In:
Sustainable Energy & Fuels, Royal Society of Chemistry (RSC), Vol. 6, No. 18 ( 2022), p. 4153-4159
Abstract:
Urea-assisted electrolytic hydrogen production requires much lower theoretical cell voltage than the conventional water splitting technology ( E θ = 0.37 V vs. 1.23 V), serving as a promising alternative for concepts of “clean energy” and “cleaning pollutant”. However, screening highly robust catalysts with industrial-level current density ( 〉 200 mA cm −2 ) is still challenging. To overcome this challenge, bell-shaped RuFe/Ni 5 P 4 catalysts grown on nickel foam (NF) were developed via dual doping of Fe and Ru and a facile phosphidation process. The unique bell-shaped structure significantly contributes to the improved contact with the electrolyte, leading to the promoted mass transfer as well as the efficient release of CO 2 and N 2 bubbles generated during the urea oxidation reaction (UOR). Moreover, the strong electronic interaction between Ru and Ni 5 P 4 ensures high UOR activity with a high current density of 600 mA cm −2 at 1.45 V ( vs. RHE). Moreover, an assembled Ru/NF|KOH, CO(NH 2 ) 2 |RuFe/Ni 5 P 4 electrolytic cell demonstrated a highly efficient hydrogen production rate in order to reach a current density of 600 mA cm −2 at a low overall voltage of 1.55 V. This superior performance substantially satisfies the industrial requirement and paves the way to an efficient catalyst design for the UOR and green hydrogen production.
Type of Medium:
Online Resource
ISSN:
2398-4902
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2882651-6
Bookmarklink