Advanced catalytic support materials featuring polymeric short-side chains for PEM water electrolysis anodes
- Authors
- Kim, Jae-Hun; Lee, Hye Jin; Lee, Soo Youn; Noh, Min Su; Shin, Eun Jeong; Jung, Hwi Jong; Kim, Yuri; Park, Hee-Young; Kim, Hee Soo; Lee, Jiye; Lee, Eunjik; Kan, Eunsung; Jang, Jong Hyun; Kim, Hyoung-Juhn; Woo, Sahng Hyuck
- Issue Date
- 2025-09
- Publisher
- Elsevier BV
- Citation
- Chemical Engineering Journal, v.519
- Abstract
- This study investigates the modification of halloysite nanotubes (HNTs) through sulfonation to enhance their performance as catalytic support materials in proton exchange membrane water electrolyzer (PEMWE) anodes. Sulfonated HNTs (S-HNTs) exhibited improved dispersion and proton transport due to the incorporation of sulfonic acid groups (10.23 x 10-5 mol/g) and reduced particle size. FTIR, XRD, thermal analysis, and TEM confirmed the successful modification, demonstrating enhanced stability and morphology. The MEA incorporating 10 wt% S-HNT01 in the anode achieved a high current density of 3.2 A cm- 2 at 1.8 V, meeting the 2026 US DoE performance target. Additionally, with a reduced IrO2 loading of 0.2 mg cm- 2, the mass activity reached 8.75 A mg-1, significantly improving catalytic efficiency while minimizing precious metal usage. Long-term testing confirmed better durability compared to unmodified HNTs. These findings demonstrate that S-HNT01 enhances the efficiency, durability, and cost-effectiveness of PEMWE, making it a promising candidate for advanced water electrolysis applications.
- Keywords
- PROTON CONDUCTIVITY; MEMBRANE; NANOTUBES; Anode; Catalytic support materials; Halloysite nanotube (HNT); Proton exchange membrane water electrolysis; (PEMWE)
- ISSN
- 1385-8947
- URI
- https://pubs.kist.re.kr/handle/201004/152886
- DOI
- 10.1016/j.cej.2025.164773
- Appears in Collections:
- KIST Article > Others
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