Direct electrochemical identification of rare microscopic catalytic active sites

Cameron L. Bentley, Lachlan F. Gaudin, Minkyung Kang

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5 Citations (Scopus)


Local voltammetric analysis with a scanning electrochemical droplet cell technique, in combination with a new data processing protocol (termed data binning and trinisation), is used to directly identify previously unseen regions of elevated electrocatalytic activity on the basal plane (BP) of molybdenum disulfide (2H-MoS2). This includes BP-like structures with hydrogen evolution reaction activities approaching that of the edge plane and rare nanoscale electrocatalytic "hot-spots"present at an areal density of approximately 0.2-1 μm-2. Understanding the nature of (sub)microscopic catalytic active sites, such as those identified herein, is crucial to guide the rational design of next-generation earth-abundant materials for renewable fuels production.

Original languageEnglish
Pages (from-to)2287-2290
Number of pages4
JournalChemical Communications
Issue number16
Publication statusPublished - 25 Feb 2023

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