Hierarchical Pt/NiO Hollow Microspheres with Enhanced Catalytic Performance

Abstract

Hierarchical macro-mesoporous Pt/NiO hollow microspheres are synthesized and used for catalytic decomposition of formaldehyde in air at room temperature. The uncalcined Pt-Ni(OH) 2 sample exhibits low catalytic activity.T he Pt/NiO sample heateda t3 00 8Cs hows significantly enhanced catalytic activity.T he Pt/NiO sample at 400 8Ce xhibits the highest catalytic activity,m ainly due to its bimodal macro-mesoporous structure with open and accessible pores, which provides al arge specific surface for HCHO ad-sorptiona nd Pt dispersion, enables the fast diffusion and transport of gas molecules,a nd ensures the accessibility of active sites on Pt nanoparticles for gas molecules. Moreover, all Pt/NiO hollow spheres have higher catalytic activity than Pt-decorated commercial NiO. The preparedh ierarchical macro-mesoporous Pt/NiO nanocomposite hollow microspheres should also find applications in adsorption, photocatalysis, electrocatalysis, separation, and purification processes.[a] Dr.

Core–Shell Nitrogen‐Doped Carbon Hollow Spheres/Co3O4 Nanosheets as Advanced Electrode for High‐Performance Supercapacitor

“…Moreover, the Co 3 O 4 /NHCS (the inset of Figure S5a, Supporting Information) exhibits a wider BJH porous size distribution than that of Co 3 O 4 ‐NRs. Thus, Co 3 O 4 /NHCS with much more open porous structure and larger surface area can provide much more electrochemical active sites for redox reaction and facilitate easier electrolyte ion penetration into the surface of active materials, which has great advantage over its rival Co 3 O 4 ‐NRs …”

A Computational Study on the Variation of Bandgap Due to Native Defects in Non-Stoichiometric NiO and Pd, Pt Doping in Stoichiometric NiO

“…Dopants, such Cu [32] and Li [33] enhance the p-type conductivity of NiO films and have been studied extensively, both theoretically and experimentally. Doping NiO with metals in the nickel family, i.e., Palladium (Pd) and Platinum (Pt), have gained attention, owing to their Electrochromic, supercapacitor, and gas-sensing applications and studied extensively experimentally [34][35][36][37][38][39][40], but no theoretical analysis has been investigated in knowing the vacancy and interstitial behavior in doped NiO. In this paper, we also study the effect of doping Pd and Pton the bandgap of NiO by varying doping concentrations from 0 to 25% in a 32 atom NiO.…”

Open‐mouth spherical g‐C3N4/Fe‐2, 5‐thiophenedicarboxylic acid hybrid photocatalyst for dye degradation and bacterial inactivation

“…(a)), whereas open‐mouth sphere morphology offers accessibility to both the interior and exterior surfaces which could lead to high catalytic performance due to the easy mass transport (Fig. (b)) . Materials with hallow spherical morphology exhibited better performance than conventional spherical materials in water splitting, CO 2 adsorption, oxidative decomposition of pollutants and dye sensitized solar cells .…”