Thermal decomposition behavior of nickel-iron hydrotalcite and its electrocatalytic properties of oxygen reduction and oxygen evolution reactions.
- Resource Type
- Article
- Authors
- Zhang, Zejie; Zhou, Debi; Bao, Xinjun; Yu, Huazhang; Huang, Boyun
- Source
- International Journal of Hydrogen Energy. Nov2018, Vol. 43 Issue 45, p20734-20738. 5p.
- Subject
- *HYDROTALCITE
*OXYGEN reduction
*OXYGEN evolution reactions
*THERMOGRAVIMETRY
*DIFFERENTIAL scanning calorimetry
- Language
- ISSN
- 0360-3199
Abstract The thermal decomposition behavior of NiFe layered double hydroxide (LDH) was investigated by thermogravimetric analysis-differential scanning calorimetry (TG-DSC). The calcined product at 500 °C was mainly NiO/FeOx composite oxide, of which FeOx was amorphous oxide; the calcined product at 650 °C was mainly NiO/NiFe 2 O 4 composite oxide. The polarization curves and chronopotentiometry stated that the NiO/FeOx and NiO/NiFe 2 O 4 showed good electrocatalytic OER and ORR activity; the OER activity of NiO/FeOx was better than that of NiO/NiFe 2 O 4 ; the ORR activity of NiO/NiFe 2 O 4 was better than that of NiO/FeOx. Highlights • The thermal decomposition behavior of NiFe LDH materials was analyzed. • The calcined product at 500 °C was mainly NiO/FeOx composite oxide. • The calcined product at 650 °C was mainly NiO/NiFe 2 O 4 composite oxide. • The NiO/FeOx (NFL-500) composite oxide had excellent and stable activity for OER. • The NiO/NiFe 2 O 4 (NFL-650) composite oxide had excellent and stable activity for ORR. [ABSTRACT FROM AUTHOR]