Ni(OH)2 Coated CoMn-Layered Double Hydroxide Nanowires as Efficient Water Oxidation Electrocatalysts

Xue Li, Komal Patil, Ashutosh Agarwal, Pravin Tukaram Babar, Jun Sung Jang, Xing Chen, Yung Tae Yoo, Jin Hyeok Kim

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Core–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.
Original languageEnglish (US)
JournalNew Journal of Chemistry
DOIs
StatePublished - 2022

Bibliographical note

KAUST Repository Item: Exported on 2022-01-25
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 Chemistry
  • General Chemistry
  • Catalysis

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