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Updated: Feb 15, 2026

Controlled Photoredox Ring-Opening Polymerization of O-Carboxyanhydrides Mediated by Ni/Zn Complexes
Published on: November 21, 2017
Precisely controlled synthesis of α-/β-MnO2 materials by adding Zn(acac)2 as a phase transformation-inducing agent
Ningqiang Zhang1, Lingcong Li, Jinsheng Zhao
1Key Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China. hehong@bjut.edu.cn sunsr@bjut.edu.cn.
Abstract:
In this paper, we present an approach for the precisely controlled phase transformation of MnO2 in order to synthesise different compositions of α-/β-MnO2 materials, by adding a trace amount of Zn(acac)2 as the phase transformation-inducing agent in a hydrothermal reaction. The single-atomic dispersion of Zn might reduce the barrier of phase transformation of δ-MnO2 to β-MnO2. The ratio of the Zn species present in the single-atomic dispersions and nanoclusters might dominate the generation of α-MnO2 and β-MnO2. The results of the oxygen reduction reactions indicate that the MnO2 materials have potential applications as promising catalysts in electrochemical catalysis.
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