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A completely precious metal-free alkaline fuel cell with enhanced performance using a carbon-coated nickel anode.
- Source :
-
Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2022 Mar 29; Vol. 119 (13), pp. e2119883119. Date of Electronic Publication: 2022 Mar 21. - Publication Year :
- 2022
-
Abstract
- SignificanceWe present a groundbreaking advance in completely nonprecious hydrogen fuel cell technologies achieving a record power density of 200 mW/cm <superscript>2</superscript> with Ni@CN <subscript>x</subscript> anode and Co-Mn cathode. The 2-nm CN <subscript>x</subscript> coating weakens the O-binding energy, which effectively mitigates the undesirable surface oxidation during hydrogen oxidation reaction (HOR) polarization, leading to a stable fuel cell operation for Ni@CN <subscript>x</subscript> over 100 h at 200 mA/cm <superscript>2</superscript> , superior to a Ni nanoparticle counterpart. Ni@CNx exhibited a dramatically enhanced tolerance to CO relative to Pt/C, enabling the use of hydrogen gas with trace amounts of CO, critical for practical applications. The complete removal of precious metals in fuel cells lowers the catalyst cost to virtually negligible levels and marks a milestone for practical alkaline fuel cells.
Details
- Language :
- English
- ISSN :
- 1091-6490
- Volume :
- 119
- Issue :
- 13
- Database :
- MEDLINE
- Journal :
- Proceedings of the National Academy of Sciences of the United States of America
- Publication Type :
- Academic Journal
- Accession number :
- 35312369
- Full Text :
- https://doi.org/10.1073/pnas.2119883119