Mesoporous amorphous non-noble metals as versatile substrates for high loading and uniform dispersion of Pt-group single atoms.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38905333.
- Also identified by DOI 10.1126/sciadv.ado2442 and PMC identifier 11192073.
- Licence recorded as CC BY-NC.
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Abstract
Atomically dispersed Pt-group metals are promising as nanocatalysts because of their unique geometric structures and ultrahigh atomic utilization. However, loading isolated Pt-group metals in single-atom alloys (SAAs) with distinctive bimetallic sites is challenging. In this study, we present amorphous mesoporous Ni boride (Ni-B) as an ideal substrate to uniformly disperse Pt atoms with tunable loadings (1.7 to 12.2 wt %). The effect of the morphology, composition, and crystal phase of the Ni-B host on the growth and dispersion of Pt atoms is discussed. The resulting amorphous Pt-Ni-B mesoporous nanospheres exhibit superior electrocatalytic H<sub>2</sub> evolution performance in acidic media. This strategy holds the potential to synthesize a diverse library of mesoporous amorphous Pt-group SAAs, by leveraging functional amorphous nanostructured 3<i>d</i> transition-metal borides as substrates, thereby proposing a comprehensive strategy to control atomically dispersed Pt-group metals.