反应前后Co2+、Co3+的相对含量几乎没有变化，仅从图5c和图5f中

There is almost no change in the relative content of Co2+ and Co3+ before and after the reaction. Only from Fig. 5c and Fig. 5f it is found that the content of adsorbed oxygen relative to the lattice oxygen after the reaction increases slightly. This shows that the catalyst is chemically stable so it has not changed significantly.

There was little change in the relative content of Co2 plus and Co3 plus before and after the reaction, and only a slight increase in the amount of reactive adsorption oxygen relative to lattice oxygen was found in Figures 5c and 5f. This indicates that the catalyst is chemically stable and therefore has not changed significantly.

The relative content of CO2 + and CO3 + before and after the reaction has almost no change. Only from Fig. 5C and Fig. 5F, it is found that the content of adsorbed oxygen increases slightly relative to lattice oxygen after the reaction. This indicates that the catalyst is chemically stable, so there is no obvious change.<br>