Effect of Sulfurization on SILAR Synthesized Cobalt Phosphate Hydrate Nanosheets for Oxygen Evolution Reaction

Girish Kamble; Dhanaji Malavekar; Suyoung Jang; Jin Hyeok Kim

doi:10.3740/MRSK.2022.32.10.408

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Effect of Sulfurization on SILAR Synthesized Cobalt Phosphate Hydrate Nanosheets for Oxygen Evolution Reaction

October 2022. pp. 408-413

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Abstract

The oxygen evolution reaction (OER) is very sluggish compared to the hydrogen evolution reaction (HER). Considering this difference is essential when designing and developing a cost-effective and facile synthesis method for a catalyst that can effectively perform OER activity. The material should possess a high surface area and more active sites. Considering these points, in this work we successfully synthesized sheets of cobalt phosphate hydrate (CP) and sulphurated cobalt phosphate hydrate (CPS) material, using simple successive ionic layered adsorption and reaction (SILAR) methods followed by sulfurization. The CP and CPS electrodes exhibited overpotentials of 279 mV with a Tafel slope of 212 mV dec^-1 and 381 mV with a Tafel slope of 212 mV dec^-1, respectively. The superior performance after sulfurization is attributed to the intrinsic activity of the deposited well-aligned nanosheet structures, which provided a substantial number of electrochemically active surface sites, speeded electron transfer, and at the same time improved the diffusion of the electrolyte.

Keywords

cobalt phosphate

chemical bath sulfurization

successive ionic layered adsorption and reaction

oxygen evolution reaction

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 32
No :10
Pages :408-413
Received Date : 2022-09-15
Revised Date : 2022-09-15
Accepted Date : 2022-09-30
DOI :https://doi.org/10.3740/MRSK.2022.32.10.408

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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