Nanostructural characterization and catalytic analysis of hybridized platinum/phthalocyanine nanocomposites

Abstract

Organic crystals, such as phthalocyanine nanocrystal, were successfully hybridized with Pt nanoparticles using a nanohybridization technique. The presence of highly dispersed Pt nanoparticles on the surface of phthalocyanine was confirmed by the combination of transmission electron microscopy and three-dimensional electron tomography. Catalytic activities of hybridized samples with different degrees of dispersions were also examined as oxygen reduction reactivity (ORR) with a linear potential sweep method. It was found that oxygen reduction activity increased with increasing Pt dispersion, and reasonably high ORR was observed on Pt-dispersed phthalocyanine nanocrystal even at 2 wt% Pt loading.

Simulation of a hollow cone-shaped probe in aberration-corrected STEM for high-resolution tomography

“…The confocal STEM technique which can also provide 3D structural information with higher depth resolution has been progressed [4][5][6][7][8]. Current electron microscopic analyses of 3D structures of specimens are mainly based on computer tomography (CT) [9][10][11][12], a technique that reconstructs 3D information using plural images taken from many directions. Although, in principle, each image is a projection of the potential distribution of the specimen along the optical axis, the actual images are not always ideal.…”

Recent Progress on Revealing 3D Structure of Electrocatalysts Using Advanced 3D Electron Tomography: A Mini Review

“…Other support materials have been investigated as well. Kaneko et al showed the distribution of Pt on phthalocyanine, and found that oxygen reduction activity increased with increasing Pt dispersion ( Kaneko et al, 2009 ). Sahin et al revealed the distribution of Cu nanoparticles on FDU-15 used for CO 2 reduction, and showed that nanoparticles found on the external surface of the FDU-15 were more affected by the Kirkendall effect during the oxidation ( Sahin, 2018 ).…”

Photoelectrochemical and Photocatalytic Properties of Biphasic Organic p- and n-Type Semiconductor Nanoparticles Fabricated by a Reprecipitation Process

“…It is therefore necessary to develop a new organic photocatalyst with low fabrication cost for practical use. The reprecipitation method reported by Kasai and co-workers − offers a potential pathway. This method is a wet process suitable for the preparation of various organic crystals whose sizes range from nanometers to micrometers in order to develop electronic and photonic devices.…”