Details

Autor(en) / Beteiligte

• Li, Jiangtian
• Chu, Deryn
• Dong, Hong
• Baker, David R
• Jiang, Rongzhong

Titel

Boosted Oxygen Evolution Reactivity by Igniting Double Exchange Interaction in Spinel Oxides

Ist Teil von

• Journal of the American Chemical Society, 2020-01, Vol.142 (1), p.50-54

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A double-exchange interaction (DEI) was demonstrated to boost the oxygen evolution reaction (OER) in spinel oxides. DEI was ignited by synergistic actions of constructing nanoheterojunctions and creating oxygen vacancy (VO) in spinel NiCo2O4. DEI between octahedrally coordinated Ni and Co resulted in the generation of superior OER active centers Co(3−δ)+ and Ni3+. The multiple synergistic effects empower the electrocatalyst with exceptional OER activity, with an overpotential of 270 ± 3 mV at 10 mA/cm2 and a Tafel slope of 39 mV/dec, both of which are among the best values for NiCo2O4-based nanostructures, and even better than those for IrO2 and RuO2.