Effect of Pt Deposits on TiO2 Electrocatalytic Activity Highlighted by Electron Tomography
PBN-AR
Instytucja
Instytut Chemii Fizycznej Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
en
Czasopismo
ACS Applied Materials & Interfaces
ISSN
1944-8244
EISSN
Wydawca
AMER CHEMICAL SOC
DOI
URL
Rok publikacji
2019
Numer zeszytu
20
Strony od-do
18841-18848
Numer tomu
11
Link do pełnego tekstu
Identyfikator DOI
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Słowa kluczowe
en
electron tomography
nanotubes
TiO2
Pt nanoparticles
thin films
scanning transmission electron microscopy
Streszczenia
Język
en
Treść
Characterizing materials at small scales presents major challenges in the engineering of nano composite materials having a high specific surface area. Here, we show the application of electron tomography to describe the three-dimensional structure of highly ordered TiO2 nanotube arrays modified with Pt nanoparticles. The titanium oxide nanotubes were prepared by the electrochemical anodization of a Ti substrate after which Pt was deposited by magnetron sputtering. Such a composite shows high electro-chemical activity that depends on the amount of the metal and the morphological parameters of the microstructure. However, a TiO2 structure modified with metallic nanoparticles has never been visualized in 3D, making it very difficult to understand the relationship between electrocatalytic activity and morphology. In this paper, TiO2 nanotubes of different sizes and different amounts of Pt were analyzed using the electron microscopy technique. Electrocatalytic activity was studied using the cyclic voltammetry (CV) method. For selected samples, electron tomography 3D structure reconstruction was performed to describe their fine microstructure. The highest activity was detected in the sample having bigger nanotubes (25 V) where the porosity of the structure was high and the Pt content was 0.1 mg cm(-2). 3D imaging using electron tomography opens up new possibilities in the design of electrocatalytic materials.
Cechy publikacji
Original article
Original article presents the results of original research or experiment.
Oryginalny artykuł naukowy
Oryginalny artykuł naukowy przedstawia rezultaty oryginalnych badań naukowych lub eksperymentu.
Inne
System-identifier
PBN-R:918194
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