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Surface activation of platinum group metal clusters for efficient and durable oxygen reduction in proton exchange membrane fuel cells
- Source :
- Applied Physics Reviews. 10
- Publication Year :
- 2023
- Publisher :
- AIP Publishing, 2023.
-
Abstract
- To develop efficient and durable acidic oxygen–reduction–reaction (ORR) catalysts based on all platinum group metals (PGMs) is crucial for large-scale application of proton-exchange membrane fuel cells (PEMFCs) but challenging. Here, we report a nitrogen coordination-induced strong metal–support interaction that can tune the surface atoms of ORR-inactive PGM clusters into efficient and durable active sites. Taking Rh as an example, the carbonization of Rh-overdoped zeolitic imidazolate framework-8 results in a large number of Rh clusters (with a little atomic Rh) in porous nitrogen-doped carbon. The cluster surface atoms coordinate with the nitrogen of the carbon support, forming much stronger metal–support interactions than that of common N-doped carbon-supported metal nanoparticles. The activity of surface-activated Rh clusters is close to that of Pt/C. The regulation rules for the surface active sites inherit most of the characteristics of the corresponding single-atom catalysts, but without their severe instability problem. This surface activation strategy has also shown applicable to other PGMs, thereby it is a promising way to alleviate the reliance of PEMFCs on platinum.
- Subjects :
- General Physics and Astronomy
Subjects
Details
- ISSN :
- 19319401
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- Applied Physics Reviews
- Accession number :
- edsair.doi...........5a6b118d86c0ceaaeee8bd59b92106e0