Platinum nanocluster catalysts supported on Marimo carbonviascalable dry deposition synthesis

Naoyuki Hirata; Yui Katsura; Hiroyuki Gunji; Masahide Tona; Keizo Tsukamoto; Mika Eguchi; Toshihiro Ando; Atsushi Nakajima

doi:10.1039/d1ra07717a

Platinum nanocluster catalysts supported on Marimo carbonviascalable dry deposition synthesis

Naoyuki Hirata, Yui Katsura, Hiroyuki Gunji, Masahide Tona, Keizo Tsukamoto, Mika Eguchi, Toshihiro Ando, Atsushi Nakajima

Department of Chemistry

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

3 Citations (Scopus)

Abstract

The development of efficient fuel cells greatly promotes reducing the consumption of fossil energy, and it is crucial to enhance the platinum (Pt) catalytic activity by optimizing both the nanoparticle size and support effect. In this study, we generate a smaller and uniform size of naked Pt nanocluster (NC) catalystsviaa dry process in the gas phase, and using the direct powder embedded trapping method, the Pt NCs arespatioselectivelysupported on Marimo carbon (MC) that comprises a high density of carbon nanofilaments. At a minimum Pt loading of 0.05 mg_Ptcm⁻²for both the anode and cathode in a single cell configuration, a membrane-electrode assembly (MEA) formed by the dry-deposition Pt-NC(d)/MC exhibits superior power density (rated) of 0.105 g_PtkW⁻¹at a current density of 1.2 A cm⁻², which is better output power density than the conventional MEA formed by Pt catalystsviaa wet process. The origin of the improved performance is investigated using transmission electron microscopy; dry-deposition Pt catalysts that are monodispersely loaded on the outer surface of MC can facilitate not only the gas reaction but also leaving the generated water. The present results demonstrate that the dry deposition of Pt NCs on MC can be used as a scalable catalyst synthesis method to reduce the Pt loading.

Original language	English
Pages (from-to)	39216-39222
Number of pages	7
Journal	RSC Advances
Volume	11
Issue number	62
DOIs	https://doi.org/10.1039/d1ra07717a
Publication status	Published - 2021 Dec 8

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)

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title = "Platinum nanocluster catalysts supported on Marimo carbonviascalable dry deposition synthesis",

abstract = "The development of efficient fuel cells greatly promotes reducing the consumption of fossil energy, and it is crucial to enhance the platinum (Pt) catalytic activity by optimizing both the nanoparticle size and support effect. In this study, we generate a smaller and uniform size of naked Pt nanocluster (NC) catalystsviaa dry process in the gas phase, and using the direct powder embedded trapping method, the Pt NCs arespatioselectivelysupported on Marimo carbon (MC) that comprises a high density of carbon nanofilaments. At a minimum Pt loading of 0.05 mgPtcm−2for both the anode and cathode in a single cell configuration, a membrane-electrode assembly (MEA) formed by the dry-deposition Pt-NC(d)/MC exhibits superior power density (rated) of 0.105 gPtkW−1at a current density of 1.2 A cm−2, which is better output power density than the conventional MEA formed by Pt catalystsviaa wet process. The origin of the improved performance is investigated using transmission electron microscopy; dry-deposition Pt catalysts that are monodispersely loaded on the outer surface of MC can facilitate not only the gas reaction but also leaving the generated water. The present results demonstrate that the dry deposition of Pt NCs on MC can be used as a scalable catalyst synthesis method to reduce the Pt loading.",

author = "Naoyuki Hirata and Yui Katsura and Hiroyuki Gunji and Masahide Tona and Keizo Tsukamoto and Mika Eguchi and Toshihiro Ando and Atsushi Nakajima",

note = "Funding Information: The authors are grateful to Dr H. Tsunoyama for his experimental and scientific assistance, to Ms S. Haruta and Mr T. Gifu for preparing figures, Dr S. Shimomura in NIMS for measuring the TEM images, and Dr F. Sekine (FC Development Co., Ltd.) for fabricating the MEA. This work was partly supported by JSPS KAKENHI of Grants-in-Aid for Scientific Research (A) Grant Nos. 15H02002 and 19H00890, of Challenging Research (Pioneering) Grant No. 17H06226. Funding Information: The authors are grateful to Dr H. Tsunoyama for his experimental and scientic assistance, to Ms S. Haruta and Mr T. Gifu for preparing gures, Dr S. Shimomura in NIMS for measuring the TEM images, and Dr F. Sekine (FC Development Co., Ltd.) for fabricating the MEA. This work was partly supported by JSPS KAKENHI of Grants-in-Aid for Scientic Research (A) Grant Nos. 15H02002 and 19H00890, of Challenging Research (Pioneering) Grant No. 17H06226. Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2021.",

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doi = "10.1039/d1ra07717a",

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T1 - Platinum nanocluster catalysts supported on Marimo carbonviascalable dry deposition synthesis

AU - Hirata, Naoyuki

AU - Katsura, Yui

AU - Gunji, Hiroyuki

AU - Tona, Masahide

AU - Tsukamoto, Keizo

AU - Eguchi, Mika

AU - Ando, Toshihiro

AU - Nakajima, Atsushi

N1 - Funding Information: The authors are grateful to Dr H. Tsunoyama for his experimental and scientific assistance, to Ms S. Haruta and Mr T. Gifu for preparing figures, Dr S. Shimomura in NIMS for measuring the TEM images, and Dr F. Sekine (FC Development Co., Ltd.) for fabricating the MEA. This work was partly supported by JSPS KAKENHI of Grants-in-Aid for Scientific Research (A) Grant Nos. 15H02002 and 19H00890, of Challenging Research (Pioneering) Grant No. 17H06226. Funding Information: The authors are grateful to Dr H. Tsunoyama for his experimental and scientic assistance, to Ms S. Haruta and Mr T. Gifu for preparing gures, Dr S. Shimomura in NIMS for measuring the TEM images, and Dr F. Sekine (FC Development Co., Ltd.) for fabricating the MEA. This work was partly supported by JSPS KAKENHI of Grants-in-Aid for Scientic Research (A) Grant Nos. 15H02002 and 19H00890, of Challenging Research (Pioneering) Grant No. 17H06226. Publisher Copyright: © The Royal Society of Chemistry 2021.

PY - 2021/12/8

Y1 - 2021/12/8

N2 - The development of efficient fuel cells greatly promotes reducing the consumption of fossil energy, and it is crucial to enhance the platinum (Pt) catalytic activity by optimizing both the nanoparticle size and support effect. In this study, we generate a smaller and uniform size of naked Pt nanocluster (NC) catalystsviaa dry process in the gas phase, and using the direct powder embedded trapping method, the Pt NCs arespatioselectivelysupported on Marimo carbon (MC) that comprises a high density of carbon nanofilaments. At a minimum Pt loading of 0.05 mgPtcm−2for both the anode and cathode in a single cell configuration, a membrane-electrode assembly (MEA) formed by the dry-deposition Pt-NC(d)/MC exhibits superior power density (rated) of 0.105 gPtkW−1at a current density of 1.2 A cm−2, which is better output power density than the conventional MEA formed by Pt catalystsviaa wet process. The origin of the improved performance is investigated using transmission electron microscopy; dry-deposition Pt catalysts that are monodispersely loaded on the outer surface of MC can facilitate not only the gas reaction but also leaving the generated water. The present results demonstrate that the dry deposition of Pt NCs on MC can be used as a scalable catalyst synthesis method to reduce the Pt loading.

AB - The development of efficient fuel cells greatly promotes reducing the consumption of fossil energy, and it is crucial to enhance the platinum (Pt) catalytic activity by optimizing both the nanoparticle size and support effect. In this study, we generate a smaller and uniform size of naked Pt nanocluster (NC) catalystsviaa dry process in the gas phase, and using the direct powder embedded trapping method, the Pt NCs arespatioselectivelysupported on Marimo carbon (MC) that comprises a high density of carbon nanofilaments. At a minimum Pt loading of 0.05 mgPtcm−2for both the anode and cathode in a single cell configuration, a membrane-electrode assembly (MEA) formed by the dry-deposition Pt-NC(d)/MC exhibits superior power density (rated) of 0.105 gPtkW−1at a current density of 1.2 A cm−2, which is better output power density than the conventional MEA formed by Pt catalystsviaa wet process. The origin of the improved performance is investigated using transmission electron microscopy; dry-deposition Pt catalysts that are monodispersely loaded on the outer surface of MC can facilitate not only the gas reaction but also leaving the generated water. The present results demonstrate that the dry deposition of Pt NCs on MC can be used as a scalable catalyst synthesis method to reduce the Pt loading.

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Platinum nanocluster catalysts supported on Marimo carbonviascalable dry deposition synthesis

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