Fig. 6: Catalytic mechanism revealed by operando XAS and electrochemical characterization. | Nature Communications

Fig. 6: Catalytic mechanism revealed by operando XAS and electrochemical characterization.

From: Exploring a bimetallic catalyst family for hydrogen oxidation with insights into superior activity and durability

Fig. 6: Catalytic mechanism revealed by operando XAS and electrochemical characterization.

a, b Operando XANES spectra and FT-EXAFS spectra of RuIr atomic layers measured under air, OCP and applied potentials of 0.65 VRHE, 0.90 VRHE, and 1.05 VRHE during alkaline HOR at the Ru K-edge. c, d Operando XANES spectra and FT-EXAFS spectra of RuIr atomic layers measured under air, OCP and applied potentials of 0.65 VRHE, 0.90 VRHE, and 1.05 VRHE during alkaline HOR at the Ir L3-edge. e CV curves of Pd@Ru0.47Ir0.53 core-shell nanocubes, Pd@Ru core-shell nanocubes, Pd@Ir core-shell nanocubes and commercial Pt/C in N2-saturated 0.1 M KOH. f CO stripping curves of Pd@Ru0.47Ir0.53 core-shell nanocubes, Pd@Ru core-shell nanocubes, Pd@Ir core-shell nanocubes and commercial Pt/C. g Adsorption of OH* on Ru, Ir, and RuIr surfaces, shown in both top and cross-sectional views, along with calculated OH* adsorption energies. h Schematic of the alkaline HOR catalytic mechanism. These data are obtained with no iR correction. Source data for this Figure are provided as a Source Data file.

Back to article page