ZIF-8-based oxygen reduction reaction catalyst prepared from one-pot and stepwise ion- and liquid-assisted grinding modified with tris-1, 10-phenanthroline iron (II) perchlorate. (19th January 2022)

• Record Type: Journal Article
• Authors: Yang, Wonseok; Cha, Dowon; Lee, Wooyeol; Kim, Yongchan
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 6(2022)
• Page Start: 3846
• Page End: 3856
• Publication Date: 2022-01-19
• Subjects: PEMFC -- Oxygen reduction reaction -- Non-platinum group metal catalyst -- Ion- and liquid-assisted grinding -- One-pot synthesis; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.11.038
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this study, a one-pot ion- and liquid-assisted grinding (ILAG) synthesis of ZIF-8-based catalysts was proposed and compared with a conventional stepwise synthesis to determine an appropriate method for proton exchange membrane fuel cells (PEMFCs). The performance characteristics of one-pot- and stepwise-synthesis catalysts were measured by various physicochemical and electrochemical characterization methods. In lab-scale production, the material cost of the one-pot-synthesis catalyst was seven times lower than that of the stepwise-synthesis catalyst. The surface structural characteristics of the one-pot- and stepwise-synthesis catalysts were identical, and the two catalysts showed similar onset potentials that were close to that of a Pt/C. However, based on PEMFC tests, the maximum power density of the one-pot-synthesis catalyst was lower than that of the stepwise-synthesis catalyst owing to the smaller micropore area of one-pot-synthesis catalyst. Nonetheless, the difference between maximum power densities was only 9.6% despite the large disparity in the material cost. Thus, the proposed one-pot-synthesis catalyst can be recommended as a promising non-platinum group metal (PGM) catalyst, but further research to improve its micropore area and performance is required. Highlights: A novel one-pot synthesis of ZIF-8-based non-PGM catalysts is proposed and tested. The characteristics of one-pot and stepwise synthesis catalysts are compared. In lab-scale production, the material cost of the one-pot catalyst is 7 times lower. The ORR onset potentials of the two catalysts are identical and close to Pt catalyst. In PEMFC tests, the maximum power density of the one-pot catalyst is lower by 9.6%.