NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Xingbo Qi,Lei Ni,Ziyan He,Xu Sun,Hejie Lu,Haiqiang Li,Ruixi Meng,Maosen Fu,Xiao Ma
Cobalt-free, nickel-rich layered oxide cathode material LiNixMn1-xO2 (NM) has attracted much attention due to its high specific capacity and low cost. However, cobalt-free cathode materials have more serious problems such as Li/Ni disorder and structural degradation compared to ternary LiNixCOyMn1-x-yO2 (x ≥0.5, NCM) cathodes. To address these challenges, LiNi0.6Mn0.4O2 (NM64) and a series of Mo-doped Li(Ni0.6Mn0.4)(1-x)MoxO2 (x = 0, 0.01, 0.02, 0.03, 0.04, 0.05) cathode materials were designed and prepared by high-temperature solid-phase method, and the effect of Mo doping on the structure and electrochemical performance of NM64 cathodes was systematically investigated. Mo doping not only suppresses Li/Ni mixing and enlarges interlayer spacing but also effectively inhibits primary particle overgrowth, resulting in refined particle morphology that enhances structural stability and Li+ transport kinetics. Consequently, the Mo-doped NMM cathodes exhibit more stable interface with significantly suppressed side reactions. Li(Ni0.6Mn0.4)0.98Mo0.02O2 cathode exhibited superior capacity retention of 86.83% after 100 cycles at 1.0 C (at 25℃ and 2.8-4.3 V), surpassing the NM matrix by 8.98% and demonstrating the remarkable cycling stability improvement. This work elucidates the structural and interfacial stabilization mechanisms induced by high-valent Mo doping, providing an effective approach to developing high-performance Co-free layered oxide cathodes.
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THERMOCHIMICA ACTA
·
2025
·
IF 3.5
Zhong-xuan Han,Hao Liu,Zhan-jun Yang,Yi-fan Guo,Shu-na Zhao,Mi Li,Lin Jiang,Andrei Rotaru
Aluminised thermites show strong potential for energy-intensive applications, but ensuring stable nanoscale dispersion and optimising combustion performance is challenging. This study prepared Al–MO/PVDF thermites (MO = ZnO, ZnFe₂O₄) by electrospraying and mechanical mixing to compare how particle morphology and compositional uniformity affect reactivity. Electrosprayed samples formed near-spherical, submicron particles with homogeneous distributions of reactants, whereas mechanically mixed samples aggregated into larger, irregular clusters. Differential scanning calorimetry revealed sharper, staged exothermic peaks in the electrosprayed thermites, indicating enhanced reactant contact, while the mechanically mixed thermites produced broad, overlapping exotherms. X-ray diffraction showed partial amorphisation and core-shell formation under rapid solvent evaporation. Laser ignition tests demonstrated faster ignition, higher flame temperatures, and more intense combustion in electrosprayed formulations, particularly Al–ZnFe₂O₄/PVDF, which exhibited a secondary heat release (micro-explosion). Electrospray-assisted fabrication improved homogeneity and promoted rapid, high-temperature reactions for enhanced combustion performance.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xiao-Yu Lang,Guo-Hua Zhang
Mo 2 FeB 2 powders with different Mo/B atomic ratios (0.9, 1.0, 1.1) were first prepared under vacuum condition using different-sized Mo powder, as well as FeB and B 4 C powders as raw materials. Based on the prepared Mo 2 FeB 2 powders, Mo 2 FeB 2 -based cermets were synthesized at different sintering temperatures. Results indicated the morphology of the hard phase was closely related to the Mo/B atomic ratio. As the Mo/B atomic ratio increased, the degree of anisotropy of the hard phase decreased significantly, and its grain morphology gradually evolved from elongated to nearly equiaxed shape. When the sintering temperature was 1200 °C, the incomplete diffusion of the liquid phase led to the occurrence of “liquid-filled lakes” in some samples, while this phenomenon became weakened after the temperature was increased. The microstructure uniformity was optimal when Mo/B = 0.9, with the hardness of 1227 HV 30 ; while the fracture toughness and transverse fracture strength were optimal when Mo/B = 1.1, reaching 23.8 MPa m 1/2 and 2125.9 MPa, respectively. Annealing twins were observed in the γ-Fe binder phase of sample D, which effectively improved the fracture toughness of the cermet by altering the crystallographic orientation of the binder phase. The cermets prepared from ultrafine Mo powders exhibited better mechanical properties due to grain refinement and low porosity.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Hailong Fang,Shangzhen Feng,Jie Yang,Huanjin Jiang,Wenhao Wang,Rijie Wang,Jixiang Chen
MgO–Al 2 O 3 supported Ni and Ni–Mo bimetallic catalysts (referred as Ni/MgAl and Ni x Mo/MgAl with the Ni/Mo atomic ratio of x, respectively) were prepared by the co-precipitation method and tested for the dry reforming of methane (DRM) on an atmospheric quartz fixed-bed. The XRD, XPS, XAFS and magnetic measurement results demonstrate that the Ni–Mo alloy forms in Ni x Mo/MgAl, which inhibits the sintering of metal particles and enhances the degree of coordination unsaturation of metal sites, and subsequently Ni x Mo/MgAl expose more metal sites than Ni/MgAl. The CO 2 -TPD and TPSR reveals than the presence of Mo promotes the adsorption and dissociation of CO 2 , beneficial to DRM and suppressing carbon deposition. Particularly, compared to that on metallic Ni, the graphitic carbon is remarkably suppressed on Ni–Mo alloy own to the charge transfer from Ni to Mo and the isolated Ni ones by the Mo ones. During DRM, Ni x Mo/MgAl are more active than Ni/MgAl, especially Ni 5 Mo/MgAl, which gives the CH 4 and CO 2 conversions of 82.3% and 87.4% at 800 °C, respectively. Also, Ni 5 Mo/MgAl is more stable than Ni/MgAl, and Ni–Mo alloy structure maintains during the reaction and after the regeneration. In addition, the DRM mechanism dominatingly via the HCOO∗ intermediate species is proposed based on in situ DRIFTS and TPSR.
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JOURNAL OF POROUS MATERIALS
·
2024
·
IF 2.5
Xiao Zhengting,Li Qingyang,Li Guangci,Wang Wentai,Li Xuebing,Chen Song,Li Chunhu
A series of Co-Mo sulfide catalysts with tube-like hollow structure were prepared by a low temperature pre-sulfurization method using various CoMoO 4 as precursors synthesized by coprecipitation process at different temperature. The crystallite structure of CoMoO 4 precursors determined the properties of Co-Mo sulfide catalysts, including pore structure, concentration of CoMoS active phase, microstructure of MoS 2 slabs, and desulfurization activity. The higher temperature led to better crystallinity of CoMoO 4 precursor, resulting in less CoMoS active phase and fewer Mo atoms at the corner sites of the pre-sulfurized catalyst. In addition, the MoS 2 slabs with shorter length and more stacking layers (especially Co-promoted MoS 2 slabs) in the catalysts are also formed at appropriate precursor preparation temperature, which are favorable for forming more unsaturated coordination sites (especially corner sites). According to the results of hydrodesulfurization of dibenzothiophene on the Co-Mo sulfide catalysts, the reaction rate and the production yield are highly dependent on the number of surface-active centers, while the activity is mainly attributed to the Type II CoMoS species.
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JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Wenyi Wang,Long Tang,Cheng Chen,Xueqin Wang,Yuanyuan Wang,Wencong Sun
Efficient and stable electrocatalysts with low platinum content are crucial for the practical application of fuel cells. The development of Pt-based single atom catalysts (SACs) has emerged as a promising research direction. In this study, we design and prepare a SACs based on MoS 2 with Pt–S–Mo and Pd–S–Mo active sites (Pd, Pt–MoS 2 ) by successively occupying vacancies, while maintaining the individual characteristics of the active sites. The resulting Pd, Pt–MoS 2 catalyst exhibits excellent electrocatalytic activity for oxygen reduction reaction (ORR), long-term stability, and resistance to common poisons (SCN − , S 2− , and methanol) under neutral conditions. Meanwhile, the microbial fuel cell (MFC) equipped with Pd, Pt–MoS 2 exhibits excellent performance in terms of actual electricity generation performance and sewage purification capacity with an ultrahigh power density, average chemical oxygen demand (COD) removal rate, and coulombic efficiency (CE) of 1398.6 ± 43.5 mW m −2 , 96.2 ± 2.2 %, and 22.5 ± 0.5 %, respectively. This strategy will provide new insights into the development of advanced bimetallic as well as polymetallic doped vacancies of MoS 2 SACs.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Jun Yang,Weibin Zhang,Xiankui Lv,Yumin Luan
Mo introduction significantly enhances CO 2 adsorption and visible-light harvesting. • MSN2 achieves a CO production rate of 15.95 μmol g −1 h −1 with 99% selectivity. • Mo-induced active sites promote charge separation and accelerate CO 2 activation. • DFT calculations reveal the critical role of Mo sites in lowering CO 2 reduction barriers. Photocatalytic CO 2 reduction provides a promising strategy for carbon resource utilization and solar-to-chemical energy conversion. However, achieving highly efficient and selective CO 2 conversion remains challenging due to the intrinsically stable CO 2 molecules, rapid recombination of photogenerated charge carriers, and competing reaction pathways. Herein, a series of Mo-modified silicon nitride (MSN) photocatalysts were constructed through a facile calcination strategy, enabling synergistic regulation of electronic structure, surface active sites, and CO 2 adsorption capability. The optimized MSN2 catalyst exhibits outstanding photocatalytic CO 2 reduction activity, under simulated solar irradiation, the CO evolution rate reaches a maximum of 15.95 μmol·g −1 ·h −1 , which is significantly higher than that of pristine Si 3 N 4 , accompanied by an ultrahigh CO selectivity of 99%. Comprehensive characterization shows that Mo introduction induces lattice distortion and surface active sites, thereby enhancing visible-light absorption. In situ FTIR spectroscopy and density functional theory calculations further reveal that Mo-associated surface active sites serve as highly active centers for CO 2 activation by stabilizing key intermediates and lowering the free-energy barrier for CO formation. This work and electronic modulation in Mo-modified silicon nitride and offers a rational design strategy for developing efficient and selective low-cost photocatalysts for solar-driven CO 2 conversion.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Yaohui Gao,Wenjun He,Da Cao,Fangqing Wang,Ying Li,Qiuyan Hao,Caichi Liu,Hui Liu
Designing effective and low-cost bifunctional electrocatalysts for the alkaline hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is essential to achieve green development of the hydrogen economy. Herein, we have developed Mo-doped Ni3S2 nanosheet array catalysts with excellent electrochemical properties. Only 85 mV (HER) and 230 mV (OER) overpotentials are required under alkaline conditions at 10 mA cm–2 and remain undegraded for 100 h. In addition, it only required 1.52 V at 10 mA cm–2 in an alkaline electrolyzer, and it remained unchanged for more than 100 h in stability tests, outperforming most reported electrocatalysts. Experiments and density functional theory (DFT) calculations confirmed that the doping of Mo could expose more active sites of Ni3S2 and optimize the adsorption free energy of the intermediate, which in turn improves its intrinsic activity. This work reveals the key role of Mo in Ni3S2 electrocatalytic performance enhancement at the atomic scale.
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CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2021
·Vol. 34
·期 4
·413-418
·
IF 1.114
Niu Xiao-you,Jiang Shen-long,Zhang Qun
Photocatalytic N 2 fixation has attracted substantial attention in
recent years, as it represents a green and sustainable development route toward
efficiently converting N 2 to NH 3 for industrial
applications. How to rationally design catalysts in this regard remains a
challenge. Here we propose a strategy that uses plasmonic hot electrons in the
highly doped TiO 2 to activate the inert N 2 molecules. The
synthesized semiconductor catalyst Mo-doped TiO 2 shows a
NH 3 production efficiency as high as 134
µmol · g −1 · h −1 under
ambient conditions, which is comparable to that achieved by the conventional
plasmonic gold metal. By means of ultra-fast spectroscopy we reveal that the
plasmonic hot electrons in the system are responsible for the activation of
N 2 molecules, enabling improvement the catalytic activity of
TiO 2 . This work opens a new avenue toward semiconductor
plasmon-based photocatalytic N 2 fixation.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Qing Xin,Xiaojie Chu,Lin Wang,Wensheng Yan,Yue Zang,Jun Lin
To satisfy the demand for emerging flexible electronics, there is an urgent need to develop integrated flexible all-solid energy storage devices. Here, a novel integrated supercapacitor is prepared based on a polyvinyl alcohol/glycerol-Mo (PVA/Gly-Mo) electrolyte and a polypyrrole/glycerol-Mo (PPy/Gly-Mo) electrode by simple in-situ polymerization and freezing/thawing methods. A series of electrode materials are prepared to understand the role of Gly-Mo in capacitor performance enhancement. The capacitance contribution is evaluated by cyclic voltammetry test data to investigate the charge storage mechanism of the optimal electrode material. Using the optimal electrode material, the as-prepared Gly-Mo based integrated supercapacitor can deliver an areal specific capacitance of 196.4 mF cm −2 at a current density of 0.2 mF cm −2 and a high energy density of 17.5 µWh cm −2 at a power density of 80 µW cm −2 . The simple device fabrication, novel structural components and satisfactory electrochemical properties of Gly-Mo based supercapacitors make them promising candidates for practical applications.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Ke Li,Xuefei Sun,Yishan Yao,Laifei Cheng,Xingang Luan
SiHfBCN ceramics derived from the polymer-derived ceramic (PDC) route possess excellent mechanical properties and high-temperature stability, yet their poor electrical conductivity limits their practical applicability. To address this issue, molybdenum (Mo) powder was introduced as a conductive filler and uniformly mixed with the SiHfBCN precursor. By tailoring the Mo content and pyrolysis temperature, interconnected Mo particles formed conductive pathways within the coating. Together with the in-situ formed graphitic carbon phase, these pathways established a hybrid conductive network, leading to a significant enhancement in electrical conductivity. After pyrolysis at 1200 °C, the SiHfBCN-0.5Mo coating exhibited a minimum resistivity of 0.381 mΩ cm. This work systematically investigates the influence of Mo content and pyrolysis temperature on the resulting electrical and mechanical properties of the coatings, providing fundamental insights into the design of polymer-derived ceramic-based conductive films.
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MOLECULES
·
2026
·Vol. 31
·期 7
·1131
·
IF 5.1
Shuai Shao,Xiaocan Liu,Ping Liang,Weiye Yang,Lijian Meng,Hongyan Peng,Shihua Zhao
Cobalt disulfide (CoS2) features highly active catalytic sites and is regarded as a promising candidate for electrocatalytic hydrogen evolution. In this study, molybdenum-doped cobalt disulfide (CoS2:Mo) was synthesized via a facile hydrothermal approach. XRD analysis confirms that the obtained samples crystallize in a cubic pyrite structure, with diffraction peaks consistently shifting towards lower angles. SEM characterization reveals that the samples exhibit microrod-like morphologies with an average size of approximately 1 μm. Integrated analyses from XRD, XPS, and EDS mapping demonstrate that Mo is uniformly distributed across the surface and successfully doped into the CoS2lattice. Electrochemical measurements indicate that the CoS2:Mo sample delivers a low overpotential of 122 mV and a Tafel slope of 128 mV dec−1at a current density of 10 mA cm−2in alkaline media, significantly surpassing the performance of pure CoS2and MoS2. Moreover, the CoS2:Mo exhibits an enhanced double-layer capacitance, with a Cdlvalue of 2.72 mF cm−2, superior to that of pure CoS2(1.63 mF cm−2) and MoS2(0.31 mF cm−2). Mo doping enhances conductivity and active sites, thereby boosting electrocatalysis. This work presents an effective strategy for the development of cost-efficient and high-performance non-precious metal electrocatalysts.
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