Doctoral Dissertations

Zhen He

Abstract

"The focus of this dissertation is the electrodeposition and electrochemical reduction of epitaxial metal oxide thin films and superlattices. The electrochemical reduction of metal oxides to metals has been studied for decades as an alternative to pyrometallurgical processes for the metallurgy industry. However, the previous work was conducted on bulk polycrystalline metal oxides. Paper I in this dissertation shows that epitaxial face-centered cubic magnetite (Fe₃O₄) thin films can be electrochemically reduced to epitaxial body-centered cubic iron (Fe) thin films in aqueous solution on single-crystalline Au substrates at room temperature. This technique opens new possibilities to produce special epitaxial metal/metal oxide heterojunctions and a wide range of epitaxial metallic alloy films from the corresponding mixed metal oxides. Electrodeposition, like biomineralization, is a soft solution processing method which can produce functional materials with special properties onto conducting or semiconducting solid surfaces. Paper II in this dissertation presents the electrodeposition of cobalt-substituted magnetite (CoₓFe₃₋ₓO₄, 0

Advisor(s)

Switzer, Jay A., 1950-

Committee Member(s)

Winiarz, Jeffrey G.
Huebner, Wayne
Nath, Manashi
Stavropoulos, Pericles

Department(s)

Chemistry

Degree Name

Ph. D. in Chemistry

Sponsor(s)

National Science Foundation (U.S.)
United States. Department of Energy

Publisher

Missouri University of Science and Technology

Publication Date

Summer 2012

Journal article titles appearing in thesis/dissertation

  • Room-temperature electrochemical reduction of epitaxial magnetite films to epitaxial iron films
  • Electrodeposition of CoxFe3-xO₄ epitaxial films and superlattices
  • Electrodeposition of crystalline Co₃O₄ - a potent oxygen evolution catalyst

Pagination

xii, 169 pages

Note about bibliography

Includes bibliographical references.

Rights

© 2012 Zhen He, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Electroplating
Epitaxy
Metallic oxides
Superlattices as materials

Thesis Number

T 10028

Print OCLC #

815768012

Electronic OCLC #

801550410

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