Chinese Journal of Catalysis ›› 2017, Vol. 38 ›› Issue (6): 1045-1051.DOI: 10.1016/S1872-2067(17)62809-2

• Articles • Previous Articles     Next Articles

Amorphous ferric oxide as a hole-extraction and transfer layer on nanoporous bismuth vanadate photoanode for water oxidation

Ling Qiana, Pengfei Liua, Le Zhanga, Chongwu Wanga, Shuang Yanga, Lirong Zhengb, Aiping Chena, Huagui Yanga   

  1. a. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China;
    b. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-02-27 Revised:2017-03-27 Online:2017-06-18 Published:2017-06-08
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21373083, 21573068), and Program of Shanghai Subject Chief Scientist (15XD1501300) and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry and Science Technology Commission of Shanghai Municipality (14JC1490900)

Abstract:

An amorphous ferric oxide layer was prepared on a bismuth vanadate photoanode. This resulted in improved charge carrier separation and surface catalytic performance compared with the photoanode without the oxide layer. The photocurrent of the oxide-layer-containing photoanode was 2.52 mA/cm2 at 1.23 V versus the reversible hydrogen electrode, in potassium phosphate buffer (0.5 mol/L, pH = 7.0). The amorphous ferric oxide layer on the photoanode contained low-valence-state iron species (FeII), which enabled efficient hole extraction and transfer.

Key words: Ferric oxide layer, Amorphous, Bismuth vanadate, Photoanode, Oxygen evolution