Synthesis of MnO₂–CuO–Fe₂O₃/CNTs catalysts: low-temperature SCR activity and formation mechanism

• Yanbing Zhang,
• Lihua Liu,
• Yingzan Chen,
• Xianglong Cheng,
• Chengjian Song,
• Mingjie Ding and
• Haipeng Zhao

Beilstein J. Nanotechnol. 2019, 10, 848–855, doi:10.3762/bjnano.10.85

• -IWIM fabricated through incipient wetness impregnation, except for the 1% MnO2–CuO–Fe2O3/CNTs, and reached 69.9–87.9% between 140 to 180 °C. The SCR activity over 4% MnO2–CuO–Fe2O3/CNTs reached maximum values of 43.1–87.9% at 80–180 °C at a weight hourly space velocity of 280 L·gcat−1·h−1. X-ray

• , only a weak peak of MnO2 (PDF#53-0633) can be observed when the loading was greater than or equal to 4%, whereas no diffraction peaks of metal oxides could be found, suggesting the formation of amorphous metal oxide phases. Amorphous catalytic materials are conducive to SCR activity [19], which is also

• ) of the Mn–Cu–FeOx/CNTs-IWIM catalyst appear at lower energies than those of 4% MnO2–CuO–Fe2O3/CNTs catalyst, revealing the formation of Fe3O4 [35]. Moreover, the absence of any satellites further proved the presence of Fe3O4. It is noteworthy that Fe2O3 exhibits a better low-temperature SCR activity

A review of carbon-based and non-carbon-based catalyst supports for the selective catalytic reduction of nitric oxide

• Shahreen Binti Izwan Anthonysamy,
• Syahidah Binti Afandi,
• Mehrnoush Khavarian and
• Abdul Rahman Bin Mohamed

Beilstein J. Nanotechnol. 2018, 9, 740–761, doi:10.3762/bjnano.9.68

• ” reaction to improve low-temperature SCR activity. The sol–gel method has been used quite frequently for the development of nano-based catalysts. Basically, certain chemical solutions together with a foaming agent (citric acid) is mixed vigorously by stirring under room temperature to produce a homogeneous

• NH3 at low operating temperatures. Excellent SCR activity was observed since the Mn-FeOx/CNT catalysts possessed high-stability morphology, high chemisorbed oxygen content, as well as strong reducibility at low SCR temperature. Zhang et al. [45] used the co-precipitation method to produce a high

• with the strong interaction between MnOx nanoparticles with the inner and outer CNT surface. Concurrently, the number of oxygen molecules could be supplied when MnOx is introduced onto the CNT surface, promoting high SCR activity. In another work, Zhang et al. [70] compared the catalytic activity of Mn