PGM-free metal oxide nanoarray forests for water-promoted low-temperature soot oxidation

Zhu, Chunxiang; Du, Shoucheng; Wang, Sibo; Lu, Xingxu; Zhang, Mingwan; Zhang, Bo; Liu, Fangyuan; Xiao, Wen; Guo, Yanbing; Ding, Jun; Zhang, Zhaoliang; Gao, Pu-Xian

doi:10.1016/j.apcatb.2023.123336

Cited by 5 publications

(1 citation statement)

References 53 publications

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“…However, it is important to consider that the temperature required for processing soot in a typical diesel vehicle exceeds 600 °C. Consequently, conventional carbon soot combustion catalysts, including noble metals, [125] Ce-based oxides, [123,126] and perovskitetype oxides, [127][128][129][130] are prone to sintering during hydrothermal aging. This sintering phenomenon leads to a significant decline in catalytic activity, greatly impairing their effectiveness in soot removal.…”

Section: Sootmentioning

confidence: 99%

Mn‐Based Mullites for Environmental and Energy Applications

Li,

Wang,

et al. 2024

Advanced Materials

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Mn‐based mullite oxides AMn2O5 (A = lanthanide, Y, Bi) is a novel type of ternary catalyst in terms of their electronic and geometric structures. The coexistence of pyramid Mn3+–O and octahedral Mn4+–O makes the d‐orbital selectively active toward various catalytic reactions. The alternative edge‐ and corner‐sharing stacking configuration constructs the confined active sites and abundant active oxygen species. As a result, they tend to show superior catalytic behaviors and thus gain great attention in environmental treatment and energy conversion and storage. In environmental applications, Mn‐based mullites have been demonstrated to be highly active toward low‐temperature oxidization of CO, NO, volatile organic compounds (VOCs), etc. Recent research further shows that mullites decompose O3 and ozonize VOCs from −20 °C to room temperature. Moreover, mullites enhance oxygen reduction reactions (ORR) and sulfur reduction reactions (SRR), critical kinetic steps in air‐battery and Li–S batteries, respectively. Their distinctive structures also facilitate applications in gas‐sensitive sensing, ionic conduction, high mobility dielectrics, oxygen storage, piezoelectricity, dehydration, H2O2 decomposition, and beyond. A comprehensive review from basic physicochemical properties to application certainly not only gains a full picture of mullite oxides but also provides new insights into designing heterogeneous catalysts.

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