Seong, Hoeun Oh, Myeonghwan Jin, Kyoungsuk Lee, Dong Ki 2025-11-21T02:04:02Z 2025-11-21T02:04:02Z 2025-11-11 2025-11 2380-8195 https://pubs.kist.re.kr/handle/201004/153586 The performance of electrochemical glucose oxidation has been overestimated due to a lack of understanding of the interactions between the catalyst surface and glucose. Herein, we unravel the mechanisms of glucose oxidation using atomically well-defined Au25 nanoclusters, exhibiting exceptional activity while maintaining structural integrity. The oxidation reactivity is significantly influenced by applied potential and accordingly altered chemical state of the Au surface, with three distinct mechanisms leading to dominance at different potential regions: an aerobic oxidation pathway near open-circuit, a 1e- electrocatalytic pathway prevailing at low potentials, and a typical 2e- electrocatalytic pathway dominating at higher potentials. The aerobic pathway involves coupling glucose oxidation with an O2 reduction, producing gluconic acid and H2O2, respectively, without an applied potential. In the 1e- pathway, the alpha-hydrogen of glucose is stripped by the Au surface, resulting in a simultaneous production of gluconic acid and H2 at the anode. Unveiling these pathways enabled the precise evaluation of performance as 100% Faraday efficiency across all potential ranges. Our findings provide a definitive framework for elucidating the structure-activity relationship in the electrocatalysis of biomass. English American Chemical Society Unraveling the Thermocatalytic and Electrocatalytic Pathways of Glucose Oxidation on Gold Surfaces Using Atomically Precise Au25 Nanoclusters Article 10.1021/acsenergylett.5c01524 1 ACS Energy Letters, v.10, no.11, pp.5373 - 5382 ACS Energy Letters 10 11 5373 5382 Y scie scopus 001591534900001 2-s2.0-105018463865 Chemistry, Physical Electrochemistry Energy & Fuels Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Science & Technology - Other Topics Materials Science Article NANOPARTICLES CO2 ELECTROCHEMICAL OXIDATION ACIDIC PROPERTY ELECTROOXIDATION MECHANISM ALCOHOLS CATALYST