JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 12
·12635-12639
·
IF 1.338
Du Jingjing,Xie Shaowen,Li Na,Xu Jianxiong,Xu Lijian
Hierarchical nanoporous Al–SiO2 particles were prepared in this study by dissolving template method. The hierarchical nanoporous Al–SiO2 particles with hollow structure were analyzed by transmission electron microscope (TEM), energy dispersive spectrometer
(EDS), scanning electron microscope (SEM), nitrogen adsorption stripping curves and Barrett-Joyner-Halenda (BJH) pore size distribution curves. Hierarchical nanoporous Al–SiO2/Ni–Mo composite electrodes were prepared by composite deposition of hierarchical nanoporous
Al–SiO2 particles onto electroplating bath of Ni–Mo. Results showed that the specific surface area for the hierarchical nanoporous Al–SiO2 sample was 396 m2/g, with pore volume being 1.37 cm3/g and mesoporous pore size being 3.3
nm. The hydrogen evolution electrocatalytic activities for the composite electrodes reached the optimal value when the concentration of the hierarchical nanoporous Al–SiO2 in the electroplating bath was 2 g/L, indicating that their “foam” structure did not only
enhance the electrode surface area but also effectively improved the electrocatalytic properties of aluminum and showed that the electrocatalytic hydrogen evolution by the hierarchical nanoporous Al–SiO2/Ni–Mo composite electrodes had more advantages than that of the
Ni–Mo electrodes alone.
研究领域:
材料科学
·
电化学
·
纳米技术
·
催化
✓ 已验证
DOI
高影响因子
Heliyon
·
2024
·
IF 3.4
Haoruo Jia,Ziyuan Zheng,Jining Qu,Hongtao Yu,Zhoujun Zhu,Qingda Lu,Fei Su,Yating Yang,Tongtong Feng,Qiang Jie
Although Zeolitic Imidazolate Framework-8 (ZIF-8) shows significant promise in chemodynamic therapy of bacterial infections due to its large specific surface area and enzyme-like activity, it still faces a considerable gap compared to natural enzymes. The dependency on low pH and high concentrations of hydrogen peroxide ((H 2 O 2 ) is a major factor limiting the clinical progress of nanozymes. Single-atom nanozymes (SA-zyme), which exhibit superior catalytic performance, are expected to overcome this limitation. In this study, we used ZIF-8 as a template to prepare structurally regular molybdenum-based single-atom nanozymes (Mo-zyme) by coordinating molybdenum atoms with nitrogen atoms within the zeolitic imidazolate framework and evaporating the zinc element at high temperatures. The cascade catalytic performance of the nanodrugs was enhanced by loading glucose oxidase (GOx) and encapsulating it with a hyaluronic acid (HA) layer to form a composite (Mo/GOx@HA). Upon contact with hyaluronidase from bacteria in infected tissues, the cascade reaction is triggered, resulting in the degradation of the HA shell, and releasing the encapsulated GOx. Once exposed, GOx catalyzes the oxidation of glucose into gluconic acid, resulting in a localized decrease in pH and continuous production of H 2 O 2 . The combination of lowered pH and increased H 2 O 2 concentration significantly amplifies the catalytic activity of the Mo-zyme. This enhanced activity facilitates the in situ generation of hydroxyl radicals (•OH) on the bacterial surface, leading to effective and efficient bacterial eradication. Wound infection treatment has demonstrated that the as-prepared Mo/GOx@HA exhibits excellent antibacterial and anti-inflammatory activity. This work provided a promising enzymatic cascade reaction nanoplatform for the treatment of bacteria infected wounds.
研究领域:
生物医学工程
·
纳米医学
·
抗菌材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Junfang Cheng,Zuyu Zhang,Xinyi Li,Zijie Peng,Ziye Feng,Huimin Wang,Sijia Kong,Dawei Liu,Jiantao Zai
The advancement of seawater electrolysis requires highly active and durable nanostructured anode catalysts to enhance the oxygen evolution reaction (OER) while suppressing chloride oxidation (ClOR) and corrosion. High-entropy spinel oxide nanoparticles (HESO NPs) have emerged as promising OER catalysts in alkaline media due to their tunable electronic structures and synergistic multimetal effects. In this study, three nanostructured high-entropy spinel oxides─(CrFeMnNiCo)3O4, (CrFeMnNiCoMo)3O4, and (CrFeMnNiCoRu)3O4─were synthesized via a scalable hydrothermal–calcination method, featuring well-defined spinel phases, uniform elemental distribution, and nanoscale morphology. Notably, the Mo-doped (CrFeMnNiCoMo)3O4 NPs exhibited superior OER performance, achieving low overpotentials of 184 and 229 mV at 10 mA cm–2 in 1 M KOH and alkaline simulated seawater (1 M KOH + 1 M NaCl), respectively, outperforming even the Ru-containing (CrFeMnNiCoRu)3O4 NPs. Furthermore, the nanostructured (CrFeMnNiCoMo)3O4 demonstrated exceptional durability, maintaining stability for 20 h at 50 mA cm–2 in 1 M KOH and 5 h in simulated seawater, significantly surpassing the (CrFeMnNiCo)3O4 NPs. This enhanced stability is attributed to the protective Mo-rich surface layer, which mitigates alkaline corrosion and chloride adsorption. The nanoscale engineering of high-entropy spinel oxides, combined with Mo doping, provides a synergistic strategy to optimize OER activity and ClOR resistance, making them highly suitable for seawater electrolysis applications. This work highlights the potential of high-entropy oxide nanomaterials as efficient and robust electrocatalysts for sustainable hydrogen production.
研究领域:
电化学
·
纳米材料
·
催化
·
能量转换
·
水分解
·
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Jianmin Li,Changyan Guo,Yanan Niu,Xianglei Cao,Jiang Li,Jide Wang
The photocatalytic oxidation of benzyl alcohol and the simultaneous evolution of hydrogen from water are efficient dual-optimal routes. It is important to develop composite catalysts that combine redox properties and facilitate electron–hole separation and transport. Herein, the bimetallic-doped Mo-ZIS@Ti photocatalyst was designed and synthesized, and the selective oxidation of benzyl alcohol and hydrogen evolution by water splitting was realized at the same time. Under visible light irradiation, benzyl alcohol was completely converted with more than 99% selectivity for benzaldehyde, and the H2 production rate was 5.6 times higher than the initial ZIS. The exceptional catalytic performance was ascribed to utilizing Ti-MIL-125 as a precursor, wherein slowly releasing-doped Ti formed robust Ti–S bonds that quickly transfer electrons and reduce sites. Meanwhile, doping Mo effectively captures photogenerated holes and acts as active sites for oxidation reactions. Both experimental characterization and work function calculations demonstrate that the bimetallic synergism effectively modulates the electronic structure of ZIS, promotes the directional separation of electrons and holes, and significantly improves the photoactivity and stability of ZIS. This work contributes a route to obtain benzaldehyde and green hydrogen at the same time and also gives new insights for the construction and mechanism study of bimetallic-doping catalysts.
研究领域:
材料科学
·
催化
·
光化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Daming Feng,Lixue Zhou,Chang Liu,Hui Li,Yusheng Zhang,Yali Yao,Tianyi Ma
Electrocatalytic nitrogen reduction reaction (NRR) for the synthesis of ammonia (NH 3 ) is one of the green and mild methods of artificial nitrogen fixation, promising as an alternative to replace the existing industrial process. Under the requirements of green chemistry and sustainable development, the design and development of highly active and stable electrocatalysts is very important for improved synthesis performance. Mimicking from the natural nitrogenase, Fe and Mo based catalysts have attracted much attention due to their superior catalytic performance for N 2 adsorption and activation. In this work, an interfacial engineering strategy has been used to prepare a Fe, Mo-bimetallic electrocatalyst for the electrosynthesis of NH 3 . In detail, the pre-pyrolyzed biochar-based Fe 2 O 3 composites were decorated with nano-flowered MoS 2 /MoO 2 hybrids by a solvothermal process (MoS 2 /MoO 2 @Fe 2 O 3 /BC). As confirmed by the extensive characterization, the further modification not only introduced functional counterparts into the electrocatalysts but also regulated the morphology of the nanostructure. The electrochemical tests showed that the highest NH 3 yield rate of MoS 2 /MoO 2 @Fe 2 O 3 /BC was 4.87 μg h − 1 cm −2 and highest FE was 16.5% in 0.1 M Na 2 SO 4 . The catalytic stability and durability were also presented in the longtime electrolysis and cycling experiments. The improved catalytic performance of decorated catalyst, as evidenced by the comparison with Fe 2 O 3 /BC, is attributed to the increased electrocatalytic active area, the moderated hydrophilicity, and the synergistic effect of Fe, Mo-bimetallic active sites. This study provides a new perspective for the design and development of low-cost transition metal complexes as electrocatalysts for nitrogen reduction reactions.
研究领域:
电化学
·
催化
·
材料科学
·
环境化学
·
可持续能源
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Zhenyu Yan,Wenyu Gao,Chenkai Zhong,Qiangqiang Jiao,Shujie Tian,Jia Liu
Ammonia (NH 3 ) plays an important role in agricultural production and is also an ideal zero-carbon energy source in sustainable hydrogen economy. Electrocatalytic nitrate (NO 3 - ) reduction reaction can simultaneously consume nitrogen pollutants in water during the synthesis of NH 3 , which is the most promising and gentle alternative process to the Haber-Bosch. However, due to the interference of hydrogen evolution reaction and high overpotential, the development of efficient directional ammonia conversion catalysts has become the key. In this study, Mo-Fe 2 O 3 material were fabricated by crystal face engineering and orbital manipulation strategies. The (001) face of α-Fe 2 O 3 with the best electrochemical performance was exposed by thermodynamic control, and the in-situ substitution of Mo single atoms for near-surface Fe atoms was further used to achieve excellent ammonia synthesis activity. NH 3 yield of 493.67 μg/h/mg cat and Faraday efficiency of 95.0% were achieved at -0.5 V vs. RHE (pH=7, 0.1 M PBS+500 ppm NO 3 - ). The mechanistic analysis showed that the highly electronegative Mo atoms induced strong interaction by Fe-O-Mo bond, which prompted Fe(III) to preferentially fill the lower t2g orbital and form a low-spin state. The weaker anti-bonding state enhances the interaction between Fe(III) and the coordinating O atoms in NO 3 - , thereby strengthening electron transfer. In summary, the targeted regulation of the crystal facet and electronic orbitals of catalysts presents a promising strategy for enhancing the conversion of NO 3 - to NH 3 .
研究领域:
材料科学
·
电化学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yijie Yang,Shun Yao,Ying Li,Yuanhang Wu,Chang Li,Congshu Hang,Hui Li
Development of efficient, low-cost, and bifunctional catalysts based on ultrathin heterostructures for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is critical for advancing overall water splitting. In this study, we design a simple intercalation-sulfidation strategy by rigid segment-containing Polysulfide as a sulfur source and in-situ intercalation for the construction of the metastable 1 T'-2H'-phase Mo-Ni 3 S 2 heterostructures (1 T'-2H'-Mo-Ni 3 S 2 ). It is found that the Polysulfides with rigid segments can be controlled by various monomers reacted with reverse sulfurization reactions between various monomers and elemental sulfur, such as Poly (sulfur-random-1,3-Benzenedithiol), Poly (sulfur-random-1,4-Benzenedithiol), and Poly (sulfur-random-4,4′-Biphenyldithiol), which can be used to assist in the synthesis process of metastable. Attributing to favorable synergy interaction in composition and structure, the resultant 1 T'-2H' phase Mo-Ni 3 S 2 heterostructures shows the superior performances toward OER and water splitting in alkaline medium. The resultant Mo-Ni 3 S 2 -BDP needs only an overpotential of 103 mV at a current density of 10 mA cm −2 and for OER. For HER, it demonstrates a low overpotential of 136 mV at 10 mA cm −2 , and a relatively low cell voltage of 1.672 V for water splitting. The present provides a new strategy to design and develop the phase engineering of other materials with various Polymorphs.
研究领域:
材料科学
·
电化学
·
催化
·
纳米技术
·
能量转换
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Qiulan Li,Jitao Li,Yang Jiao,Xiaolan Yang,Dezhi Yang,Zitao Zhong,Yaling Yang
The pathogenic bacteria induced foodborne disease has been detrimental to public health worldwide. Herein, the peroxidase (POD)-like Fe 3 O 4 /MWCNTs@Mo-CDs (FMMC) nanozyme was applied for the detection of Escherichia coli ( E. coli ). The E. coli aptamer was conjugated with the surface of the FMMC, which effectively enhanced the POD-like activity attributing to the higher affinity to the substrate, and then specific capture of E. coli in food matrices, leading to the reduction of POD-like activity. Therefore, a robust and facile colorimetric aptasensor was developed for detecting E. coli with a wide linear range of 10 1 –10 6 CFU/mL, low LOQ of 10 1 CFU/mL and LOD of 0.978 CFU/mL. The aptasensor demonstrated the satisfied selectivity for E. coli compared to the other strains. This method possessed the potential application for fast in situ screening of foodborne pathogens in food products.
研究领域:
纳米技术
·
生物技术
·
食品科学
·
分析化学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Sijie Liu,Renda Wang,Ping Yu,Kun Liang,Li Wang,Mengyu Gao,Yang Si,Chuang Zhu,Fangfang Ge,Bingsheng Li
In this study, molybdenum (Mo) coatings were deposited on 304 stainless steel (304SS) plates using magnetron sputtering. Subsequently, the samples were annealed at 800 °C under vacuum for varying durations to enhance adhesion strength and thermal stability. Immersion tests were conducted at 700 °C for up to 800 h. After 200 h of immersion, the weight loss of the annealed Mo-coated 304SS was significantly reduced from approximately 11 mg/cm 2 to about 0.44 mg/cm 2 . The Mo-enriched layer effectively suppressed the outward diffusion of alloy elements and facilitated the formation of Cr 2 O 3 by trapping Cr in the interdiffusion layer. Additionally, the Mo 3 Fe 3 O phase formed on the coating surface via diffusion reaction exhibited certain corrosion-resistant properties. Obvious interfaces emerged within the interdiffusion layer, and their formation mechanisms were analyzed. After four thermal cycles (with a 200-h interval), partial delamination of the Mo-enriched layer in the annealed Mo-coated 304SS was observed. This may have resulted from the substantial growth stress of Cr 2 O 3 and the significant mismatch in thermal expansion coefficient between Mo coating and 304SS.
研究领域:
材料科学
·
腐蚀工程
·
表面工程
·
可再生能源
·
冶金学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Panpan Wang,Wenquan Cui,Huan Wang,Weijia An,Shuo Zhao,Hongxia Guo
Hydrogen production by photoelectrocatalytic (PEC) decomposition of water is a promising pathway for green hydrogen acquisition. The construction of highly efficient and low-cost HER catalyst is the key to the commercialization of hydrogen production. Ni–Mo–B/TNTs (titanium dioxide nanotubes) nanocatalysts were prepared by a one-step electrodeposition method. Due to the synergistic effect of the nonmetallic B and the transition metal Ni–Mo, the composite photoelectrode exhibited a low overpotential and high stability in an alkaline electrolyte. Density functional theory (DFT) calculations confirmed that the ternary catalyst Ni–Mo–B/TNTs significantly optimized the adsorbed hydrogen intermediates, lowered the free-energy barriers of hydrogen adsorption, and facilitated the desorption of H 2 , which resulted in an enhancement of HER activity.
研究领域:
材料科学
·
催化
·
纳米技术
·
氢能
·
电化学
·
理论化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Conghan Zhang,Jiating Cheng,Fan Yang,Yang Sun,Xinyang Sun,Kexin Wei,Guang Ma,Junpu An,Meitong Zhao,Jiahui Liu,Yongfeng Li
Electrolytic water splitting using transition metal sulfide catalysts has garnered a lot of attention lately. Herein, a composite material consisting of Mo-doped Ni 3 S 2 nanoparticles supported on N-doped carbon layers with anchored Ni single atoms (Mo–Ni 3 S 2 /Ni–N–C) was synthesized using a two-step hydrothermal process. These features enable Mo–Ni 3 S 2 /Ni–N–C to achieve low overpotentials of 71, 58, and 89 mV for the hydrogen evolution reaction (HER) at 10 mA cm −2 in 1 M KOH, 0.5 M H 2 SO 4 , and 1 M PBS, respectively. After 20 h of durability testing, its current density retains over 95 % of the initial value across diverse pH electrolytes. Mo doping enhances structural stability, enabling wide pH applicability. Electron transfer from Ni 3 S 2 nanoparticles to Ni single atoms accelerates kinetics and boosts intrinsic activity, which improves HER performance. Theoretical calculations confirm that Ni single atoms possess ideal H∗ adsorption energy, which optimizes H∗ adsorption capability of Ni 3 S 2 . This work offers suggestions for creating excellent low-cost electrolytic water catalysts.
研究领域:
电化学
·
催化
·
材料科学
·
纳米技术
·
能量转换
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Xin Wu,Xingyu Xiong,Bin Yuan,Jun Liu,Renzong Hu
A good cycling stability is a prerequisite for the application of metal-based materials in lithium-ion batteries (LIBs). However, an abnormal increase in capacity is often observed, which has rarely been focused on in many studies. In our SnSe-Mo-C composite anode, a high reversible capacity of 737.4 mAh g −1 remained after 5000 cycles at 5 A g −1 between 0.01 and 3.0 V versus Li/Li + . However, a continuous capacity increase occurred in the initial cycles, with 1086.9 mAh g −1 after 1000 cycles and 1216.9 mAh g −1 after 1500 cycles, respectively. Further studies revealed that the electrolyte decomposed at high potentials (2.5–3.0 V) and provided additional capacities. The cut-off voltage and electrolyte filling were controlled, which eliminated the impact of electrolyte decomposition, prevented rapid capacity decay, and provided a stable cycling performance for SnSe-Mo-C anodes in LIBs. This work shows that the composite anode is promising for lithium storage and the findings provide new insights into understanding and controlling the phenomenon of capacity increase with cycling in metal-based anode materials.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）