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<p>The primary focus for hydrogen (H<sub>2</sub>) energy production is to develop economical and efficient catalysts. This study described hydrothermal synthesis of samarium (Sm) doped manganese telluride (MnTe) in which Sm-doping significantly improved MnTe’s OER performance in aqueous basic medium (1.0 M KOH). Several investigations revealed that Sm-doped MnTe had an orthorhombic structure, an outstanding surface area of 45 m<sup>2</sup>/g, and morphology of highly agglomerated nanoparticles. The optimized Sm-doped MnTe demonstrates best OER activity compared to pure MnTe exhibits a reduced OER onset potential of 1.44 V, overpotential (177 mV) at 10 mA/cm<sup>2</sup>, minimal Tafel value (34 mV/dec), and small charge-transfer resistance (0.06 Ω) respectively. It demonstrates durability over a period of 40 h and retains stability even after completing 3000 cycles. These findings highlight that integration of rare-earth dopant samarium (Sm) into metal tellurides can be effective in improving their performance in optimizing the OER for energy conversion applications.</p> Graphical Abstract <p></p>

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Enhancement of MnTe electrocatalytic properties via Sm doping strategy employed for OER application

  • 期刊论文

  • 发表日期：

    2025年2月22日

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  • Aqsa Maheen,
  • Sarah A. Alsalhi,
  • Kiran Tahir,
  • Abhinav Kumar,
  • RSK Sharma,
  • Piyus Kumar Pathak,
  • Suman Saini,
  • Vivek Kumar Pandey,
  • Rajesh Haldhar

摘要

The primary focus for hydrogen (H2) energy production is to develop economical and efficient catalysts. This study described hydrothermal synthesis of samarium (Sm) doped manganese telluride (MnTe) in which Sm-doping significantly improved MnTe’s OER performance in aqueous basic medium (1.0 M KOH). Several investigations revealed that Sm-doped MnTe had an orthorhombic structure, an outstanding surface area of 45 m2/g, and morphology of highly agglomerated nanoparticles. The optimized Sm-doped MnTe demonstrates best OER activity compared to pure MnTe exhibits a reduced OER onset potential of 1.44 V, overpotential (177 mV) at 10 mA/cm2, minimal Tafel value (34 mV/dec), and small charge-transfer resistance (0.06 Ω) respectively. It demonstrates durability over a period of 40 h and retains stability even after completing 3000 cycles. These findings highlight that integration of rare-earth dopant samarium (Sm) into metal tellurides can be effective in improving their performance in optimizing the OER for energy conversion applications.

Graphical Abstract