Preparation and characterization of mesoporous carbon-supported Pt nanocatalyst and its stability under strong acidic solutions

Yongju Jung; Seok Kim; Soo Jin Park; Ji Man Kim

doi:10.1016/j.colsurfa.2007.04.088

Preparation and characterization of mesoporous carbon-supported Pt nanocatalyst and its stability under strong acidic solutions

Yongju Jung, Seok Kim, Soo Jin Park, Ji Man Kim

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8 Scopus citations

Abstract

Pt/C catalyst was prepared by the formic acid reduction method (FARM) using mesoporous carbon supports with submicron-scale particle size, which was synthesized by the nano-replication technique using mesoporous silica (MSU-H) as templates. The average size of the Pt particles, calculated from the Pt(1 1 1) peak by Scherrer equation, was found to be 3.3 nm. The chemical stabilities of Pt/C catalysts and polymer-coated Pt/C catalysts were examined in distilled water and in strong acidic solutions such as H₂SO₄ and HClO₄. The release amount of Pt in distilled water was found to be at trace levels (<3 ppb), which is close to the detection limits of ICP-AES. However, the Pt release greatly increased with time in both H₂SO₄ and HClO₄ solutions and reached a few percent levels in a week. On the other hand, a PVP/PEI-coated Pt/C catalyst showed much better stability that the Pt release was about 0.5% in 3 M HClO₄ for a week, compared with that of a pristine Pt/C catalyst.

Original language	English
Pages (from-to)	167-170
Number of pages	4
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	313-314
DOIs	https://doi.org/10.1016/j.colsurfa.2007.04.088
State	Published - 1 Feb 2008

Bibliographical note

Funding Information:
This work was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD, KRF-2005-005-J11901).

Keywords

Chemical stability
Mesoporous carbons
Platinum catalyst
Polymer coating

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10.1016/j.colsurfa.2007.04.088

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title = "Preparation and characterization of mesoporous carbon-supported Pt nanocatalyst and its stability under strong acidic solutions",

abstract = "Pt/C catalyst was prepared by the formic acid reduction method (FARM) using mesoporous carbon supports with submicron-scale particle size, which was synthesized by the nano-replication technique using mesoporous silica (MSU-H) as templates. The average size of the Pt particles, calculated from the Pt(1 1 1) peak by Scherrer equation, was found to be 3.3 nm. The chemical stabilities of Pt/C catalysts and polymer-coated Pt/C catalysts were examined in distilled water and in strong acidic solutions such as H2SO4 and HClO4. The release amount of Pt in distilled water was found to be at trace levels (<3 ppb), which is close to the detection limits of ICP-AES. However, the Pt release greatly increased with time in both H2SO4 and HClO4 solutions and reached a few percent levels in a week. On the other hand, a PVP/PEI-coated Pt/C catalyst showed much better stability that the Pt release was about 0.5% in 3 M HClO4 for a week, compared with that of a pristine Pt/C catalyst.",

keywords = "Chemical stability, Mesoporous carbons, Platinum catalyst, Polymer coating",

author = "Yongju Jung and Seok Kim and Park, {Soo Jin} and Kim, {Ji Man}",

note = "Funding Information: This work was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD, KRF-2005-005-J11901).",

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doi = "10.1016/j.colsurfa.2007.04.088",

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AU - Jung, Yongju

AU - Kim, Seok

AU - Park, Soo Jin

AU - Kim, Ji Man

N1 - Funding Information: This work was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD, KRF-2005-005-J11901).

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N2 - Pt/C catalyst was prepared by the formic acid reduction method (FARM) using mesoporous carbon supports with submicron-scale particle size, which was synthesized by the nano-replication technique using mesoporous silica (MSU-H) as templates. The average size of the Pt particles, calculated from the Pt(1 1 1) peak by Scherrer equation, was found to be 3.3 nm. The chemical stabilities of Pt/C catalysts and polymer-coated Pt/C catalysts were examined in distilled water and in strong acidic solutions such as H2SO4 and HClO4. The release amount of Pt in distilled water was found to be at trace levels (<3 ppb), which is close to the detection limits of ICP-AES. However, the Pt release greatly increased with time in both H2SO4 and HClO4 solutions and reached a few percent levels in a week. On the other hand, a PVP/PEI-coated Pt/C catalyst showed much better stability that the Pt release was about 0.5% in 3 M HClO4 for a week, compared with that of a pristine Pt/C catalyst.

AB - Pt/C catalyst was prepared by the formic acid reduction method (FARM) using mesoporous carbon supports with submicron-scale particle size, which was synthesized by the nano-replication technique using mesoporous silica (MSU-H) as templates. The average size of the Pt particles, calculated from the Pt(1 1 1) peak by Scherrer equation, was found to be 3.3 nm. The chemical stabilities of Pt/C catalysts and polymer-coated Pt/C catalysts were examined in distilled water and in strong acidic solutions such as H2SO4 and HClO4. The release amount of Pt in distilled water was found to be at trace levels (<3 ppb), which is close to the detection limits of ICP-AES. However, the Pt release greatly increased with time in both H2SO4 and HClO4 solutions and reached a few percent levels in a week. On the other hand, a PVP/PEI-coated Pt/C catalyst showed much better stability that the Pt release was about 0.5% in 3 M HClO4 for a week, compared with that of a pristine Pt/C catalyst.

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KW - Polymer coating

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Preparation and characterization of mesoporous carbon-supported Pt nanocatalyst and its stability under strong acidic solutions

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