INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Rui Liu,Yunpei Cui,Na Chai,Lei Yang,Xiufeng Zhang,Qianqian Nie,Hesheng Yu
This study developed an amorphous MoO 2 –C hollow spherical cocatalyst (MOC) derived from Mo-polydopamine, and hybridized it with ZnIn 2 S 4 to form ZnIn 2 S 4 /MoO 2 –C (ZMC) composites. Various characterizations were conducted to analyze the crystal structure, morphology, and photoelectrical properties of the ZMC composites. The prepared ZMC composites were evaluated for photocatalytic hydrogen evolution under simulated sunlight. Furthermore, nanorod-like MoO 2 –C cocatalyst (A-MOC) and ZnIn 2 S 4 /A-MOC (A-ZMC) composites were prepared to investigate the impact of carbon source on catalytic activity. Results show that the addition of MOC cocatalyst significantly enhances the hydrogen evolution rate of ZnIn 2 S 4 from 0.54 to 20.61 mmol g −1 h −1 , and increases the apparent quantum efficiency at 420 nm from 1.66 % to 8.63 %. The hydrogen evolution rate of the optimal ZMC is 1.26 times that of the optimal A-ZMC (16.28 mmol g −1 h −1 ). The crystal structure and morphology of MoO 2 –C determined by carbon source affect the photocatalytic hydrogen evolution performance of ZnIn 2 S 4 . Insight mechanism analysis indicates that the formation of a Schottky junction facilitates the separation of photogenerated electron-hole pairs, thereby enhancing the photocatalytic hydrogen evolution activity. Finally, the ZMC composite catalyst retains 89 % of its original hydrogen evolution performance after 5 cycles over 15 h, demonstrating good stability and promising prospects for real-world applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hongyang Lv,Fengyu Tian,Xingxing Cui,Zhenkun Chen,Guangzheng Sun,Yuan Pan,Yichuan Li,Bin Dong,Bin Liu,Yongming Chai,Chenguang Liu
With the trend of heavy and inferior crude oil, the design of hydrodesulfurization (HDS) catalysts with excellent activity and high active metal utilization is an inevitable trend for the upgrading of refining technology. In this study, a highly dispersed Mo catalyst confined within nitrogen-doped porous carbon (xMo@NC) was prepared using an in situ encapsulation-pyrolysis approach and used in the HDS reaction of dibenzothiophene (DBT). The methods of XRD, HRTEM, HAADF-STEM, N 2 physisorption, FT-IR, Raman, and XPS were used to carry out thorough microstructural characterization. The results demonstrated that the Mo species in xMo@NC were highly dispersed, exhibiting superior intrinsic HDS activity compared to MoS 2 /NC* catalysts and conventional supported catalyst MoS 2 /Al 2 O 3 . The xMo@NC catalyst exhibited significant direct desulfurization (DDS) pathway in the HDS reaction of DBT. Differential charge density and bader charge suggested that significant electron transfer between the sulfur atom of DBT and the Mo species of xMo@NC, which weakened the C S bond and made it easier to remove sulfur via DDS pathway during the HDS reaction. This work presents a new catalytic material with high intrinsic activity and enhanced DDS desulfurization selectivity, providing fresh perspectives on the creation of high-performance HDS catalysts.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 33
·2101532
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IF 18.808
Jin Wang,Mengke Zhang,Guanglong Yang,Wenwu Song,Weiting Zhong,Xunyue Wang,Minmin Wang,Tongming Sun,Yanfeng Tang
Highly efficient electrocatalysts composed of earth-abundant elements are desired for water-splitting to produce clean and renewable chemical fuel. Herein, a heteroatomic-doped multi-phase Mo-doped nickel phosphide/nickel sulfide (Mo-NiP x /NiS y ) nanowire electrocatalyst is designed by a successive phosphorization and sulfuration method for boosting overall water splitting (both oxygen and hydrogen evolution reactions (HER)) in alkaline solution. As expected, the Mo-NiP x /NiS y electrode possesses low overpotentials both at low and high current densities in HER, while the Mo-NiP x /NiS y heterostructure exhibits high active performance with ultra-low overpotentials of 137, 182, and 250 mV at the current density of 10, 100, and 400 mA cm −2 in 1 m KOH solution, respectively, in oxygen evolution reaction. In particular, the as-prepared Mo-NiP x /NiS y electrodes exhibit remarkable full water splitting performance at both low and high current densities of 10, 100, and 400 mA cm −2 with 1.42, 1.70, and 2.36 V, respectively, which is comparable to commercial electrolysis.
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AICHE JOURNAL
·
2025
·
IF 4
Biao Yang,Ze-Peng Bai,Run-Dong Cui,Xiao-Fei Zeng,Jie-Xin Wang
Hydrogen production via water electrolysis is limited by the high energy barrier of the oxygen evolution reaction (OER). As an emerging oxide material, high-entropy oxides (HEOs) are regarded as promising OER electrocatalysts owing to the multielement synergistic effect. Herein, a facile approach is proposed to synthesize Mo-doped high-entropy spinel oxide Mo-(FeCoNiCrMn) 3 O 4 nanoparticles (Mo-HEO). Interestingly, only low-content Mo doping into HEO can reduce the crystallite size, prevent particle agglomeration, and modulate the electron structure. Consequently, the electrocatalyst of 6% Mo-HEO exhibits superior OER performance with overpotentials of only 280 and 324 mV at 10 and 100 mA cm −2 . In situ Raman spectroscopy confirms the transformation of surface spinel sites to metal oxyhydroxide, highlighting the Mo-driven surface reconstruction. Furthermore, Mo doping as a versatile strategy has been successfully extended to other spinel oxides with significant activity improvements, offering a great potential in the development of spinel-typed HEO electrocatalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Liyong Du,Heming Sun,Yi Liu
Metal-organic frameworks (MOFs) derived oxide semiconductors have drawn more and more attention in many fields due to their unique structural merits. Herein, hierarchical flower-like Mo-doped Co 3 O 4 derived Co-MOF has been synthesized through a solvothermal method and following annealing process. The gas sensing measurements show that the sensing properties of Mo-doped Co 3 O 4 sample are far superior than that of pure Co 3 O 4 . In particular, 1 at% Mo-doped Co 3 O 4 sample exhibits high response values of 92–50 ppm TEA at 180 °C, which are about 46 times than that of pure Co 3 O 4 sample. In addition, it shows short recovery time (33 s), excellent gas selectivity, good repeatability and long-term stability. The improved gas sensing performance can be ascribed to Mo doping and hierarchical flower-like microstructure.
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Frontiers in Materials
·
2022
·
IF 3.985
Yang Jiangping,Zhang Zhe,Sun Siyuan,Wang Cheng
The development of transition metal oxides (TMOs) as electrocatalysts for oxygen evolution reaction (OER) has the potential to surpass the performance of noble-metal-based catalysts. In this work, a quenching rapidly strategy was used to synthesize Mo-modified Co3O4 nanosheet arrays as advanced catalysts. The resulting Mo-Co3O4 electrodes showed superior activity and reaction kinetics, with an overpotential of only 341 mV to drive a current density of 100 mA cm−2 and a Tafel slope of 69.0 mV dec−1. This improved performance is thought to be due to the formation of high-valence Co sites, which creates a synergistic effect. The ability to regulate the synthesis without causing obvious agglomeration and nucleation growth during annealing makes this method a promising approach for the design of other advanced functional materials.
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AICHE JOURNAL
·
2022
·Vol. 68
·期 11
·e17831
·
IF 4.167
Chong Peng,Peng Liu,Zhiming Zhou,Xiangchen Fang,Yun-Xiang Pan
Phenanthrene hydrogenation is a key reaction for improving the quality of gasoline and diesel. Herein, we conduct detailed thermodynamic and kinetic analyses for phenanthrene hydrogenation on a Ni-Mo/HY catalyst. We establish a comprehensive reaction network for phenanthrene hydrogenation, and calculate equilibrium constant, rate constant, adsorption constant, activation energy barrier, and reaction energy for each step in the reaction network. All of the steps in the reaction network are revealed to be exothermic. A kinetic model with 28 parameters is constructed for phenanthrene hydrogenation. The deviation of the product yields calculated by the kinetic model from those obtained in experiments is less than 4.5%, indicating the reasonability and accuracy of the kinetic model. The most favorable pathway for phenanthrene hydrogenation is demonstrated to be phenanthrene → tetrahydrophenanthrene → sym-octahydrophenanthrene → 5,6-butyl-tetrahydronaphthalene → tetralin. These results are helpful for efficiently tuning catalyst properties and optimizing reaction conditions for enhancing phenanthrene hydrogenation.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Wucan Liu,Junxing Wang,Xiang Sun,Ming Cheng,Jiamin Jin,Dang-Guo Cheng,Fengqiu Chen
Vinylidene fluoride (VDF) is a fundamental fluorinated olefin in the fluorochemical industry, and innovation in its production holds significant importance for sustainable development. Traditional routes involving the dehydrohalogenation or dehalogenation of halogenated alkanes suffer from issues such as substantial waste emissions and severe equipment corrosion. The one-step catalytic dehydrogenation of 1,1-difluoroethane (HFC-152a) to produce VDF offers notable advantages. To accomplish this goal, this work innovatively aims to construct an oxidative dehydrogenation system with a highly dispersed Mo/Ti catalyst for HFC-152a. Through systematic characterization techniques, such as XPS, XRD, Raman spectroscopy, and TPD, the reaction mechanism is thoroughly investigated. These results prove that more abundant O2– species are related to improved activity, achieving 21.1% VDF selectivity and modest stability for at least 20 h.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Juanjuan Wang,Yuxuan Xiao,Jinxian Feng,Chunfa Liu,Lun Li,Youpeng Cao,Chengcheng Zhong,Ziwen Feng,Wendi Zhang,Zhi-Quan Liu,Hui Pan
The development of efficient and durable electrocatalysts for the hydrogen evolution reaction (HER) in alkaline media remains a major challenge due to sluggish reaction kinetics and structural instability of non-noble metal catalysts. Herein, we report a phosphorus-incorporated cobalt molybdate (CoMoO-P) catalyst for regulating the dynamic reconstruction process of Mo-based materials during alkaline HER. Notably, the incorporated P not only enhances electron density at Mo/Co active sites to optimize intermediate adsorption but also regulates the Mo leaching-redeposition dynamics, distinguishing from prior P-doping strategies with a focus solely on electronic modulation. Importantly, the controlled leaching of Mo facilitates the Co(OH) 2 formation that enhances HER kinetics. As a result, CoMoO-P delivers a low overpotential of 42 mV at 10 mA cm −2 and exhibits outstanding durability at various current densities of 100, 500, and 1 A cm −2 for total of 500 h. This study offers a promising strategy for regulating catalyst reconstruction and advancing the design of high-performance non-noble metal HER electrocatalysts.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xianglong Zhang,Xiao Fengb,Wei Zhou,Huai Liu,Wenlong Jia,Dan Li,Rui Zhang,Lincai Peng
The catalytic conversion of concentrated glucose to mannose is of considerable interest due to the latter's therapeutic value, yet it is constrained by low catalytic efficiency. Herein, a Mo/NC-300 catalyst was constructed by introducing active Mo species into a nitrogen-doped carbon (NC) matrix via pyrolysis. The resulting catalyst demonstrated outstanding activity in the epimerization of high-concentration glucose (50 wt%) to mannose, achieving a high yield of 33.4 % and selectivity of 94.6 %, alongside an excellent productivity of 123.7 mmol·g cat −1 ·h −1 . Catalyst characterizations and density functional theory calculations revealed that the NC layer modulates the electronic structure of Mo species, shifting the d-band center upwards. This preferentially enhances glucose adsorption and lowers the epimerization energy barrier. Isotope labeling experiments further confirmed the reaction follows an intramolecular 1,2‑carbon shift mechanism. The catalyst also exhibited excellent stability and reusability, primarily attributed to the hydrophobicity imparted by the NC layer. This work not only provides a catalytic system that simultaneously overcomes the challenges of concentration, stability, and efficiency, but also offers insights into the role of electronic metal-support interaction in glucose epimerization.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Deliang Cheng,Lichun Yang,Renzong Hu,Jie Cui,Jiangwen Liu,Min Zhu
Sn-based chalcogenides are considered as one of the most promising anode materials for lithium-ion batteries (LIBs) because of their high capacities through both conversion and alloying reactions. However, the realization of full capacities of Sn-based chalcogenides is mainly hindered by the large volume variation and inferior reversibility of conversion reaction during cycling. In present work, a new ternary SnS-Mo-graphene nanosheets (SnS-Mo-GNs) composite is fabricated by a simple and scalable plasma milling method, in which SnS nanoparticles are tightly bonded with Mo and GNs. The Mo and GNs additives can effectively alleviate the large volume change of SnS upon cycling, which leads to a stable electrochemical framework. Moreover, they can significantly suppress the Sn agglomeration in lithiated SnS, which enables highly reversible conversion reaction during cycling. As anode for LIBs, the SnS-Mo-GNs composite exhibits a high initial coulombic efficiency of 86.9% (almost complete reversibility of SnS, ∼97.3%), high cyclic coulombic efficiency after initial three cycles (> 99.5%), and long lifespan (up to 600 cycles). Moreover, it also demonstrates superior electrochemical performance for sodium storage. Thus, this work demonstrates a potential anode for batteries application and provides a viable strategy to obtain highly reversible and stable anodes for lithium/sodium storage.
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JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Biyun Fang,Zeliang Qi,Fangming Liu,Chuanfeng Zhang,Chunyan Li,Jun Ni,Jianxin Lin,Bingyu Lin,Lilong Jiang
The development of efficient oxides-supported bimetallic catalysts is critical for ammonia synthesis or other catalytic reactions. Herein, the design of ceria-supported Co-Mo bimetallic catalysts with different properties is performed by changing Mo addition to enhance the ammonia synthesis activities. It is found that the reduction of ceria and molybdenum oxide would be boosted by Co species, but the reduction of the bimetallic catalyst would be inhibited by the aggregated molybdenum oxide for the catalyst with Co and Mo simultaneous addition. On the contrary, this ill effect of molybdenum oxide on the reduction of the bimetallic catalyst can be effectively alleviated by the subsequent addition of Mo species to ceria-supported Co catalyst, resulting in enhancement of the proportion of Co metal, Ce 3+ and low-valent Mo species, as well as surface enrichment of Co species. In such cases, the amount of the adsorbed hydrogen and nitrogen species would increase, and hydrogen species preferentially desorbs following a pathway of H 2 formation. As a result, the catalyst obtained by the separate addition of Co and Mo shows 2.5-fold more active than its counterpart with the simultaneous addition of Co and Mo species. These findings provide a valuable insight in designing reducible oxide-supported bimetallic catalysts in ammonia synthesis or other hydrogen-involved reactions.
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