APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Yingxue Du,Qichang Li,Linping Han,Pengfei Yang,Liantao Xin,Wei Jin,Weiping Xiao,Zhenjiang Li,Jinsong Wang,Zexing Wu,Lei Wang
Designing efficient and robust pH-universal electrocatalysts for hydrogen evolution reaction (HER) is the key to boost the development of eco-friendly hydrogen energy. Herein, metallic Mo, Ru coupled with graphitic carbon dots (GQDs) activate inertness 1D copper-based nanowires (GQDs@ Ru, Mo-Cu 2 O/CF) by surface chemical oxidation, solvothermal and low temperature calcination . The metals of Mo, Ru favor the water-dissociation and optimize the hydrogen adsorption/desorption. In addition, GQDs owns edge effect and good conductivity, and then benefiting electron transport and active sites exposure. Therefore, the synthesized GQDs@ Ru, Mo-Cu 2 O/CF requires only 30, 39, 17 and 55 mV in alkaline, acidic, alkaline seawater and neutral to achieve 10 mA cm −2 . Moreover, the assembled electrolyzer requires 1.58 V to reach 10 mA cm −2 in alkaline seawater, and maintained well at 200 mA cm −2 for 100 h. This research opens a new avenue for designing efficient catalysts on energy-relation applications through introducing both metal and non-metal.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2024
·
IF 7.6
Nana Zhu,Lu Zhu,Baojing Zhang,Peizhong Feng,Shiheng Li,Philipp V. Kiryukhantsev-Korneev,Evgeny A. Levashov,Xuanru Ren,Xiaohong Wang
An innovative two-step approach of self-propagating high-temperature synthesis (SHS) and spark plasma sintering (SPS) was developed to rapidly fabricate MoSi 2 and Mo(Al,Si) 2 ceramics for high-temperature anti-oxidation applications. The SHS process predominantly promoted the synthesis of high-purity and high-yield MoSi 2 and Mo(Si,Al) 2 phases in the alloyed powders. Subsequently, dense and crack-free MoSi 2 and Mo(Al,Si) 2 ceramics were produced using SPS. 1500 °C oxidation tests of the ceramics (100 h) revealed the formation of a protective SiO 2 oxide layer on the surface of MoSi 2 ceramics, while an Al-Si-O composite glassy oxide layer formed on Mo(Si,Al) 2 ceramics, which exhibited better thermal stability and lower oxygen permeability compared to the single SiO 2 oxide layer. However, an excessive Al content (>0.05 at.%) compromised the oxidation resistance due to the emergence of a Si-depleted Mo 5 (Si,Al) 3 layer with inferior oxidation resistance, which was caused by the high-temperature diffusion of Si. Therefore, via this novel two-step SHS-SPS technique compact and crack-free Mo(Si,Al) 2 ceramics can be rapidly synthesized at high temperatures. When trace amount of Al was added (0.05 at.%), Mo(Si 0.95 Al 0.05 ) 2 showed optimum high-temperature oxidation resistance.
研究领域:
材料科学
·
高温结构材料
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yanan Huang,Yan Zhao,Dawei Song,Yaqin Shi,Huan Chen,Bo Niu,Donghui Long,Yayun Zhang
This study uncovers a synergistic Fe-Mo dual-atom catalytic mechanism that enhances peroxymonosulfate (PMS) activation and pollutant degradation through dynamic electron management and substrate pre-activation. A nitrogen-doped carbon-supported FeMo dual-atom catalyst (FeMo/NC) was synthesized and systematically analyzed using XAFS, in situ Raman, DFT calculations, and electrochemical tests. The FeMo/NC-PMS system achieved 99 % ciprofloxacin (CIP) degradation within 10 minutes (rate constant: 0.402 min −1 ), maintained > 90 % efficiency across pH 1–13, and exhibited minimal Fe/Mo leaching (<0.1 ppm) with 90 % retention after five cycles. Mechanistic studies revealed that Mo stabilizes Fe valence states via electron transfer, strengthens Fe-N coordination, and promotes pollutant pre-activation on Mo sites while enabling selective 1 O 2 generation at Fe sites. This work establishes a dual-atom design strategy to optimize electron redistribution and interfacial interactions in Fenton-like systems. The demonstrated compatibility with membrane filtration (100 % CIP removal in wastewater) highlights its potential for practical water remediation applications.
研究领域:
环境科学
·
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Materials
·
2022
·
IF 3.985
Yang Jiangping,Zhang Zhe,Sun Siyuan,Wang Cheng
The development of transition metal oxides (TMOs) as electrocatalysts for oxygen evolution reaction (OER) has the potential to surpass the performance of noble-metal-based catalysts. In this work, a quenching rapidly strategy was used to synthesize Mo-modified Co3O4 nanosheet arrays as advanced catalysts. The resulting Mo-Co3O4 electrodes showed superior activity and reaction kinetics, with an overpotential of only 341 mV to drive a current density of 100 mA cm−2 and a Tafel slope of 69.0 mV dec−1. This improved performance is thought to be due to the formation of high-valence Co sites, which creates a synergistic effect. The ability to regulate the synthesis without causing obvious agglomeration and nucleation growth during annealing makes this method a promising approach for the design of other advanced functional materials.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Fekadu Tadesse Bekena,Dong-Hau Kuo,Worku Lakew Kebede
Wastewater treatment becomes an important part to improve environmental quality and protect water resources. Thus, developing a new photocatalyst is a key solution for environmental issues. Herein, universal, highly efficient, and novel Bi 2 (O,S) 3 /Mo(O,S) 2 nanocomposite photocatalyst was fabricated by a facile method and the crystal structure, morphology, composition, and optical properties of the as-prepared catalysts were characterized in details. The photocatalytic performance of the catalysts was evaluated by the photodegradation of methyl orange (MO), rhodamine B (RhB), methylene blue (MB), and neutral red (NR), the results showed that 20% Bi-MoOS nanocomposite had excellent photodegradation activity towards all dyes. 96.0% of MO, 96.6% of RhB, 98.8% of MB and 91.3% of NR dyes were removed after 180 min, 40 min, 20 min, and 25 min visible light irradiation, respectively. The photodegradation of these dyes was further confirmed with HPLC. The excellent photocatalytic activity of the nanocomposites was due to the efficient separation and transport of photogenerated charge carriers induced by the fabricated binary heterostructures. The photodegradation fitted well the pseudo-first-order kinetics. The active species capture experiment study showed that, OH, O 2 − and h + all took parts in the degradation of dyes. The stability of the catalyst and reaction mechanism also explained in this work.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xinyue Mao,Qingnan Meng,Mu Yuan,Sifan Wang,Shiyin Huang,Yuting Qiu
Fe-based diamond -composites exhibit considerable potential for applications owing to their excellent mechanical and wear properties. However, the weak interfacial bonding between the Fe-based matrix and diamond particles has consistently limited their overall performance, adversely affecting the working efficiency of diamond tools. In this study, a Mo-B-C coating was pre-coated on the diamond surface. During the sintering process, the in-situ gradient chemical reaction between Fe and Mo-B-C coating resulted in the formation of a biomimetic ‘brick-mud’ interfacial structure consisting of Mo 2 FeB 2 , Mo 2 BC, and amorphous carbon layers. The “brick-mud” structure, combining soft and hard phases, enhanced the interfacial toughness by effectively deflecting, branching, and prolonging interfacial cracks. Additionally, the transitional diffusion of Fe within the interface layer helpd alleviate the interfacial stress concentration and suppress diamond graphitization. As a result, the optimization of interface bonding contributed to a 26.1 % increase in bending strength and a 156 % enhancement in abrasive ratio of the Fe-based diamond composites, offering a novel strategy for interfacial modification in Fe-based diamond tools.
研究领域:
材料科学
·
复合材料
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表面工程
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力学性能
·
耐磨性
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Jingting Sun,Shangshang Wang,Xingyu Liu,Huan Yu,Jiaming Li,Chao Liu,Qinfang Zhang,Zhigang Zou
Photocatalytic hydrogen production (PHE) technology has emerged as a sustainable approach to convert solar energy into hydrogen energy, exhibiting significant potential for clean energy applications. In this study, an ultrasonic-assisted method was adopted to fabricate S-scheme MoSe 2 /Mn 0.5 Cd 0.5 S (MoSe 2 /MCS) composites, where intimate heterostructures are formed through interfacial Mo–S bonds between MCS and MoSe 2 . The atomic-level Mo–S bonds establish charge transport pathways and enable directional control of charge transfer. The as-constructed S-scheme MoSe 2 /MCS photocatalysts exhibit two critical advantages: enhanced charge carrier separation rate and improved overall redox capacity. Under visible-light irradiation, the MoSe 2 /MCS composites significantly outperform pure MCS in PHE performance. The optimal 5-MoSe 2 /MCS composite demonstrates the superior PHE activity, achieving an apparent quantum yield value of 71.16 % at 400 nm and remarkable photocatalytic stability. Key characterization techniques, including (solution-based) time-resolved photoluminescence technique, theoretical calculation, photoelectrochemical measurements, were employed to elucidate the positive correlation between ion-carrier interaction and charge separation efficiency, thereby enhancing the PHE performance. Based on experimental analysis and theoretical calculation, a plausible PHE mechanism for the S-scheme MCS composites is revealed and discussed in detail. These findings provide valuable insights for designing high-efficiency S-scheme heterostructured composites with interfacial chemical bonds.
研究领域:
材料科学
·
物理化学
·
纳米催化
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能源材料
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
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
危险品化学品经营许可证（带存储）