Au-Pd alloy nanoparticles catalyze the colorimetric detection of hydrazine with methylene blue

Wei Liu, Guangchao Zheng, Wing Leung Wong, Kwok Yin Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)


A colorimetric detection of hydrazine using Au–Pd alloy nanoparticles (NPs) as catalyst is described, in which methylene blue (methylthioninium chloride) acts as a redox indicator. The sensing system with Au–Pd NPs shows a rapid response at room temperature, leading to a color change within a few minutes, which is not achievable with Au or Pd NPs. A linear change in absorbance versus hydrazine concentration ranging from 0.1 to 5.0 mM can be obtained with a detection limit of ~4 × 10−4 M. The catalytic activity of the Au–Pd NPs in the reaction can be attributed to the electronic inductive effect by Au on Pd in the alloy NPs.

Original languageEnglish
Article number107455
JournalInorganic Chemistry Communications
Publication statusPublished - Sep 2019

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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