Journal of Inorganic Materials ›› 2019, Vol. 34 ›› Issue (8): 803-810.DOI: 10.15541/jim20180373

Special Issue: 电催化研究

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Attapulgite/g-C3N4 Composites: Synthesis and Electrocatalytic Oxygen Evolution Property

ZHANG Sheng,JIANG Yi,JI Yuan-Yuan,DU Ying,SHENG Zhen-Huan,YIN Jing-Zhou,LI Qiao-Qi,ZHANG Li-Li()   

  1. Jiangsu Environmental Engineering Laboratory, Jiangsu Key Laboratory for Low-dimension Materials, School of Chemistry and Chemical Enginering, Huaiyin Normal University, Huaian 223300, China
  • Received:2018-08-15 Revised:2018-10-09 Published:2019-08-20 Online:2019-04-18
  • Supported by:
    National Natural Science Foundation of China(51472101);The Big Six-talent project of Jiangsu Province(JY-31);Natural Science Foundation of Jiangsu Province(BK20161305);Undergraduate Innovation Program of Jiangsu Province(201710323004Z)

Abstract:

A novel kind of electrocatalytic oxygen evolution catalyst was fabricated by introducing g-C3N4 ultrathin films onto the surface of attapulgite (ATP) via a simple in-situ depositing technique, combined with freeze-drying and programmed roasting process. The obtained product was identified as ATP/g-C3N4. In order to achieve the best catalyst, a series of ATP/g-C3N4 composites with different mass fraction of ATP were obtained and marked as ATP/g-C3N4-w, where w represents the mass fraction of ATP (w =mATP: (mATP + mg-C3N4)= 0.33, 0.40, 0.50, 0.67). Results show that g-C3N4 thin layers are uniformly loaded onto the ATP surface via the chemical bond (Si-O-C), which is beneficial to tailor the surface electronic structure of g-C3N4 and provide more active sites. Their electrocatalytic oxygen evolution properties in 0.1 mol/L KOH were investigated. It is found that ATP/g-C3N4-0.50 presents the best oxygen evolution catalytic performance and has excellent oxygen evolution stability. Its oxygen evolution over potential is 410 mV and the Tafel slope is 118 mV/dec at a current density of 10 mA/cm 2. The results suggest that ATP/ g-C3N4-0.50 can be used as a potential oxygen evolution catalyst.

Key words: attapulgite, g-C3N4, electrocatalysis, oxygen evolution veaction

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