articleJournal of the American Chemical SocietyJan 2, 2026Closed access

Transient Imaging of the Oxygen Reduction Reaction at Single Nanocatalysts

DYDaixin YeYKYan-Chen KongCXCong-Hui XuZMZijian MaYXYao Xiong

Shanghai University · Centre for Sustainable Energy

PubMed
Indexed incrossrefpubmed

Abstract

The initiation of Faradaic reactions at the single-particle level is crucial for uncovering fundamental kinetic principles. However, resolving this early stage is highly challenging because of its ultrafast dynamics and dominant interference from capacitive currents. Here, we report a transient electrogenerated chemiluminescence microscopy (ECLM) that enables real-time visualization of the initiation and evolution of the oxygen reduction reaction (ORR) at individual single-atom catalysts. By integrating a potentiostatic double-pulse-relaxation strategy, sparsely generated H2O2 at the onset of ORR can be sensitively detected and transduced into photon emission by the ECL reaction. Monitoring these transient…

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5
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20.47
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Topics & keywords

Topics
Keywords
  • Microsecond
  • Transient (computer programming)
  • Temporal resolution
  • Nanomaterial-based catalyst
  • Electrocatalyst
  • Ultrashort pulse
  • Catalysis
  • Kinetic energy
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