thus improving interfacial charge transfer kinetics and activating a large number of effective electrochemical surface areas (ECSA). By depositing a-MoO3 nanoparticles on a carbon fiber paper (a-MoO3/CFP) and subsequently applying a lithiation process, a lithiated a-MoO3/CFP (Li-a-MoO3/CFP) electrode with a robust overpotential of 458 mV for OER is prepared.
ACS MATERIALS LETTERS
(2023)
Article
Chemistry, Physical
Sohaila Z. Noby, Ankita Mohanty, Peymen Zirak, Ananthakumar Ramadoss, Lukas Schmidt-Mende
Summary: This study reports the preparation of binder-free carbon coated vertically aligned α-MoO3 electrode through posttreatment in reduced gas environments. The vacuum treated α-MoO3 electrode exhibited the highest specific capacitance and maintained a stable electrochemical performance. The proposed hybrid synthesis approach shows great promise for high-performance supercapacitors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Michael Zoller, Michael O'Sullivan, Hubert Huppertz
Summary: This study examined the impact of parameters such as reduction temperature, water influx, and potassium content on the hydrogen reduction of the first step in the production of molybdenum dioxide, utilizing a chemical vapor transport mechanism to obtain phase pure MoO2. It was found that the specific surface areas of molybdenum dioxide and the morphology of the grains could be modulated during the process.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Physical
M. Spankova, M. Sojkova, E. Dobrocka, P. Hutar, M. Bodik, F. Munnik, M. Hulman, S. Chromik
Summary: The study investigates the preparation of MoS2 thin films using MoO3 layers deposited with different techniques, finding that the quality of MoS2 is strongly influenced by the properties of the precursor MoO3 layers. A comparison of two types of MoS2 films prepared from different MoO3 layers identifies the most suitable MoO3 layer properties for high-quality MoS2 films in future applications.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Ji Young Son, Su Han Kim, Ji Min Seo, Jongsun Lim, Taek-Mo Chung, Bo Keun Park
Summary: To replace corrosive halogen ligands, we synthesized novel tungsten complexes with amido ligands, W-(DMEDA)(3) (1) and W-(DEEDA)(3) (2) (DMEDA= N,N '-dimethylethylenediamido; DEEDA = N,N '-diethylethylenediamido). Complexes 1 and 2 were characterized and their thermal properties were analyzed. The WS2 deposition test was performed using 1 in thermal chemical vapor deposition (thermal CVD), and the surface of the thin films was further analyzed.
Article
Chemistry, Physical
Ashin Shaji, Karol Vegso, Michaela Sojkova, Martin Hulman, Peter Nadazdy, Yuriy Halahovets, Lenka Pribusova Slusna, Tatiana Vojtekova, Jana Hrda, Matej Jergel, Eva Majkova, Joerg Wiesmann, Peter Siffalovic
Summary: This study provides a comprehensive in-situ investigation of the chemical reactions during the growth of MoS2 thin film using chemical vapor deposition (CVD). The results demonstrate the phase transformations of MoO3 to MoO2 and MoO2 to MoS2, highlighting the importance of understanding these chemical reactions for optimizing the properties of the final 2D TMD films.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Divya Dixit, B. Ramachandran, M. Chitra, K. Madhuri, G. Mangamma
Summary: The photochromic performance of PLD-grown nanostructured MoO3 thin film was studied, showing a shift in Raman peak frequency with increasing LASER power due to coloration process. The Raman spectra characterized strong peaks at 819 and 994 cm-1, attributed to O-Mo6+-O and Mo6+-O bonds vibrations respectively, with the peak at 994 cm-1 associated with terminal oxygen stretching mode for orthorhombic MoO3. This study also revealed enhanced photochromic response of MoO3 nanostructures under LASER excitation, demonstrating a transition from Mo6+ to Mo5+ states and subsequent coloration.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Yihan Chen, Jinwei Chen, Jie Zhang, Yan Luo, Chenyang Zhang, Yali Xue, Gang Wang, Ruilin Wang
Summary: A Pt-MoO3/CNT-ALD catalyst with Pt nanoparticles supported on MoO3-modified carbon nanotubes via ALD technology shows significant improvements in catalytic activity and durability. The catalyst exhibits high activity for methanol oxidation and oxygen reduction reactions, along with excellent long-term stability. The enhanced performance is attributed to increased Pt-O bonds, optimized electronic structure, and strengthened MMOI.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Tihomir Car, Ivan Jakovac, Ivana Saric, Sigrid Bernstorff, Maja Micetic
Summary: The structural, optical, and electrical properties of Al+MoO3 and Au+MoO3 thin films prepared by simultaneous magnetron sputtering deposition were investigated. The influence of MoO3 sputtering power on the formation and distribution of Al and Au nanoparticles was explored. The films show different optical and electrical characteristics depending on the choice of incorporated material and its volume percentage in the MoO3 matrix.
