Fig. 4: Catalytic mechanism of the 0.75Pt0.2Fe catalyst.
From: Fully-exposed Pt-Fe cluster for efficient preferential oxidation of CO towards hydrogen purification
a The correlation between Fe loading of PtFe/ND@G catalysts and catalytic performance for PROX reaction at 30 °C. b Apparent activation energies of various PtFe/ND@G catalysts with different Fe loading in PROX reaction. c In situ DRIFTS study of CO adsorption during He purging and d co-adsorption CO and O2 on 0.75Pt0.2Fe/ND@G catalyst. XPS spectra of 0.75Pt0.2Fe/ND@G catalyst after in situ reduction at 400 °C and followed by the introduction of reactant gases (1% CO, 0.5% O2 and 48% H2 balanced with He at 30 °C for Pt 4 f (e) and Fe 2p (f)).
