Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Yujie Wang,Ziqi Zhong,Guowu Zhan,Jingran Xiao
Molybdenum (Mo) doping has been recognized as an effective strategy to enhance the low-bias performance of hematite (Fe2O3) photoanodes in photoelectrochemical (PEC) water splitting. This study develops a mild hydrothermal strategy for incorporating Mo into Fe2O3 photoanodes, forming a Mo–O–Fe surface layer while avoiding the morphological degradation associated with conventional calcination. Although this modification enhances bulk charge separation and surface charge injection, the resulting Mo–O–Fe interface suppresses the functionality of directly deposited FeNi oxyhydroxide cocatalysts, yielding limited performance gains. To overcome this limitation, a hydroxyethylidene diphosphonic acid (HEDP) interlayer is introduced, which enables synergistic cooperation among the three components. It is plausible that HEDP acts as a hole-transfer mediator, shuttling holes from Mo–O–Fe surface states to the FeNi cocatalyst. The optimized FeNi/HEDP/Mo-Fe2O3 photoanode achieves a notable photocurrent density of 1.26 mA cm−2 at a low bias of 0.90 V vs. RHE and an onset potential of 0.59 V vs. RHE. The synergistic combination of mild hydrothermal doping and molecular interfacial engineering presented here provides a conceptual blueprint for the rational design of photoelectrodes, highlighting the critical need to manage interfacial charge dynamics to achieve high efficiency in the low-bias regime.
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Nanomaterials
·
2022
·Vol. 12
·期 23
·4138
·
IF 5.719
Weihua Qin,Yueming Ma,Ting He,Jingbin Hu,Pan Gao,Shaoxia Yang
A heterogeneous Fenton-like catalyst with single redox site has a rate-limiting step in oxidant activation, which limited its application in wastewater purification. To overcome this, a bimetallic doping strategy was designed to prepare a heterogeneous Fenton-like catalyst (Fe-Mo/rGO) with a double-reaction center. Combined with electrochemical impedance spectroscopy and density functional theory calculation, it was confirmed that the formation of an electron-rich Mo center and an electron-deficient Fe center through the constructed Fe-O-Mo and Mo-S-C bonding bridges induced a higher electron transfer capability in the Fe-Mo/rGO catalyst. The designed Fe-Mo/rGO catalyst exhibited excellent sulfamethazine (SMT) degradation efficiency in a broad pH range (4.8–8.4). The catalytic performance was hardly affected by inorganic anions (Cl−, SO42−and HCO3−) in the complicated and variable water environment. Compared to Fe/rGO and Mo/rGO catalysts, the SMT degradation efficiency increased by about 14.6 and 1.6 times in heterogeneous Fenton-like reaction over Fe-Mo/rGO catalyst. The electron spin resonance and radical scavenger experiments proved that ·O2−/HO2· and1O2dominate the SMT removal in the Fe-Mo/rGO/H2O2system. Fe and Mo, as active centers co-supported on rGO, significantly enhanced the electron transfer between catalyst, oxidant, and pollutants, which accelerated the reactive oxygen species generation and effectively improved the SMT degradation. Our findings offer a novel perspective to enhance the performance of heterogeneous Fenton-like catalysts by accelerating the electron transfer rate in the degradation of organic pollutants.Keywords:heterogeneous Fenton-like reaction;Fe-Mo dual-reaction-center catalyst;reactive oxygen species;sulfamethazine
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xiang Li,Huimin Yang,Qirui Wu,Chaoqi Zhu,Jiahong Tang,Chaofan Ma,Lu Tang,Huiyu Su,Xiaoxia Wang,Changsheng Xie,Dawen Zeng
Limited by the dense arrangement of oxygen atoms in the outer layer, the active Mo sites of MoO 3 ultrathin nanoflowers are shielded by oxygen, making it difficult for efficient gas adsorption. Here, oxygen atoms on the surface of MoO 3 nanoflowers (MoO 3 NFs) were knocked out based on a simple hydrogenation strategy to obtain MoO 3 defective nanoflowers (MoO 3 DNFs) with abundant molecular traps and exposed Mo sites. Notably, the response of MoO 3 DNFs-10 to 2 ppm H 2 S is 3 times that of MoO 3 NFs. Oxygen atom knockout was verified based on Laser Raman Spectroscopy, Photoluminescence (PL), UV–Visible Spectroscopy (UV–Vis), and X-ray photoelectron energy Spectroscopy (XPS), while calculations based on density functional theory (DFT) were used to reveal the sensing enhancement of molecular traps and exposed Mo sites. On the one hand, molecular traps can effectively trap H 2 S molecules to facilitate further adsorption. On the other hand, exposed Mo sites have higher charge activity and exhibit higher adsorption capacity for H 2 S gas. This work breaks through the limitations of the traditional oxygen vacancy model and innovatively discusses the synergistic effect of molecular traps and exposed Mo sites on enhanced sensing, which can provide a reference for the gas sensing by metal oxide semiconductors.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiao-ru Meng,Shuai Gao,Nianxi Liu,Pei-dong Wu,Zhen Fang
Carbonaceous electrode loaded nano Mo 2 C-Fe 3 N@NCF was synthesized by solvothermal and pyrolysis from soybean straw for high-performance zinc-air batteries (ZABs). The empowered ZAB achieved 1.51 V open-circuit voltage, 88.40 mW cm −2 power density and over 1150 h cycle life. Density functional theory analysis indicates that charge transfer from Mo 2 C-Fe 3 N heterogeneous structure to N-doped biochar can significantly reduce the reaction barrier for oxygen reduction/evolution reactions, enhancing the adsorption of oxygen intermediates. Cellulose-derived carbon provides a large specific surface area, and N-doping enhances the conductivity of the resultant biochar, which both play a crucial role in the efficient loading of Fe and Mo active sites. This work inspires the design and application of interfacial engineering on low-cost biochar carriers.
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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.
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高影响因子
RARE METALS
·
2024
·Vol. 43
·期 6
·2613-2622
·
IF 9.6
Zhang Bao-Jie,Chang Bin,Qiu Shi-Peng,Zhao Gang,Wang Xiao,Xu Xi-Jin,Mu Lan,Liao Wen-Bo,Dong Xiao-Jing
To effectively address energy challenges, it is crucial to explore efficient and stable bifunctional non-precious metal catalysts. In this study, a Mo-doped nickel–iron layered double hydroxide with flower-cluster architecture was successfully prepared by a one-step hydrothermal method, which demonstrated a good water splitting performance. After an appropriate amount of Mo doping, some lattice distortions in the material provided reactive sites for the adsorption and conversion of intermediates, thus optimising the charge distribution of the material. Moreover, the multidimensional void structures formed after doping had a larger specific surface area and accelerated the penetration of the electrolyte, which significantly improved the activity of the catalyst in alkaline media. At 10 mA·cm −2 , the hydrogen and oxygen evolution overpotentials of Mo-doped nickel–iron double hydroxides (Mo–NiFe LDH/NF-0.2) were 167 and 220 mV, respectively, with an excellent durability up to 24 h. When the Mo–NiFe LDH/NF-0.2 catalyst was used as the cathode and anode of an electrolytic cell, the catalyst achieved a current density of 10 mA·cm −2 at an applied voltage of 1.643 V. This study provides a novel approach for designing excellent bifunctional electrocatalysts containing nonprecious metals. Graphical abstract
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TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2022
·
IF 3.752
Zhuang-zhi WU,Na ZHAO,Yao LU,Hai-lang LIU,Bo-hua DUAN,Xin-li LIU,De-zhi WANG
The morphology and size of second phase greatly influence the strengthening effect on oxidation dispersion strengthened Mo alloys. In this work, a novel nanostructuring strategy is adopted to modify the second phase of Y 2 O 3 , and the corresponding effects of particle shape and size on mechanical properties of sintered Mo-Y 2 O 3 alloys were investigated. It is found that spherical particles with sizes below 200 nm are preferred due to the dominant intragranular distribution of second phases associated with better strengthening effect originating from dislocation pinning. With smaller particle size of Y 2 O 3 nanospheres (105 nm), the tensile strength of corresponding Mo alloy is enhanced by about 43.8%, much higher than that (8.3%) reinforced by second phase nanospheres with larger particle size (322 nm). Meanwhile, with similar particle size (around 100 nm), the spherical shape exhibits better strengthening effect than the one reinforced by one-dimensional rod-like second phase.
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JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 52
·期 4
·2614-2625
·
IF 2.1
Jiang Xi,Zhang Yun,Ding Shihua,Song Tianxiu,Hou Zhengpeng,Xiao Junwen,Wang Yarong
MO-ZrO 2 -Ta 2 O 5 (M = Zn, Co) ceramics were prepared by solid-phase reaction method. Thermo-gravimetric-differential thermal behavior, crystal structure, and microwave dielectric properties of ZnO-ZrO 2 -Ta 2 O 5 and CoO-ZrO 2 -Ta 2 O 5 ceramics were compared in this paper. Both of them exhibited monoclinic wolframite structure. Densest microstructures with uniform grains were obtained at 1400°C and 1425°C in the cases of M = Zn and Co, respectively. ZnO-ZrO 2 -Ta 2 O 5 and CoO-ZrO 2 -Ta 2 O 5 exhibited comparable ε r ~ 20.26 and 24.30, while the former had Q × f ~ 60, 983 GHz and the latter had Q × f ~ 95,300 GHz. The grain growth exponent and activation energy obtained from the phenomenological kinetic equation indicated the growth process of ceramics. The grain growth of Zn-based ceramic was dominated by interfacial reactions and lattice diffusion. For the other one, the grain growth mechanisms were grain boundary diffusion and lattice diffusion at high temperatures. The grain growth progress of them both affected by lattice diffusion. The growth process of ZnO-ZrO 2 -Ta 2 O 5 ceramics was faster than that of CoO-ZrO 2 -Ta 2 O 5 ceramic. However, the grains were overgrown and grew slowly at 1425°C and 1450°C, which was caused by the excessive high temperature.
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LANGMUIR
·
2026
·
IF 4.4
Xinya Ren,Taolue Liu,Fengguang Wang,Hao Li,Zifeng Huang,Yuling Li,Jinxuan Liu,Yu Wei,Yan Gao
Electrochemical water splitting is a crucial pathway for clean hydrogen production, but hydrogen evolution reaction (HER) electrodes often suffer from poor performance in alkaline conditions due to sluggish kinetics and weak durability. In this work, ammonium tetrathiomolybdate ((NH4)2MoS4) is used as a dual-functional precursor to transform Ni(OH)2 nanosheets into 3D Mo–Ni3S2 nanostructures. The fabricated electrode, Mo–Ni3S2/Nickel Foam, with an enlarged electrochemical active surface area, exhibits a low overpotential of 166 mV at 100 mA cm–2 in 1 M KOH and outstanding durability (>300 h). When integrated into anion-exchange membrane electrolyzers (AEMWE), it maintains stability for over 360 h at 500 mA cm–2. The enhanced performance could potentially be attributed to the hierarchical nanostructure that provides abundant active sites, and the in situ fabrication method ensures the durability of the electrode.
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高影响因子
Small
·
2026
·
IF 11.8
Hongwei Zhang,Shan Wang,Ziqi Wen,Jingping Wang,Youlong Xu
Na 3.5 MnCr 0.5 Ti 0.5 (PO 4 ) 3 (NMCrTP) demonstrates significant development potential as a cathode material for sodium-ion batteries owing to its low cost and high discharge plateau. However, the severe potential hysteresis phenomenon caused by Mn·Na anti-site defects (Mn·Na-ASD) of Mn 2+ residing in Na vacancies is hindering its performance release. Here, a strategy is proposed to alleviate the anti-site defects in NMCrTP through doping Mo at the Ti sites using the sol–gel method. Rietveld refinement results confirm that the content of Mn·Na-ASD decreases from 6.30% in NMCrTP/C to 0.98% in NMCrTP/C-0.05Mo. Meanwhile, Hall effect measurements verify that the Mo donor induces the carrier-type transformation from p-type to n-type, enhancing electronic conductivity from 3.07 × 10 −3 to 3.61 × 10 −3 S cm −1 . Moreover, the ion diffusion coefficient measured by GITT increases from 3.96 × 10 −12 to 1.34 × 10 −11 cm 2 /s. In result, the mean discharge potential of the NMCrTP/C-0.05Mo cathode increases from 2.62 V (vs. Na + /Na) to 3.47 V, and the electrochemical polarization decreases from ΔV = 0.20 to 0.09 V. As expected, the NMCrTP/C-0.05Mo cathode delivers an excellent rate performance of 88.4 mAh g −1 at a high rate of 10 C. This work presents an effective strategy to alleviate the potential hysteresis of the NMCrTP cathode for high-rate SIBs.
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Materials Today
·
2026
·
IF 24.1
Zhongzheng Yao,He Zhu,Yu Lou,Fan Xue,Jingqian Huang,Hua Ji,Wei-Di Liu,Xindong Zhu,Sinan Liu,Jianrong Zeng,Yang Ren,Xun-Li Wang,Yang Lu,Si Lan
Metallic glasses (MGs), despite exhibiting superior electrochemical catalytic and sensing activity to crystalline solids, remain difficult to rationally design because the structural units that directly correlate to active sites are poorly resolved. Here, we address this challenge by showing that a small change in Ni content (±4 at%) in Ni-Mo-P-B MGs gives precise control of short‑range-ordered (SRO) polyhedral motifs and their medium‑range connections. Synchrotron X-ray analysis reveals that the Ni 64 Mo 16 P 16 B 4 (Ni 64 ) stabilizes ten-coordinated (Z10) bi-capped square archimedean antiprisms (BSAPs) as the dominant SRO polyhedral, whereas Ni 60 Mo 20 P 16 B 4 (Ni 60 ) and Ni 68 Mo 12 P 16 B 4 (Ni 68 ) are dominated by nine-coordinate (Z9) tricapped trigonal prisms (TTPs). Crucially, this engineered SRO dramatically enhances the electrochemical glucose sensing: Ni 64 delivers ultrahigh sensitivity, a wide linear range, and stable operation over seven days, whose performance is far superior to conventional crystalline probes. First-principles calculations reveal that only at a Ni/Mo ratio of 4 does short-range chemical ordering favor the highly symmetric Z10 BSAPs with two Mo atoms occupying the two polyhedral caps. These Mo‑capped Z10 clusters optimally modulate Mo-Ni electronic interactions, lowering the *OH adsorption barrier and boosting catalytic reactivity. A miniaturized glucose sensor was fabricated by integrated the MG with a screen-printed electrode, demonstrating the practical applicability. Notably, we found that the dominant polyhedra show homology to local building blocks of nearby crystalline phases, suggesting that amorphous structures inherit crystal-like motifs that govern both stability and properties. Our work establishes an atomic-scale structural engineering paradigm for MG design, bridging crystalline-amorphous structural homology with functional optimization, and deepening the understanding of structure–property correlations in MG systems.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Xingzhuo Han,Peng Wu,Yibo Wang,Xiuli Hu,Zhiyu Jia,Juan Gao
The lower thermodynamic potential of the urea oxidation reaction (UOR) makes it an ideal alternative to the conventional oxygen evolution reaction (OER). However, most Ni-based UOR catalysts face intrinsic limitations due to the high oxidation potential of Ni3+, coupled with insufficient selectivity. Herein, F/Mo codoped Ni-based catalyst F-MoNiP is obtained with an amorphous nanotube structure. The F/Mo codoped strategy enhances UOR activity by facilitating the formation of catalytically active NiOOH species at low overpotential and simultaneously promotes urea decomposition through the environmentally preferred carbonate pathway. Moreover, the presence of F effectively suppresses the OH– adsorption, thereby minimizing the competition with OER. This synergistic optimization enables F-MoNiP to achieve exceptional catalytic performance, operating at a cell voltage of 1.395 V to deliver a current density of 10 mA cm–2 in urea-assisted electrolysis of water. These findings offer a sustainable and energy-efficient route for hydrogen production through urea electrolysis.
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