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In the present paper, density functional theory calculations were carried out on a detailed oxygen reduction reaction (ORR) process catalysed by nitrogen-doped β-graphyne (βGy). Nitrogen-doping can increase the positive charge of the adjacent carbon atom and the graphyne work function, promoting O2 decomposition. Our calculations revealed that N-doped βGy can efficiently facilitate the ORR process...
Aligned carbon nanotube (CNT) arrays are promising candidates for strain sensors owing to their scalable preparation and excellent conductivity and stretchability. However, aligned CNT arrays are limited by low strain sensitivity and buckling deformation. In addition, cross-stacked CNT array films layer-by-layer assembled on soft substrates exhibit anisotropic mechanical behavior due to their asymmetric...
The composite films of metal sulfide (MS, M=Ni, Co) nanoparticles (NPs)/graphene films were proposed to be novel transparent conductive oxide- and platinum (Pt)-free counter electrodes with high electrocatalytic activity for dye-sensitized solar cells (DSSCs). Such DSSCs show higher photovoltaic conversion efficiencies of 5.25% (NiS/graphene) and 5.04% (CoS/graphene), compared with 5.00% for (Pt/fluorine-doped...
A novel two-step process combining surface catalyzed process with segregation growth was used to prepare single crystal hexagonal bilayer graphene domains on Cu metal substrates by ambient pressure chemical vapor deposition. Carbon atoms are first dissolved into the quasi-melting Cu metal at 1080°C and then segregated on the Cu surface to form nucleation centers of single-layer graphene during cooling...
Microphase-separated styrene–butadiene–styrene (SBS) triblock copolymer was utilized as a template for the selective self-assembly of polystyrene (PS)-functionalized carbon nanotubes (CNTs) in the PS phase. It was also found that PS-functionalized CNTs could be accommodated in the PS phase of SBS regardless of the molecular weight of the PS ligand. This is different from the case for assembling nanoparticles...
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