TY  - JOUR
AB  - © 2018 Elsevier B.V. In establishing the kinetics, energetics and mechanisms of phenolic degradation reactivity, active reactive oxygen species (ROS) on catalysts surface could exert a vital part. This paper attempts to account for different ROS at the atomic level using octahedral layered birnessite-type MnO 2 as a platform with different crystal planes which could induce the Jahn-Teller effect and further realize deep mineralization of phenolic pollutants at low temperature. The catalytic degradation phenol rate of (100) MnO 2 is 3 times as much as that of (001) MnO 2 , and the activation energy of the catalytic reaction is reduced by 11 KJ/mol. The degradation content of (100) MnO 2 surpasses 30% than that of (001) MnO 2 . Both spin-trapping EPR and DFT results show superoxide ([rad]O 2? ) species could exist on (001) MnO 2 through one electron transfer, while the peroxide (O 22? ) species exist on (100) MnO 2 via two electrons transfer. All the results illustrate that birnessite MnO 2 possesses surface-dependent molecular oxygen activation properties.
AU  - Yang, W
AU  - Zhu, Y
AU  - You, F
AU  - Yan, L
AU  - Ma, Y
AU  - Lu, C
AU  - Gao, P
AU  - Hao, Q
AU  - Li, W
DA  - 2018/10/05
DO  - 10.1016/j.apcatb.2018.03.107
EP  - 193
JO  - Applied Catalysis B: Environmental
PY  - 2018/10/05
SP  - 184
TI  - Insights into the surface-defect dependence of molecular oxygen activation over birnessite-type MnO <inf>2</inf>
VL  - 233
Y1  - 2018/10/05
Y2  - 2026/05/10
ER  -