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Deep reconstruction of Ni-doped CoOOH under industrial conditions for efficient oxygen evolution.
- Source :
-
International Journal of Hydrogen Energy . Jan2024:Part A, Vol. 49, p1194-1203. 10p. - Publication Year :
- 2024
-
Abstract
- Hydrogen production by water electrolysis is considered to be economical and environmentally friendly. Encouraging the reconstruction of electrocatalysts during the oxygen evolution reaction (OER), which produces a large number of active species with high activity, might be viewed as a promising technique for increased activity. In this work, thermally induced complete reconstructions (TICR) are used to create (oxy)hydroxide with low crystallinity and abundant boundary/vacancy from molybdate precatalysts. The obtained Ni-doped CoOOH (CMO 1200-90 /NF) with boundary/vacancy demonstrates the efficient electrocatalytic activity for OER. An oxygen precipitation overpotential of 299 mV (100 mA cm−2) is exhibited, while the durability of this structure is verified in a strong corrosive environment (1 M KOH) with a long-term stability of 100 h. Compared with Ni-doped CoMoO 4 precatalyst, the overpotential is reduced by 102 mV at 100 mA cm−2. During the hydrothermal process, trace amounts of Ni elements are doped and have a synergistic effect with Co to induce the modulation of electronic structure. This work investigates the phenomenon of thermally induced and highlights the commercial potential of deep reconstruction catalysts in high-temperature water electrolysis. [Display omitted] • CMO 1200-90 /NF nanosheets were synthesized using a thermally induced reconstruction method. • The rapid dissolution of MoO 4 2− and the formation of CoOOH loose layer generated by the reconstruction process. • Ni incorporation can adjust the electronic structure, and significantly improve the OER performance. • CMO 1200-90 /NF exhibits motivated OER activity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 49
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 174060063
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2023.09.079