Ni(OH)2 Coated CoMn-Layered Double Hydroxide Nanowires as Efficient Water Oxidation Electrocatalysts
Babar, Pravin Tukaram
Jang, Jun Sung
Yoo, Yung Tae
Kim, Jin Hyeok
KAUST DepartmentAdvanced Membranes and Porous Materials Research Center
Embargo End Date2023-01-20
Permanent link to this recordhttp://hdl.handle.net/10754/675063
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AbstractCore–shell nanowires of first-row transition metals are important members of nanostructured electrocatalysts for water oxidation owing to their superior electrocatalytic performance and tremendous promise as substitutes for noble-metal-based electrocatalysts. Recently, core–shell structures have attracted plenty of attention in the field of sustainable and affordable energy conversion and storage. In this research, we have prepared a hierarchical structure of nickel hydroxide (Ni(OH)2) coated on CoMn layered double hydroxide (CoMn-LDH) nanowires (labeled as Ni(OH)2@CoMn-LDH) as an oxygen evolution reaction (OER) electrocatalyst. This as-prepared Ni(OH)2@CoMn-LDH/NF electrode exhibits excellent oxygen evolution reaction (OER) performance with a lower overpotential of 250 and 341 mV at a current density of 30 and 100 mA cm−2 respectively (without iR-correction) along with a lower Tafel slope of 102 mV dec−1. In addition, Ni(OH)2@CoMn-LDH/NF remains stable for more than 25 h in 1 M KOH electrolyte. The outstanding OER behavior was ascribed to the ultrathin Ni(OH)2 coating deposited on conducting CoMn-LDH, which provides strong active sites with sufficient channels for electron transfer.
CitationLi, X., Patil, K., Agarwal, A., Babar, P., Jang, J. S., Chen, X., … Kim, J. H. (2022). Ni(OH)2 Coated CoMn-Layered Double Hydroxide Nanowires as Efficient Water Oxidation Electrocatalysts. New Journal of Chemistry. doi:10.1039/d1nj04792b
SponsorsThis 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).
PublisherRoyal Society of Chemistry (RSC)
JournalNew Journal of Chemistry