In Situ Synthesis of Manganese Oxide as an Oxygen-Evolving Catalyst: A New Strategy.
Zahra AbdiRobabeh BagheriMohammad Reza MohammadiZhenlun SongMikaela GörlinHolger DauMohammad Mahdi NajafpourPublished in: Chemistry (Weinheim an der Bergstrasse, Germany) (2020)
All studies on oxygen-evolution reaction by Mn oxides in the presence of cerium(IV) ammonium nitrate (CAN) have been so far carried out by synthesizing Mn oxides in the first step. And then, followed by the investigation of the Mn oxides in the presence of oxidants for oxygen-evolution reaction (OER). This paper presents a case study of a new and promising strategy for in situ catalyst synthesis by the adding MnII to either CAN or KMnO4 /CAN solution, resulting in the formation of Mn-based catalysts for OER. The catalysts were characterized by scanning electron microscopy, energy-dispersive spectroscopy, transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray absorption spectroscopy, and X-ray photoelectron spectroscopy. Both compounds contained nano-sized particles that catalyzed OER in the presence of CAN. The turnover frequencies for both catalysts were 0.02 (mmol O 2 /molMn ⋅s).
Keyphrases
- electron microscopy
- metal organic framework
- room temperature
- transition metal
- ionic liquid
- highly efficient
- high resolution
- single molecule
- solid state
- nitric oxide
- computed tomography
- magnetic resonance imaging
- bone mineral density
- mass spectrometry
- gas chromatography mass spectrometry
- electron transfer
- visible light