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

GREEN SCHOOL (Graduate School of Energy and Environment)

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

66 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.).

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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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AU - Hwang, Seung Jun

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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

Abstract

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