The concentrations of Fe(NO3)3·9H2O aqueous solution in the above preparation procedure were adjusted to 0.01, 0.1, 1, and 2 mol/L, respectively, and a series of different Fe/Cu ratios of CuxO-FeyOz were synthesized. The Fe/Cu molar ratios of the five catalysts prepared at different ...
In addition, Au-Cu/CeO2 shows peaks characteristic of Cu2+ → Cu+ (γ centred at 437 K) and Cu+ → Cu0 (δ at 443 K) indicative of stepwise Cu reduction [44,45], where hydrogen consumption is consistent with a Cu+:Cu0 molar ratio = 3:1. The presence of cationic copper ...