The relationship between surface open cells of α-MnO₂ and CO oxidation ability from a surface point of view

Abstract

Open cells at the surface of α-MnO2 provide adsorption and oxidative sites for CO oxidation.

Recent progresses in the synthesis of MnO2 nanowire and its application in environmental catalysis

“…[88][89][90] Studies have found that the phase structure can signicantly affect the catalytic activity of MnO 2 , and both a-MnO 2 and d-MnO 2 are the dominant phase structures of MnO 2based catalytic nanomaterials. [91][92][93][94] Specically, a-MnO 2 occupies more space than b-, g-, and d-MnO 2 due to the double tunnel structure of [2 Â 2] and [1 Â 1]. As a result, it obtains more adsorption sites for the reactants (such as CO and VOCs) than other phases.…”

MnO2‐Based Materials for Environmental Applications

“…MnO 2 with various crystal phases (α‐MnO 2 , [ 505 ] β‐MnO 2 , [ 506 ] γ‐MnO 2 , [ 159 ] and ε‐MnO 2 [ 507 ] ) has shown excellent performances for CO oxidation. Among them, α‐MnO 2 has relatively higher catalytic activity for CO oxidation than other crystalline phases, [ 67 ] while δ‐MnO 2 shows a better‐assisted function for the photocatalytic oxidation of CO [ 87 ] (assist layered micro‐mesoporous titanium phosphates to photocatalytic oxidize CO).…”

“…In addition, to enhance the performance of MnO 2 for the catalytic oxidation of CO, much research has been conducted. Effective means to achieve this include doping engineering, [ 158,159,508 ] surface engineering, [ 505 ] and combination with other active substances. [ 221,506,509–511 ] Liu et al.…”

“…For example, in Li et al. 's work, [ 505 ] a large number of surface open cells were formed on the surface of α‐MnO 2 through acid treatment. These surface open cells are conducive to the adsorption of oxygen, thus enhancing the catalytic activity of MnO 2 for CO oxidation.…”

Facile synthesis of a high purity α-MnO2 nanorod for rapid degradation of Rhodamine B

“…Therefore, it is urgent to find a more effective method to achieve the degradation of organic dyes. Some reports have demonstrated that MnO 2 is expected to degrade organic dyes in different surroundings because of its superior catalytic activities and adsorption capabilities [8][9][10][11][12][13][14][15][16][17]. And the polymorphic structure of MnO 2 materials determines their catalytic performance [10][11][12][18][19][20][21]…”