JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Junjie Gong,Beibei Xiao,Zhenzhen Wang,Pengyue Wang,Yuhang Liu,Shijie Shen,Wenwu Zhong
Molybdenum carbide has emerged as a promising candidate for the hydrogen evolution reaction (HER) due to its Pt-like electronic properties and stability. However, it suffers from strong hydrogen adsorption and particle aggregation, limiting its catalytic efficiency. Herein, we present a facile one-step pyrolysis strategy using biomass-derived chitosan as a dual-functional carbon/nitrogen source to synthesize nitrogen-doped carbon-supported Mo/Mo 2 C heterojunctions. The chitosan-derived porous carbon matrix prevents nanoparticle agglomeration, while nitrogen doping enhances conductivity. Remarkably, theoretical and experimental analyses reveal that the active sites are not the heterojunctions themselves but the adjacent carbon matrix activated by interfacial electronic effects, achieving near-optimal hydrogen adsorption free energy (ΔG H* = 0.01 eV). The optimized catalyst demonstrates outstanding HER performance, requiring only 97.7 mV overpotential to deliver 10 mA cm - ² in alkaline media. This work provides a cost-effective synthesis method alongside novel design principles for high-performance non-precious metal HER catalysts.
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Yu-Dong Shan,Yu-Le Wang,Qing He,Yi-Fang Lu,Song-Hai Wu,Yong Liu,Xu Han
Selective oxidation of cyclohexane (CHA) to KA-oil (cyclohexanol/cyclohexanone) is an important reaction in the chemical industry, which is constrained by high energy consumption and low selectivity. In this study, Mo-doped mesoporous TiO2 (Mo-MT) has been successfully synthesized via calcinating MIL-125(Ti) doped with molybdenum acetylacetonate. A series of characterizations and density functional theory (DFT) calculations reveal that the doped Mo not only decreases the band gap from 3.02 eV (MT) to 2.71 eV (Mo-MT-2) and enhances efficiencies in charge separation and photogenerated carrier transfer but also directly reduces O2 to Mo-η2-O2 peroxo on Mo-MT-2, achieving a 3.2 times higher yield of KA-oil (62.7 μmol) than that by P25 and a high selectivity toward KA-oil of 99.9% under visible-light irradiation. Meanwhile, electron shuttling of benzoquinone facilitates electron transfer from CHA to O2, thus significantly enhancing the KA-oil yield from 62.7 to 431.0 μmol. Diffuse reflectance infrared Fourier transform spectroscopy and electron paramagnetic resonance analyses confirm the electron-shuttling roles of benzoquinone in H-abstraction and H-transfer during selective photooxidation of CHA by Mo-MT-2. DFT calculations further reveal that the benzoquinone-hydroquinone/semiquinone-benzoquinone cycle shuttles electrons from CHA to Mo-η2-O2 peroxo on the surface of Mo-MT-2, thus facilitating H-abstraction from CHA to form C6H11·, coupled with the formation of H2O2. The produced C6H11· then eventually reacts with O2 to form KA-oil. This study enriches our understanding of the importance of peroxo species and electron shuttles in selective photooxidation of C(sp3)–H.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Liandong Li,Ziqi Qiao,Bing Lin,Hailong Zhang,Yingying Wang,Zhe Sun,Yiping Hu,Denghao Ouyang,Shiyu Li,Hangzhou Wang,Junlei Tang,Caineng Zou
Electrolysis of neutral saline wastewater/seawater enables sustainable hydrogen production but faces sluggish hydrogen evolution reaction (HER) kinetics and poor durability in chloride-rich media. Herein, a novel Cu 2 S/Amorphous/Cu–Ni–Mo heterostructure electrocatalyst, prepared by electrodeposition and atomic layer deposition (ALD), was introduced to address these challenges. The electrode was synthesized by electrodepositing a Cu–Ni–Mo coating onto a stainless steel substrate, followed by in-situ sulfurization using ALD technology to form an amorphous layer, yielding a heterostructure with optimized interfacial properties. This heterostructure electrode exhibited an overpotential of 63.29 mV at −10 mA cm −2 and maintained stable operation at −100 mA cm −2 for over 180 h in 0.5 mol/L NaCl +1 mol/L phosphate buffered saline (PBS). A 10 cm × 10 cm electrode was successfully fabricated using this scalable method, which exhibited uniform morphology and stability exceeding 240 h. This work advances HER performance and scalability in neutral environments, facilitating industrial-scale electrocatalytic hydrogen production.
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Yukun Xing,Chengkai Lv,Yue Fu,Lan Luo,Jixiang Liu,Xiaoyu Xie,Fangfang Chen
Abnormal levels of dopamine (DA) and uric acid (UA) in the human body are valuable indicators for monitoring human health, as they are associated with certain diseases. Therefore, it is crucial to develop sensitive and simultaneous analytical techniques for DA and UA in diagnosing the related diseases. Herein, the Co- and Mo- doped carbon nanofibers (Co, Mo@CNFs) electrochemical biosensor was developed successfully for the sensitive and accurate simultaneous detection of DA and UA. A straightforward electrospinning technique followed by a carbonization process was employed for the synthesis of Co, Mo@CNFs, and the encapsulation of Co and Mo within CNFs served to not only prevent nanoparticle agglomeration, thus providing more active sites, but also to facilitate rapid electron transfer . By incorporating Co and Mo into CNFs, the electrocatalytic activity of the modified electrode was greatly improved due to the beneficial conductivity and synergistic effects of transition metals . This enhancement effectively addressed issues such as the overlapping anodic peaks that occur when DA and UA are oxidized concurrently. Due to the mentioned synergistic contributions, the modified Co, Mo@CNFs electrode (Co, Mo@CNFs/GCE) achieved remarkable sensitivity for the simultaneous detection of DA and UA, while also exhibiting strong anti-interference ability. The detection limits for DA and UA were 2.35 nmol L −1 and 0.16 μmol L −1 , respectively. We applied the developed Co, Mo@CNFs/GCE electrochemical biosensor to detect DA and UA in 50-fold diluted serum and urine samples. The results affirm the biosensor's reliability and precision. Moreover, the developed Co, Mo@CNFs/GCE biosensor demonstrated excellent performance in simultaneously detecting DA and UA, providing an efficient and dependable detection approach for clinical diagnosis and bioanalysis .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2024
·
IF 4.9
Guihong Han,Aohua Li,Yizhuang Wang,Hu Sun,Yanfang Huang,Bingbing Liu
The mining of strategic U-Mo deposits invariably leads to the generation of wastewater with significant risks of radioactive and heavy metal pollution. This study explores a novel process for the simultaneous precipitation-adsorption of U and Mo from mine drainage, with subsequent solidification of the radioactive Fe(OH) 3 sediments using tailings. The results demonstrate that, under specific conditions, such as 33.6 mg/L Fe 3+ and pH 6.0–7.0, more than 97 % of U and Mo can be efficiently co-removed, and the treated water exhibits a gross α radioactivity of less than 0.2 Bq/L. The U-bearing Fe(OH) 3 sediments are transformed into general solid wastes, exhibiting low α radioactivity of less than 1.0 Bq/kg for 238 U, 232 Th or 226 Ra, after being blended with tailings in a mass ratio of 1:50. The reaction, adsorption and solidification mechanisms are further elucidated. The U and Mo are primarily precipitated and adsorbed in the forms of UO 2 (OH) 2 and Fe 2 (MoO 4 ) 3 respectively. The U-bearing Fe(OH) 3 particles are firmly encapsulated by negatively charged particles of phlogopite, quartz, and orthoclase, and agglomerate into large particles within the solidification product, thereby reducing U dissolution in simulated acid rain. Ultimately, a sustainable treatment flowsheet is established for the management of U-Mo ore mine drainage and tailings.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Jiaxing Wu,Panzhe Qiao,Pan An,Mengshen Zhang,Hao Xiu,Zeyu Song,Kadi Li,Yongpeng Cui,Yajun Wang,Wenqing Yao
Non-precious metal cocatalysts and interfacial charge transfer dynamics have long been recognized as critical research frontiers in photocatalytic hydrogen production via water splitting. In this study, we demonstrate a highly efficient Mo 2 C/CdS composite photocatalyst, where the construction of Mo-S chemical bonds significantly enhances interfacial charge transfer. Mo 2 C, as an effective non-noble metal cocatalyst, facilitates the efficient acceptance of photogenerated electrons from CdS. The formation of Mo-S bonds substantially boosts the hydrogen evolution activity. Remarkably, the optimized 7 wt% Mo 2 C/CdS composite achieves a photocatalytic hydrogen production rate of 19.94 mmol h -1 g -1 , representing a 51-fold enhancement compared to pristine CdS (0.39 mmol h -1 g -1 ). Furthermore, this hydrogen evolution rate surpasses that of the Pt/CdS composite by 296%. Synchrotron radiation analysis provides direct evidence for the formation of Mo-S chemical bonds at the interface. Additionally, DFT calculations reveal that the Gibbs free energy change for hydrogen adsorption on Mo 2 C/CdS is reduced by -0.23 eV, further confirming the favorable thermodynamics for hydrogen generation. This study not only validates Mo 2 C as a promising cocatalyst but also highlights its potential to replace the benchmark Pt in photocatalytic water splitting. The findings offer valuable insights by intentionally constructing interfacial chemical bonds to accelerate charge transfer and significantly enhance photocatalytic performance.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Zhixiao Zhu,Meilian Tu,Yu-wen Hu,Weijiang Gan,Jianqiu Deng,Zhongmin Wang,M.-Sadeeq Balogun
Seawater splitting provides a sustainable approach for large-scale hydrogen production without straining freshwater resources. However, the challenge lies in achieving high catalytic activity and stability due to electrocatalyst deactivation from structural degradation, poor corrosion resistance, and surface instability in both alkaline and seawater electrolysis. To address this, we propose a novel strategy combining Fe-doping with dual-phase lattice strain engineering in nickel-molybdenum transition metal nitrides (TMNs). The Fe-doped Ni 3 Mo 3 N/Mo 2 N electrocatalyst exhibits compressive lattice strains of −4.52% and −2.91% in the Ni 3 Mo 3 N and Mo 2 N phases, respectively, enhancing its structural integrity and electronic properties. Consequently, Fe-Ni 3 Mo 3 N/Mo 2 N achieves low overpotentials of 167 and 371 mV at current densities of 10 and 500 mA cm −2 , respectively, in 1 M alkaline seawater, with exceptional stability over 100 h at 100 and 500 mA cm −2 . Theoretical calculations reveal that these compressive strains optimize the adsorption of OER intermediates and improve catalytic kinetics. This work demonstrates the promise of dual-phase lattice strain engineering in TMNs for efficient, durable, and scalable electrocatalysts in seawater electrolysis, a strategy that has yet to be fully explored for OER.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 12
·1-14
·
IF 2.8
Mei Rui,Yan Feng,Hu Sizheng,Gong Zonggui,Guo Haoxuan,Wang Qijing,Zheng Xinghua
With the increasingly urgent safety requirement of lithium-ion batteries, more and more attention has been paid to Li 7 La 3 Zr 2 O 12 (LLZO)-based solid electrolytes with high ion conductivity and excellent electrochemical performance. Unfortunately, owing to the serious “Li-loss” and the abnormal grain growth (AGG) during the long-time high-temperature sintering process, it is difficult to achieve the high-quality LLZO electrolyte with uniform and fine grains, high density and excellent electrochemical performance. In this work, Ga/Mo co-doped LLZO solid-state electrolytes have been prepared by traditional sintering (TS) and two-step sintering (TSS). And the sintering mechanism, phase stability, microstructure evolution, and electrochemical performance have been systematically investigated. A small amount of Ga/Mo doping not only promotes the formation of the cubic garnet LLZO phase, but also enhances the stability of cubic phase. High density of 92.3% and uniform microstructure without AGG have been achieved via a small amount of Ga doping and TSS. Li 6.3 Ga 0.1 La 3 Zr 1.8 Mo 0.2 O 12 electrolytes, prepared by TSS of 1200 °C/15 min-1100 °C/8 h, exhibits high ion conductivity of 2.59 × 10 –4 S·cm −1 and critical current density (CCD) value of 0.5 mA·cm −2 , low electric conductivities of 4.77 × 10 –9 S·cm −1 , which suggests it is a potential electrolyte to apply in all-solid-state batteries.
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Zhiwen Liu,Wenqiang Shen,Xiaolong Liang,Jing Liang,Ke Xu,Xu Ge,Jun Lu,Hongsheng Liu,Jingyi Xiao,Liang Wang,Junfeng Gao,Jinxuan Liu
We present a synergistic strategy integrating octahedrally coordinated Mo species as electron buffer and asymmetric site coupling in spinel Co3O4 to achieve acidic oxygen evolution reaction (AOER) activity and durability. The introduced Mo species function as dynamic electron reservoirs, effectively activating and stabilizing tetrahedral Co sites while enabling synergistic electronic coupling between tetrahedral and octahedral sites. This dual-regulation mechanism successfully suppresses cobalt overoxidation and subsequent ion dissolution by maintaining optimal charge redistribution. Furthermore, the asymmetric electronic coupling induced by Mo adjacent to both tetrahedral and octahedral sites facilitates the direct coupling of *O–*O radicals, accelerating oxygen molecule formation. The optimized Mo–Co3O4 NNAs demonstrate remarkable performance metrics: a low overpotential of 310 mV at 10 mA cm–2, exceptional stability over 200 h in 0.5 M H2SO4, and minimal degradation rate (0.09 mV h–1). These achievements position it among the most competitive acid-stable non-precious-metal-based AOER catalysts reported to date. This work establishes fundamental guidelines for designing robust nonprecious electrocatalysts in acidic media and proposes fresh perspectives for implementing oxide path mechanism (OPM) paradigms in advanced AOER.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Jiaqi Yang,Yu Yang,Kexuan Gao,Nigel J.D. Graham,Li-an Hou
Regulation of the types and content of reactive oxygen species (ROS) in advanced oxidation processes (AOPs) is regarded as a challenging task. Herein, the features of sulfur-vacancy (Sv) and nitrogen-vacancy (Nv), and cobalt (Co)/molybdenum (Mo)-bimetallic constituents were simultaneously incorporated into a novel Co-N@MoS 2 -COOH catalyst through a simple hydrothermal calcination method. The adsorption of oxygen (O 2 ) and peroxymonosulfate (PMS) was promoted by Sv/Nv, whereby the generation of superoxide radical (O 2 · - ) and singlet oxygen ( 1 O 2 ) species was induced, and the energy barrier for the formation of high-valent cobalt-oxo species (Co(IV)=O) was reduced. The decomposition of PMS was enhanced by a bimetal (Mo/Co) electronic pump and the O 2 · - , 1 O 2 , and Co(IV)=O active species degraded tetracycline (TC) together to achieve an efficient degradation rate (initial K obs = 0.490 min -1 ). The degradation intermediates and potential degradation pathways were identified, and the leaching of Co was within the acceptable range of environmental standards. Incorporation of the catalyst into a microfilter membrane achieved a 100% degradation of TC at an ultra-high membrane flux (1803.4 LMH/bar). This study provided new insights into the types of ROS regulated by bi-vacancy and bimetallic catalysts in AOP systems, with the intention of promoting a more sustainable and resource-efficient treatment technology.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Fangzhou Zhou,Fangqin Zeng,Xu Liu,Fangyang Liu,Ning Song,Chang Yan,Aobo Pu,Jongsung Park,Kaiwen Sun,Xiaojing Hao
Back contact modification plays an important role in improving energy conversion efficiency of Cu2ZnSnS4 (CZTS) thin film solar cells. In this paper, an ultrathin carbon layer is introduced on molybdenum (Mo)-coated soda lime glass (SLG) prior to the deposition of CZTS precursor to improve the back contact and therefore enhance CZTS solar cell efficiency. By introducing this layer, the short circuit current (Jsc) and device conversion efficiency increase for both nonvacuum (sol–gel) and vacuum (sputtering) methods. Specifically, for the sol–gel based process, Jsc increases from 13.60 to 16.96 mA/cm2 and efficiency from 4.47% to 5.52%, while for the sputtering based process, Jsc increases from 17.50 to 20.50 mA/cm2 and efficiency from 4.10% to 5.20%. Furthermore, introduction of this layer does not lead to any deterioration of either open circuit voltage (Voc) or fill factor (FF).
研究领域:
材料科学
·
太阳能技术
·
薄膜电池研究
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 4
·3587-3591
·
IF 1.338
Wang Qinghua,Gao Xuechuan,Zhang Renfei,Shen Beibei,Tan Zhibing,Li Zhao,Yu Shiyong
Visible-light photocatalyst of TiO2/La/Ag nanocomposites were successfully synthesized via the conventional sol–gel method and reducing agent of Ag+. The photocatalytic activities were evaluated by methyl orange (MO) degradation. They have remarkable photocatalytic
activities compared to TiO2-Anatase, which is thanks to the separation of electron–hole pairs by Ag nanoparticles and lanthanum. The products were characterized by a series of techniques such as X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM),
transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and Uv-vis. The results show that spherical nanocomposites have been prepared with the size 300 nm and Ag nanoparticles (∼10 nm) are dispersed uniformly onto the surface of TiO2/La,
which forms TiO2/La/Ag nanocomposites. TiO2/La/Ag nanocomposites have good absorption in the visible region (700 nm > > > 400 nm). The reasons are as follows: (1) the efficient separation of photogenerated electrons and holes of the photocatalysts on the surface
of TiO2/La/Ag nanocomposites and (2) a wide visiblelight photoabsorption range (700 nm > > 400 nm). Therefore, this study may provide some new idea for the rational design and the facile synthesis of composite catalysts with a green, efficient pathway.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）