Amorphous Ni59Nb40PtxM1−x (M=Ru,Sn) electrocatalysts for oxygen reduction reaction

Preparation of PtSn/C electrocatalysts with improved activity and durability toward oxygen reduction reaction by alcohol-reduction process

“…Comparing with the other three catalysts, it shows that the SnO 2 phase on PtSn can enhance the O 2 pre-oxidation on the surface of Pt [10]. Furthermore, the cathodic peak at 0.7 V is the stripping process of surface oxide of Pt, and is attributed to the proton previously adsorbed and reduced at this electrode potential [10]. Comparing with the commercial Pt/C, the PtSn12 shows a better capability of anion adsorption.…”

“…The best ORR activity of PtSn12 may be attributed to their high dispersion and the anchoring effect [30]. The SnO 2 can promote the adsorption and dissociation of O 2 on the catalyst surface and enhance the catalytic activity in acid environment [10]. Fig.…”

Ultrafine amorphous Co–W–B alloy as the anode catalyst for a direct borohydride fuel cell

“…The excellent performance of CoeWeB-catalyzed DBFC might be attributed to the amorphous structure of the CoeWeB alloy, as it owns more structural distortions and can create more active sites. The amorphous catalysts exhibit lower polarization and better performance than the crystalline ones [19,20], and may play an important role in the cell performance improvement [21]. …”

Carbon nanotubes supported Fe-based compounds as the electrode catalyst for oxygen reduction reaction

“…According to the results as shown above, it can be concluded that the amorphous FeOOH catalyst has higher electrocatalytic activity toward the ORR than the crystalline FeOOH catalyst. It is considered that the amorphous structure may play an important role in the cell performance improvement, as Ramos-Sánchez suggested [22].…”

“…Macrocyclic compounds such as metallic porphyrins [19], phthalocyanines [20] and their modified catalysts [5][6][7][16][17][18]21] demonstrated good electrocatalytic activities toward the ORR. Ramos-Sánchez et al [22] studied the electrocatalytic activity of amorphous Ni 59 Nb 40 Pt x M 1−x (M = Ru, Sn) toward the ORR. It was found that the amorphous catalysts showed the high activity toward the ORR via a 4e transfer pathway.…”