Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

Abstract

Thermal catalytic oxidation is a promising and effective technique for the removal of harmful formaldehyde (HCHO) in indoor air. Manganese oxide is a mostly‐investigated non‐noble metal oxide catalyst and attracts much attention due to its better catalytic performance for formaldehyde oxidation at low temperature. In this review, the effect of manganese oxide crystal structure, surface morphology and microstructure, surface active oxygen species, reducibility as well as catalytic reaction conditions (temperature, relative humidity and HCHO initial concentration) on catalytic performance, and the catalytic mechanism over manganese oxide were summarized and discussed. The challenges and prospects for future development of manganese oxide in catalytic oxidation of formaldehyde are also covered.

How Chemoresistive Sensors Can Learn from Heterogeneous Catalysis. Hints, Issues, and Perspectives

“…Interestingly, the compiled T 100 (the temperature for achieving total conversion) values did not surpass 200 • C, which is a very useful feature for low power consumption sensors. Similar observations can be drawn from a more recent review [40]. β-MnO 2 was found by Li et al [41] as the most active phase toward CO oxidation with a T 90 of 109 • C. In the case of Mn oxides, the relationship with sensing applications is not very well defined, very few sensing papers having been published.…”

Dynamic Structural Evolution of Mn–Au Alloy and MnOx Nanostructures on Au(111) under Different Atmospheres

“…1−3 From a chemical point of view, MnO x has been widely applied in environmental waste treatment, 1,4−8 water oxidation in artificial photosynthesis, 9−12 batteries, 13,14 and supercapacitors, 15−17 to just name a few. As a catalyst, the catalytic performance and reaction mechanism of the MnO x material vary with its valence state 1,4 and Mn−O bond strength. 1,3 Furthermore, different surface facets and morphologies of MnO x nanostructures often lead to diverse catalytic performance.…”

“…As a catalyst, the catalytic performance and reaction mechanism of the MnO x material vary with its valence state 1,4 and Mn−O bond strength. 1,3 Furthermore, different surface facets and morphologies of MnO x nanostructures often lead to diverse catalytic performance. [1][2][3]18 Consequently, the controllable preparation of MnO x material is of great importance for improving their catalytic performance.…”

“…1,3 Furthermore, different surface facets and morphologies of MnO x nanostructures often lead to diverse catalytic performance. [1][2][3]18 Consequently, the controllable preparation of MnO x material is of great importance for improving their catalytic performance.…”

“…Manganese oxide (MnO x ) crystallizes naturally as minerals in more than 30 different structures, such as MnO, Mn 3 O 4 , Mn 2 O 3 , and MnO 2 . These manganese oxides present a number of excellent physical and chemical properties, such as facile oxygen mobility, enhanced oxygen storage capacitance, fast cation diffusion with high charge–discharge rates, environmental friendliness, and low cost. − From a chemical point of view, MnO x has been widely applied in environmental waste treatment, ,− water oxidation in artificial photosynthesis, − batteries, , and supercapacitors, − to just name a few. As a catalyst, the catalytic performance and reaction mechanism of the MnO x material vary with its valence state , and Mn–O bond strength. , Furthermore, different surface facets and morphologies of MnO x nanostructures often lead to diverse catalytic performance. − , Consequently, the controllable preparation of MnO x material is of great importance for improving their catalytic performance.…”