The electrospun fibers were thermally treated to obtain carbon fibers, which were then chemically activated to improve the active sites for gas adsorption.
The new method considerably improves catalyst active sites in both electrodes and renders a high cathode porosity.
Such the point-shape distribution structure can improve the active sites to fully contact with the reactants, further promote the phase transformation of Pt0/Pt2+ and Ola/Oad, and finally maintain the normal operation of Pt0-PtO synergetic mechanism during toluene oxidation reaction.
At both sites treatments aimed to improve active range of motion, muscle strength and activities of daily living, such as walking capacity and climbing stairs".
Ni foam is widely used as the substrate to support metal oxides materials because of its good electrical conductivity and porous structure, which can enhance the electron transport and improve the active site of electrode materials.
This performance was attributed to more acidic sites and improved accessibility to active sites through larger pores, together with a higher mesoporous surface area and volume resulting from the hierarchical pore architecture and ceria modification.
Hierarchical nanocubes offer improved accessible surface active sites and optical/electronic properties, which act in concert to confer 200 300% rate-enhancements for the photocatalytic decomposition of organic pollutants and solar fuels.
Chemical composition engineering is one of the most valid approaches to regulate the active sites for improved activity.
Due to the hierarchical nanostructures, the enhanced number of active sites, improved electron conductivity and mass transport of the geometric constraint, the material shows high current density, low overpotential, and excellent anti-aggregation behaviors over a wide pH range (0 14) in HER.
Due to rapid surface diffusion and mass transfer, increased active sites, improved conductivity and strong synergetic coupling effects, the prepared HPMS Co3O4/CoS2 composite showed significantly enhanced electrocatalytic OER activities with a current density of 10 mA cm−2 at a low overpotential of 280 mV, a small Tafel slope of about 63 mV dec−1 and satisfactory stability at 20 mA cm−2.
