Catalytic Properties of Pd Modified Cu/SAPO-34 for NO_𝑥 Removal from Diesel Engine

Figure 3

SEM images of Cu/SAPO-34 catalysts with different Cu contents ((a): Cu/Si = 0, (b): Cu/Si: = 0.025, (c): Cu/Si = 0.05, (d): Cu/Si = 0.1, (e): Cu/Si = 0.2, and (f): Cu/Si = 0.4).

(a)

(b)

(c)

(d)

(e)

(f)