Effect of Heat Treatment on Structure of Carbon Shell-Encapsulated Pt Nanoparticles for Fuel Cells

Polymer electrolyte membrane fuel cells (PEMFCs) have attracted much attention as highly efficient, eco-friendly energy conversion devices. However, carbon-supported Pt (Pt/C) catalysts for PEMFCs still have several problems, such as low long-term stability, to be widely commercialized in fuel cell...

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Published in:	Nanomaterials (Basel, Switzerland) Vol. 14; no. 11; p. 924
Main Authors:	Davletbaev, Khikmatulla, Chougule, Sourabh S, Min, Jiho, Ko, Keonwoo, Kim, Yunjin, Choi, Hyeonwoo, Choi, Yoonseong, Chavan, Abhishek A, Pak, Beomjun, Rakhmonov, Ikromjon U, Jung, Namgee
Format:	Journal Article
Language:	English
Published:	Switzerland MDPI AG 24-05-2024 MDPI
Subjects:	Annealing Carbon carbon shell Catalysts Chemical reduction Chemical vapor deposition Commercialization Electrodes Electrolytes Electrolytic cells Energy conversion Fabrication flow rate Flow rates Force and energy Fuel cell industry Fuel cells Fuel technology Gases H2 content Heat treating Heat treatment Heat treatments Investigations Metal industry Nanoparticles Oxygen reduction reactions Particle size Polymers proton exchange membrane fuel cell Proton exchange membrane fuel cells Pt catalyst Stability United States > US South Korea Netherlands H2 content proton exchange membrane fuel cell durability Pt catalyst annealing carbon shell oxygen reduction reaction flow rate
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Summary:	Polymer electrolyte membrane fuel cells (PEMFCs) have attracted much attention as highly efficient, eco-friendly energy conversion devices. However, carbon-supported Pt (Pt/C) catalysts for PEMFCs still have several problems, such as low long-term stability, to be widely commercialized in fuel cell applications. To address the stability issues of Pt/C such as the dissolution, detachment, and agglomeration of Pt nanoparticles under harsh operating conditions, we design an interesting fabrication process to produce a highly active and durable Pt catalyst by introducing a robust carbon shell on the Pt surface. Furthermore, this approach provides insights into how to regulate the carbon shell layer for fuel cell applications. Through the application of an appropriate amount of H gas during heat treatment, the carbon shell pores, which are integral to the structure, can be systematically modulated to facilitate oxygen adsorption for the oxygen reduction reaction. Simultaneously, the carbon shell functions as a protective barrier, preventing catalyst degradation. In this regard, we investigate an in-depth analysis of the effects of critical parameters including H content and the flow rate of H /N mixed gas during heat treatment to prepare better catalysts.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	2079-4991 2079-4991
DOI:	10.3390/nano14110924