Understanding iridium oxide nanoparticle surface sites by their interaction with catechol

2017 ◽  
Vol 19 (24) ◽  
pp. 16151-16158 ◽  
Author(s):  
Daniel Finkelstein-Shapiro ◽  
Maxime Fournier ◽  
Dalvin D. Méndez-Hernández ◽  
Chengchen Guo ◽  
Monica Calatayud ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Iridium Oxide ◽  
Surface Sites ◽  
Nanoparticle Surface ◽  
Oxide Nanoparticle

We report the first method to quantitatively understand the optical and catalytic properties of IrOx nanoparticles.

scholarly journals Gas Sensing with Iridium Oxide Nanoparticle Decorated Carbon Nanotubes

Sensors ◽  
2018 ◽  
Vol 19 (1) ◽  
pp. 113 ◽  
Author(s):  
Juan Casanova-Cháfer ◽  
Eric Navarrete ◽  
Xavier Noirfalise ◽  
Polona Umek ◽  
Carla Bittencourt ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensing ◽  
Metal Oxide Nanoparticles ◽  
Iridium Oxide ◽  
Oxide Nanoparticles ◽  
Step Method ◽  
Experimental Conditions ◽  
Multi Wall Carbon Nanotubes ◽  
Condensation Growth ◽  
Oxide Nanoparticle

The properties of multi-wall carbon nanotubes decorated with iridium oxide nanoparticles (IrOx-MWCNTs) are studied to detect harmful gases such as nitrogen dioxide and ammonia. IrOx nanoparticles were synthetized using a two-step method, based on a hydrolysis and acid condensation growth mechanism. The metal oxide nanoparticles obtained were employed for decorating the sidewalls of carbon nanotubes. Iridium-oxide nanoparticle decorated carbon nanotube material showed higher and more stable responses towards NH3 and NO2 than bare carbon nanotubes under different experimental conditions, establishing the optimal operating temperatures and estimating the limits of detection and quantification. Furthermore, the nanomaterials employed were studied using different morphological and compositional characterization techniques and a gas sensing mechanism is proposed.

Biological and environmental media control oxide nanoparticle surface composition: the roles of biological components (proteins and amino acids), inorganic oxyanions and humic acid

2015 ◽  
Vol 2 (5) ◽  
pp. 429-439 ◽  
Author(s):  
Imali A. Mudunkotuwa ◽  
Vicki H. Grassian
Keyword(s):  
Amino Acids ◽  
Humic Acid ◽  
Surface Composition ◽  
Environmental Matrices ◽  
Environmental Media ◽  
Media Control ◽  
Nanoparticle Surface ◽  
Oxide Nanoparticle

Evolution of nanoparticle surface composition in increasingly complex biological and environmental matrices.

Observing the colloidal stability of iron oxide nanoparticlesin situ

Nanoscale ◽  
2019 ◽  
Vol 11 (27) ◽  
pp. 13098-13107 ◽  
Author(s):  
Ryan Hufschmid ◽  
Eric Teeman ◽  
B. Layla Mehdi ◽  
Kannan M. Krishnan ◽  
Nigel D. Browning
Keyword(s):  
Iron Oxide ◽  
Scanning Transmission Electron Microscopy ◽  
Colloidal Stability ◽  
Iron Oxide Nanoparticle ◽  
Nanoparticle Surface ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Liquid Cell ◽  
Oxide Nanoparticle

Iron oxide nanoparticle surface chemistry controls growth and dissolution, which are observed in real-time usingin situliquid cell Scanning Transmission Electron Microscopy (STEM).

scholarly journals Visible Photoelectrochemical Water Splitting Based on a Ru(II) Polypyridyl Chromophore and Iridium Oxide Nanoparticle Catalyst

2015 ◽  
Vol 119 (29) ◽  
pp. 17023-17027 ◽  
Author(s):  
Katherine E. Michaux ◽  
Alessa A. Gambardella ◽  
Leila Alibabaei ◽  
Dennis L. Ashford ◽  
Benjamin D. Sherman ◽  
...  
Keyword(s):  
Water Splitting ◽  
Iridium Oxide ◽  
Photoelectrochemical Water Splitting ◽  
Oxide Nanoparticle ◽  
Nanoparticle Catalyst

From Al2O3-supported Ni(II)–ethylenediamine complexes to CO hydrogenation catalysts: Characterization of the surface sites and catalytic properties

2009 ◽  
Vol 362 (1-2) ◽  
pp. 34-39 ◽  
Author(s):  
Eric Marceau ◽  
Axel Löfberg ◽  
Jean-Marc Giraudon ◽  
Fabien Négrier ◽  
Michel Che ◽  
...  
Keyword(s):  
Co Hydrogenation ◽  
Catalytic Properties ◽  
Hydrogenation Catalysts ◽  
Surface Sites ◽  
Supported Ni

Synthesis and Evaluation of Iridium Oxide Nanoparticle Catalysts Supported on Nitrogen-Doped Reduced Graphene Oxides

2018 ◽  
Vol 85 (11) ◽  
pp. 27-35 ◽  
Author(s):  
Masanori Hara ◽  
Rajashekar Badam ◽  
Guan Jhong Wang ◽  
Hsin-Hui Huang ◽  
Masamichi Yoshimura
Keyword(s):  
Iridium Oxide ◽  
Graphene Oxides ◽  
Nanoparticle Catalysts ◽  
Nitrogen Doped ◽  
Reduced Graphene ◽  
Oxide Nanoparticle ◽  
Reduced Graphene Oxides

Precisely modulating the surface sites on atomically monodispersed gold-based nanoclusters for controlling their catalytic performances

Nanoscale ◽  
2020 ◽  
Vol 12 (35) ◽  
pp. 18004-18012
Author(s):  
Yongnan Sun ◽  
Xinglian Cheng ◽  
Yuying Zhang ◽  
Ancheng Tang ◽  
Xiao Cai ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Surface Sites ◽  
Catalytic Performances

The catalytic properties of atomically precise gold-based nanoclusters can be tailored by precisely modulating the surface sites on the nanoclusters.

scholarly journals Gas Sensing Properties of Carbon Nanotubes Decorated with Iridium Oxide Nanoparticles

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 874 ◽  
Author(s):  
Juan Casanova-Cháfer ◽  
Èric Navarrete ◽  
Eduard Llobet
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensors ◽  
Gas Sensing ◽  
Iridium Oxide ◽  
Experimental Conditions ◽  
Multi Wall Carbon Nanotubes ◽  
Si Substrates ◽  
Condensation Growth ◽  
Gas Sensing Properties ◽  
Oxide Nanoparticle

The properties of Iridium oxide (IrO2) decorated Multi-Wall Carbon Nanotubes (IrO2-MWCNTs) are studied for detecting nitrogen dioxide and ammonia vapors. IrO2 nanoparticles were synthetized using a hydrolysis and acid condensation growth mechanism, and subsequently employed for decorating the sidewalls of carbon nanotubes. Decorated MWCNTs films were deposited onto SiO2/Si substrates for achieving chemoresistive gas sensors. NO2 and NH3 gases were detected under different experimental conditions. Higher and more stable responses towards NH3 and NO2 were observed for iridium-oxide nanoparticle decorated MWCNT material, compared to bare MWCNT material. Raman Spectroscopy was employed to study the nanomaterials and the optimal operating temperatures were determined.

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