Industrial-scale water electrolysis is still limited because of the evolution process of oxygen requires a strict limit of overpotential (≤300 mV) to realize a current density of 500 mA cm-2. To accelerate sluggish oxygen evolution reaction (OER) process, we fabricated an extremely efficient oxygen-evolving hybrid catalyst by incorporating low-level rhenium content and nitrogen doped carbon cloth with NiFeOH.This hybrid catalyst, associated with a modified electronic structure of NiFeOH under the influence of N-CC and Re, generates a synergistic catalytic effect that can enhance water dissociation and intermediate hydrogen atom (H*) adsorption rate. Re-NiFeOH/N-CC exhibits high hydroxyl oxidation activity (300 mV for J300, 320 mV for J500) and this in turn satisfies the commercial criteria of alkaline water electrolysis by delivering a high current density of 300 mA cm-2 at a cell voltage of 1.88 V. The high robustness of Re-NiFeOH/N-CC catalyst in the multistep stability test (in 1 M KOH electrolyte) proves its efficacy in electricity-driven large-scale hydrogen production.
|Journal||Chemical Engineering Journal|
|Publication status||Published - 2022 May 1|
Bibliographical noteFunding Information:
This study is supported through the National research Foundation of Korea (NRF) grant funded by the Korea Government (MIST) (NRF 2019R1A2C2090443) and Korea Electric Power Corporation (Grant No. R19XO01-23).
All Science Journal Classification (ASJC) codes
- Environmental Chemistry
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering