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Title: Hierarchical electrode architectures for electrical energy storage & conversion.

Abstract

The integration and stability of electrocatalytic nanostructures, which represent one level of porosity in a hierarchical structural scheme when combined with a three-dimensional support scaffold, has been studied using a combination of synthetic processes, characterization techniques, and computational methods. Dendritic platinum nanostructures have been covalently linked to common electrode surfaces using a newly developed chemical route; a chemical route equally applicable to a range of metals, oxides, and semiconductive materials. Characterization of the resulting bound nanostructure system confirms successful binding, while electrochemistry and microscopy demonstrate the viability of these electroactive particles. Scanning tunneling microscopy has been used to image and validate the short-term stability of several electrode-bound platinum dendritic sheet structures toward Oswald ripening. Kinetic Monte Carlo methods have been applied to develop an understanding of the stability of the basic nano-scale porous platinum sheets as they transform from an initial dendrite to hole containing sheets. Alternate synthetic strategies were pursued to grow dendritic platinum structures directly onto subunits (graphitic particles) of the electrode scaffold. A two-step photocatalytic seeding process proved successful at generating desirable nano-scale porous structures. Growth in-place is an alternate strategy to the covalent linking of the electrocatalytic nanostructures.

Authors:
; ; ;
Publication Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1038175
Report Number(s):
SAND2012-0481
TRN: US201208%%564
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; DENDRITES; ELECTROCHEMISTRY; ELECTRODES; ENERGY STORAGE; KINETICS; MICROSCOPY; MONTE CARLO METHOD; NANOSTRUCTURES; OXIDES; PLATINUM; POROSITY; RIPENING; SCANNING TUNNELING MICROSCOPY; STABILITY; VIABILITY

Citation Formats

Zavadil, Kevin Robert, Missert, Nancy A, Shelnutt, John Allen, and van Swol, Frank B. Hierarchical electrode architectures for electrical energy storage & conversion.. United States: N. p., 2012. Web. doi:10.2172/1038175.
Zavadil, Kevin Robert, Missert, Nancy A, Shelnutt, John Allen, & van Swol, Frank B. Hierarchical electrode architectures for electrical energy storage & conversion.. United States. https://doi.org/10.2172/1038175
Zavadil, Kevin Robert, Missert, Nancy A, Shelnutt, John Allen, and van Swol, Frank B. 2012. "Hierarchical electrode architectures for electrical energy storage & conversion.". United States. https://doi.org/10.2172/1038175. https://www.osti.gov/servlets/purl/1038175.
@article{osti_1038175,
title = {Hierarchical electrode architectures for electrical energy storage & conversion.},
author = {Zavadil, Kevin Robert and Missert, Nancy A and Shelnutt, John Allen and van Swol, Frank B},
abstractNote = {The integration and stability of electrocatalytic nanostructures, which represent one level of porosity in a hierarchical structural scheme when combined with a three-dimensional support scaffold, has been studied using a combination of synthetic processes, characterization techniques, and computational methods. Dendritic platinum nanostructures have been covalently linked to common electrode surfaces using a newly developed chemical route; a chemical route equally applicable to a range of metals, oxides, and semiconductive materials. Characterization of the resulting bound nanostructure system confirms successful binding, while electrochemistry and microscopy demonstrate the viability of these electroactive particles. Scanning tunneling microscopy has been used to image and validate the short-term stability of several electrode-bound platinum dendritic sheet structures toward Oswald ripening. Kinetic Monte Carlo methods have been applied to develop an understanding of the stability of the basic nano-scale porous platinum sheets as they transform from an initial dendrite to hole containing sheets. Alternate synthetic strategies were pursued to grow dendritic platinum structures directly onto subunits (graphitic particles) of the electrode scaffold. A two-step photocatalytic seeding process proved successful at generating desirable nano-scale porous structures. Growth in-place is an alternate strategy to the covalent linking of the electrocatalytic nanostructures.},
doi = {10.2172/1038175},
url = {https://www.osti.gov/biblio/1038175}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2012},
month = {Sun Jan 01 00:00:00 EST 2012}
}