Hierarchical branched α-MnO2: one-step synthesis and catalytic activity. Issue 74 (2nd October 2017)

• Record Type: Journal Article
• Authors: Liu, Hengfa; Zhang, Bentian; Li, Wanping; Cheng, Gao; Han, Jiaxi; Lan, Bang; Sun, Ming; Yu, Lin
• Is Part Of: RSC advances. Volume 7:Issue 74(2017)
• Page Start: 46529
• Page End: 46535
• Publication Date: 2017-10-02
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra08567b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The hierarchical pine tree-like α-MnO2 are controlled synthesized at room temperature without any template. The α-MnO2 displays superior activity in the catalytic combustion of dimethyl ether. Abstract : Hierarchical pine tree-like α-MnO2 architectures are prepared by a facile one-step method without any template. The hierarchical α-MnO2 is composed of branched α-MnO2 short nanorods assembled onto the backbone of an α-MnO2 long nanowire. Time-dependent experiment shows that the growth process of the branched α-MnO2 nanostructures is the formation of β-MnOOH and then the transformation to a α-MnO2 branched structure in a step by step manner. Owing to its specific structure features, the hierarchical pine tree-like α-MnO2 exhibits superior catalytic performance in the catalytic combustion of dimethyl ether with a light-off temperature ( T 10 ) at 169 °C and a complete conversion temperature ( T 90 ) of 235 °C, which is far better than commercial MnO2 .