International Journal of Electrochemical Science
·
2023
·
IF 1.5
Bin Liu,Xin-Yu Zhang,Tian-Shu Chen,Li-Ming Zhang,Xin-Lei Yang,Xue Ma,Di Liu
The development of stable and active electrocatalyst for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is of significant importance toward overall water splitting related with the conversion of sustainable energy sources. Herein, we report the synthesis of molybdate-directed Ni 3 S 2 heterogeneous nanorod arrays, in which the nanorods decorated with vertical nanosheets were densely and evenly covered on the surface of Ni foam. Benefiting from the abundant accessible active sites, accelerated charge transport, fast release of generated gas, and synergistic effect, the Mo doped Ni 3 S 2 nanorod arrays exhibits excellent activity toward both OER and HER, delivering current density of 100 mA.cm -2 at low overpotential of 350 mV for OER and 290 mV for HER, respectively. Moreover, such heterogeneous nanorods display a very low cell voltage of 1.83 V to approach 100 mA.cm -2 along with a favorable robustness for 10 h in an alkaline electrolyzer. Different characterizations including XRD and SEM revealed the influence of Mo doping on the growth of heterogeneous nanorods. Electrochemical measurements confirmed the superior activity of Mo doped Ni 3 S 2 originated from synergistic effect of Mo and Ni 3 S 2 . This work sheds light on the fabrication of versatile electrocatalysts for efficient energy conversion by demonstrating the novel design of heterogeneous nanorods as active catalysts.
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高影响因子
Small
·
2026
·
IF 11.8
Nazir Ahmad,Hussein A. Younus,Zafar A. K. Khattak,Adnan Ali Khan,Francis Verpoort
Metal–organic polyhedra (MOPs) are discrete and intrinsically porous molecular self-assemblies. MOPs exhibit rich surface chemistry; the existence of peripheral reactive sites is exploited by post-synthetic covalent and/or coordination-based polymeric structures by maintaining MOP identities. By further treatment, the dimensions of cuboctahedral MOPs are manipulated in an unprecedented manner into next-generation metal/metal oxides-doped carbon polyhedron nanocages/nanospheres. Herein, the predesigned mixed metal and metal oxides dopped carbon nanopolyhedral spheres/cages (M/MO@CNS) are obtained through the pyrolysis of MOPs. These composites are characterized by FTIR, Raman, PXRD, BET, ICP, XPS, FE-SEM, and TEM techniques. The spherical morphology of the nanomaterial is preserved as carbon spheres doped with metal-based nanoparticles (Cu 0 Co 0 /Cu 2 OCoO@CNS), demonstrating excellent electrocatalytic performance. Compared to commercial iridium oxide, the carbon nanospheres incorporating metals/metal oxides presented a high activity profile for alkaline water oxidation. Catalysts prepared at 600°C and 1000°C revealed maximum current densities, as compared to the commercial IrO 2 benchmark catalyst. The current densities of 10 mA/cm 2 recorded low overpotentials/η 10 and Tafel slopes than IrO 2, with lower charge transfer resistance. Combined post-catalysis analyses and DFT calculations demonstrate that the synergistic interaction within Cu 2 O/CoO@CNS optimizes the electronic structure and promotes electron transfer. It also balances the free energies of key intermediates and reduces the energy barrier of the OER rate-determining step, resulting in enhanced catalytic performance. The MOPs derived next-generation carbon-nanocages are tested for catalytic stability via chronopotentiometry, which shows that these composites remained stable during several hours of electrolysis.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Jie Chen,Silu Shi,Haotian Tan,Mengdi Wang,Xinyuan Zhang,Xiao Yan,Shuai Yan,Ji Liang
The electrochemical ammonia oxidation reaction (AOR) holds great promise due to its potentially low energy consumption and the production of high-value nitrites. However, achieving high efficiency and selectivity in the conversion of ammonia to nitrites remains a significant challenge owing to the diversity and competitiveness of reaction pathways. In this work, a NiCu-loaded Mo catalyst (denoted as Mo/NiCu) was synthesized via a simple hydrothermal method followed by high-temperature reduction. Comprehensive characterization and theoretical investigations reveal that the interfacial electronic interaction between Mo and the NiCu alloys effectively modulate the Fermi level of the NiCu catalyst, thereby enhancing ammonia adsorption and promoting the ammonia oxidation reaction. Electrocatalytic performance tests in a flow cell configuration demonstrate that the catalyst achieves 98% nitrite selectivity at 1.9 V and maintains stable operation for over 60 h. This study provides a new strategy for designing efficient, stable, and cost-effective AOR catalysts, thereby facilitating the practical application of electrocatalytic nitrite synthesis.
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PubMed
高影响因子
Sustainability
·
2026
·Vol. 18
·期 4
·1870
·
IF 4.1
Guodong Wan,Jiaqi Ding,Ruixin Zeng,Zhenbin Chen,Hua Li,Yujie Cheng,Zongping Wang,Pengchao Xie,Hongwei Zhang
Naproxen (NPX) is a widely occurring, refractory organic contaminant that cannot be removed by conventional water treatment processes. In response to the growing environmental pollution caused by NPX, an innovative and highly efficient green degradation method has been developed, designed on the principles of sustainability to promote long-term ecosystem health and advance a circular economy. In this study, using zero-valent molybdenum as a catalyst in combination with trivalent iron (Fe3+) and hydrogen peroxide (H2O2), we constructed a Mo/Fe3+/H2O2system to treat NPX-contaminated water. The effects of solution pH, H2O2concentration, Fe3+concentration, Mo dosage, and co-existing water-matrix constituents (Cl−, HCO3−, PO43−, NO3−, and humic acid (HA)) on NPX removal were investigated; reactive species were identified; and the reusability of Mo as well as its performance under the continuous-flow condition were evaluated. The results showed that the optimal pH was 3 and the appropriate Fe3+dosage is 100 µM. With 500 µM H2O2, 87.9% of NPX was removed within 7 min, and a moderate increase in Fe3+concentration, together with a suitable H2O2level, enhanced the removal efficiency. HCO3−, Cl−, and HA exerted slight inhibition, whereas PO43−markedly suppressed NPX degradation. Recycling tests and the 6 h continuous-flow treatment demonstrated excellent reusability and stability of Mo. Quenching experiments revealed that HO•and Fe(IV) were the dominant reactive species responsible for NPX degradation.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123719
·
IF 7.5
Jinfeng Zhi,Chunlan Lv,Lian Wang,Qiang Wang,Yujing Guo,Yingpu Bi,Lifang Fan
Efficient removal of organic pollutants is of great significance for the sustainable development of aquatic ecosystems. Herein, an effective integrated ternary photoanode, NiFe-LDHs/Mo-doped BiVO 4 , was designed by a simple two-step electrodeposition method. The designed ternary photoanode showed a significant negative shift of onset potential compared to pristine BiVO 4 photoanode, and its photocurrent density was approximately 4.5 times higher than that of pure BiVO 4 . Moreover, the photoelectrocatalytic removal ability of 2,4-dichlorophenol (2,4-DCP) was investigated under simulated sunlight irradiation. The prepared composite achieved a degradation efficiency of 92.0% in 180 min and showed good reusability. This study provides a promising strategy for the treatment of organic pollutants wastewater with photocatalysts.
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Meilan Pan,Xue Zhang,Chenglei Pan,Jiong Wang,Bingjun Pan
Strategies for harmonizing the construction of an active site and the building of electron transport for a hybrid MoS2 catalyst are crucial for its application in electrochemical reactions. In this work, an accurate and facile hydrothermal strategy was proposed to fabricate the active center of Co–O–Mo on a supported MoS2 catalyst by forming a CoMoSO phase on the edge of MoS2, yielding (Co–O)x-MoSy (x = 0, 0.3, 0.6, 1, 1.5, or 2.1). The results show that the electrochemical performances (hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and electrochemical degradation) of the yielded MoS2-based catalysts were positively correlated with the Co–O bonds, verifying the significant role of Co–O–Mo as the active center. The fabricated (Co–O)-MoS0.9 presented an extremely low overpotential and Tafel slope in both HER and OER, and it also demonstrated excellent BPA removal in the electrochemical degradation reaction. As compared with the Co–Mo–S configuration, the configuration of Co–O–Mo not only serves as the active center but also provides a conducting channel to facilitate electron conductivity with more accessible charge transfer at the electrode/electrolyte interface, which is favorable for electrocatalytic reaction. This work offers a new perspective for the active mechanism of metallic-heteroatom-dopant electrocatalysts and further boosts research on the development of noble/non-noble hybrid electrocatalysts in the future.
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高影响因子
AIP Advances
·
2023
·Vol. 13
·期 5
·
IF 1.6
Zhang Lan,Yu Shiyao,Ma Huizhong,Zhu Mingcheng,Zhang Jidong
The fabrication of ZrC–Mo composites with (10–25 vol. %) Mo content using a spark plasma sintering at 1750 °C under 35 MPa was investigated in this research. The effects of adding various Mo contents on the composites were also examined. The microstructure and phase analysis were investigated by scanning electron microscopy, x-ray diffractometer, and energy dispersive spectroscopy. Microscopic analysis revealed that the addition of metal Mo resulted in making the ceramic particles of ZrC finer, the sintered products denser, and the sintering conditions softer. Moreover, a continuous solid solution forms in the composite as the Mo content rises, the (Zr, Mo)C and (Zr, Mo) 2 C start to generate, and thus solid solution strengthens the material. The addition of metal Mo reduced the grain size of the ceramic composite and also lead to fine-grain strengthening. With a relative density of 97.53%, a Vickers hardness of 23.88 GPa, and a flexural strength of 317.55 MPa, the composite possessed the best properties when the molybdenum volume fraction reaches 15 vol. %. The synergistic effect of fine grain strengthening and solid solution strengthening improved the mechanical behavior of the composite.
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Zhenchao Tao,Jingguo Wang,Haitao Wu,Jiaru Hu,Lu Li,Yuhang Zhou,Qi Zheng,Lisha Zha,Zhengbao Zha
In response to diffused ionizing radiation damage throughout the body caused by nuclear leaks and inaccurate radiotherapy, radioprotectants with considerable free radical scavenging capacities, along with negligible adverse effects, are highly regarded. Herein, unlike being performed as toxic chemotherapeutic drug candidates, molybdenum-based polyoxometalate nanoclusters (Mo-POM NCs) were developed as a non-toxic potent radioprotectant with impressive free radical scavenging capacities for ionizing radiation protection. In comparison to the clinically used radioprotectant drug amifostine (AM), the as-prepared Mo-POM NCs exhibited effective shielding capacity by virtue of their antioxidant properties resulting from a valence shift of molybdenum ions, alleviating not only ionizing radiation-induced DNA damage but also disruption of the radiation-sensitive hematopoietic system. More encouragingly, without trouble with long-term retention in the body, ultra-small sized Mo-POM NCs prepared by the mimetic Folin–Ciocalteu assay can be removed from the body through the renal-urinary pathway and the hepato-enteral excretory system after completing the mission of radiation protection. This work broadened the biological applications of metal-based POM chemotherapeutic drugs to act as a neozoic radioprotectant.
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高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Jie Yuan,Hui Zhao,Ruizhuo Ouyang,Yuqing Miao
In this work, nanorod bundles of Ni-Mo-O were synthesized within nickel foam (NF) using a conventional hydrothermal method, which was the further vulcanized to form Ni-Mo-S upon doping sulfur. The NF/Ni-Mo-O and NF/Ni-Mo-S materials were characterized in terms of their morphology, composition and electrochemical properties. NF/Ni-Mo-O showed excellent performance as a supercapacitor. In addition, NF/Ni-Mo-S catalyzed the electrochemical oxidation of glucose in alkaline medium, exhibiting its potential application as a new fuel cell. Their excellent electrochemical performances greatly benefited from the preferred activity of NF/Ni-Mo-O and NF/Ni-Mo-S, efficient electron transfer over the electrode and high conductivity of NF.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 9
·096514
·
IF 4.386
Zhijie Pan,Pengwei Huang,Yuanming Zhang,Xionghui Fu,Yi Zhu
Photoelectrocatalytic methanol oxidation to formaldehyde by using electric/solar energy is a promising technology. In this work, Ag nanoparticles were decorated on Mo-doped BiVO4 to synthesize Ag/Mo: BiVO4 catalyst. As expected, benefitting from Mo-dopant and plasmonic effect of Ag nanoparticles, formaldehyde production of Ag/Mo: BiVO4 photoanode was 2.2 times higher than pristine BiVO4 photoanode. Faradaic efficiency increased from 19% to 49% in comparison with the pure BiVO4 photoanode.
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高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 18
·4642-4650
·
IF 7.779
Pingping Chen,Xiaohui Wang,Rui Yu,Yu Gu,Yuchao Lyu,Yupeng Tian,Jianye Fu,Xinmei Liu
Mo dispersion is the key factor promoting the performance of an Mo/ZSM-5 catalyst for the methane dehydroaromatization (MDA) reaction. Citric acid (CA) was introduced during the conventional wetness impregnation step to ameliorate the Mo dispersion over the Mo/ZSM-5 catalyst. After introducing CA, all catalysts bear high crystallinity relative to that of ZSM-5 zeolite, which proves that CA treatment does not damage the physical structure of catalysts. CA introduction also enhances the Mo dispersion significantly. The metal particle size of 3Mo/ZSM-5-CA1.5 (sample with an Mo loading of 3 wt% and nCA : nMo ratio of 1.5) is within 5–15 nm and is lower than that of pristine 3Mo/ZSM-5 (within 10–20 nm). The role of CA in improving Mo dispersion can be further certified by the higher band gap energy of molybdenum atoms, the higher proportion of surface oxygen in molybdenum oxide and the fewer Brønsted acid sites for the catalysts prepared with the aid of CA. High Mo dispersion contributes to the high activity and selectivity of the catalysts. The aromatic yield of 3Mo/ZSM-5-CA1.5 is almost twice that of pristine 3Mo/ZSM-5. The improvement of Mo dispersion is attributed to the chelation between CA and Mo species, leading to the subsequent isolation of the active components during calcination. Moreover, this effect is more distinct for the catalysts with higher Mo loading. When Mo loading increases to 9 wt%, the aromatic selectivity of 9Mo/ZSM-5-CA1.5 is more than 93% and the coke resistance is obviously elevated compared to that of a catalyst prepared without CA. Based on the above findings, it is clear that adding CA during the Mo/ZSM-5 preparation is an effective way to improve Mo dispersion.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Xiang Li,Huimin Yang,Xiafen Hu,Qirui Wu,Weiqiang Xiong,Ziyu Qin,Changsheng Xie,Dawen Zeng
It is well known that the metal atoms of metal oxide semiconductor (MOS) exhibit significant activity in gas sensing. However, limited by the shielding effect of the outer oxygen atom layer, layered MoO 3 is often difficult to show ideal gas adsorption activity. Hence, the MoO 3 microporous nanoflowers (MPNFs) assembled by porous two-dimensional nanosheets were successfully synthesized and exhibited excellent gas sensing performance to H 2 S, and the response was 7.2 times higher than that of simple MoO 3 nanosheets. The abundant pores of MoO 3 MPNFs were due to the influence of the crystal cell shrinkage effect on the atomic arrangement, while the significantly enhanced gas sensing performance was attributed to the positive effect of the microporous structure on gas diffusion and the exposed edge Mo atoms. This was confirmed by DFT calculation results that, compared to the Mo atoms on the surface of MoO 3 nanosheets, the Mo atoms around the pores were exposed because they broke through the shielding effect of the oxygen atom layer and exhibited higher adsorption activity for H 2 S and O 2 molecules. Therefore, this work can shed a light on the design of high-performance gas sensors based on metal oxides .
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高影响因子
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