Details
| Original language | English |
|---|---|
| Pages (from-to) | 430-437 |
| Number of pages | 8 |
| Journal | Electrochimica acta |
| Volume | 252 |
| Early online date | 1 Sept 2017 |
| Publication status | Published - 20 Oct 2017 |
Abstract
A porous Ag network has been deposited on laser structured Ni supports by using the dynamic hydrogen template deposition (DHTD) technique. For a better hydrogen evolution, a 10 nm Pt layer has been sputtered on the Ni supports before Ag deposition. In a subsequent step, the Ag network has been modified by electrochemical Pt deposition in a replacement reaction forming a porous Pt@Ag network. Different Pt species are formed at different positions of the Ag network: Pure Pt on top and Ag1Pt1 alloy at the interface between the Ag network and the deposited Pt film. Laser structuring the substrate in advance can facilitate mass transport, especially for the galvanic Pt replacement reaction, and improves the performance of the electrode. As a result, the performance of the Pt@Ag network on laser structured electrodes is significantly higher compared to a non-structured electrode.
Keywords
- Dynamic hydrogen template deposition, Galvanic replacement, Gradient pore structure, Laser structuring, Supercapacitor
ASJC Scopus subject areas
- Chemical Engineering(all)
- General Chemical Engineering
- Chemistry(all)
- Electrochemistry
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In: Electrochimica acta, Vol. 252, 20.10.2017, p. 430-437.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Laser directed dynamic hydrogen template deposition of porous Pt@Ag networks
AU - Wolf, Mario
AU - Caro, Jürgen
AU - Feldhoff, Armin
AU - Steinbach, Frank
AU - Schulz-Ruhtenberg, Malte
AU - Lange, Karsten
N1 - Funding Information: This work was done within the framework of the NTH Research Group ElektroBak organized by Uwe Schröder (TU Braunschweig) and financed by the German state of Lower Saxony. Furthermore, we thank LPKF AG for the laser structuring, the technical expertise and general support. Publisher Copyright: © 2017 Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/10/20
Y1 - 2017/10/20
N2 - A porous Ag network has been deposited on laser structured Ni supports by using the dynamic hydrogen template deposition (DHTD) technique. For a better hydrogen evolution, a 10 nm Pt layer has been sputtered on the Ni supports before Ag deposition. In a subsequent step, the Ag network has been modified by electrochemical Pt deposition in a replacement reaction forming a porous Pt@Ag network. Different Pt species are formed at different positions of the Ag network: Pure Pt on top and Ag1Pt1 alloy at the interface between the Ag network and the deposited Pt film. Laser structuring the substrate in advance can facilitate mass transport, especially for the galvanic Pt replacement reaction, and improves the performance of the electrode. As a result, the performance of the Pt@Ag network on laser structured electrodes is significantly higher compared to a non-structured electrode.
AB - A porous Ag network has been deposited on laser structured Ni supports by using the dynamic hydrogen template deposition (DHTD) technique. For a better hydrogen evolution, a 10 nm Pt layer has been sputtered on the Ni supports before Ag deposition. In a subsequent step, the Ag network has been modified by electrochemical Pt deposition in a replacement reaction forming a porous Pt@Ag network. Different Pt species are formed at different positions of the Ag network: Pure Pt on top and Ag1Pt1 alloy at the interface between the Ag network and the deposited Pt film. Laser structuring the substrate in advance can facilitate mass transport, especially for the galvanic Pt replacement reaction, and improves the performance of the electrode. As a result, the performance of the Pt@Ag network on laser structured electrodes is significantly higher compared to a non-structured electrode.
KW - Dynamic hydrogen template deposition
KW - Galvanic replacement
KW - Gradient pore structure
KW - Laser structuring
KW - Supercapacitor
UR - http://www.scopus.com/inward/record.url?scp=85028942134&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2017.08.174
DO - 10.1016/j.electacta.2017.08.174
M3 - Article
AN - SCOPUS:85028942134
VL - 252
SP - 430
EP - 437
JO - Electrochimica acta
JF - Electrochimica acta
SN - 0013-4686
ER -