We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Direct methane protonic ceramic fuel cells with self-assembled Ni-Rh bimetallic catalyst.
- Authors
Hong, Kyungpyo; Choi, Mingi; Bae, Yonggyun; Min, Jihong; Lee, Jaeyeob; Kim, Donguk; Bang, Sehee; Lee, Han-Koo; Lee, Wonyoung; Hong, Jongsup
- Abstract
Direct methane protonic ceramic fuel cells are promising electrochemical devices that address the technical and economic challenges of conventional ceramic fuel cells. However, Ni, a catalyst of protonic ceramic fuel cells exhibits sluggish reaction kinetics for CH4 conversion and a low tolerance against carbon-coking, limiting its wider applications. Herein, we introduce a self-assembled Ni-Rh bimetallic catalyst that exhibits a significantly high CH4 conversion and carbon-coking tolerance. It enables direct methane protonic ceramic fuel cells to operate with a high maximum power density of ~0.50 W·cm−2 at 500 °C, surpassing all other previously reported values from direct methane protonic ceramic fuel cells and even solid oxide fuel cells. Moreover, it allows stable operation with a degradation rate of 0.02%·h−1 at 500 °C over 500 h, which is ~20-fold lower than that of conventional protonic ceramic fuel cells (0.4%·h−1). High-resolution in-situ surface characterization techniques reveal that high-water interaction on the Ni-Rh surface facilitates the carbon cleaning process, enabling sustainable long-term operation. Direct methane protonic ceramic fuel cells are promising electrochemical energy conversion devices. However, their performance and stability remain challenging. Here, the authors develop a self-assembled Ni-Rh bimetallic catalyst which shows great enhancements in power output and long-term operational sustainability.
- Subjects
BIMETALLIC catalysts; SOLID oxide fuel cells; FUEL cells; SURFACE analysis; METHANE
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-43388-8