Strong metal–support interactions between atomically dispersed Ru and CrO_x for improved durability of chlorobenzene oxidation

Abstract

The preparation of Ru-based single atom catalysts with SMSI effect.

Promotion of Low-Temperature Catalytic Activity of Ru-Based Catalysts for Ammonia Decomposition via Lanthanum and Cesium Codoping

“…The three types of oxygen in the O 1s plot (Figure 8d) were derived from the lattice oxygen (O α , 530.3 eV), oxide defects, and surface oxygen ions with the low coordination (O β , 531.5 eV) and surface carbonate or hydroxyl species (532.8 eV). 51,89,90 High content of oxide defects and surface oxygen was detected in the RL catalyst, which was possibly due to the presence of La 2 O 3 •La 2 O 2 CO 3 species and was consistent with the analysis of NH 3 -TPD. The peak of Al 2p (Figure S6) at 74.5 and 75.6 eV was assigned to γ-Al 2 O 3 and Al(OH) 3 , respectively.…”

“…The Cs species existed in the catalysts could be in the form of CsO x and Cs 2 CO 3 , , and the peaks of Cs species were shifted to higher binding energies after the addition of La, indicating that the Cs species provide electrons. , The peak position of La species after the addition of Cs in Figure b was shifted toward the lower binding energy, indicating that the addition of Cs made the negative charged La atoms of La species on the sample surface increase, and this means that the electron-supplying behavior of Cs would allow La to provide fewer electrons and lower its binding energy, which is in line with the results in Figure c. The three types of oxygen in the O 1s plot (Figure d) were derived from the lattice oxygen (O α , 530.3 eV), oxide defects, and surface oxygen ions with the low coordination (O β , 531.5 eV) and surface carbonate or hydroxyl species (532.8 eV). ,, High content of oxide defects and surface oxygen was detected in the RL catalyst, which was possibly due to the presence of La 2 O 3 ·La 2 O 2 CO 3 species and was consistent with the analysis of NH 3 -TPD. The peak of Al 2p (Figure S6) at 74.5 and 75.6 eV was assigned to γ-Al 2 O 3 and Al(OH) 3 , respectively .…”