Phothelectrochemical Behavior of Iron Oxide/n-Si Heterojunction Electrodes with an Outer Pd Layer

Tetsuya Osaka, Kiyomi Ejiri, I. Naruya Hirota

研究成果: Article査読

20 被引用数 (Scopus)

抄録

Iron oxide/n-Si heterojunction electrodes modified by an outer Pd layer were studied for its utility as an efficient photoanode. The addition of an evaporated Pd layer on the electrode greatly enhanced the photocurrent and shifted the onset potential from 0.5V (Hg-HgO) to the more cathodic side in a 0.2M KOH solution. A 100Å Pd layer showed the most cathodic onset potential of-0.36V (Hg-HgO). The unmodified iron oxide/n-Si electrode gave a relatively broad spectral photoresponse with the maximum region lying between 550 and 700 nm. With the addition of the Pd layer the quantum efficiency of spectral photoresponse from 400 to 800 nm became 20% higher. The addition of methanol enhanced the photocurrent up to 1.25 times at 0.6M concentration on the unmodified electrode, whereas on the Pd-modified electrode, the photocurrent decreased slightly by the addition of methanol. These phenomena are discussed in terms of various mechanisms for methanol oxidation.

本文言語English
ページ(範囲)1571-1574
ページ数4
ジャーナルJournal of the Electrochemical Society
131
7
DOI
出版ステータスPublished - 1984 7

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 再生可能エネルギー、持続可能性、環境
  • 表面、皮膜および薄膜
  • 電気化学
  • 材料化学

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