From MoO<sub>3</sub> Nanobelts to MoO<sub>2</sub> Nanorods: Structure Transformation and Electrical Transport

Hu, Bin; Mai, Liqiang; Chen, Wen; Yang, Fan

doi:10.1021/nn800844h

Cited by 234 publications

(171 citation statements)

References 31 publications

(44 reference statements)

Supporting

Mentioning

157

Contrasting

Unclassified

Order By: Relevance

“…15,16 It does not have a variety of technological applications such as MoO3 but there are some interesting approaches for usage as anode material in lithium-ion batteries, 15,[17][18][19][20] films for energy storage, 21 soft-magnetic and optical materials, [22][23][24] and as nanorods. 22,25 The synthesis of other oxides with metal ions in just one oxidation state probably cannot be achieved by conventional chemical methods, like oxidation or reduction. Another approach to prepare new compounds is the usage of high pressure on existing binary oxides.…”

Section: Introductionmentioning

confidence: 99%

HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide

et al. 2017

View full text Add to dashboard Cite

High-pressure molybdenum dioxide (HP-MoO2) was synthesized using a multi-anvil press at 18 GPa and 1073 K, as motivated by previous first-principles calculations. The crystal structure was determined by single-crystal X-ray diffraction. The new polymorph crystallizes isotypically to HP-WO2 in the orthorhombic crystal system in space group Pnma and was found to be diamagnetic. Theoretical investigations using structure optimization at density-functional theory (DFT) level indicate a transition pressure of 5 GPa at 0 K and identify the new compound as slightly metastable at ambient pressure with respect to the thermodynamically stable monoclinic MoO2 (α-MoO2; ΔEm = 2.2 kJ·mol -1 ).

show abstract

Section: Introductionmentioning

confidence: 99%

HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Molybdenum oxide is a suitable candidate in many of these applications due to its unusual chemistry produced by multiple Mo valence states (IV, V and VI) and a rich variety of crystallographic structures [3,4]. MoO 2 , with its distorted rutile structure, presents a high metal-like conductivity [5] and it finds uses as anode material in solid oxide fuel cells [6].…”

Section: Introductionmentioning

confidence: 99%

Structurally and mechanically tunable molybdenum oxide films and patterned submicrometer structures by electrodeposition

Quintana

Varea

Guerrero

et al. 2015

Electrochimica Acta

View full text Add to dashboard Cite

Abstract1.5 m-thick molybdenum oxide films have been electrodeposited potentiostatically from 0.2 M Na 2 MoO 4 electrolyte onto indium tin oxide (ITO)/glass substrates at pH = 1, 6 and 9. The influence of cetyltrimethylammonium bromide (CTAB) surfactant on films' adhesion, morphology, degree of porosity, molybdenum speciation, and crystallographic structure has been systematically investigated. The addition of CTAB (0.01 M) to the bath clearly improves film adherence to the substrate, reduces cracking, and increases crystallinity. This has an impact on the physical properties of the films. In particular, both hardness (H) and Young's modulus (E) increase, as determined from nanoindentation tests.The growth of ordered arrays of molybdenum oxide submicrometer structures, including pillars and stripes, by electrodeposition onto e-beam lithographed Au/Ti/Si substrates is also reported.

show abstract

“…Recently, various molybdenum oxides have been prepared through different methods. Generally speaking, MoO 2 can be obtained via the reduction of MoO 3 under a H 2 atmosphere [8,9]. However, few reports focused on the preparation of molybdenum oxide nanostructures from organic -inorganic hybrids.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Mo-based nanostructures from organic-inorganic hybrid with enhanced electrochemical for water splitting

Yang

Wang

2015

Sci. China Mater.

View full text Add to dashboard Cite

scarcity and high cost of Pt severely hinder their practical application. Recently, various molybdenum-based compounds, such as MoS 2 , MoSe 2 , Mo 2 C, and MoP, are promising non-noble-metal candidates due to their comparable HER activity to Pt-based catalysts [15][16][17]. Among them, Mo 2 C, as a typical interstitial alloys material, has similar metallic structures and possesses Pt-like catalytic behaviors. The traditional synthesis method usually involves the mix of metals with carbon and subsequent carbonization under high temperature to form Mo 2 C structure, which results in serious aggregation and compromises their performance. Recently, various morphologies of Mo 2 C nanostructure with excellent HER performance have been developed through various methods [18][19][20][21][22][23]. Sun and coworkers [24] synthesized closely interconnected network of molybdenum phosphide nanostructure with highly efficient electrocatalyst for HER. Tang's group reported that nanoporous Mo 2 C can be obtained by thermal decomposition process under an inert atmosphere, which was used as a very effective electrocatalyst for generating hydrogen from water [25,26]. In addition, Sasaki's group demonstrated that small Mo 2 C nanoparticles loaded on carbon nanotubes showed highly active and durable electrocatalyst for HER [27]. Evidently, these results suggest that Mo 2 C can be used as an effective electrocatalyst for water splitting.Recently, the formation of MoO 2 with carbon materials such as graphene was used to further improve the performance of MoO 2 [28][29][30][31]. For example, Mai's group [32] synthesized ultrathin MoO 2 nanosheets encapsulated carbon matrix with a facile thermal reduction method, which showed high specific capacities and enhanced cycling stability. Li and co-workers [33] fabricated flawed MoO 2 nanobelts on graphene with enhanced HER performance. However, few reports focus on constructing heterocomposite Mo 2 C with MoO 2 . Compared with those of the corresponding homogeneous materials, these heterostructured A simple method to fabricate Mo-based nanostructures were developed by the thermal decomposition of MoOx-based organic-inorganic hybrid nanowires. Well-defined Mo-based nanostructures, including MoO2 and MoO3 nanowires, can be prepared by changing the hybrid precursor. More importantly, Mo2C/MoO2 heterostructures with porous structure were successfully synthesized under an inert atmosphere. The resultant Mo2C/ MoO2 heterostructures show enhanced electrocatalytic activity and superior stability for electrochemical hydrogen evolution from water. The enhanced performance might be ascribed to the high electrical conductivity and porous structures with one-dimensional structure. Indeed, our result described here provides a new way to synthesize other Mo-based nanostructures for various applications.

show abstract

From MoO₃ Nanobelts to MoO₂ Nanorods: Structure Transformation and Electrical Transport

Cited by 234 publications

References 31 publications

HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide

HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide

Structurally and mechanically tunable molybdenum oxide films and patterned submicrometer structures by electrodeposition

Synthesis of Mo-based nanostructures from organic-inorganic hybrid with enhanced electrochemical for water splitting

Contact Info

Product

Resources

About

From MoO3 Nanobelts to MoO2 Nanorods: Structure Transformation and Electrical Transport

Cited by 234 publications

References 31 publications

HP-MoO2: A High-Pressure Polymorph of Molybdenum Dioxide

HP-MoO2: A High-Pressure Polymorph of Molybdenum Dioxide

Structurally and mechanically tunable molybdenum oxide films and patterned submicrometer structures by electrodeposition

Synthesis of Mo-based nanostructures from organic-inorganic hybrid with enhanced electrochemical for water splitting

Contact Info

Product

Resources

About

From MoO₃ Nanobelts to MoO₂ Nanorods: Structure Transformation and Electrical Transport

HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide

HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide