info:eu-repo/semantics/article
Synthesis of nickel entities: From highly stable zerovalent nanoclusters to nanowires. Growth control and catalytic behavior
Fecha
2018-04Registro en:
Peinetti, Ana Sol; Mizrahi, Martin Daniel; Requejo, Felix Gregorio; Buceta, David; Lopez Quintela, Manuel Arturo; et al.; Synthesis of nickel entities: From highly stable zerovalent nanoclusters to nanowires. Growth control and catalytic behavior; Academic Press Inc Elsevier Science; Journal of Colloid and Interface Science; 516; 4-2018; 371-378
0021-9797
CONICET Digital
CONICET
Autor
Peinetti, Ana Sol
Mizrahi, Martin Daniel
Requejo, Felix Gregorio
Buceta, David
Lopez Quintela, Manuel Arturo
González, Graciela Alicia
Battaglini, Fernando
Resumen
Non-noble metal nanoclusters synthesis is receiving increased attention due to their unique catalytic properties and lower cost. Herein, the synthesis of ligand-free Ni nanoclusters with an average diameter of 0.7 nm corresponding to a structure of 13 atoms is presented; they exhibit a zero-valence state and a high stability toward oxidation and thermal treatment. The nanoclusters formation method consists in the electroreduction of nickel ions inside an ordered mesoporous alumina; also, by increasing the current density, other structures can be obtained reaching to nanowires of 10 nm diameter. A seed-mediated mechanism is proposed to explain the growth to nanowires inside these mesoporous cavities. The size dependence on the catalytic behavior of these entities is illustrated by studying the reduction of methylene blue where the nanoclusters show an outstanding performance.