Interconnected surface-vacancy-rich PtFe nanowires for efficient oxygen reduction

Abstract

Catalysts that boost oxygen reduction reaction (ORR) are highly needed for fuel cells and metal-air batteries. Herein, we report the preparation of surface-vacancy-rich PtFe interconnected nanowires as an excellent ORR...

p–d Orbital Hybridization Induced by a Monodispersed Ga Site on a Pt3Mn Nanocatalyst Boosts Ethanol Electrooxidation

“…The electronic interactions of monodispersed Ga site and Pt 3 Mn were further assessed by theoretical modelling. As shown in Figure 2f, unlike other Pt‐based alloy nanomaterials (Pt−Ni, [16] Pt−Co, [17] Pt−Fe, [18] et al. ), it is noted that the band energy of the Pt 5d‐orbital matches well with the Ga 3p‐orbital and O 2p‐orbital, resulting in an unconventional p–d orbital hybridization given the unfilled p‐orbital of Ga from the plot of the projected d‐density of states (PDOS).…”

p–d Orbital Hybridization Induced by a Monodispersed Ga Site on a Pt3Mn Nanocatalyst Boosts Ethanol Electrooxidation

“…[15] The electronic interactions of monodispersed Ga site and Pt 3 Mn were further assessed by theoretical modelling. As shown in Figure 2f, unlike other Pt-based alloy nanomaterials (PtÀ Ni, [16] PtÀ Co, [17] PtÀ Fe, [18] Simultaneously, the electron localization function analysis (Figure 2h) revealed the delocalization level of electron interface after introducing monodispersed Ga site. The dband center theory describes a linear work function relationship between the catalytic activity and metal d-band center, [8b, 19] where the upshifted d-band center from the Fermi level can strengthen the adsorption of ethanol molecules.…”

Atomically ordered Pt3Mn intermetallic electrocatalysts for the oxygen reduction reaction in fuel cells

“…To reduce Pt usage, Pt-M alloys (M: Fe, [11][12][13] Ni, [14][15][16][17][18][19] Co, [20][21][22][23] Cu, [24][25][26][27] etc.) that are random mixtures of Pt and M atoms have been extensively explored.…”