Evaluation for sintering of electrocatalysts and its effect on voltage drops in high-temperature proton exchange membrane fuel cells (HT-PEMFC)

Ai Suzuki; Yuka Oono; Mark C. Williams; Ryuji Miura; Kenji Inaba; Nozomu Hatakeyama; Hiromitsu Takaba; Michio Hori; Akira Miyamoto

doi:10.1016/j.ijhydene.2012.09.016

Evaluation for sintering of electrocatalysts and its effect on voltage drops in high-temperature proton exchange membrane fuel cells (HT-PEMFC)

Ai Suzuki, Yuka Oono, Mark C. Williams, Ryuji Miura, Kenji Inaba, Nozomu Hatakeyama, Hiromitsu Takaba, Michio Hori, Akira Miyamoto

New Industry Creation Hatchery Center (NICHe)

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

27 Citations (Scopus)

Abstract

Durability performance such as sintering and voltage drops of HT-PEMFC was theoretically evaluated under non-humid conditions at 150 °C, 170 °C and 190 °C. The quantum chemical molecular dynamics showed that the affinity of the platinum (Pt) electrocatalysts with carbon support decreased with increasing temperature. The degree of agglomeration of electrocatalysts over time simulated by three-dimensional kinetic Monte Carlo method was compared and quantitatively agreed with experimentally measured Transmission Electron Microscopy (TEM) results. Agglomeration of electrocatalysts due to the sintering caused losses of electrochemically active surface area, and found to be occurred more severe as temperature increased. Decreased rate of the proton conductivity due to the evaporation of phosphoric acid affected voltage drops as temperature increased. A theoretical breakdown of the voltage drops indicated that the voltage drops that occurred during the first several hundreds of hours and those occurring for the latter stage were due to different effects.

Original language	English
Pages (from-to)	18272-18289
Number of pages	18
Journal	International Journal of Hydrogen Energy
Volume	37
Issue number	23
DOIs	https://doi.org/10.1016/j.ijhydene.2012.09.016
Publication status	Published - 2012 Dec

Keywords

Durability
Electrocatalyst
High-temperature PEMFC
Phosphoric acid
Sintering
Voltage drops

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.ijhydene.2012.09.016

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Suzuki, A., Oono, Y., Williams, M. C., Miura, R., Inaba, K., Hatakeyama, N., Takaba, H., Hori, M., & Miyamoto, A. (2012). Evaluation for sintering of electrocatalysts and its effect on voltage drops in high-temperature proton exchange membrane fuel cells (HT-PEMFC). International Journal of Hydrogen Energy, 37(23), 18272-18289. https://doi.org/10.1016/j.ijhydene.2012.09.016

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title = "Evaluation for sintering of electrocatalysts and its effect on voltage drops in high-temperature proton exchange membrane fuel cells (HT-PEMFC)",

abstract = "Durability performance such as sintering and voltage drops of HT-PEMFC was theoretically evaluated under non-humid conditions at 150 °C, 170 °C and 190 °C. The quantum chemical molecular dynamics showed that the affinity of the platinum (Pt) electrocatalysts with carbon support decreased with increasing temperature. The degree of agglomeration of electrocatalysts over time simulated by three-dimensional kinetic Monte Carlo method was compared and quantitatively agreed with experimentally measured Transmission Electron Microscopy (TEM) results. Agglomeration of electrocatalysts due to the sintering caused losses of electrochemically active surface area, and found to be occurred more severe as temperature increased. Decreased rate of the proton conductivity due to the evaporation of phosphoric acid affected voltage drops as temperature increased. A theoretical breakdown of the voltage drops indicated that the voltage drops that occurred during the first several hundreds of hours and those occurring for the latter stage were due to different effects.",

keywords = "Durability, Electrocatalyst, High-temperature PEMFC, Phosphoric acid, Sintering, Voltage drops",

author = "Ai Suzuki and Yuka Oono and Williams, {Mark C.} and Ryuji Miura and Kenji Inaba and Nozomu Hatakeyama and Hiromitsu Takaba and Michio Hori and Akira Miyamoto",

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Suzuki, A, Oono, Y, Williams, MC, Miura, R, Inaba, K, Hatakeyama, N, Takaba, H, Hori, M & Miyamoto, A 2012, 'Evaluation for sintering of electrocatalysts and its effect on voltage drops in high-temperature proton exchange membrane fuel cells (HT-PEMFC)', International Journal of Hydrogen Energy, vol. 37, no. 23, pp. 18272-18289. https://doi.org/10.1016/j.ijhydene.2012.09.016

TY - JOUR

T1 - Evaluation for sintering of electrocatalysts and its effect on voltage drops in high-temperature proton exchange membrane fuel cells (HT-PEMFC)

AU - Suzuki, Ai

AU - Oono, Yuka

AU - Williams, Mark C.

AU - Miura, Ryuji

AU - Inaba, Kenji

AU - Hatakeyama, Nozomu

AU - Takaba, Hiromitsu

AU - Hori, Michio

AU - Miyamoto, Akira

PY - 2012/12

Y1 - 2012/12

N2 - Durability performance such as sintering and voltage drops of HT-PEMFC was theoretically evaluated under non-humid conditions at 150 °C, 170 °C and 190 °C. The quantum chemical molecular dynamics showed that the affinity of the platinum (Pt) electrocatalysts with carbon support decreased with increasing temperature. The degree of agglomeration of electrocatalysts over time simulated by three-dimensional kinetic Monte Carlo method was compared and quantitatively agreed with experimentally measured Transmission Electron Microscopy (TEM) results. Agglomeration of electrocatalysts due to the sintering caused losses of electrochemically active surface area, and found to be occurred more severe as temperature increased. Decreased rate of the proton conductivity due to the evaporation of phosphoric acid affected voltage drops as temperature increased. A theoretical breakdown of the voltage drops indicated that the voltage drops that occurred during the first several hundreds of hours and those occurring for the latter stage were due to different effects.

AB - Durability performance such as sintering and voltage drops of HT-PEMFC was theoretically evaluated under non-humid conditions at 150 °C, 170 °C and 190 °C. The quantum chemical molecular dynamics showed that the affinity of the platinum (Pt) electrocatalysts with carbon support decreased with increasing temperature. The degree of agglomeration of electrocatalysts over time simulated by three-dimensional kinetic Monte Carlo method was compared and quantitatively agreed with experimentally measured Transmission Electron Microscopy (TEM) results. Agglomeration of electrocatalysts due to the sintering caused losses of electrochemically active surface area, and found to be occurred more severe as temperature increased. Decreased rate of the proton conductivity due to the evaporation of phosphoric acid affected voltage drops as temperature increased. A theoretical breakdown of the voltage drops indicated that the voltage drops that occurred during the first several hundreds of hours and those occurring for the latter stage were due to different effects.

KW - Durability

KW - Electrocatalyst

KW - High-temperature PEMFC

KW - Phosphoric acid

KW - Sintering

KW - Voltage drops

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ER -

Evaluation for sintering of electrocatalysts and its effect on voltage drops in high-temperature proton exchange membrane fuel cells (HT-PEMFC)

Abstract

Keywords

UN SDGs

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