Low temperature prepared copper-iron mixed oxides for the selective CO oxidation in the presence of hydrogen

Heterogeneous Cu–Fe oxide catalysts for preferential CO oxidation (PROX) in H2-rich process streams

“…40,53,54 Moreover, under CO PROX process conditions, Cu was found to exist mainly as Cu + . Analogously to CuFe 2 O 4 systems, reported in the literature, 45,50,54,56,59 Cu-Mn composite catalysts, presented in this work (Table 4), have shown a high relative activity for CO oxidation and a strong interaction between the two metal components, believed to be responsible for the said good performance, stability-wise as well.…”

“…Similar to the CuO systems reported in the literature 45,[50][51][52] Cu composite systems presented in this work has shown high activity for CO oxidation, and the strong interaction between the two metal components is believed to be responsible for the high activity. In comparison to the other Cu-Fe based catalysts and Cu based catalysts for PROX reaction, reported in the literature, 15,19,45,47,53,59 CuFe 2 O 4 material exhibited high activity (Table 4). These catalysts showed an enhanced performance when compared to the analogues, consisting of Au and Pt (Table 4).…”

Continuous Hydrogenation of Ethyl Levulinate to 1,4‐Pentanediol over 2.8Cu‐3.5Fe/SBA‐15 Catalyst at Low Loading: The Effect of Fe Doping

“…The curve of 3.5Fe/SBA‐15 showed distinct hydrogen adsorption peaks at 400 and 750 °C, representing the reduction of Fe 3+ species to Fe 0 . The curve of 2.8Cu/SBA‐15 exhibited two overlapping peaks between 265 and 400 °C, related to the continuous reduction of Cu 2+ species to Cu + species and Cu 0 . Three peaks arose on the curve of 2.8Cu‐3.5Fe/SBA‐15; the peaks at 220 and 710 °C represent the reduction of scattered Cu 2+ species and FeO x , respectively.…”

“…Three peaks arose on the curve of 2.8Cu‐3.5Fe/SBA‐15; the peaks at 220 and 710 °C represent the reduction of scattered Cu 2+ species and FeO x , respectively. The broad peak at 460 °C was assigned to the reduction of CuFeO 2 to copper and FeO x . Compared with 3.5Fe/SBA‐15, the intimate metal–metal interaction in 2.8Cu‐3.5Fe/SBA‐15 made the reduced Cu 0 provide spillover H to reduce FeO x at lower temperature.…”

Metal–Organic Framework-Based Sustainable Nanocatalysts for CO Oxidation

“…It was reported that mixed cobalt and copper oxides [35], as well as copper-iron mixed oxides synthesized by low-temperature co-precipitation methods [33,36,37], have synergistic effects on the oxidation of CO; therefore, bimetallic systems were prepared incorporating these metals into UiO-66. The solids obtained by successive impregnation were analyzed, firstly by incorporating the copper precursor followed by their thermal treatment (500 • C, air, 2 h); subsequently, a cobalt or iron precursor was added, followed by a final calcination step in air (400 • C, 2 h) to obtain Cu 16 Co 7 /Zr and Cu 16 Fe 7 /Zr systems.…”