Pt co-catalyst effect on photoelectrochemical properties of 3C-SiC photo-anode

Jun Tae Song, Takayuki Iwasaki, Mutsuko Hatano

研究成果: ジャーナルへの寄稿学術誌査読

6 被引用数 (Scopus)

抄録

The effect of Pt co-catalyst fabricated with various annealing temperatures on photoelectrochemical (PEC) properties of 3C-SiC photo-anode was investigated. 3C-SiC with Pt co-catalyst shows the greater PEC reaction compared with bare 3C-SiC. A further enhancement is found by annealing process due to the Pt particle structure and enhanced contact of 3C-SiC and Pt. The formation of Pt particles improves the PEC reaction of samples annealed at 500 and 700 °C. Here, 3C-SiC with the Pt annealed at 500°C shows the largest photocurrent, 3.47 mA/cm2 at an applied bias of 1V (vs Ag/AgCl) and the lowest onset potential, 0.74V with the optimum particle size. It is also considered to have appropriate contact by the proper Pt2Si formation, revealed by X-ray photoelectron microscopy. Although photocurrent is improved after anneal at 700°C, the onset potential becomes almost same as bare 3C-SiC. Furthermore, the photo-activity after anneal at 900°C is even degraded compared to the bare 3C-SiC because of the evolution of immoderate carbon compounds suppressing Pt co-catalyst effect.

本文言語英語
論文番号05FZ04
ジャーナルJapanese Journal of Applied Physics
53
5 SPEC. ISSUE 1
DOI
出版ステータス出版済み - 5月 2014
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 工学(全般)
  • 物理学および天文学(全般)

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