Alkali resistant Ni-loaded yolk-shell catalysts for direct internal reforming in molten carbonate fuel cells

Won Jun Jang; Young Jun Hong; Hak Min Kim; Jae Oh Shim; Hyun Seog Roh; Yun Chan Kang

doi:10.1016/j.jpowsour.2017.03.117

Alkali resistant Ni-loaded yolk-shell catalysts for direct internal reforming in molten carbonate fuel cells

Won Jun Jang, Young Jun Hong, Hak Min Kim, Jae Oh Shim, Hyun Seog Roh, Yun Chan Kang

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

14 Citations (Scopus)

Abstract

A facile and scalable spray pyrolysis process is applied to synthesize multi-shelled Ni-loaded yolk-shell catalysts on various supports (Al₂O₃, CeO₂, ZrO₂, and La(OH)₃). The prepared catalysts are applied to direct internal reforming (DIR) in a molten carbonate fuel cell (MCFC). Even on exposure to alkali hydroxide vapors, the Ni-loaded yolk-shell catalysts remain highly active for DIR-MCFCs. The Ni@Al₂O₃ microspheres show the highest conversion (92%) of CH₄ and the best stability among the prepared Ni-loaded yolk-shell catalysts. Although the initial CH₄ conversion of the Ni@ZrO₂ microspheres is higher than that of the Ni@CeO₂ microspheres, the Ni@CeO₂ microspheres are more stable. The catalytic performance is strongly dependent on the surface area and acidity and also partly dependent on the reducibility. The acidic nature of Al₂O₃ combined with its high surface area and yolk-shell structure enhances the adsorption of CH₄ and resistance against alkali poisoning, resulting in efficient DIR-MCFC reactions.

Original language	English
Pages (from-to)	1-8
Number of pages	8
Journal	Journal of Power Sources
Volume	352
DOIs	https://doi.org/10.1016/j.jpowsour.2017.03.117
Publication status	Published - 2017

Keywords

Acidity
Alkali resistance
Direct internal reforming
Spray pyrolysis
Yolk-shell

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

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

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10.1016/j.jpowsour.2017.03.117

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title = "Alkali resistant Ni-loaded yolk-shell catalysts for direct internal reforming in molten carbonate fuel cells",

abstract = "A facile and scalable spray pyrolysis process is applied to synthesize multi-shelled Ni-loaded yolk-shell catalysts on various supports (Al2O3, CeO2, ZrO2, and La(OH)3). The prepared catalysts are applied to direct internal reforming (DIR) in a molten carbonate fuel cell (MCFC). Even on exposure to alkali hydroxide vapors, the Ni-loaded yolk-shell catalysts remain highly active for DIR-MCFCs. The Ni@Al2O3 microspheres show the highest conversion (92%) of CH4 and the best stability among the prepared Ni-loaded yolk-shell catalysts. Although the initial CH4 conversion of the Ni@ZrO2 microspheres is higher than that of the Ni@CeO2 microspheres, the Ni@CeO2 microspheres are more stable. The catalytic performance is strongly dependent on the surface area and acidity and also partly dependent on the reducibility. The acidic nature of Al2O3 combined with its high surface area and yolk-shell structure enhances the adsorption of CH4 and resistance against alkali poisoning, resulting in efficient DIR-MCFC reactions.",

keywords = "Acidity, Alkali resistance, Direct internal reforming, Spray pyrolysis, Yolk-shell",

author = "Jang, {Won Jun} and Hong, {Young Jun} and Kim, {Hak Min} and Shim, {Jae Oh} and Roh, {Hyun Seog} and Kang, {Yun Chan}",

year = "2017",

doi = "10.1016/j.jpowsour.2017.03.117",

language = "English",

volume = "352",

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journal = "Journal of Power Sources",

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TY - JOUR

T1 - Alkali resistant Ni-loaded yolk-shell catalysts for direct internal reforming in molten carbonate fuel cells

AU - Jang, Won Jun

AU - Hong, Young Jun

AU - Kim, Hak Min

AU - Shim, Jae Oh

AU - Roh, Hyun Seog

AU - Kang, Yun Chan

PY - 2017

Y1 - 2017

N2 - A facile and scalable spray pyrolysis process is applied to synthesize multi-shelled Ni-loaded yolk-shell catalysts on various supports (Al2O3, CeO2, ZrO2, and La(OH)3). The prepared catalysts are applied to direct internal reforming (DIR) in a molten carbonate fuel cell (MCFC). Even on exposure to alkali hydroxide vapors, the Ni-loaded yolk-shell catalysts remain highly active for DIR-MCFCs. The Ni@Al2O3 microspheres show the highest conversion (92%) of CH4 and the best stability among the prepared Ni-loaded yolk-shell catalysts. Although the initial CH4 conversion of the Ni@ZrO2 microspheres is higher than that of the Ni@CeO2 microspheres, the Ni@CeO2 microspheres are more stable. The catalytic performance is strongly dependent on the surface area and acidity and also partly dependent on the reducibility. The acidic nature of Al2O3 combined with its high surface area and yolk-shell structure enhances the adsorption of CH4 and resistance against alkali poisoning, resulting in efficient DIR-MCFC reactions.

AB - A facile and scalable spray pyrolysis process is applied to synthesize multi-shelled Ni-loaded yolk-shell catalysts on various supports (Al2O3, CeO2, ZrO2, and La(OH)3). The prepared catalysts are applied to direct internal reforming (DIR) in a molten carbonate fuel cell (MCFC). Even on exposure to alkali hydroxide vapors, the Ni-loaded yolk-shell catalysts remain highly active for DIR-MCFCs. The Ni@Al2O3 microspheres show the highest conversion (92%) of CH4 and the best stability among the prepared Ni-loaded yolk-shell catalysts. Although the initial CH4 conversion of the Ni@ZrO2 microspheres is higher than that of the Ni@CeO2 microspheres, the Ni@CeO2 microspheres are more stable. The catalytic performance is strongly dependent on the surface area and acidity and also partly dependent on the reducibility. The acidic nature of Al2O3 combined with its high surface area and yolk-shell structure enhances the adsorption of CH4 and resistance against alkali poisoning, resulting in efficient DIR-MCFC reactions.

KW - Acidity

KW - Alkali resistance

KW - Direct internal reforming

KW - Spray pyrolysis

KW - Yolk-shell

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ER -

Alkali resistant Ni-loaded yolk-shell catalysts for direct internal reforming in molten carbonate fuel cells

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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