APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Shiwei Song,Yanhui Wang,Xiaoxu Liu,Xueqing Tian,Yucan Liu,Xiaodong Liu,Fanjia Sun,Yungang Yuan,Wei Li,Jianbing Zang
Seawater electrolysis achieves sustainable hydrogen production and seawater desalination in the context of the scarcity of freshwater resources, achieving two birds with one stone. In this study, we reported an Mo-doped NiFe-phosphate hollow bird-nest architecture consisting of porous nanosheets on NiFe-foam (Mo-NiFe-PO 3 /NFF) as an admired bifunctional electrocatalyst for overall seawater splitting. The introduction of Mo distorted the crystal structure of NiFe-phosphate, regulated the electronic environment around the Ni/Fe, and improved the electrocatalytic activity. Moreover, it also cooperated with phosphate polyanions to resist the Cl − from seawater and enhanced the corrosion resistance . The Mo-NiFe-PO 3 /NFF exhibited outstanding electrocatalytic performance for alkaline seawater electrolysis under a two-electrode system where only required 1.65 V voltage to drive 100 mA cm −2 . Particularly, the electrolyzer afforded industrially current density up to 500 mA cm −2 at a low voltage of 1.78 V, which were responsible for excellent durability up to 100 h. The bifunctional electrocatalyst in this study not only possessed high catalytic activity, but also effectively resisted the corrosion of Cl − in seawater.
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DOI
高影响因子
Materials Reports: Energy
·
2023
·
IF 0
Xiu-Qing Qiao,Wenxuan Chen,Chen Li,Zizhao Wang,Dongfang Hou,Bojing Sun,Dong-Sheng Li
Photocatalytic water splitting on noble metal-free photocatalysts for H 2 generation is a promising but challenging approach to realize solar-to-chemical energy conversion. In this study, Mo/Mo 2 C nanoparticles anchored carbon layer (Mo/Mo 2 C@C) was obtained by a one-step in-situ phase transition approach and developed for the first time as a photothermal cocatalyst to enhance the activity of ZnIn 2 S 4 photocatalyst. Mo/Mo 2 C@C nanosheet exhibits strong absorption in the full spectrum region and excellent photo-thermal conversion ability, which generates heat to improve the reaction temperature and accelerate the reaction kinetics. Moreover, metallic Mo/Mo 2 C@C couples with ZnIn 2 S 4 to form ZnIn 2 S 4 –Mo/Mo 2 C@C Schottky junction (denoted as ZMM), which prevents the electrons back transfer and restrains the charge recombination. In addition, conductive carbon with strong interfacial interaction serves as a fast charge transport bridge. Consequently, the optimized ZMM-0.2 junction exhibits an H 2 evolution rate of 1031.07 μmol g −1 h −1 , which is 41 and 4.3 times higher than bare ZnIn 2 S 4 and ZnIn 2 S 4 –Mo 2 C, respectively. By designing novel photothermal cocatalysts, our work will provide a new guidance for designing efficient photocatalysts.
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DOI
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2021
·
IF 5.234
Yongxia Li,Hui Qi,Jia Yu,Wenbo Han
Silicon nitride ceramic composites were densified by spark plasma sintering with different-sized Mo particles. In-situ synthesis of Mo-Si compound can accelerate the nucleation of β-Si 3 N 4 grain, and the number of β-Si 3 N 4 grain nucleation increases with decrease of Mo particle size during spark plasma sintering . The effect of Mo particle size on the grain growth of β-Si 3 N 4 is significant, while that for the phase composition of Si 3 N 4 samples is negligible. Si 3 N 4 ceramic composites with 6 wt% nano-sized Mo addition are shown to have the highest bending strength (922.56 MPa) and fracture toughness (8.94 MPa m 0.5 ), which is attributed primarily to more elongated β-Si 3 N 4 grains obtained by more β-Si 3 N 4 grain nucleation.
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高影响因子
Joule
·
2019
·
IF 0
Man Yang,Haifeng Qi,Fei Liu,Yujing Ren,Xiaoli Pan,Leilei Zhang,Xiaoyan Liu,Hua Wang,Jifeng Pang,Mingyuan Zheng,Aiqin Wang,Tao Zhang
Cellulosic ethanol is one of the most important biofuels, yet its commercial production is hindered by the low-efficiency and high-cost bioconversion process. Here, we report a new chemocatalytic approach for the one-pot production of cellulosic ethanol. With a multifunctional Mo/Pt/WO x catalyst, cellulose is directly converted to ethanol in a one-pot reaction with a yield as high as 43.2 C%. Kinetic analysis reveals that such a one-pot process involves tandem catalysis from cellulose to ethylene glycol (rapid) followed by hydrogenolysis of ethylene glycol to ethanol (slow). Characterizations show that isolated and low-coordinated MoO x bonds to metallic Pt particles on the mesoporous WO x support, constituting x OMo–Pt–WO x interfacial sites, which offer high activity for C–O cleavage of ethylene glycol.
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DOI
Materials
·
2024
·Vol. 17
·期 11
·2679
·
IF 3.1
Tongtong Chen,Xianying Han,Mengling Jie,Zhiwu Guo,Jiangang Li,Xiangming He
Na4Fe3(PO4)2P2O7/C (NFPP) is a promising cathode material for sodium-ion batteries, but its electrochemical performance is heavily impeded by its low electronic conductivity. To address this, pure-phase Mo6+-doped Na4Fe3−xMox(PO4)2P2O7/C (Mox-NFPP, x = 0, 0.05, 0.10, 0.15) with the Pn21a space group is successfully synthesized through spray drying and annealing methods. Density functional theory (DFT) calculations reveal that Mo6+doping facilitates the transition of electrons from the valence to the conduction band, thus enhancing the intrinsic electron conductivity of Mox-NFPP. With an optimal Mo6+doping level of x = 0.10, Mo0.10-NFPP exhibits lower charge transfer resistance, higher sodium-ion diffusion coefficients, and superior rate performance. As a result, the Mo0.10-NFPP cathode offers an initial discharge capacity of up to 123.9 mAh g−1at 0.1 C, nearly reaching its theoretical capacity. Even at a high rate of 10 C, it delivers a high discharge capacity of 86.09 mAh g−1, maintaining 96.18% of its capacity after 500 cycles. This research presents a new and straightforward strategy to enhance the electrochemical performance of NFPP cathode materials for sodium-ion batteries.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Jiameng Sun,Bin Yu,Fuquan Tan,Wanfeng Yang,Guanhua Cheng,Zhonghua Zhang
The synthesis of cost-effective and high-performance electrocatalysts for water splitting is the main challenge in electrochemical hydrogen production . In this study, we adopted a high throughput method to prepare bi-metallic catalysts for oxygen/hydrogen evolution reactions (OER/HER). A series of Ni–Mo alloy electrocatalysts with tunable compositions were prepared by a simple co-sputtering method. Due to the synergistic effect between Ni and Mo, the intrinsic electrocatalytic activity of the Ni–Mo alloy electrocatalysts is improved, resulting in excellent HER and OER performances. The Ni 90 Mo 10 electrocatalyst shows the best HER performance, with an extremely low overpotential of 58 mV at 10 mA cm −2 , while the Ni 40 Mo 60 electrocatalyst shows an overpotential of 258 mV at 10 mA cm −2 in OER. More significantly, the assembled Ni 40 Mo 60 //Ni 90 Mo 10 electrolyzer only needs a cell voltage of 1.57 V to reach 10 mA cm −2 for overall water splitting .
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DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Xu Zhang,Baochang Gao,Yuan Tian,Yu Shi,Guowei Li,Zhiguo Zhang,Chengwei Han,Li Sun,Jingru Zhang,Bo Liu,Hongwei Zhang,Guangyu Bai
Direct electrolysis of seawater offers a promising pathway for sustainable hydrogen production while avoiding the issues caused by freshwater shortages. However, the sluggish four-electron transfer kinetics and the competitive adsorption of Cl– ions of the oxygen evolution reaction (OER) during seawater electrolysis remain as key challenges in designing effective catalysts. Herein, leveraging the electron-absorbing properties of molybdenum cobalt nitride (CoN/Mo2N) to modulate the electronic structure of nickel–iron layered double hydroxide (NiFe-LDH), a nanoscale hierarchical heterostructure of NiFe-LDH coated on CoN/Mo2N (CoN/Mo2N/LDH) was engineered to achieve highly efficient OER. Operando electrochemical impedance spectroscopy reveals that the heterointerface facilitates charge transport kinetics. Additionally, charge density analysis and adsorption energy calculations confirm that the NiFe-LDH preferentially adsorbs OH– over Cl– in alkaline seawater. The CoN/Mo2N/LDH nanostructure requires only 249 mV overpotential to achieve 500 mA·cm–2 in 6 M KOH + seawater, maintaining 94.8% of its initial activity over 10 days of continuous operation. This work elucidates the electron-absorption-driven modulation of electronic structures in nitride-regulated LDH nanomaterials, enabling their application in industrial-scale seawater electrolysis. The tailored nanoscale design achieves simultaneous high-efficiency oxygen evolution and exceptional stability, advancing scalable green hydrogen production from seawater.
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
IF 5.2
Wanting Yang,Zhuoyue Lan,Xiong Li,Yunchuan Li,Hang Li,Yunxiang Du
To efficiently enrich fine copper-molybdenum ore, a pioneering method was employed by utilizing MCO (trimethyl-pyridin) and kerosene as high-efficiency composite collectors in the flotation process. Micro-flotation and actual ore flotation tests demonstrated that the composite collector manifested superior collection capacity and selectivity compared to using a single collector. Furthermore, the inclusion of kerosene reduced collector consumption, thereby lowering overall reagent costs. TOC test results indicated that the composite collector possesses a high adsorption quantity on the mineral surface. Additionally, contact angle measurements demonstrated that the composite collector significantly enhanced the surface hydrophobicity of chalcopyrite and molybdenite. FT-IR, XPS, and ToF-SIMS analyses were conducted to investigate the adsorption mechanism. The results illustrated that MCO adsorbed to mineral surfaces by forming complexes with Cu atoms in chalcopyrite and Mo atoms in molybdenite, respectively. The primary interaction between kerosene and copper-molybdenum ore involved hydrophobic attraction with kerosene physically adhering to the mineral surface to form hydrophobic aggregates. Hence, this study presented an effective procedural approach for the flotation of fine copper-molybdenum ore.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jianyue Yan,Peng Liu,Jiawen Li,Hao Huang,Shengfu Tong,Wenbo Song
The electrocatalytic nitrate reduction reaction to ammonia (NRA) offers a promising alternative to traditional ammonia synthesis methods. In nature, enzymes containing molybdenum and iron sites catalyze the reduction of nitrate and nitrite ions. Drawing inspiration from these enzymes, we synthesized a carbon-coated nano-octahedra of FeMo-based nitride (FeMoN@C NO) by pyrolyzing phosphomolybdic acid hydrate (POM) doped Fe-NH 2 -MIL-101 to catalyze NRA. Experimental results demonstrate that in an alkaline environment, FeMoN@C NO exhibits a suitable hydrogen evolution reaction (HER) capacity, and the protons or hydroxyls produced effectively facilitate the hydrogenation reaction in the ammonia synthesis process. Additionally, the introduction of Mo increases the number of active sites and effectively reduces the thermodynamic barrier in NRA, thereby enhancing the rate of ammonia synthesis. As a result, FeMoN@C NO displays outstanding NH 3 Faradaic efficiency (FE) of 98.2 % and an NH 3 yield of 434.16 µmol/h cm −2 . Building upon the excellent electrocatalytic properties of FeMoN@C NO, a new Zn-nitrate battery system is assembled in this work, which exhibits an outstanding peak power density of 3.23 mW cm −2 and an FE of 91.58 % for NH 3 production. This work provides a new perspective for designing enzyme-mimicking nitrate reduction catalysts and broadens the application of Zn-based batteries.
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DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 14
·5544
·
IF 4.6
Min Wang,Shilin Zhang,Juejin Teng,Shunsheng Zhao,Zhongtao Li,Mingbo Wu
An efficient and low-cost oxygen catalyst for the oxygen reduction reaction (ORR) was developed by in situ growth of Mn-Mo oxide nanoparticles on nitrogen-doped carbon nanotubes (NCNTs). Doped nitrogen effectively increases the electron conductivity of the MnMoO4@NCNT complex and the binding energy between the Mn-Mo oxide nanoparticles and carbon nanotubes (CNTs), leading to fast charge transfer and more catalytically active sites. Combining Mn and Mo with NCNTs improves the catalytic activity and promotes both electron and mass transfers, greatly enhancing the catalytic ability for ORR. As a result, MnMoO4@NCNT exhibited a comparable half-wave potential to commercial Pt/C and superior durability, demonstrating great potential for application in renewable energy conversion systems.Keywords:MnMoO4/NCNT composites;nitrogen doping;oxygen reduction reaction;platinum group metal (PGM)-free catalyst;electrocatalysis
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DOI
PubMed
高影响因子
Catalysts
·
2020
·Vol. 11
·期 1
·10
·
IF 3.52
Yang Dang,Yu Cheng,Yukun Zhou,Yifei Huang,Kaige Wang
The treatment of organic dye contaminants in wastewaters has now becoming more imperative. Fenton-like degradation of methylene blue (MB) and methyl orange (MO) in aqueous solution was investigated by using a nanostructure that a layer of CuCl2nanoflake film grown on the top surface of nanoporus anodic alumina substrate (nano-PAA-CuCl2) as catalyst. The new nano-PAA-CuCl2composite was fabricated with self-assembly approach, that is, a network porous structure film composed of CuCl2nanoflake grown on the upper surface of nanoporous anodic alumina substrate, and the physical and chemical properties are characterized systematically with the X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), and high-resolution transmission electron microscopy (HRTEM), Energy Dispersive Spectrometer (EDS), X-ray photoelectron spectroscopy (XPS). The experimental results showed that the nano-PAA-CuCl2catalyst presented excellent properties for the degradation of two typical organic pollutants such as MB and MO, which were almost completely degraded with 8 × 10−4mol/L nano-PAA-CuCl2catalyst after 46 min and 60 min at reaction conditions of H2O218 mM and 23 mM, respectively. The effects of different reaction parameters such as initial pH, H2O2concentration, catalyst morphology and temperature were attentively studied. And more, the stability and reusability of nano-PAA-CuCl2were examined. Finally, the mechanism of MB and MO degradation by the nano-PAA-CuCl2/H2O2system was proposed, based on the experimental data of the BCA and the temperature-programmed reduction (H2-TPR) and theoretical analysis, the reaction kinetics belonged to the pseudo-first-order equation. This new nanoporous composite material and preparation technology, as well as its application in Fenton-like reaction, provide an effective alternative method with practical application significance for wastewater treatment.Keywords:composite of nanoporous anodic alumina-CuCl2catalyst;Fenton-like reaction;advanced oxidation processes;organic pollutant;degradation mechanism
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Lele Yang,Hong Chen,Yuntao Xu,Rong Qian,Qiao Chen,Yuanxing Fang
The efficiency of hydrogen peroxide evolution reaction (H 2 O 2 ER) by photoanodic water oxidation is normally limited by low yield and poor selectivity. In this work, the surfaces of Mo doped BiVO 4 are modified by Co 2+ and PO 4 3- ions (CPMB), which has been used as the photoanode with improved H 2 O 2 yield and selectivity. The optimal evolution rate of the CPMB is ca. 0.23 µmol·min −1 ·cm −2 , corresponding to 2.5 times to the pristine BiVO 4 photoanode, and the faradaic efficiency of CPMB photoanode for H 2 O 2 ER is ca. 26%. In this study, the mechanism for the improved H 2 O 2 evolution performance of CPMB has been investigated, indicating that PO 4 3- ions mainly promote the formation of the •OH by dissociation of H 2 O, while Co 2+ ions accelerate the conversion of the •OH for the subsequent H 2 O 2 evolution. This study offers the strategy for designing an efficient photoelectrochemical system with optimized solar conversion efficiency for H 2 O 2 production.
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DOI
高影响因子
危险品化学品经营许可证（带存储）