Simple and high-yield preparation of carbon-black-supported â¼1 nm platinum nanoclusters and their oxygen reduction reactivity.
Nanoscale
; 13(35): 14679-14687, 2021 Sep 17.
Article
in En
| MEDLINE
| ID: mdl-34558590
ABSTRACT
The improvement of oxygen reduction reaction (ORR) catalysts is essential before polymer electrolyte fuel cells can be used widely. To this end, we established a simple method for the size-selective synthesis of a series of ligand-protected platinum nanoclusters with â¼1 nm particle size (Ptn NCs; n = â¼35, â¼51, and â¼66) and narrow size distribution (±â¼4 Pt atoms) under atmospheric conditions. Using this method, each ligand-protected â¼1 nm Pt NC was obtained in a relatively high yield (nearly 80% for Ptâ¼66). We succeeded in adsorbing each ligand-protected â¼1 nm Pt NC on carbon black (CB) and then removing most of the ligands from the surface of the Pt NCs via calcination while maintaining the original size. The obtained Ptâ¼35/CB, Ptâ¼51/CB, and Ptâ¼66/CB exhibited ORR mass activities that were 1.6, 2.1, and 1.6 times higher, respectively, than that of commercial CB supported-Pt nanoparticles, and also display high durability.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Nanoscale
Year:
2021
Document type:
Article
Affiliation country:
Japón