Controllable synthesis 3D hierarchical structured MnO2@NiCo2O4 and its morphology-dependent activity. Issue 2 (11th December 2017)

• Record Type: Journal Article
• Authors: Sun, Ming; Zhang, Bentian; Cheng, Gao; Yu, Huijuan; Ye, Fei; Zhou, Junli; Yu, Lin; Song, Wei
• Is Part Of: Inorganic chemistry frontiers. Volume 5:Issue 2(2018)
• Page Start: 319
• Page End: 326
• Publication Date: 2017-12-11
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c7qi00637c
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : The α-MnO2 @NiCo2 O4 hierarchical structure with the nanowire- and nanosheet-like morphology was controlled synthesized under different solvents and alkalis. The α-MnO2 @NiCo2 O4 heterogeneous structure exhibits a remarkably enhanced activity in the DME combustion reaction. Abstract : The hierarchical structures with controlled size, shape, and interface are extremely attractive for their collective properties and synergetic effect. Herein, we report the α-MnO2 @NiCo2 O4 heterostructures with the nanowire and nanosheet morphology prepared via hydrothermal reaction and a post-calcination treatment. The ultralong α-MnO2 was used as a seed for the Ni–Co precipitant growth and self-assembly. The morphology of the Ni–Co precipitant was tailored using a solvent (water/methanol). After calcination, the shape of the precursor was maintained by α-MnO2 @NiCo2 O4 . α-MnO2 @NiCo2 O4 demonstrates a morphology-dependent performance towards the catalytic combustion of dimethyl ether and the nanosheet-like α-MnO2 @NiCo2 O4 exhibits a better performance than that of the nanowire-like counterpart. The catalytic activity is related to the reducibility, surface oxygen species, and the apparent activation energy.