TY  - JOUR
AU  - Nan, Jue
AU  - Ye, Beirong
AU  - He, Xun
AU  - Li, Chen
AU  - Zhang, Wanli
AU  - Liu, Qian
AU  - Li, Luming
AU  - Chu, Wei
AU  - Sun, Xuping
AU  - Zhang, Yongqi
PY  - 2024
TI  - Enhancing alkaline water oxidation with NiFe alloy-encapsulated nitrogen-doped vertical graphene array
JO  - Nano Research
SN  - 1998-0124
SP  - 4790
EP  - 4796
VL  - 17
IS  - 6
AB  - Advancing efficient and affordable electrocatalysts to boost the oxygen evolution reaction (OER) is pivotal for sustainable green hydrogen production. Herein, we propose the fabrication of nickel-iron alloy nanoparticles-encapsulated on N-doped vertically aligned graphene array on carbon cloth (NiFe@NVG/CC) as a highly active three-dimensional (3D) catalyst electrode for OER. In 1 M KOH, such NiFe@NVG/CC demonstrates outstanding catalytic performance, necessitating merely overpotential of 245 mV for achieving a current density of 10 mA·cm−2, a remarkably low Tafel slope of 36.2 mV·dec−1. Furthermore, density functional theory calculations validate that the incorporate of N species into graphene can reinforce the electrocatalytic activity though reducing the reaction energy barrier during the conversion of *O to *OOH intermediates. The outstanding performance and structural benefits of NiFe@NVG/CC offer valuable insights for the development of innovative and efficient electrocatalysts for water oxidation.
UR  - https://doi.org/10.1007/s12274-024-6431-x
DO  - 10.1007/s12274-024-6431-x