Supported core at shell electrocatalysts for fuel cells: Close encounter with reality

Seung Jun Hwang; Sung Jong Yoo; Jungho Shin; Yong Hun Cho; Jong Hyun Jang; Eunae Cho; Yung Eun Sung; Suk Woo Nam; Tae Hoon Lim; Seung Cheol Lee; Soo Kil Kim

doi:10.1038/srep01309

Supported core at shell electrocatalysts for fuel cells: Close encounter with reality

Seung Jun Hwang
, Sung Jong Yoo
, Jungho Shin
, Yong Hun Cho
, Jong Hyun Jang
, Eunae Cho
, Yung Eun Sung
, Suk Woo Nam
, Tae Hoon Lim
, Seung Cheol Lee^*
, Soo Kil Kim

^*Corresponding author for this work

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

67 Citations (Scopus)

Abstract

Core at shell electrocatalysts for fuel cells have the advantages of a high utilization of Pt and the modification of its electronic structures toward enhancement of the activities. In this study, we suggest both a theoretical background for the design of highly active and stable core@shell/C and a novel facile synthetic strategy for their preparation. Using density functional theory calculations guided by the oxygen adsorption energy and vacancy formation energy, Pd₃Cu₁@Pt/C was selected as the most suitable candidate for the oxygen reduction reaction in terms of its activity and stability. These predictions were experimentally verified by the surfactant-free synthesis of Pd3Cu1/C cores and the selective Pt shell formation using a Hantzsch ester as a reducing agent. In a similar fashion, Pd@Pd ₄Ir₆/C catalyst was also designed and synthesized for the hydrogen oxidation reaction. The developed catalysts exhibited high activity, high selectivity, and 4,000 h of long-term durability at the single-cell level.

Original language	English
Article number	1309
Journal	Scientific reports
Volume	3
DOIs	https://doi.org/10.1038/srep01309
Publication status	Published - 2013

Bibliographical note

Funding Information:
This research was supported by the Korean Ministry of Knowledge Economy through the Korea Institute of Energy Technology Evaluation and Planning under contract number 2008-N-FC08-P-01 (S. J. H, S. J. Y, S.–K. K, S. W. N, and T.–H. L,), by the KIST Institutional Program under contract number 2E22873-12-020 (S.–K. K. and E. C.) and by the Joint Research Project funded by the Korea Research Council of Fundamental Science and Technology (KRCF), as a part of the ‘‘development and mechanism study of high performance and durable components for high-temperature PEMFCs.’’ (J. H. J). It was also partially supported by Korean Ministry of Education, Science and Technology through the National Research Foundation of Korea under contract number 2009-0082471. (J. S. and S.-C. L.).

ASJC Scopus subject areas

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title = "Supported core at shell electrocatalysts for fuel cells: Close encounter with reality",

abstract = "Core at shell electrocatalysts for fuel cells have the advantages of a high utilization of Pt and the modification of its electronic structures toward enhancement of the activities. In this study, we suggest both a theoretical background for the design of highly active and stable core@shell/C and a novel facile synthetic strategy for their preparation. Using density functional theory calculations guided by the oxygen adsorption energy and vacancy formation energy, Pd3Cu1@Pt/C was selected as the most suitable candidate for the oxygen reduction reaction in terms of its activity and stability. These predictions were experimentally verified by the surfactant-free synthesis of Pd3Cu1/C cores and the selective Pt shell formation using a Hantzsch ester as a reducing agent. In a similar fashion, Pd@Pd 4Ir6/C catalyst was also designed and synthesized for the hydrogen oxidation reaction. The developed catalysts exhibited high activity, high selectivity, and 4,000 h of long-term durability at the single-cell level.",

author = "Hwang, \{Seung Jun\} and Yoo, \{Sung Jong\} and Jungho Shin and Cho, \{Yong Hun\} and Jang, \{Jong Hyun\} and Eunae Cho and Sung, \{Yung Eun\} and Nam, \{Suk Woo\} and Lim, \{Tae Hoon\} and Lee, \{Seung Cheol\} and Kim, \{Soo Kil\}",

note = "Funding Information: This research was supported by the Korean Ministry of Knowledge Economy through the Korea Institute of Energy Technology Evaluation and Planning under contract number 2008-N-FC08-P-01 (S. J. H, S. J. Y, S.–K. K, S. W. N, and T.–H. L,), by the KIST Institutional Program under contract number 2E22873-12-020 (S.–K. K. and E. C.) and by the Joint Research Project funded by the Korea Research Council of Fundamental Science and Technology (KRCF), as a part of the {\textquoteleft}{\textquoteleft}development and mechanism study of high performance and durable components for high-temperature PEMFCs.{\textquoteright}{\textquoteright} (J. H. J). It was also partially supported by Korean Ministry of Education, Science and Technology through the National Research Foundation of Korea under contract number 2009-0082471. (J. S. and S.-C. L.).",

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journal = "Scientific reports",

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AU - Hwang, Seung Jun

AU - Yoo, Sung Jong

AU - Shin, Jungho

AU - Cho, Yong Hun

AU - Jang, Jong Hyun

AU - Cho, Eunae

AU - Sung, Yung Eun

AU - Nam, Suk Woo

AU - Lim, Tae Hoon

AU - Lee, Seung Cheol

AU - Kim, Soo Kil

N1 - Funding Information: This research was supported by the Korean Ministry of Knowledge Economy through the Korea Institute of Energy Technology Evaluation and Planning under contract number 2008-N-FC08-P-01 (S. J. H, S. J. Y, S.–K. K, S. W. N, and T.–H. L,), by the KIST Institutional Program under contract number 2E22873-12-020 (S.–K. K. and E. C.) and by the Joint Research Project funded by the Korea Research Council of Fundamental Science and Technology (KRCF), as a part of the ‘‘development and mechanism study of high performance and durable components for high-temperature PEMFCs.’’ (J. H. J). It was also partially supported by Korean Ministry of Education, Science and Technology through the National Research Foundation of Korea under contract number 2009-0082471. (J. S. and S.-C. L.).

PY - 2013

Y1 - 2013

N2 - Core at shell electrocatalysts for fuel cells have the advantages of a high utilization of Pt and the modification of its electronic structures toward enhancement of the activities. In this study, we suggest both a theoretical background for the design of highly active and stable core@shell/C and a novel facile synthetic strategy for their preparation. Using density functional theory calculations guided by the oxygen adsorption energy and vacancy formation energy, Pd3Cu1@Pt/C was selected as the most suitable candidate for the oxygen reduction reaction in terms of its activity and stability. These predictions were experimentally verified by the surfactant-free synthesis of Pd3Cu1/C cores and the selective Pt shell formation using a Hantzsch ester as a reducing agent. In a similar fashion, Pd@Pd 4Ir6/C catalyst was also designed and synthesized for the hydrogen oxidation reaction. The developed catalysts exhibited high activity, high selectivity, and 4,000 h of long-term durability at the single-cell level.

AB - Core at shell electrocatalysts for fuel cells have the advantages of a high utilization of Pt and the modification of its electronic structures toward enhancement of the activities. In this study, we suggest both a theoretical background for the design of highly active and stable core@shell/C and a novel facile synthetic strategy for their preparation. Using density functional theory calculations guided by the oxygen adsorption energy and vacancy formation energy, Pd3Cu1@Pt/C was selected as the most suitable candidate for the oxygen reduction reaction in terms of its activity and stability. These predictions were experimentally verified by the surfactant-free synthesis of Pd3Cu1/C cores and the selective Pt shell formation using a Hantzsch ester as a reducing agent. In a similar fashion, Pd@Pd 4Ir6/C catalyst was also designed and synthesized for the hydrogen oxidation reaction. The developed catalysts exhibited high activity, high selectivity, and 4,000 h of long-term durability at the single-cell level.

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Supported core at shell electrocatalysts for fuel cells: Close encounter with reality

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