Details

Autor(en) / Beteiligte

• Campos-Roldán, C.A.
• Calvillo, L.
• Granozzi, G.
• Alonso-Vante, N.

Titel

Alkaline hydrogen electrode and oxygen reduction reaction on PtxNi nanoalloys

Ist Teil von

• Journal of electroanalytical chemistry (Lausanne, Switzerland), 2020-01, Vol.857, p.113449, Article 113449

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The electrochemical characterization of chemical carbonyl route generated Pt:Ni nano-alloys, in acid and alkaline media, is reported. Earlier XRD and Debye Function Analysis (DFA) studies (Yang et al., 2004 [1]) provided the structure of these nanoalloys. Herein, the HER/HOR electrocatalytic activity as well as ORR kinetics, in alkaline medium, was determined and correlated with the interatomic PtPt distance. The HER/HOR and ORR exchange current densities describes a Volcano-like plot. For both systems, the maximum activity for both processes peaked with Pt3Ni. •Pt:Ni nanoalloy materials were synthesized by the carbonyl chemical route.•The HER/HOR and ORR processes were investigated in alkaline electrolyte.•The nanoalloy with the optimal electrochemical activity was Pt3Ni.•The oxophilic effect is favored for the HER/HOR in alkaline electrolyte.•The catalytic center's strain effect is found in the nanoalloy itself.