RESEARCH / A0495
Optimized Surface Strain in L10-Type Pt0.8Ga0.2Co Intermetallic Catalyst for Enhanced Oxygen Reduction in Fuel Cells
Read the original paper · 10.1021/acs.chemmater.4c01968 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Figure 5. Enhancement mechanism of ORR kinetics. (a) Pt L3 XANES spectra of Pt0.8Ga0.2Co/C, PtCo/C, and Pt foil. (b) Pt L3 k2-weighted FT- EXAFS spectra of Pt0.8Ga0.2Co/C, PtCo/C, and Pt foil. (c, d) Distance between surface Pt atoms of the optimized PtCo/Pt (c) and Pt0.8Ga0.2Co/Pt (d). (e) PDOS of the optimized PtCo/Pt and Pt0.8Ga0.2Co/Pt surface. (f) Free energy diagram of ORR elementary steps on Pt0.8Ga0.2Co/Pt and PtCo/Pt surface.