Back to Search
Start Over
Iron-doping-induced formation of Ni–Co–O nanotubes as efficient bifunctional electrodes.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 2/7/2024, Vol. 56 Issue 5, p2018-2028, 11p
- Publication Year :
- 2024
-
Abstract
- The rational design of earth-abundant and efficient electrocatalysts to replace precious metal-based materials is highly anticipated for overall water splitting. Herein, NiCo<subscript>2</subscript>O<subscript>4</subscript> electrocatalysts with different Fe doping amounts (Fe<subscript>x</subscript>-NCO, x = 1, 2, 3) were synthesized by a low-temperature chemical method. It was interesting to find that the doping of Fe induced the formation of NiCo<subscript>2</subscript>O<subscript>4</subscript> nanotube arrays by modulating the Fe content. The Fe<subscript>3</subscript>-NCO electrode with a nanotube structure and rich oxygen vacancies exhibited exceptional electrocatalytic activities for the hydrogen evolution reaction (97 mV, 10 mA cm<superscript>−2</superscript>) and oxygen evolution reaction (188.4 mV, 10 mA cm<superscript>−2</superscript>). DFT calculations revealed that Fe promoted the modulation of the electronic structure, which played a crucial role in optimizing the reaction intermediates and altered the energy level of the d band center, and as a result, enhanced the water dissociation ability. Additionally, a low cell voltage of 1.56 V (10 mA cm<superscript>−2</superscript>) was realized for water splitting based on an as-fabricated Fe-doped NiCo<subscript>2</subscript>O<subscript>4</subscript> nanotube array bifunctional electrode. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 56
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 175068241
- Full Text :
- https://doi.org/10.1039/d3dt03291d