Hot electron flux at solid–liquid interfaces probed with Pt/Si catalytic nanodiodes: Effects of pH during decomposition of hydrogen peroxide

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Title
Hot electron flux at solid–liquid interfaces probed with Pt/Si catalytic nanodiodes: Effects of pH during decomposition of hydrogen peroxide
Author(s)
Seung Hee Lee; Nedrygailov I.I.; Sunyoung Oh; Jeong Young Park
Publication Date
2018-04
Journal
CATALYSIS TODAY, v.303, no.SI, pp.282 - 288
Publisher
ELSEVIER SCIENCE BV
Abstract
Hydrogen peroxide (H2O2) is an effective oxidizing agent that is commonly used in industry. In the presence of metal catalysts, H2O2 can decompose into water and oxygen. Understanding this process at a fundamental level is extremely important for a number of industrial applications, e.g. the direct synthesis of H2O2 from H2 and O2. Here, we studied the rates of H2O2 decomposition on Pt/n-Si catalysts using a chemicurrent approach that is based on the detection of hot electrons created during dissociative adsorption of H2O2 molecules on platinum. We showed that both the rate of H2O2 decomposition and the corresponding chemicurrent are sensitive to the pH of the reactive solution. This phenomenon is explained by variation of the potential barrier for electron transfer at the Pt/solution interface caused by adsorption of H+ and OH− species from the solution on the catalytic surface. © 2017 Elsevier B.V
URI
https://pr.ibs.re.kr/handle/8788114/4785
ISSN
0920-5861
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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