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2015 Fiscal Year Annual Research Report

水素ナノ気泡を主題とした絶対電位の再検討

Research Project

Project/Area Number 25286002
Research InstitutionSaitama University

Principal Investigator

中林 誠一郎  埼玉大学, 理工学研究科, 教授 (70180346)

Project Period (FY) 2013-04-01 – 2016-03-31
Keywordsナノバブル / Pt(111) / 白金黒 / NHE / フラクタル / HOR / HER
Outline of Annual Research Achievements

Electrochemically formed hydrogen nanobubbles were detected by re-oxidation charge at Pt(111), polycrystalline platinum and platinized platinum electrodes. Non-electrochemical dissolution time course of the hydrogen nanobubbles was measured by open circuit potentials of each electrodes. The bubble dissolution was proceeding as two types of diffusion; the molecular diffusion to solution and two-dimensional atomic spill over at the platinum surfaces. In spite that the surface structures between the atomically flat Pt(111) and fractal surface of the platinized platinum electrodes were ultimately different, the surface densities of the hydrogen nanobubbles were almost identical. However, at the polycrystalline platinum, the density increased as the increase in the number of steps accomplished by surface roughening. The hydrogen nanobubbles were proved to exist at platinum and sulfuric acid aqueous solution without any artifact, such as hydrophobic contaminant. Although the electrochemical reaction of the normal hydrogen electrode (NHE) partly proceeded heterogeneously on the three phases boundary around the hydrogen nanobubbles, the identical density of the bubble at the atomically flat and the fractal surface supported the validity of the IUPAC recommendation for the preparation of NHE to use the platinzed platinum electrode, in stead of the polycrystalline electrode.

Research Progress Status

27年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

27年度が最終年度であるため、記入しない。

Causes of Carryover

27年度が最終年度であるため、記入しない。

Expenditure Plan for Carryover Budget

27年度が最終年度であるため、記入しない。

  • Research Products

    (2 results)

All 2016 2015

All Journal Article (2 results) (of which Peer Reviewed: 2 results)

  • [Journal Article] Quantitative Evaluation of Cancer Cell Adhesion to Self-Assembled Monolayer-Patterned Substrates by Reflection Interference Contrast Microscopy2016

    • Author(s)
      Takahisa Matsuzaki†, Kosaku Ito†, Kentaro Masuda§, Eisuke Kakinuma§, Rumi Sakamoto§, Kentaro Iketaki†, Hideaki Yamamoto∥, Masami Suganuma‡, Naritaka Kobayashi‡, Seiichiro Nakabayashi†, Takashi Tanii§, and Hiroshi Y. Yoshikawa*†
    • Journal Title

      JOURNAL OF PHYSICAL CHEMISTRY B

      Volume: 120 Pages: 1221-1227

    • DOI

      10.1021/acs.jpcb.5b11870

    • Peer Reviewed
  • [Journal Article] Feedback effect on pitting corrosion dynamics2015

    • Author(s)
      Tomoya Naganuma, Harpartap Singh , Seiichiro Nakabayashi
    • Journal Title

      JOURNAL OF SOLID STATE ELECTROCHEMISTRY

      Volume: 19 Pages: 3219-3228

    • DOI

      10.1007/s10008-015-2991-8

    • Peer Reviewed

URL: 

Published: 2017-01-06  

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