Trimetallic selenides as bifunctional electrocatalysts for oxygen evolution reaction (OER) and urea oxidation reaction (UOR) have rarely been reported. Herein, we successfully synthesized nickel-iron-cobalt diselenides on the nickel foam (NiFeCoSe2) by a one-step electrodeposition method. The as-prepared NiFeCoSe2 nanosheets on nickel foam (NF) exhibited significantly improved electrocatalytic performance and stability in a highly alkaline medium (1 M KOH) with and without 0.33 M urea. In particular, the obtained NiFeCoSe2 only requires a potential of 1.52 V (vs. RHE) for OER and 1.37 V (vs. RHE) for UOR to achieve a current density of 50 mA cm−2, along with a stability of 30 h. This was attributed to the unique interconnected nanosheets, binder-free in-situ selenium electrodeposition, synergistic effect, and strong electron interaction of Ni, Fe, Co, and Se elements. This study provides a new avenue for the construction of multimetal selenide electrocatalysts with excellent properties for the oxidation of water and urea.
|Original language||English (US)|
|Journal||Materials Chemistry and Physics|
|State||Published - Jun 2 2022|
Bibliographical noteKAUST Repository Item: Exported on 2022-06-14
Acknowledgements: This work was supported by the Human Resources Development Program (No. 20194030202470) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant funded by the Korean Government Ministry of Trade, Industry, and Energy and supported by the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2018R1A6A1A03024334).
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics