Preparation of a carbon-supported pt-ni bimetallic catalyst with a Pt-rich shell using a dopamine as protective coating

Youngick Cho; Woong Hee Lee; Hansung Kim

doi:10.1149/2.0511702jes

Preparation of a carbon-supported pt-ni bimetallic catalyst with a Pt-rich shell using a dopamine as protective coating

Youngick Cho, Woong Hee Lee, Hansung Kim

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

A carbon-supported Pt₂Ni₁ 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 Pt₂Ni₁/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	https://doi.org/10.1149/2.0511702jes
Publication status	Published - 2017

Bibliographical note

Funding Information:
This material is based upon work supported by the Ministry of Trade, Industry and Energy (MOTIE, Korea) under the Industrial Technology Innovation Program. No.10062511, “Design and modelling of Gas Diffusion layer and Bipolar plate integrated Porous electrode structure for high power in hydrogen fuel cell vehicle”, and the Priority Research Centers Program through the National Research Foundation of Korea (2009-0093823), and the Yonsei University Research Fund(Post Doc. Researcher Supporting Program) of 2016 (Project No.: 2016-12-0005).

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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title = "Preparation of a carbon-supported pt-ni bimetallic catalyst with a Pt-rich shell using a dopamine as protective coating",

abstract = "A carbon-supported Pt2Ni1 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 Pt2Ni1/C catalyst prepared with an optimized amount of PDA layer exhibited improved mass activity of 0.43 A mgPt−1 at 0.9 V, which is almost two times higher than that of Pt/C.",

author = "Youngick Cho and Lee, {Woong Hee} and Hansung Kim",

note = "Funding Information: This material is based upon work supported by the Ministry of Trade, Industry and Energy (MOTIE, Korea) under the Industrial Technology Innovation Program. No.10062511, “Design and modelling of Gas Diffusion layer and Bipolar plate integrated Porous electrode structure for high power in hydrogen fuel cell vehicle”, and the Priority Research Centers Program through the National Research Foundation of Korea (2009-0093823), and the Yonsei University Research Fund(Post Doc. Researcher Supporting Program) of 2016 (Project No.: 2016-12-0005).",

year = "2017",

doi = "10.1149/2.0511702jes",

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PY - 2017

Y1 - 2017

N2 - A carbon-supported Pt2Ni1 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 Pt2Ni1/C catalyst prepared with an optimized amount of PDA layer exhibited improved mass activity of 0.43 A mgPt−1 at 0.9 V, which is almost two times higher than that of Pt/C.

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