Bi-Co3O4 catalyzing N2O decomposition with strong resistance to CO2

Strong Structural Modification of Gd to Co3O4for Catalyzing N2O Decomposition under Simulated Real Tail Gases

“…Subsequently, the adsorbed oxygen species (Co–O) can recombine with another adsorbed oxygen species or react with one N 2 O molecule to regenerate the active sites (Co-*) by the Langmuir–Hinshelwood (2) or Eley-Rideal (3) mechanism step, respectively. The regeneration of active sites was confirmed as the rate-determining step for N 2 O decomposition by researchers. , Hence, in order to improve the Co 3 O 4 -based catalyst performance, researchers mainly focused on the following two aspects: (1) increasing the number of active sites (surface oxygen vacancies); and (2) promoting the regeneration of active sites by weakening the Co–O bond.…”

Bulk, Surface and Interface Promotion of Co3O4 for the Low-Temperature N2O Decomposition Catalysis

“…Whereas substitution of the tetrahedral cobalt cations (e.g., by Mg) has rather a small effect of the catalytic activity, replacement of the octahedral ones (e.g., by Al) leads to a dramatic loss of spinel catalyst performance [39]. The cerium, lead and bismuth oxides used as spinel admixtures can be classified as heterojunction promoters constituting separate phases where the interface between the oxides plays a crucial role in the catalytic mechanism of deN2O reaction [21,22,56,57]. As reported by Grzybek et al, the catalytic activity of Co3O4|CeO2 is controlled by the length of the periphery between these two phases [48].…”

“…A literature survey and our previous studies indicate that the structure of the cobalt spinel active phase can be doped with various metal cations [14][15][16][17][18]. Among them, the most promising effect for the deN 2 O reaction has been reported for Zn, Ni, Pb and Bi addition [19][20][21][22]. The surface promotion through the decoration of cobalt spinel with s-block [22,23] and rare earth [24][25][26][27] elements has also been proved to be particularly beneficial for nitrous oxide decomposition reaction.…”

“…Among them, the most promising effect for the deN 2 O reaction has been reported for Zn, Ni, Pb and Bi addition [19][20][21][22]. The surface promotion through the decoration of cobalt spinel with s-block [22,23] and rare earth [24][25][26][27] elements has also been proved to be particularly beneficial for nitrous oxide decomposition reaction. It should be emphasized, however, that only a precisely optimized amount of a specific dopant ensures a substantial promotional effect and the resultant enhancement of the cobalt spinel performance [28].…”

Two-dimensional Polycrystalline Co3O4 Supported High-Number-Density Metal Single Atoms and Clusters

“…In this work, we developed 2D Co3O4 supported Bi SACs and Ir single atom and cluster catalysts. Cobalt hydroxides and oxides supported Ir catalysts demonstrated highly efficient catalytic performance for oxygen evolution reaction [4] and Co3O4 supported Bi catalysts exhibited strong resistance to CO2 for N2O decomposition reaction [5]. Based on our previous work on the synthesis of ultrathin polycrystalline 2D Co3O4 nanosheets [6] we further developed synthesis protocols of dispersing high-number-density Bi single atoms and Ir single atoms and subnanometer clusters onto ultrathin polycrystalline 2D Co3O4 nanosheets.…”