Graphene oxide nanosheet with high proton conductivity

Mohammad Razaul Karim; Kazuto Hatakeyama; Takeshi Matsui; Hiroshi Takehira; Takaaki Taniguchi; Michio Koinuma; Yasumichi Matsumoto; Tomoyuki Akutagawa; Takayoshi Nakamura; Shin Ichiro Noro; Teppei Yamada; Hiroshi Kitagawa; Shinya Hayami

doi:10.1021/ja401060q

Graphene oxide nanosheet with high proton conductivity

Mohammad Razaul Karim, Kazuto Hatakeyama, Takeshi Matsui, Hiroshi Takehira, Takaaki Taniguchi, Michio Koinuma, Yasumichi Matsumoto, Tomoyuki Akutagawa, Takayoshi Nakamura, Shin Ichiro Noro, Teppei Yamada, Hiroshi Kitagawa, Shinya Hayami

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

439 Citations (Scopus)

Abstract

We measured the proton conductivity of bulk graphite oxide (GO′), a graphene oxide/proton hybrid (GO-H), and a graphene oxide (GO) nanosheet for the first time. GO is a well-known electronic insulator, but for proton conduction we observed the reverse trend, as it exhibited superionic conductivity. The hydrophilic sites present in GO as -O-, -OH, and -COOH functional groups attract the protons, which propagate through hydrogen-bonding networks along the adsorbed water film. The proton conductivities of GO′ and GO-H at 100% humidity were ∼10^-4 and ∼10^-5 S cm^-1, respectively, whereas that for GO was amazingly high, nearly 10^-2 S cm^-1. This finding indicates the possibility of GO-based perfect two-dimensional proton-conductive materials for applications in fuel cells, sensors, and so on.

Original language	English
Pages (from-to)	8097-8100
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	135
Issue number	22
DOIs	https://doi.org/10.1021/ja401060q
Publication status	Published - 2013 Jun 5

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja401060q

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title = "Graphene oxide nanosheet with high proton conductivity",

abstract = "We measured the proton conductivity of bulk graphite oxide (GO′), a graphene oxide/proton hybrid (GO-H), and a graphene oxide (GO) nanosheet for the first time. GO is a well-known electronic insulator, but for proton conduction we observed the reverse trend, as it exhibited superionic conductivity. The hydrophilic sites present in GO as -O-, -OH, and -COOH functional groups attract the protons, which propagate through hydrogen-bonding networks along the adsorbed water film. The proton conductivities of GO′ and GO-H at 100% humidity were ∼10-4 and ∼10-5 S cm-1, respectively, whereas that for GO was amazingly high, nearly 10-2 S cm-1. This finding indicates the possibility of GO-based perfect two-dimensional proton-conductive materials for applications in fuel cells, sensors, and so on.",

author = "Karim, {Mohammad Razaul} and Kazuto Hatakeyama and Takeshi Matsui and Hiroshi Takehira and Takaaki Taniguchi and Michio Koinuma and Yasumichi Matsumoto and Tomoyuki Akutagawa and Takayoshi Nakamura and Noro, {Shin Ichiro} and Teppei Yamada and Hiroshi Kitagawa and Shinya Hayami",

year = "2013",

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doi = "10.1021/ja401060q",

language = "English",

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T1 - Graphene oxide nanosheet with high proton conductivity

AU - Karim, Mohammad Razaul

AU - Hatakeyama, Kazuto

AU - Matsui, Takeshi

AU - Takehira, Hiroshi

AU - Taniguchi, Takaaki

AU - Koinuma, Michio

AU - Matsumoto, Yasumichi

AU - Akutagawa, Tomoyuki

AU - Nakamura, Takayoshi

AU - Noro, Shin Ichiro

AU - Yamada, Teppei

AU - Kitagawa, Hiroshi

AU - Hayami, Shinya

PY - 2013/6/5

Y1 - 2013/6/5

N2 - We measured the proton conductivity of bulk graphite oxide (GO′), a graphene oxide/proton hybrid (GO-H), and a graphene oxide (GO) nanosheet for the first time. GO is a well-known electronic insulator, but for proton conduction we observed the reverse trend, as it exhibited superionic conductivity. The hydrophilic sites present in GO as -O-, -OH, and -COOH functional groups attract the protons, which propagate through hydrogen-bonding networks along the adsorbed water film. The proton conductivities of GO′ and GO-H at 100% humidity were ∼10-4 and ∼10-5 S cm-1, respectively, whereas that for GO was amazingly high, nearly 10-2 S cm-1. This finding indicates the possibility of GO-based perfect two-dimensional proton-conductive materials for applications in fuel cells, sensors, and so on.

AB - We measured the proton conductivity of bulk graphite oxide (GO′), a graphene oxide/proton hybrid (GO-H), and a graphene oxide (GO) nanosheet for the first time. GO is a well-known electronic insulator, but for proton conduction we observed the reverse trend, as it exhibited superionic conductivity. The hydrophilic sites present in GO as -O-, -OH, and -COOH functional groups attract the protons, which propagate through hydrogen-bonding networks along the adsorbed water film. The proton conductivities of GO′ and GO-H at 100% humidity were ∼10-4 and ∼10-5 S cm-1, respectively, whereas that for GO was amazingly high, nearly 10-2 S cm-1. This finding indicates the possibility of GO-based perfect two-dimensional proton-conductive materials for applications in fuel cells, sensors, and so on.

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JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

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Graphene oxide nanosheet with high proton conductivity

Abstract

ASJC Scopus subject areas

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