Replacement effect of fresh electrolyte on the accelerated deactivation test and recovery process of Pt/C catalysts in a half-cell system

Kim Han Young; Im Dae Soon; Son U.-Hyeok; Lee Hae Ri; Joh Han-Ik

doi:10.1007/s42823-021-00310-w

Replacement effect of fresh electrolyte on the accelerated deactivation test and recovery process of Pt/C catalysts in a half-cell system

Carbon Letters
Abbr : Carbon Lett.
2022, 32(1), pp.313-319
DOI : 10.1007/s42823-021-00310-w
Publisher : Korean Carbon Society
Research Area : Natural Science > Natural Science General > Other Natural Sciences General
Received : October 14, 2021
Accepted : November 24, 2021
Published : January 1, 2022

Kim Han Young ¹, Im Dae Soon ¹, Son U.-Hyeok ¹, Lee Hae Ri ², Joh Han-Ik ²

¹건국대학교 에너지공학과
²건국대학교

Accredited

ABSTRACT

The poor durability issue of polymer electrolyte membrane fuel cells is a major concern in terms of their commercialization. To understand the degradation mechanism of the catalysts, an accelerated durability test (ADT) was conducted according to the protocol established by internationally accredited organizations. However, reversible and irreversible factors contributing to the loss of activity have not yet been practically segregated because of the limitations of a batch-type three-electrode system, leading to the misunderstanding of the deactivation mechanism. In this study, we investigated the effect of a fresh electrolyte on the ADT and recovery process. When the fresh electrolyte was used at every range of the cycle, the chances of incorrect detection of dissolved CO and Pt ions in the electrolyte were very low. When the same electrolyte was used throughout the test, the accumulated Pt ions were deposited on the surface of the Pt nanoparticles or carbon support, affording an increased electrochemical surface area (ECSA) of Pt. Therefore, we believe that periodic replacement by a fresh electrolyte or a continuous-flow electrolyte is essential for the precise determination of the structural and electrochemical changes in Pt/C catalysts.

KEYWORDS

PEMFC, Pt/C catalyst, Catalyst durability, Degradation mechanism, Recovery process

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This paper was written with support from the National Research Foundation of Korea.

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Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 6.04

Replacement effect of fresh electrolyte on the accelerated deactivation test and recovery process of Pt/C catalysts in a half-cell system

ABSTRACT

KEYWORDS

Citation status

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2024-07-26)

Total Citation Counts(KCI+WOS) (6) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (6) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2024-10-01)

* References for papers published after 2023 are currently being built.

Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 6.04

Replacement effect of fresh electrolyte on the accelerated deactivation test and recovery process of Pt/C catalysts in a half-cell system

ABSTRACT

KEYWORDS

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WoS Citation Counts (3) This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2024-07-26)

Total Citation Counts(KCI+WOS) (6) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (6) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2024-10-01)

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This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2024-07-26)

* References for papers published after 2023 are currently being built.