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One-pot production of a sea urchin-like alloy electrocatalyst for the oxygen electro-reduction reaction.
- Source :
-
Dalton transactions (Cambridge, England : 2003) [Dalton Trans] 2022 Aug 02; Vol. 51 (30), pp. 11427-11436. Date of Electronic Publication: 2022 Aug 02. - Publication Year :
- 2022
-
Abstract
- Designing a cost-effective catalyst with high performance towards the oxygen electro-oxidation reaction (ORR) is of great interest for the development of green energy storage and conversion technologies. We report herein a facile self-assembly strategy in a mild reducing environment to realize an urchin-like NiPt bimetallic alloy with the domination of the (111) facets as an efficient ORR electrocatalyst. In the rotating-disk electrode test, the as-obtained NiPt nanourchins (NUCs)/C catalyst demonstrates an increase in both onset potential (0.96 V <subscript>RHE</subscript> ) and half-wave potential (0.92 V <subscript>RHE</subscript> ) and a direct four-electron ORR pathway with enhanced reaction kinetics. Additionally, the as-made NiPt NUCs/C electrocatalyst also shows impressive ORR catalytic stability compared to a commercial Pt NPs/C catalyst after an accelerated durability test with 15.29% degradation in mass activity, which is 3.04-times lower than 46.48% of the Pt NPs/C catalyst. The great ORR performance of the as-made catalyst is due to its unique urchin-like morphology with the dominant (111) facets and the synergistic and electronic effects of alloying Ni and Pt. This study not only provides a robust ORR electrocatalyst, but also opens a facile but effective route for fabricating 3D Pt-based binary and ternary alloy catalysts.
Details
- Language :
- English
- ISSN :
- 1477-9234
- Volume :
- 51
- Issue :
- 30
- Database :
- MEDLINE
- Journal :
- Dalton transactions (Cambridge, England : 2003)
- Publication Type :
- Academic Journal
- Accession number :
- 35822501
- Full Text :
- https://doi.org/10.1039/d2dt01268e