Synthesis of pomegranate-like Mo2C@C nanospheres for highly efficient microwave absorption

In situ Engineering of Hollow Porous Mo2C@C Nanoballs Derived From Giant Mo-Polydopamine Clusters as Highly Efficient Electrocatalysts for Hydrogen Evolution

“…From Figure 3A for Mo 2 C@C, besides the diffraction peaks from C, the other characteristic peaks are shown at 34.5, 38.0, 39.6, 52.3, 61.9, 69.8, 75.0, and 76.0 • , which can only be ascribed to the hexagonal β -Mo 2 C phase (JCPDF#35-0781) (Mir and Pandey, 2018). Moreover, according to previous work, the value (I D /I G =) of Mo 2 C@C is 1.07, implying that more unordered carbon should increase with rich defects in Mo 2 C@C, which promotes the activity (Wang Y. H. et al, 2019). Considering the TEM, XRD, XPS, and SEM results together, we can conclude that the porous Mo 2 C nanoballs were formed in the graphitic carbon.…”

“…(1) The hierarchical porous structure not only endows a high specific surface area and mitigates aggregation during carbonization process, but also facilitates efficient mass transfer of reactants and products, enhancing the HER performance (Park et al, 2018;Chen et al, 2019). 2The presence of C not only prevents the aggregation of Mo-based compounds, but also accelerates the rate of charge transfer during HER (Chen et al, 2016;Zhu et al, 2018;Wang Y. H. et al, 2019;Wang Y. Q. et al, 2019).…”

Solvent-Free Synthesis of Ultrafine Tungsten Carbide Nanoparticles-Decorated Carbon Nanosheets for Microwave Absorption

“…S5). That is to say, dielectric loss is the only pathway to attenuate incident EM energy [24,36]. respectively.…”

“…It is well known that either SiC or Ti 3 C 2 has very large particle size even up to several microns, which means that these carbides particles cannot fully contact with carbon matrix, and thus, the contribution from interfacial polarization may be insufficient in such carbon/carbide composites [29,32]. More recently, some attempts were made to decorate carbon matrix with some unconventional carbide particles, whose ultrafine particle size could generate good dispersion and abundant interfaces, resulting in a significant enhancement in microwave absorption [33][34][35][36][37]. For example, Dai et al pioneered the involvement of Mo 2 C nanoparticles in carbon matrix through the pyrolysis of Cu-Mo-based metal organic frameworks (MOFs) and the subsequent removal of Cu species, and they confirmed that the synergistic effect of carbon frameworks and Mo 2 C nanoparticles were responsible for the good reflection loss (RL) characteristics [34].…”

Excellent microwave absorption properties based on a composite of one dimensional Mo2C@C nanorods and a PVDF matrix

“…18,19 And the molybdenum carbides (Mo 2 C), as a representative early transition metal carbides, has also gained interest, owing to its excellent conductivity, chemical stability and tunable features connected with phase and composition. [20][21][22] Herein, on the basis of precursor product of 1D MoO 3 nanowires, the carbonation reaction was involved in the carbonbased material preparation process, and we nally obtained 1D structural Mo 2 C@C and lled in poly(vinylidene uoride) (PVDF) matrix to compound, treated consequently as the target microwave absorber. The Mo 2 C@C can not only keep the unique 1D structural characteristics, but also get enhancement of the dielectric properties and increase the polarization ability of the multiphase interface.…”