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<p>The development of advanced electrocatalysts for oxygen evolution reaction (OER) is essential for improving effectiveness of electrocatalytic water splitting (EWS). Perovskite-type oxides acquired attention for their outstanding electrocatalytic capabilities in OER performance. This research involved the preparation of reduced graphene oxide (rGO) based perovskite CoSnO<sub>3</sub> material via basic hydrothermal technique to improve OER efficiency. The produced composite was tested by multiple analytical methods to evaluate its structural, surface area and compositional properties. CoSnO<sub>3</sub>/rGO catalyst demonstrated a remarkable overpotential (η) of 209 mV at 10 mA cm<sup>−2</sup>, along with Tafel slope (36 mV dec<sup>−1</sup>), showcasing enhanced OER performance. Electrochemical surface area (ECSA) of CoSnO<sub>3</sub>/rGO catalyst was obtained to be 642.5 cm<sup>2</sup>, with enhanced cyclic durability of 35 h and least charge transfer resistance (R<sub>ct</sub>) of 0.88 Ω. The outcomes indicated that incorporating rGO resulted in an increased surface area (SA), which enhanced conductivity and significantly improved the OER activity of the catalysts. The noteworthy electrochemical characteristics of CoSnO<sub>3</sub>/rGO composite render it a superior material for applications in electrical and various other domains in the future.</p> Graphical Abstract <p></p>

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Synthesis of high performance electrocatalyst material for OER by hydrothermal method based on CoSnO3/rGO composite

  • 期刊论文

  • 发表日期：

    2025年4月30日

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  • Areesha Khan,
  • Soumaya Gouadria,
  • Subhash Chandra,
  • Jayanti Makasana,
  • Suhas Ballal,
  • T. Krithiga,
  • Piyus Kumar Pathak,
  • Rahul Raj Chaudhary,
  • VL Mishra,
  • Abhinav Kumar

摘要

The development of advanced electrocatalysts for oxygen evolution reaction (OER) is essential for improving effectiveness of electrocatalytic water splitting (EWS). Perovskite-type oxides acquired attention for their outstanding electrocatalytic capabilities in OER performance. This research involved the preparation of reduced graphene oxide (rGO) based perovskite CoSnO3 material via basic hydrothermal technique to improve OER efficiency. The produced composite was tested by multiple analytical methods to evaluate its structural, surface area and compositional properties. CoSnO3/rGO catalyst demonstrated a remarkable overpotential (η) of 209 mV at 10 mA cm−2, along with Tafel slope (36 mV dec−1), showcasing enhanced OER performance. Electrochemical surface area (ECSA) of CoSnO3/rGO catalyst was obtained to be 642.5 cm2, with enhanced cyclic durability of 35 h and least charge transfer resistance (Rct) of 0.88 Ω. The outcomes indicated that incorporating rGO resulted in an increased surface area (SA), which enhanced conductivity and significantly improved the OER activity of the catalysts. The noteworthy electrochemical characteristics of CoSnO3/rGO composite render it a superior material for applications in electrical and various other domains in the future.

Graphical Abstract