Cr effect on the durability of Pt-TM catalysts for PEMFCs

Jungdo Kim; Eung Seok Lee; Yoon Soo Chun; Dae-Soon Lim

doi:10.1039/c5ra00795j

Cr effect on the durability of Pt-TM catalysts for PEMFCs

Jungdo Kim, Eung Seok Lee, Yoon Soo Chun, Dae-Soon Lim

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

2 Citations (Scopus)

Abstract

Pt-TM-Cr/C alloy catalysts were prepared using a polyol method to improve their durability through the addition of a small amount of Cr, which is expected to prevent dissolution of transition metals (TMs). H<inf>2</inf>PtCl<inf>6</inf>·H<inf>2</inf>O, CoCl<inf>2</inf>·6H<inf>2</inf>O, Ni(NO<inf>3</inf>)<inf>2</inf>·6H<inf>2</inf>O, and CrCl<inf>2</inf> were used as precursors. X-ray diffraction was used to determine the compositions and sizes of the prepared electrocatalysts. The average sizes of the electrocatalyst particles were estimated to be 2-4 nm using the Scherrer formula. Transmission electron microscopy observations revealed that the nanoparticles were uniformly distributed on the carbon, i.e., Vulcan XC 72. The durability of the Pt-TM-Cr/C alloy catalysts was evaluated using a cell test and the durability test. According to the cell tests, Pt-TM(Co)-Cr (67 : 23 : 10)/C alloy catalysts are more durable than Pt-TM(Co)/C alloy catalysts. The stability tests showed that Cr prevents the dissolution of transition metals, which are integral to the durability of the electrode.

Original language	English
Pages (from-to)	55401-55405
Number of pages	5
Journal	RSC Advances
Volume	5
Issue number	68
DOIs	https://doi.org/10.1039/c5ra00795j
Publication status	Published - 2015

ASJC Scopus subject areas

General Chemical Engineering
General Chemistry

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title = "Cr effect on the durability of Pt-TM catalysts for PEMFCs",

abstract = "Pt-TM-Cr/C alloy catalysts were prepared using a polyol method to improve their durability through the addition of a small amount of Cr, which is expected to prevent dissolution of transition metals (TMs). H2PtCl6·H2O, CoCl2·6H2O, Ni(NO3)2·6H2O, and CrCl2 were used as precursors. X-ray diffraction was used to determine the compositions and sizes of the prepared electrocatalysts. The average sizes of the electrocatalyst particles were estimated to be 2-4 nm using the Scherrer formula. Transmission electron microscopy observations revealed that the nanoparticles were uniformly distributed on the carbon, i.e., Vulcan XC 72. The durability of the Pt-TM-Cr/C alloy catalysts was evaluated using a cell test and the durability test. According to the cell tests, Pt-TM(Co)-Cr (67 : 23 : 10)/C alloy catalysts are more durable than Pt-TM(Co)/C alloy catalysts. The stability tests showed that Cr prevents the dissolution of transition metals, which are integral to the durability of the electrode.",

author = "Jungdo Kim and Lee, {Eung Seok} and Chun, {Yoon Soo} and Dae-Soon Lim",

year = "2015",

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T1 - Cr effect on the durability of Pt-TM catalysts for PEMFCs

AU - Kim, Jungdo

AU - Lee, Eung Seok

AU - Chun, Yoon Soo

AU - Lim, Dae-Soon

PY - 2015

Y1 - 2015

N2 - Pt-TM-Cr/C alloy catalysts were prepared using a polyol method to improve their durability through the addition of a small amount of Cr, which is expected to prevent dissolution of transition metals (TMs). H2PtCl6·H2O, CoCl2·6H2O, Ni(NO3)2·6H2O, and CrCl2 were used as precursors. X-ray diffraction was used to determine the compositions and sizes of the prepared electrocatalysts. The average sizes of the electrocatalyst particles were estimated to be 2-4 nm using the Scherrer formula. Transmission electron microscopy observations revealed that the nanoparticles were uniformly distributed on the carbon, i.e., Vulcan XC 72. The durability of the Pt-TM-Cr/C alloy catalysts was evaluated using a cell test and the durability test. According to the cell tests, Pt-TM(Co)-Cr (67 : 23 : 10)/C alloy catalysts are more durable than Pt-TM(Co)/C alloy catalysts. The stability tests showed that Cr prevents the dissolution of transition metals, which are integral to the durability of the electrode.

AB - Pt-TM-Cr/C alloy catalysts were prepared using a polyol method to improve their durability through the addition of a small amount of Cr, which is expected to prevent dissolution of transition metals (TMs). H2PtCl6·H2O, CoCl2·6H2O, Ni(NO3)2·6H2O, and CrCl2 were used as precursors. X-ray diffraction was used to determine the compositions and sizes of the prepared electrocatalysts. The average sizes of the electrocatalyst particles were estimated to be 2-4 nm using the Scherrer formula. Transmission electron microscopy observations revealed that the nanoparticles were uniformly distributed on the carbon, i.e., Vulcan XC 72. The durability of the Pt-TM-Cr/C alloy catalysts was evaluated using a cell test and the durability test. According to the cell tests, Pt-TM(Co)-Cr (67 : 23 : 10)/C alloy catalysts are more durable than Pt-TM(Co)/C alloy catalysts. The stability tests showed that Cr prevents the dissolution of transition metals, which are integral to the durability of the electrode.

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JO - RSC Advances

JF - RSC Advances

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Cr effect on the durability of Pt-TM catalysts for PEMFCs

Abstract

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