Co-Assembly of Nanoparticles in Evaporating Aerosol Droplets: Preparation of Nanoporous Pt/TiO2Composite Particles

Autor:	Franklin Kim, Kuk Cho, Kwonnam Sohn, Hee Dong Jang, Hankwon Chang, Jiaxing Huang
Rok vydání:	2010
Předmět:	Colloid Materials science Chemical engineering Nanoporous Composite number Environmental Chemistry Nanoparticle Particle General Materials Science Carbon black Electrocatalyst Pollution Aerosol
Zdroj:	Aerosol Science and Technology. 44:1140-1145
ISSN:	1521-7388 0278-6826
DOI:	10.1080/02786826.2010.514964
Popis:	Nanoporous Pt/TiO2 micro-particles were synthesized via an aerosol assisted co-assembly (AACA) route. Aerosol droplets were produced from a colloidal mixture of 5 nm Pt and 20 nm TiO2 nanoparticles, which formed spherical micro-aggregates of Pt and TiO2 with average diameter of around 1.2 μm. The resulting composite micro-particles have very open structure with pore sizes ranging from 20 to 200 nm. Pt nanoparticles were found to be well dispersed on the surface of the supporting TiO2 particles. Electrocatalytic application of the nanoporous Pt/TiO2 composites was examined through methanol oxidation reaction. The performance of 20 wt% Pt/TiO2 particles was found to be comparable to that of commercial 20 wt% Pt/carbon black catalyst.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9e9b9aae613152f96c941b0359203886 https://doi.org/10.1080/02786826.2010.514964 Zobrazit plný text záznamu