Carbon free SiO2–SO3H supported Pt bifunctional electrocatalyst for unitized regenerative fuel cells

Sung Hee Roh; T. Sadhasivam; Hansung Kim; Jeong Hun Park; Ho Young Jung

doi:10.1016/j.ijhydene.2016.09.062

Carbon free SiO₂–SO₃H supported Pt bifunctional electrocatalyst for unitized regenerative fuel cells

Sung Hee Roh, T. Sadhasivam, Hansung Kim, Jeong Hun Park, Ho Young Jung

Department of Chemical and Biomolecular Engineering

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

20 Citations (Scopus)

Abstract

The electrochemical performance of sulfonated silica-supported Pt electrocatalyst investigated as a bifunctional oxygen electrode for unitized regenerative fuel cell (URFC) system. The measured electrochemical surface area values are 23.02 and 22.96 m² g⁻¹ for the Pt black and 80 wt% Pt/SiO₂–SO₃H catalysts, respectively. The silica support is not prohibiting the electrical conductivity of Pt in the Pt/SiO₂–SO₃H electrocatalyst due to the high loading of Pt on the supporter. The oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in the fuel cell and water electrolyzer modes were carried out in a unit cell for the Pt/C, Pt/SiO₂, and Pt/SiO₂–SO₃H electrocatalysts. The Pt/SiO₂–SO₃H catalyst is exhibit better performance in oxygen reduction (hydrogen oxidation) and oxygen evolution (hydrogen evolution) reactions during cyclic processing due to the high proton conductivity of the sulfonated silica supporter. This result means that the sulfonic acid functional group on the support material (SiO₂–SO₃H) enhances proton conduction in the catalyst layer. Therefore, the ohmic resistance is decrease in the unit cell. Hence, the sulfonated silica-supported Pt electrocatalyst is a bifunctional electrocatalyst candidate that can be used in the operation of a URFC.

Original language	English
Pages (from-to)	20650-20659
Number of pages	10
Journal	International Journal of Hydrogen Energy
Volume	41
Issue number	45
DOIs	https://doi.org/10.1016/j.ijhydene.2016.09.062
Publication status	Published - 2016 Dec 7

Bibliographical note

Funding Information:
This work was supported by the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resources from the Ministry of Trade, Industry & Energy, Republic of Korea. (No. 20153030031670) and the National Research Foundation of Korea (NRF) grand funded by the Korea Government (MSIP) (NRF-2014R1A2A2A03002616).

Publisher Copyright:
© 2016 Hydrogen Energy Publications LLC

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

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

Access to Document

10.1016/j.ijhydene.2016.09.062

Cite this

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title = "Carbon free SiO2–SO3H supported Pt bifunctional electrocatalyst for unitized regenerative fuel cells",

abstract = "The electrochemical performance of sulfonated silica-supported Pt electrocatalyst investigated as a bifunctional oxygen electrode for unitized regenerative fuel cell (URFC) system. The measured electrochemical surface area values are 23.02 and 22.96 m2 g−1 for the Pt black and 80 wt% Pt/SiO2–SO3H catalysts, respectively. The silica support is not prohibiting the electrical conductivity of Pt in the Pt/SiO2–SO3H electrocatalyst due to the high loading of Pt on the supporter. The oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in the fuel cell and water electrolyzer modes were carried out in a unit cell for the Pt/C, Pt/SiO2, and Pt/SiO2–SO3H electrocatalysts. The Pt/SiO2–SO3H catalyst is exhibit better performance in oxygen reduction (hydrogen oxidation) and oxygen evolution (hydrogen evolution) reactions during cyclic processing due to the high proton conductivity of the sulfonated silica supporter. This result means that the sulfonic acid functional group on the support material (SiO2–SO3H) enhances proton conduction in the catalyst layer. Therefore, the ohmic resistance is decrease in the unit cell. Hence, the sulfonated silica-supported Pt electrocatalyst is a bifunctional electrocatalyst candidate that can be used in the operation of a URFC.",

author = "Roh, {Sung Hee} and T. Sadhasivam and Hansung Kim and Park, {Jeong Hun} and Jung, {Ho Young}",

note = "Funding Information: This work was supported by the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resources from the Ministry of Trade, Industry & Energy, Republic of Korea. (No. 20153030031670) and the National Research Foundation of Korea (NRF) grand funded by the Korea Government (MSIP) (NRF-2014R1A2A2A03002616). Publisher Copyright: {\textcopyright} 2016 Hydrogen Energy Publications LLC",

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AU - Roh, Sung Hee

AU - Sadhasivam, T.

AU - Kim, Hansung

AU - Park, Jeong Hun

AU - Jung, Ho Young

N1 - Funding Information: This work was supported by the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resources from the Ministry of Trade, Industry & Energy, Republic of Korea. (No. 20153030031670) and the National Research Foundation of Korea (NRF) grand funded by the Korea Government (MSIP) (NRF-2014R1A2A2A03002616). Publisher Copyright: © 2016 Hydrogen Energy Publications LLC

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N2 - The electrochemical performance of sulfonated silica-supported Pt electrocatalyst investigated as a bifunctional oxygen electrode for unitized regenerative fuel cell (URFC) system. The measured electrochemical surface area values are 23.02 and 22.96 m2 g−1 for the Pt black and 80 wt% Pt/SiO2–SO3H catalysts, respectively. The silica support is not prohibiting the electrical conductivity of Pt in the Pt/SiO2–SO3H electrocatalyst due to the high loading of Pt on the supporter. The oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in the fuel cell and water electrolyzer modes were carried out in a unit cell for the Pt/C, Pt/SiO2, and Pt/SiO2–SO3H electrocatalysts. The Pt/SiO2–SO3H catalyst is exhibit better performance in oxygen reduction (hydrogen oxidation) and oxygen evolution (hydrogen evolution) reactions during cyclic processing due to the high proton conductivity of the sulfonated silica supporter. This result means that the sulfonic acid functional group on the support material (SiO2–SO3H) enhances proton conduction in the catalyst layer. Therefore, the ohmic resistance is decrease in the unit cell. Hence, the sulfonated silica-supported Pt electrocatalyst is a bifunctional electrocatalyst candidate that can be used in the operation of a URFC.

AB - The electrochemical performance of sulfonated silica-supported Pt electrocatalyst investigated as a bifunctional oxygen electrode for unitized regenerative fuel cell (URFC) system. The measured electrochemical surface area values are 23.02 and 22.96 m2 g−1 for the Pt black and 80 wt% Pt/SiO2–SO3H catalysts, respectively. The silica support is not prohibiting the electrical conductivity of Pt in the Pt/SiO2–SO3H electrocatalyst due to the high loading of Pt on the supporter. The oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in the fuel cell and water electrolyzer modes were carried out in a unit cell for the Pt/C, Pt/SiO2, and Pt/SiO2–SO3H electrocatalysts. The Pt/SiO2–SO3H catalyst is exhibit better performance in oxygen reduction (hydrogen oxidation) and oxygen evolution (hydrogen evolution) reactions during cyclic processing due to the high proton conductivity of the sulfonated silica supporter. This result means that the sulfonic acid functional group on the support material (SiO2–SO3H) enhances proton conduction in the catalyst layer. Therefore, the ohmic resistance is decrease in the unit cell. Hence, the sulfonated silica-supported Pt electrocatalyst is a bifunctional electrocatalyst candidate that can be used in the operation of a URFC.

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