Excellent performances promoted by lattice oxygen have attracted wide attention for catalytic degradation of volatile organic compounds (VOCs). However

how to control the continuous regeneration of lattice oxygen from the support is seldom reported. In this study

we selected sepiolite supported manganese-cobalt oxides (Co

x

Mn

100-

x

O

y

) as model catalysts by tuning Co/(Co + Mn) mass ratio (

x

= 3%

10%

15%

and 20%) to enhance toluene degradation efficiency

owing to lattice oxygen regeneration by redox cycle existing at the interface and Mn species with high valence state

initiated by cobalt catalytic performance under the role of crystal field stability phase. The results of activity test show that the sepiolite-Co

15

Mn

85

O

y

catalyst exhibit outperformances at 193 ℃ with 10

000 h

-1

GHSV. In addition

the catalyst existed at the bottom of the “volcano” curve correlated

T

50

or

T

90

with Co/(Co + Mn) weight ratio is sepiolite-Co

15

Mn

85

O

y

conforming its outperformance. Further characterized by investig

ating active sites structural and electronic properties

the essential of superior catalytic activity is attributed to the grands of lattice oxygen continuous formation resulted from redox engineering based on the high atomic ratio of surface lattice oxygen with continuous refilled from the support and that of Mn

4+

/Mn

3+

cycle initiated by cobalt catalytic behaviors. All in all

redox engineering

not only promotes grands of active species reversible regeneration

but supplies an alternative catalyst design strategy towards the terrific efficiency-to-cost ratio performance.