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Title: Single crystalline thin films as a novel class of electrocatalysts

Abstract

The ubiquitous use of single crystal metal electrodes has garnered invaluable insight into the relationship between surface atomic structure and functional electrochemical properties. But, the sensitivity of their electrochemical response to surface orientation and the amount of precious metal required can limit their use. We present here a generally applicable procedure for producing thin metal films with a large proportion of atomically flat (111) terraces without the use of an epitaxial template. Thermal annealing in a controlled atmosphere induces long-range ordering of magnetron sputtered thin metal films deposited on an amorphous substrate. The ordering transition in these thin metal films yields characteristic (111) electrochemical signatures with minimal amount of material and provides an adequate replacement for oriented bulk single crystals. Our procedure can be generalized towards a novel class of practical multimetallic thin film based electrocatalysts with tunable near-surface compositional profile and morphology. Annealing of atomically corrugated sputtered thin film Pt-alloy catalysts yields an atomically smooth structure with highly crystalline, (111)-like ordered and Pt segregated surface that displays superior functional properties, bridging the gap between extended/bulk surfaces and nanoscale systems.

Authors:
 [1];  [1];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1395043
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Serbian Chemical Society
Additional Journal Information:
Journal Volume: 78; Journal Issue: 11; Journal ID: ISSN 0352-5139
Publisher:
Serbian Chemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; thin films; magnetron sputtering; Pt-alloys; oxygen reduction reaction

Citation Formats

Snyder, Joshua, Markovic, Nenad, and Stamenkovic, Vojislav. Single crystalline thin films as a novel class of electrocatalysts. United States: N. p., 2013. Web. doi:10.2298/JSC130916119S.
Snyder, Joshua, Markovic, Nenad, & Stamenkovic, Vojislav. Single crystalline thin films as a novel class of electrocatalysts. United States. doi:10.2298/JSC130916119S.
Snyder, Joshua, Markovic, Nenad, and Stamenkovic, Vojislav. Tue . "Single crystalline thin films as a novel class of electrocatalysts". United States. doi:10.2298/JSC130916119S. https://www.osti.gov/servlets/purl/1395043.
@article{osti_1395043,
title = {Single crystalline thin films as a novel class of electrocatalysts},
author = {Snyder, Joshua and Markovic, Nenad and Stamenkovic, Vojislav},
abstractNote = {The ubiquitous use of single crystal metal electrodes has garnered invaluable insight into the relationship between surface atomic structure and functional electrochemical properties. But, the sensitivity of their electrochemical response to surface orientation and the amount of precious metal required can limit their use. We present here a generally applicable procedure for producing thin metal films with a large proportion of atomically flat (111) terraces without the use of an epitaxial template. Thermal annealing in a controlled atmosphere induces long-range ordering of magnetron sputtered thin metal films deposited on an amorphous substrate. The ordering transition in these thin metal films yields characteristic (111) electrochemical signatures with minimal amount of material and provides an adequate replacement for oriented bulk single crystals. Our procedure can be generalized towards a novel class of practical multimetallic thin film based electrocatalysts with tunable near-surface compositional profile and morphology. Annealing of atomically corrugated sputtered thin film Pt-alloy catalysts yields an atomically smooth structure with highly crystalline, (111)-like ordered and Pt segregated surface that displays superior functional properties, bridging the gap between extended/bulk surfaces and nanoscale systems.},
doi = {10.2298/JSC130916119S},
journal = {Journal of the Serbian Chemical Society},
number = 11,
volume = 78,
place = {United States},
year = {2013},
month = {1}
}

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Cited by: 1 work
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