Abstract
A carbon-supported Pt 2 Ni 1 catalyst with a Pt rich shell was prepared using a high temperature treatment. In this process, polydopamine (PDA) encapsulates whole Pt/C and acts as a protective coating layer to suppress sintering effects of particles during the high temperature treatment. Dopamine, a mussel-inspired substrate, is an effective surface coating material because the polymerization of dopamine takes place easily at room temperature and exhibits a strong adhesive function with almost any surface. With increasing thickness of the PDA coating layer, the particle size became smaller following heat-treatment. However, when excess PDA was used, residue remained on the surface of catalyst. As a result, the active surface area of catalyst was reduced, thereby resulting in lowered catalytic performance. The Pt 2 Ni 1 /C catalyst prepared with an optimized amount of PDA layer exhibited improved mass activity of 0.43 A mg Pt −1 at 0.9 V, which is almost two times higher than that of Pt/C.
| Original language | English |
|---|---|
| Pages (from-to) | F65-F70 |
| Journal | Journal of the Electrochemical Society |
| Volume | 164 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2017 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Electrochemistry
- Materials Chemistry
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Preparation of a carbon-supported pt-ni bimetallic catalyst with a Pt-rich shell using a dopamine as protective coating. / Cho, Youngick; Lee, Woong Hee; Kim, Hansung.
In: Journal of the Electrochemical Society, Vol. 164, No. 2, 01.01.2017, p. F65-F70.Research output: Contribution to journal › Article
TY - JOUR
T1 - Preparation of a carbon-supported pt-ni bimetallic catalyst with a Pt-rich shell using a dopamine as protective coating
AU - Cho, Youngick
AU - Lee, Woong Hee
AU - Kim, Hansung
PY - 2017/1/1
Y1 - 2017/1/1
N2 - A carbon-supported Pt 2 Ni 1 catalyst with a Pt rich shell was prepared using a high temperature treatment. In this process, polydopamine (PDA) encapsulates whole Pt/C and acts as a protective coating layer to suppress sintering effects of particles during the high temperature treatment. Dopamine, a mussel-inspired substrate, is an effective surface coating material because the polymerization of dopamine takes place easily at room temperature and exhibits a strong adhesive function with almost any surface. With increasing thickness of the PDA coating layer, the particle size became smaller following heat-treatment. However, when excess PDA was used, residue remained on the surface of catalyst. As a result, the active surface area of catalyst was reduced, thereby resulting in lowered catalytic performance. The Pt 2 Ni 1 /C catalyst prepared with an optimized amount of PDA layer exhibited improved mass activity of 0.43 A mg Pt −1 at 0.9 V, which is almost two times higher than that of Pt/C.
AB - A carbon-supported Pt 2 Ni 1 catalyst with a Pt rich shell was prepared using a high temperature treatment. In this process, polydopamine (PDA) encapsulates whole Pt/C and acts as a protective coating layer to suppress sintering effects of particles during the high temperature treatment. Dopamine, a mussel-inspired substrate, is an effective surface coating material because the polymerization of dopamine takes place easily at room temperature and exhibits a strong adhesive function with almost any surface. With increasing thickness of the PDA coating layer, the particle size became smaller following heat-treatment. However, when excess PDA was used, residue remained on the surface of catalyst. As a result, the active surface area of catalyst was reduced, thereby resulting in lowered catalytic performance. The Pt 2 Ni 1 /C catalyst prepared with an optimized amount of PDA layer exhibited improved mass activity of 0.43 A mg Pt −1 at 0.9 V, which is almost two times higher than that of Pt/C.
UR - http://www.scopus.com/inward/record.url?scp=85038005579&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85038005579&partnerID=8YFLogxK
U2 - 10.1149/2.0511702jes
DO - 10.1149/2.0511702jes
M3 - Article
AN - SCOPUS:85038005579
VL - 164
SP - F65-F70
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
SN - 0013-4651
IS - 2
ER -