ACS Applied Energy Materials
·
2024
·
IF 5.4
Dayakar Gandla,Yun’an Zhou,Yihao Yan,Yifan Niu,Fuming Zhang,Daniel Q. Tan
MXenes, a class of two-dimensional transition metal carbides and nitrides, hold great promise for electrochemical energy storage applications due to their exceptional electronic conductivity, tunable surface chemistry, and pseudocapacitive charge storage mechanisms. This study introduces a one-step approach to deposit Mo and Ti-dual oxide nanoparticles in situ onto Mo2Ti2C3Tx MXene using the Lewis acid molten salt method (LAMS), meticulously optimizing annealing conditions. The incorporation of Mo and Ti dual oxide nanoparticles improves the pristine Mo2Ti2C3Tx MXene by preventing collapse of the layered structure and restacking of MXene sheets. Both three-electrode and coin cell devices are assessed in an aqueous electrolyte, illustrating the favorable role of the nanoparticles acting as spacers. Remarkable outcomes include a specific capacity of 434 C g–1 at 5 mA cm–2, exceptional capacity retention of 94% after 5000 charge–discharge cycles at 50 mA cm–2, and a high gravimetric energy density of 52.5 W h kg–1 at a power density of 1442 W kg–1 in an aqueous 3 M KOH electrolyte. This research underscores the potential of double transition metal MXenes as energy storage electrodes and an eco-friendly mass synthesis route, contributing to sustainable advancements in energy storage technology.
研究领域:
材料科学
·
能源存储技术
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Gaili Ke,Feng Duan,Binyao Liu,Xiaotian Liu,Jinyu Wen,Bi Jia,Xiaoyan Liu,Huichao He,Yong Zhou
In theory, suitable metal ions doping into the surface of BiVO 4 photoanodes could improve its water oxidation performance effectively. But the common homogeneous reaction strategy is not well applicable for the preparation of BiVO 4 film photoanodes with metal ions surface doping. Herein, a photoelectrochemical treating approach was reported to prepare BiVO 4 films with W or Mo surface doping in saturated tungstate and molybdate-containing electrolyte, respectively. The doping of W or Mo into the surface of BiVO 4 film was attributed to the following reactions. Firstly, the photocorrosion of BiVO 4 film photoelectrodes resulted in the dissolution of VO 4 3+ from BiVO 4 lattice under AM 1.5 G illumination. Then, the WO 4 2+ or MoO 4 2+ in the saturated electrolyte entered and occupied the dissolved sites of VO 4 3+ on BiVO 4 surface through ions exchange reaction . Due to the lower radiative recombination of carrier as well as higher electrocatalytic water oxidation activity, the resultant W or Mo doped BiVO 4 films as photoanodes showed better solar water oxidation activity, kinetics and stability, although their light harvesting property and morphological feature were close to the pristine BiVO 4 film photoanode. The present work provides a new and effective approach for the achievement of metal ions doping into the surface of BiVO 4 photoanodes, which could inspire the preparation of similar photoanode materials.
研究领域:
材料科学
·
能源科学
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CHEMICAL ENGINEERING JOURNAL
·
2026
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IF 12.5
Zening Pan,Yudie Fu,Jiayu Wu,Aihua Xu,Xiuying Liu,Shuaiqi Zhao,Xiaoxia Li
Vacancy electronic quality, not quantity, governs catalytic performance. • Co-doping and quenching construct asymmetric Co–Ov–Mo motifs, transforming inert deep traps into active shallow donors. • CMO-Q activates PMS through a dual non-radical pathway. The electronic structure characteristics of oxygen vacancies (O v ) - rather than their quantity - are the fundamental factors determining peroxymonosulfate (PMS) activation. This study proposes a strategy of cobalt doping and controllable quenching to precisely construct two types of O v configurations with distinct electronic properties in MoO 3 : the symmetrical Mo–O v –Mo coordination structure in MoO 3 -Q and the asymmetrical Co–O v –Mo coordination structure in CMO-Q. Comprehensive multimodal characterizations confirm that although MoO 3 -Q has the highest O v concentration (39.78%) and the strongest EPR signal, the significantly broadened tail feature in its valence band XPS spectrum clearly indicates that the vacancies exist in the form of deep-level trap states, making it difficult for the captured charges to participate in subsequent interfacial reactions, thus presenting electronic inertness. In contrast, cobalt doping plays a directional anchoring role in the lattice, guiding the vacancies to preferentially form in the Co-adjacent coordination environment. The constructed asymmetrical Co–O v –Mo structure induces an internal polarization electric field due to the difference in electronegativity between Co 2+ and Mo 6+ , forming a shallow donor state with electron-donating function, thereby endowing the vacancies with intrinsic electronic activity. The electrochemical tests quantitatively reveal the essential differences in interfacial charge transfer kinetics between the two: CMO-Q exhibits the largest open-circuit potential shift (0.59 V ) and the smallest peak potential difference (ΔE = 0.13 V ), while MoO 3 -Q shows the smallest shift (0.47 V ) and the largest ΔE (0.26 V ). Further normalization by the electrochemically active surface area (ECSA) highlights the intrinsic activity difference: the k obs /C dl of CMO-Q reaches 6.18 min −1 ·cm 2 ·mF −1 , which is ten times higher than that of MoO 3 -Q (0.62 min −1 ·cm 2 ·mF −1 ). This work establishes vacancy quality over quantity as the design principle for high-performance catalysts.
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ACS Sustainable Chemistry & Engineering
·
2026
·Vol. 14
·期 30
·13403-13416
·
IF 7.6
Zhang Jun,Zhang Long,Zhi Fupeng,Zheng Dong,Shi Guangyue,Hou Wei,Jin Zishan,Wu Kaixuan,Yuan Doudou,Cao Lei
Efficient recovery of molybdenum(VI) and the sustainable utilization of metal-loaded spent adsorbents are important for reducing secondary pollution and promoting circular chemistry. A sodium alginate/poly(dimethylacrylamide) semi-interpenetrating polymer network hydrogel (SSP) was developed for Mo(VI) adsorption and catalytic valorization. SSP showed a Mo(VI) adsorption capacity of 108.2 mg g –1 at pH 3 and 298 K, reached equilibrium within 120 min, and retained 86.8 mg g –1 after five cycles. Mechanical testing, 10-fold scale-up preparation, and simulated high-chloride wastewater adsorption supported its practical potential. The spent Mo-loaded SSP was directly used as a supported Mo catalyst for the oxidative synthesis of 2-substituted benzimidazoles without regeneration or post-modification. Using ethanol and H 2 O 2 , 2-phenylbenzimidazole was obtained in 90.2% yield, and substituted products were obtained in 47.2-93.5% yields. Apparent TON and TOF values were 4.44–8.80 and 1.48–5.86 h –1 , respectively, with Mo leaching of approximately 0.027%. DPBF trapping and TEMP-EPR indicated that singlet oxygen was the dominant reactive species. This work establishes a Mo(VI)-specific adsorption-to-catalysis closed-loop system integrating metal removal, immobilization, and value-added organic synthesis.
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BIOMASS & BIOENERGY
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2026
·
IF 7
Yingying Zhu,Zhong Wang,Jinze Li,Yumeng Ren,Chao Zeng,Geng Chen
Mg-Zn-Fe LDH was anchored on phosphate-modified reed straw biochar. • Mg 1 Zn 1 Fe-LDH@PBC reached a surface area of 394.466 m 2 g −1 . • The adsorbent efficiently removed RhB, MO, and OTC from water. • Maximum RhB adsorption capacity reached 659.2 mg g −1 . • Removal efficiency remained around 70% after five cycles. Sustainable conversion of waste biomass into high-performance adsorbents provides an effective route for organic wastewater remediation. In this study, phosphate-modified reed straw biochar-supported layered double hydroxide composites (LDH@PBC) were synthesized via a facile co-precipitation method. Binary and ternary LDHs containing Mg 2+ , Zn 2+ , and Fe 3+ were constructed on the biochar matrix, and their adsorption performance toward rhodamine B (RhB), methyl orange (MO), and oxytetracycline (OTC) was systematically evaluated. The optimized Mg 1 Zn 1 Fe-LDH@PBC exhibited a well-developed porous structure, abundant surface functional groups, and the highest specific surface area of 394.466 m 2 g −1 . Owing to the synergistic effects of phosphate-modified biochar and Mg-Zn-Fe LDH nanosheets, the composite maintained stable adsorption efficiency over a broad pH range. The optimized Mg 1 Zn 1 Fe-LDH@PBC achieved a maximum experimental RhB adsorption capacity of 659.2 mg g −1 under the optimized dosage condition. In contrast, Langmuir isotherm fitting gave theoretical maximum monolayer adsorption capacities of 944.898, 696.552, and 303.146 mg g −1 for RhB, MO, and OTC at 298 K, respectively. Kinetic and isotherm analyses suggested that the adsorption process may be associated with multiple interactions, including electrostatic attraction, ion exchange, hydrogen bonding, π–π interactions, and possible surface complexation. In addition, the removal efficiency remained around 70% after four adsorption–desorption cycles, indicating favorable reusability. This work highlights a promising biomass-derived LDH/biochar adsorbent for efficient and sustainable removal of multiple organic pollutants from water.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Zhongjian Wang,Guojun Lv,Jingbo Wang,Zhuoran Zhang,Yuhan Jiang,Yangbin Shen
The strong d-p covalent interaction of Mo-P bonds was obtained. • Lattice doping of P into MoS 2 formed Mo-P bonds in 0.2P-MoS 2. • 0.2P-MoS 2 achieved 91.7% tetracycline degradation under LED irradiation. Antibiotic pollution in water calls for sustainable remediation approaches such as photocatalysis. Despite its promising structure and visible-light response, MoS 2 is hindered by rapid carrier recombination, which severely restrict its photocatalytic efficiency. Herein, we reported a strategy of lattice phosphorus doping into MoS 2 to modulate the electronic structure, broaden visible-light absorption, and facilitate charge separation and migration. The optimized 0.2P-MoS 2 achieved 91.7% degradation of tetracycline (30 mg/L) within 80 min under low-power LED irradiation, with a reaction rate constant 5.5-fold higher than pristine MoS 2 . The superior photocatalytic degradation activity for 0.2P-MoS 2 arises from the narrowest band gap (1.21 eV) and accelerated charge carrier migration originated from the strong d-p covalent interactions in the generated Mo-P bonds. Radical scavenging experiments and electron paramagnetic resonance characterizations identified superoxide radicals (•O 2 − ) and holes (h⁺) as the dominant reactive species. Furthermore, possible photocatalytic degradation pathways of tetracycline were proposed over the 0.2P-MoS 2 catalyst. Moreover, the 0.2P-MoS 2 catalyst maintained high activity after five consecutive cycles, demonstrating its excellent stability. This work offers an electronic structure engineering perspective for rational design of MoS 2 -based photocatalysts and provides a viable approach for antibiotic degradation under low-power light sources, holding substantial promise for environmental remediation. Download: Download high-res image (187KB) Download: Download full-size image Strong d-p orbital hybridization of Mo-P bonds within phosphorus lattice-doped MoS 2 boosts visible-light photocatalytic degradation of tetracycline into CO 2 and H 2 O.
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ACS Sensors
·
2026
·
IF 10.9
Jie Hu,Yong Chen,Xuni Yin,Qi Zeng,Chang Chen,Jiu Yin
Although metal oxide semiconductors are promising candidates for practical disease diagnosis based on H2S detection, achieving high sensitivity and a low detection limit remains a considerable challenge. In this work, Ru-functionalized Mo-doped WO3 (Ru@Mo-WO3) nanosheets were successfully synthesized via a simple hydrothermal process followed by annealing and chemical reduction. The H2S sensing performances of all WO3-based sensors were systematically investigated. The optimized Ru@Mo-WO3 sensor exhibited a remarkable response of 120 to 5 ppm H2S at the optimal operating temperature, which was approximately 30 times higher than that of pristine WO3. Moreover, the Ru@Mo-WO3 sensor demonstrates short response times, excellent H2S selectivity, and remarkable long-term stability with a low detection limit (7.9 ppb). Comprehensive experimental analyses and density functional theory (DFT) simulations reveal that the significant enhancement in sensing performance originates from the synergistic effects of Mo doping and Ru sensitization. Meanwhile, a wireless gas-detection device based on the as-fabricated Ru@Mo-WO3 gas sensor was developed to achieve real-time monitoring of oral H2S for noninvasive oral hygiene assessment. This study offers a promising strategy for the rational design of high-performance WO3-based H2S sensors.
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高影响因子
Energy & Environmental Materials
·
2026
·
IF 13.8
Guomeng Xie,Ziqin Xu,Delai Qian,Ruiwu Li,Qingsong Hua,Shun Lu,Haitao Fang
Single-crystalline Ni-rich cathodes are promising candidates for high-energy density lithium-ion batteries due to their grain-boundary-free structures, which effectively reduce structural degradation associated with intergranular microcracks often seen in polycrystalline materials. However, these single-crystalline cathodes face challenges such as slow Li + diffusion kinetics, significant parasitic interface reactions, and irreversible phase transitions at elevated cut-off voltages, which can lead to the formation of intragranular cracks and impede their practical usage. In this study, the single-crystalline LiNi 0.8 Co 0.15 Al 0.05 O 2 (NCA) was synthesized by stripping grain boundaries from polycrystalline NCA through Mo/Nb dual doping. The Mo doping near the grain surface significantly reduces parasitic interface reactions, while Nb doping within the bulk of grains helps to improve harmful irreversible phase transitions. The synergistic effect of Mo/Nb dual doping in single-crystalline NCA effectively suppresses intragranular crack formation during prolonged cycling at high cut-off voltages. Therefore, the Mo/Nb co-doped cathode demonstrates enhanced structural stability and electrochemical activity, achieving an impressive capacity retention of 82.4% after 500 cycles at 1 C between 2.8 and 4.7 V, surpassing both polycrystalline and single-crystalline NCA doped only with Mo or Nb. This work provides a new strategy to synthesize single-crystalline NCA combined with effective dual doping, advancing the development of high-energy density lithium-ion batteries.
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Green Energy & Environment
·
2026
·
IF 16.7
Zihang Wang,Yujing Wu,Jinliang Yan,Zhiyu Li,Hui Zhou,Peng Fu
Biodiesel, a renewable and carbon-neutral fuel, offers a sustainable alternative to petroleum diesel. However, its widespread application is hindered by the need for energy-intensive deoxygenation processes that often degrade the carbon backbone of fatty acid esters. This study presents a non-noble NiMo/HBeta bifunctional catalyst for the complete conversion of methyl stearate under mild conditions (190 °C), achieving 92.53% selectivity toward C18 alkanes and a high HDO/DCO (hydrodeoxygenation/(decarboxylation + decarbonylation)) ratio of 12.38, outperforming previously reported catalytic systems. Mechanistic insight reveals that atomically dispersed Ni δ+ –MoO x sites enable directed electron transfer from Ni to Mo. This creates a synergistic interface where Ni activates H 2 while Mo polarizes the C=O bond, lowering the barrier of the HDO pathway to 1.76 eV and kinetically favoring carbon-retentive deoxygenation. Concurrently, Mo reshapes the acid properties by suppressing strong Brønsted sites, establishing a Lewis-acid-dominated microenvironment that selectively cleaves C–O bonds while inhibiting C–C scission. This work elucidates how interfacial electronic synergy and tailored acidity cooperatively steer reaction pathways, offering a design principle for efficient biomass upgrading under mild conditions.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Feng Jiang,Chenchen Li,Xiang Ling
Molybdenum (Mo) is a promising structural material for ultra-high temperature applications, but its catastrophic oxidative degradation remains a critical bottleneck. Conventional single-layer silicide coatings often fail prematurely due to either weak interfacial adhesion (spallation) or insufficient long-term structural stability (cracking). To overcome these limitations, a novel dual-layer composite coating was developed in this study. An inner Mo-Si diffusion layer (∼90 μm) was first fabricated by pack cementation process to ensure robust metallurgical bonding with the Mo substrate. Subsequently, an anti-oxidative outer layer (∼98 μm) containing MoSi 2 , boron and quartz was deposited using slurry sintering technique. Isothermal oxidation tests revealed that the composite coating exhibited excellent protective performance at 1500 °C in air, with only minimal mass loss of 0.178 mg/cm 2 after 9 h. Microstructural analysis demonstrated that bidirectional Si diffusion dynamically transformed the coating into a highly stable gradient structure of SiO 2 -Mo 5 Si 3 -MoSi 2 -Mo 5 Si 3 during high-temperature exposure. The superior oxidation resistance was attributed to a synergistic anti-oxidation mechanism: the inner layer physically anchored the coating to prevent spallation, while the outer layer continuously generated a B 2 O 3 -fluxed fluid borosilicate glass phase that effectively sealed microcracks and pores. This work provides an effective architectural design strategy for developing high-performance oxidation-resistant coatings on refractory metals in ultra-high temperature environments.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zifan Wu,Lu Chen,Yacong Deng,Fengyu Tian,Guangzheng Sun,Yuting Qiu,Yichuan Li,Yuan Pan,Bin Liu,Bin Dong,Yongming Chai
Lignin-derived phenols, with their high energy density and rich aromatic structure, are potentially high-quality feedstocks for the production of aviation fuel-range cycloalkanes. Herein, we fabricated a Ni Mo alloy catalyst anchored on graphitic carbon nitride (g-C 3 N 4 ) coated γ-Al 2 O 3 (10Ni-5Mo/CN@γ-Al 2 O 3 ), which could completely hydrodeoxygenate various lignin-derived phenols into cycloalkanes under mild conditions. 10Ni-5Mo/CN@γ-Al 2 O 3 significantly catalyzed the hydrodeoxygenation of lignin oil at 240 °C under 3 MPa H 2 for 8 h, achieving a deoxygenation degree of 96.5 % and a high propylcyclohexane selectivity (41.8 %), and the resulting products met the requirements for aviation fuels. The study results showed that electron transfer within Ni Mo alloys and the strong interaction between g-C 3 N 4 and surface anchored Ni Mo alloys in 10Ni-5Mo/CN@γ-Al 2 O 3 facilitated the dissociation of H 2 into active hydrogen to hydrogenate the aromatic rings. Meanwhile, the formation of oxygen vacancies enhanced the adsorption and activation ability of the catalyst for oxygen-containing substrates, which was beneficial for the demethoxylation and dehydroxylation reactions. This work provides a new strategy for constructing supported non-noble metal catalysts for the hydrodeoxygenation of lignin oil into aviation fuels.
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TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
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2022
·
IF 3.752
He ZHANG,Zhi-bo LI,Xiao-chun DENG,Ben CHEN,Guo-hua ZHANG,Kuo-Chih CHOU
Ultrafine oxide dispersion strengthening (ODS)-Mo and ODS-W alloy powders containing different types of oxide nanoparticles were successfully synthesized by spraying method (solid−liquid mixing method) combined with the reductions with carbon black and hydrogen in sequence. It is concluded that the solution concentration and type of rare earth oxide have no effect on the grain size of ODS-Mo alloy powder, but have obvious effect on that of ODS-W alloy powder. The higher the concentration of rare earth solution is, the smaller the average grain size of ODS-W alloy powder is. Furthermore, compared with doping with CeO 2 , the grain sizes of reduction products of La 2 O 3 and Y 2 O 3 doped WO 3 are relatively larger. Compared with the undoped case, there is almost no change for grain size of ODS-Mo alloy powder, while the grain size of ODS-W alloy powder becomes much larger. This is probably due to the appearance of the composite oxide (such as La 2 WO 6 ) formed by the reaction between tungsten oxide and rare earth oxides, which promotes the heterogeneous nucleation and growth of tungsten grains during the reduction process of ODS-W, while there is no complex oxide composed of molybdenum and rare earth oxides in the reduction process of ODS-Mo.
研究领域:
材料科学
·
冶金学
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