Influence of Hydrogen Pre-treatment at Different Temperatures on Copper Oxide Supported on Carbonised Oil Palm Empty Fruit Bunch (CuO/EFBC) for Low-Temperature Nitric Oxide Removal

Probing the Atomistic Reaction Pathways in CuO/C Catalysts

“…Additionally, the distribution of CuO x species plays a critical role in enhancing catalytic efficiency due to the synergistic catalytic mechanism , of Cu 2 O/CuO in the SCR reaction . Specifically, it was demonstrated that the mixture of CuO (Cu 2+ ) and Cu 2 O (Cu + ) is more favorable for NO reduction, while the mixture of Cu 2 O (Cu + ) and metallic Cu (Cu 0 ) will impede NO reduction in the presence of nitric acid. − C has been demonstrated to be an effective approach to reduce CuO and thus control the Cu valence distribution at high temperatures. Generally, CuO can be reduced into Cu 2 O or Cu under high temperatures. − Furthermore, copper oxides exhibit complex structural dynamics such as particle reshaping, sintering, and splitting under high temperatures or in a redox atmosphere. − It was noted that high catalytic efficiency can be attributed to the appropriate valence distribution of CuO x species through calcination with an appropriate content of C nanotube (CNT) in composite copper oxides, implying that the ratio of CuO and C could also influence the reaction mechanisms.…”