Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 27
·9337-9344
·
IF 7.059
Aili Wang,Lili Zhao,Hui Liu,Ziqian Zhou,Chengbo Li,Yong Xiang,Weijia Zhou,Feng Hao
The development of low-dimensional non-precious metal catalysts for the hydrogen evolution reaction (HER) is highly desired for clean energy utilization. Herein, we have reported a facile synthesis protocol of Cu–Mo–O (CMO) nanowires and nanosheets on Cu foam (CMOW/CF and CMOS/CF) through a one-step reaction of Cu nanowires with (NH4)6Mo7O24 solution directly under mild conditions. The final product morphology has been tuned by mechanical stirring. The as-synthesized CMOS/CF exhibits a low operating overpotential of 112 mV at a current density of 10 mA cm−2 with a high electrochemical active area of 25.1 mF cm−2 and excellent long-term stability in the 1 M KOH electrolyte. Moreover, by using the CMOS/CF as cathodic and anodic electocatalysts, a two-electrode electrolyzer capable of driving 10 mA cm−2 at a cell voltage of 1.69 V was achieved, along with promising stability. The high performance of the CMOS/CF can be attributed to higher electrochemical area and more Mo catalytic sites induced by mechanical stirring. This work provides a facile method for the synthesis and catalytic site regulation through a simple method of low-dimensional nanomaterials for the HER with relatively high electrochemical active area and catalytic activity.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Hongjiao Song,Binbin Hu,Yulong Zhou,Ye Wu,Jibao Wu,Hongsong Tian,Qifeng Liang,Yongsheng Tan,Zebo Fang,Lirui Yu,Huili Li,Shunhang Wei
Interface engineering has been proven to be a promising strategy for regulating carrier transport. Herein, an interfacial Mo–O–W bond was constructed between Bi2MoO6 nanospheres and WO3 quantum dots. It served as a fast transfer channel for interfacial photogenerated carriers, resulting in the formation of a direct Z-scheme heterojunction. The Z-scheme heterojunction not only maximized the redox ability but also exhibited enhanced separation and transfer efficiency of photogenerated carriers. Thereby, it exhibited excellent degradation activity and reusability for different simulated pollutants (levofloxacin, rhodamine B, and methylene blue) under LED irradiation, and its photocatalytic rate is approximately doubled. Unexpectedly, a considerable amount of H2O2 was formed via a direct one-step two-electron oxygen reduction reaction process, which played a significant role in the photodegradation process, even surpassing the role of electrons/holes as active species. Furthermore, the photodegradation pathway of levofloxacin by the Z-scheme heterojunction was analyzed. This study could provide insights into establishing an interfacial chemical bond, modulating charge transfer, and the photodegradation mechanism.
研究领域:
材料科学
·
环境化学
·
光催化
·
纳米材料
·
界面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yu Liu,Lu Han,Jinhao Zhang,Ruxue Yao,Haoqi Zhan,Huawei Yang,Liangjiu Bai,Lixia Yang,Donglei Wei,Wenxiang Wang,Hou Chen
O2 activation for the green conversion of chemicals has attracted a great deal of attentions in the field of chemistry. Developing catalysts for aerobic oxidation with both prominent instinct activity and desirable micro/nanostructure remains a tough challenge. In this work, hierarchical hollow Co–Ni–Mo–O mixed metallic-oxide nanotubes constructed by ultrathin CoMoO4/NiMoO4 nanosheets were fabricated using a sacrificial template method and employed as catalysts in aerobic oxidative desulfurization (AODS) of a model fuel. With air as the oxygen source, the catalyst demonstrated surprisingly high activity by achieving complete conversion of dibenzothiophene under mild reaction conditions. Besides, the catalyst demonstrated excellent stability on continuous repeated use. A further mechanism study reveals the electron coordination and transfer between different metal species as well as the activation route of O2. Based on the above-mentioned results, the catalyst which allows a good exposure of metal centers, a high concentration of oxygen vacancies, and the desired electronic structure is expected to serve as the high-performance AODS catalyst.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Sai-Yu Huang,Qi-Hang Zhou,Ying-Jie Song,Yu-Han Dong,Jia-He Zhang,Jing-Yu Pang,Dong-Bin Dang,Yan Bai
Electronic structure modulation of active sites plays a critical role in oxidation catalysis reactions but remains insufficiently explored in polyoxometalate (POM) systems. Here, we employ Anderson-type polyoxomolybdates (XMo 6 , X = Fe, Co, Ni) as molecular platforms to elucidate how central transition metals regulate the electronic properties and catalytic behavior of Mo=O sites. Through atomic-precision synthesis and heterogenization on ionic liquid-modified h -BN, a series of MMo 6 -C 4 /BN were constructed and enabled precise structure–activity correlation in oxidative desulfurization (ODS). Among them, NiMo 6 -C 4 /BN exhibits the best performance, achieving 100 % DBT removal within 50 min at 60 °C. DFT calculations reveal that the electron-withdrawing Ni center optimally modulates the Mo d-band center, resulting in the most favorable reaction energetics, which fundamentally explains the superior activity. Furthermore, Radical trapping and electron paramagnetic resonance (EPR) measurements identified • OH and • O 2 − as the key reactive species involved in the oxidation process. The catalyst also demonstrated strong practical potential by achieving a 69 % desulfurization rate in real diesel. This work establishes a general strategy for electronic tuning in POM catalysts and provides molecular-level insights into active site engineering for advanced oxidative catalysis.
✓ 已验证
产品关联
DOI
高影响因子
Results in Chemistry
·
2025
·
IF 4.2
Worku Lakew Kebede,Molla Tefera,Amogne Wondu,Melesse Ababay,Abrha Berhe,Mengistu Mulu,Atnafu Guadie
Water contamination caused by textile and industrial dyes is currently among the most important issues facing humanity that require urgent attention. Organic pollutants are harmful and can cause cancer in both humans and aquatic life. Even small amounts of these pollutants in water can lead to grave health problems. One promising way to clean up these pollutants is through degradation, using oxysulfide-based photocatalysts. These materials are effective because of their advanced optical and structural properties. The Sn-Mo(O,S) 3 catalysts were prepared through an easy precipitation process conducted at low temperatures. Different techniques were used to examine the catalyst's shape, structure, electrical properties, chemical makeup, and how it interacts with light. The Sn-Mo(O,S) 3 oxy-sulfide nanoparticle was successfully used to break down organic pollutants through photocatalytic processes. Among the samples made, the SMOS-25 catalyst showed the best performance in breaking down methylene blue dye. The effectiveness of the SMOS-25 catalyst was tested by seeing how well they could break down organic dye pollutant when exposed to visible light. The SMOS-25 nanoparticle was able to remove 98.9 % MB dye from water within 105 min under visible light. In this system, the main substance responsible for breaking down the dye is hydroxyl radical ( • OH).
研究领域:
环境科学
·
材料化学
·
光催化
·
纳米技术
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Worku Lakew Kebede,Dong-Hau Kuo,Misganaw Alemu Zeleke,Kedir Ebrahim Ahmed
Environmentally toxic methylene blue organic pollutants are of more concerns due to their antagonistic effects on human health, animals, and plants, thus needs serious attention for their removal. For elimination purpose, the Sb-doped Mo(O,S) 3 oxy-sulfide nanoplate catalyst with different Sb contents was synthesized at low temperature of 95 °C via a facile method. The structural, morphological, chemical composition, optical properties , and electrical conductivity of the catalyst were characterized with different techniques. The photocatalytic performance of Sb-Mo(O,S) 3 at various Sb contents was investigated for the degradation of methylene blue dye under visible light irradiation using hydrogen peroxide as an effective electron scavenger to further accelerate the reaction. It was observed that the incorporation of Sb enhanced the catalytic activity. Sb-Mo(O,S) 3 -10 was the most efficient catalyst with excellent activity to degrade 99.7% of the dye within 60 min irradiation time. The degradation kinetics follows a pseudo-first-order reaction with a rate constant 8.78 × 10 −2 min −1 , which is 3-fold higher than that for Sb- Mo(O,S) 3 -0 catalyst. Sb-Mo(O,S) 3 -10 showed slower recombination of photogenerated charge carriers and lower charge transfer resistance which proved to be capable for the removal of toxic methylene blue organic pollutant.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Progress in Natural Science-Materials International
·
2021
·
IF 3.607
Hairus Abdullah,Chi-Ning Hsu,Hardy Shuwanto,Noto Susanto Gultom,Worku Lakew Kebede,Chang-Mou Wu,Chiu-Chun Lai,Ri-Ichi Murakami,Masayuki Hirota,Antonio Norio Nakagaito,Dong-Hau Kuo
Relatively small amounts of In-doped Mo(O,S) 2 (IMS) catalysts (10%, 20%, and 30%) were deposited on cellulose nanofiber (CNF) by cross-linking them with functional groups of siloxane and epoxy to form CNF-IMS hybrid composites. The as-prepared hybrid composites were characterized and tested their performances toward the photo degradations of cationic (MB and RhB) and anionic (MO) dyes. As indium was doped into Mo(O,S) 2 lattice to form solid-solution, the charge transfer and photocarrier separation during the catalytic reaction were simultaneously enhanced as probed with electrochemical impedance spectroscopy and photoluminescence measurements, respectively. To ensure the catalyst on CNF was well deposited and recyclable, the hybrid composite was evaluated with a reusability experiment to show the stability performance in degrading organic dyes. It was found the environmentally friendly CNF-IMS hybrid composite was relatively stable during the reusability experiment, indicating no catalyst powder was leached out during the photocatalytic reaction. The photoreaction mechanism was convinced by radical-scavenging experiments to show that hydroxyl and superoxide played essential roles for the organic dye degradations in visible-light illuminated conditions. The cross-linked organic/inorganic hybrid catalyst showed a prospective visible light active material not only to solve the environmental issue due to the leaching of nanoparticles but also to lower the post-treatment/recycling cost of photocatalyst in industrial application.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Zeqi Jin,Lan Wang,Tao Chen,Junmei Liang,Qicheng Zhang,Wenchao Peng,Yang Li,Fengbao Zhang,Xiaobin Fan
Designing hydrogen evolution reaction catalysts with high performance in alkaline conditions is important for reducing energy consumption during water electrolysis. This study reports an electrodeposition–calcination–electrodeposition strategy to construct the Ni–Mo–O/Ni4Mo nanointerface on an N-doped carbon support derived from polyaniline on carbon fiber paper. The N-doped carbon support not only stabilizes the metal/metal oxide nanointerface but also generates more active intrinsic sites and electrical conductivity via the metal–N interaction. The obtained Ni–Mo–O/Ni4Mo@NC displays a low overpotential of only 61 mV at a current density of 10 mA cm–2 for alkaline HER in 1 M KOH.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 107
·期 1
·223-233
·
IF 3.9
Zhenjun Qing,Huapeng Zou,Xin Zhou,Haiyan Li,An Liu,Shumin Duan,Yingxiang Li,Sen Peng
Li 2 Co 2 Mo 3 O 12 (LCMO) ceramics were synthesized using the solid-state reaction method. X-ray diffraction analysis results indicated that the sole crystalline phase present in the ceramics was LCMO, which belongs to the orthorhombic structure of the Pnma space group. The sample, which was sintered at 850°C, demonstrated outstanding microwave dielectric properties, with an ε r value of 8.95, a Q × f value of 43 200 GHz, and a τ f value of –71.3 ppm/°C. It was found that while the main factor influencing ε r was ionic polarizability, sintering density had a lesser effect on it. Furthermore, Q × f was primarily affected by relative density, and there was no significant relationship between packing fraction and this property. The higher the degree of distortion of the [Li/CoO 6 ] octahedron is, the poorer the τ f value of LCMO ceramics. Additionally, the microwave dielectric properties of LCMO ceramics were intrinsically linked to ionicity, lattice energy, bond energy, and thermal expansion coefficient of chemical bonds, with Mo–O bonds being the primary factor affecting these properties, as supported by analysis using chemical bonding theories. Mo–O bond vibration dominated the Raman spectra. Good chemical compatibility between silver and LCMO ceramics was demonstrated through our co-firing experiment.
研究领域:
材料科学
·
陶瓷
·
微波介质
·
固态化学
·
拉曼光谱
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Adugna Boke Abdeta,Qinhan Wu,Dong-Hau Kuo,Ping Li,Hanya Zhang,Ting Huang,Jubin Zhang,Jinguo Lin,Xiaoyun Chen
The Mo-nonstoichiometry, oxygen vacancy, and S incorporation into Bi-Mo bimetallic oxide enhance the activity by creating defects that improve charge carrier separation efficiency and narrow bandgap energy. Oxygen vacancies synergistically attired nonstoichiometric and Mo-deficient and O-deficient Bi 2 Mo 3-x (S,O) 12-y oxysulfide (Mo-/O-deficient Bi 2 Mo 3 (S,O) 12 ) is found by a one-pot facile method to enhance the photocatalytic H 2 evolution and pollutant reduction via in-situ generated protons. The best Mo-/O-deficient Bi 2 Mo 3 (S,O) 12 catalyst with x = 0.75 and oxygen vacancy content of 27.6 % produced 480.87 µmol/h H 2 with 25 mg catalyst and achieved AQE of 14.26 % at λ = 420 nm, whereas reduced 88.9 % 4-NP and 91.6 % RhB by in-situ generated protons. Bi-non-stoichiometry leads to Mo 4+ and oxygen vacancy formation and creates active reaction sites of oxygen vacancy and active surface oxygen. These enhancements benefit photogenerated carrier separation efficiency and fast electron transfer and achieve Mo-/O-deficient Bi 2 Mo 3 (S,O) 12 with superb PHER. Therefore, non-stoichiometry and sulfur doping into Bi 2 Mo 3 O 12 bimetallic oxide is a promising approach for designing novel and synergistically defect-attired oxysulfide photocatalysts.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）