Rational synthesis of phosphorous rich iridium diphosphide (IrP2) nanostructures for electrochemical H2S detection

Seoyoung Jeong, Chaewon Song, Jiwon Kim, Youngmi Lee, Myung Hwa Kim

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Although iridium diphosphide (IrP2) has emerged as a promising electrocatalyst, the harsh synthetic conditions requiring high temperature (≥ 850 ℃) limits its wide application. This paper demonstrates a facile synthetic approach of single-phase IrP2 nanoparticles under a mild condition. Instead of commonly used iridium chloride precursors (e.g., IrClx), Ir(OH)3 formed via acid/base precipitation reaction was employed as the iridium source. The following phosphorization step at 650 °C under argon atmosphere successfully produced IrP2 nanoparticles. Moreover, the electroactivity of as-prepared IrP2 nanoparticles for electrochemical oxidation of hydrogen sulfide (H2S) was investigated for the first time. IrP2 nanoparticles showed an excellent amperometric response to H2S with ca. 2.5-fold greater sensitivity than iridium phosphide (Ir2P), presenting the feasibility of IrP2 as an efficient electrode material for electrochemical H2S sensing.

Original languageEnglish
Article number169649
JournalJournal of Alloys and Compounds
Volume947
DOIs
StatePublished - 25 Jun 2023

Bibliographical note

Publisher Copyright:
© 2023 Elsevier B.V.

Keywords

  • Electrocatalyst
  • HS sensor
  • IrP
  • Nanoparticles

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