Understanding the oxophilic effect on the hydrogen electrode reaction through PtM nanostructures

Carbon-supported PtM nanostructured materials (M = Cr, Co, Ni, Cu, Mo, Y, Sm, Gd) were investigated for the hydrogen evolution/oxidation reactions (HER/HOR) in alkaline medium. All catalysts were synthesized by the carbonyl complex chemical route. Among PtM, Cr, Co, Ni, and Cu formed nanoalloys. M 2...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Journal of solid state electrochemistry 2021-01, Vol.25 (1), p.187-194
Hauptverfasser:	Campos-Roldán, C.A., Alonso-Vante, N.
Format:	Artikel
Sprache:	eng
Schlagworte:	Analytical Chemistry Carbonyls Characterization and Evaluation of Materials Chemical synthesis Chemistry Chemistry and Materials Science Chromium Condensed Matter Physics Copper Electrochemistry Energy Storage Gadolinium Hydrogen evolution Intermetallic compounds Molybdenum Nanoalloys Nanostructured materials Nickel Original Paper Oxidation Physical Chemistry Platinum
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Carbon-supported PtM nanostructured materials (M = Cr, Co, Ni, Cu, Mo, Y, Sm, Gd) were investigated for the hydrogen evolution/oxidation reactions (HER/HOR) in alkaline medium. All catalysts were synthesized by the carbonyl complex chemical route. Among PtM, Cr, Co, Ni, and Cu formed nanoalloys. M 2 O 3 was generated with Y, Sm, and Gd, and Mo was found at a dopant concentration of Pt. The electrochemical results showed that the HER/HOR activities on PtNi/C and PtCo/C outperformed that of the Pt/C benchmark. The presence of OH ads species, acting as a bifunctional mechanism, favored the HER/HOR activity on PtNi/C and PtCo/C. This process is concomitant with early DFT studies that concluded that the presence of OH ads weakens the H ads and H 2 O ads energetics. Graphical abstract
ISSN:	1432-8488 1433-0768
DOI:	10.1007/s10008-020-04719-7