Abstract
A hexagonal perovskite BaNiO3 with unusually high-valence nickel(iv) was synthesized under atmospheric and low-temperature conditions by an ethylenediamine-derived wet-chemical route. Secondary phases disappeared with increase in the pH value, and the single-phase BaNiO3 was successfully synthesized at pH 10. The specific surface area was ∼32 m2 g-1, which is significantly enhanced compared to the BaNiO3 (0.3 m2 g-1) synthesized by flux-mediated crystal growth. The BaNiO3 was used as an oxygen-evolution reaction (OER) catalyst, and the specific mass activity was ∼5 times higher than that of the BaNiO3 synthesized by flux-mediated crystal growth. As a result, the ethylenediamine-derived sol-gel synthesis could be a simple technique to prepare crystalline compounds such as perovskites and spinels, with unusually high-valence transition metals.
| Original language | English |
|---|---|
| Pages (from-to) | 10731-10734 |
| Number of pages | 4 |
| Journal | Chemical Communications |
| Volume | 52 |
| Issue number | 71 |
| DOIs | |
| Publication status | Published - 2016 |
Bibliographical note
Publisher Copyright:© 2016 The Royal Society of Chemistry.
All Science Journal Classification (ASJC) codes
- Catalysis
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Chemistry(all)
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry