New electrochemiluminescence catalyst: Cu2O semiconductor crystal and the enhanced activity of octahedra synthesized by iodide ions coordination

Ling Zhang, Liming Qi, Wenyue Gao, Wenxin Niu, Rafael Luque, Guobao Xu

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Cuprous oxide (Cu2O) crystals are usually used as the photocatalysts of water splittings and carbon monoxide oxidations. Herein, we report the new catalytic properties of Cu2O to the electrochemilumenescence (ECL) reactions of luminol and oxygen. Adjusting the shape of Cu2O microcrystals from cube to octahedra also facilities the improved electrocatalytic acticity, where octahedral Cu2O microcrystals possess higher ECL signal by 25% at -0.6 V (versus Ag/AgCl) at pH 7.4. The octahedral Cu2O microcrystals are synthesized by the coordination of iodide ions to the surface, which alters the crystals shapes from cubes to octahedra. Size-distribution of octahedra is improved with this mehod compared to the previous studies with only hydroxide ions as the coordinates. The catalytic activity of octahedral Cu2O crystals is expected to be compared with the noble metal nanomaterials and constructed the high-efficiency and low-cost ECL biosensors.
Original languageEnglish
Article number115021
JournalMaterials Research Express
Volume4
Issue number11
Number of pages8
ISSN2053-1591
DOIs
Publication statusPublished - 2017

Keywords

  • cuprous oxide
  • electrochemiluminescence
  • catalysis
  • crystal shape
  • iodide
  • Heterogeneous catalysis at surfaces and other surface reactions
  • Electromagnetic radiation spectrometry (chemical analysis)
  • Crystal structure of specific inorganic compounds
  • Chemiluminescence (condensed matter)
  • Crystal growth from solution
  • Chemiluminescence and chemical laser kinetics
  • Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials
  • Electrochemistry and electrophoresis
  • adsorption
  • catalysts
  • chemiluminescence
  • copper compounds
  • crystal growth from solution
  • crystal structure
  • electrochemical electrodes
  • nanostructured materials
  • pH
  • semiconductor materials
  • spectrochemical analysis
  • iodide ions coordination
  • water splittings
  • carbon monoxide oxidations
  • catalytic properties
  • electrochemilumenescence reactions
  • crystals shapes
  • hydroxide ions
  • semiconductor crystal
  • octahedral microcrystals
  • electrocatalytic activity
  • electrochemiluminescence catalyst
  • voltage -0.6 V
  • Cu2O

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