Imperial College London
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ProfessorBaptisteGault

Faculty of Engineering, Department of Materials

Professor of Atomic-Scale Characterization
 
 
 
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b.gault

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{El-Zoka:2020:10.1149/ma2020-01482713mtgabs,
author = {El-Zoka, AA and Schweinar, K and da, Silva AK and Raabe, D and Gault, B},
doi = {10.1149/ma2020-01482713mtgabs},
journal = {ECS Meeting Abstracts},
pages = {2713--2713},
title = {Prospects of Making Nanoporous Ruthenium from Transition Metal-Ru Alloys},
url = {http://dx.doi.org/10.1149/ma2020-01482713mtgabs},
volume = {MA2020-01},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - <jats:p>  Dealloying of Ag-Au alloys is known to produce Au-rich, bicontinous, nanoporous layers [1-2]. The high functionality of nanoporous gold, demonstrated in a variety of applications [3-4], invites us to study the fabrication of other nanoporous metals of interest by exploiting corrosion processes. Recent studies have shown how the use of ruthenium, which is the cheapest Pt-group metal, for catalysis could be expanded from the classical example of CO oxidation [5], to other important reactions such as hydrogen evolution [6]. Although several porous/non-porous Ru-containing systems have been studied before [7-8], there remains a knowledge-gap with regards to the design and optimization of Ru-based catalysts.</jats:p>               <jats:p>As a first step towards the development of nanoporous ruthenium by metal corrosion, this work shall focus on the design of binary transition metal-Ru systems. High resolution APT (atom probe tomography) studies of Ru-lean alloys (Fe-Ru and Ni-Ru) will assess the bulk microstructure of as-cast alloys and how it is affected by processing conditions [9]. Furthermore, pathways to inducing Ru-surface enrichment in different thermochemical environments (oxidative/inert/reductive) will be investigated by combined APT and XPS (X-ray photoelectron spectroscopy) [10]. The results of this study will provide guidance to making low-cost, high surface area nanoporous ruthenium catalysts by dealloying in acidic media.</jats:p>               <jats:p>                  <jats:bold>References</jats:bold>               </jats:p>               <jats:p>[1] H. W. Pickering and P. R. Swann. Electron metallography of chemical attack upon some alloys susceptible to stress corrosion cracking, Corrosion, 1963, 19, 373t.</jats:p>               <jats:p>[2] R.C. Newman. Dealloying, Shreir's Corrosion (fourth ed.), 2, Elsevier (2010), 801-809.</jats:p>               <jats:p>[3] A.A
AU  - El-Zoka,AA
AU  - Schweinar,K
AU  - da,Silva AK
AU  - Raabe,D
AU  - Gault,B
DO  - 10.1149/ma2020-01482713mtgabs
EP  - 2713
PY  - 2020///
SP  - 2713
TI  - Prospects of Making Nanoporous Ruthenium from Transition Metal-Ru Alloys
T2  - ECS Meeting Abstracts
UR  - http://dx.doi.org/10.1149/ma2020-01482713mtgabs
VL  - MA2020-01
ER  -
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