A p-n heterojunction of CuI/TiO2 with enhanced photoelectrocatalytic activity for methanol electro-oxidation

作者：Sun, Mingjuan; Hu, Jiayue; Zhai, Chunyang; Zhu, Mingshan^*; Pan, Jianguo^*

来源：Electrochimica Acta, 2017, 245: 863-871.

DOI：10.1016/j.electacta.2017.06.035

• p-n heterojunction
• CuI
• TiO2
• methanol oxidation
• photoelectrocatalyst

In this paper, a p-n heterojunction including p-type CuI and n-type TiO2 is first time constructed to be the support for the deposition of Pt. The as-prepared Pt-CuI/TiO2 modified electrode is studied for the electrocatalytic oxidation of methanol both in dark and under light illumination. Compare to traditional electrocatalytic oxidation, the electrocatalytic activity of Pt-CuI/TiO2 for methanol oxidation is improved with 4.0 times upon light illumination. Moreover, compare to bare CuI and TiO2 upon light illumination, the heterostructure of CuI/TiO2 displays 4.3 and 9.1 times enhanced electrocatalytic activity for methanol oxidation, respectively. The synergistic effects of photocatalysis and electrocatalysis as well as the effective charge transport in the p-n heterojunction of Pt-CuI/TiO2 contribute such big enhancement. The present studies indicate that the constructing of p-n heterojunction provides more insights in the fields of photoelectrochemical and photo-assisted fuel cell system.

• 出版日期2017-8-10
• 单位宁波大学