Chemical Research in Chinese Universities ›› 2020, Vol. 36 ›› Issue (1): 127-133.doi: 10.1007/s40242-020-9096-3

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Intercalation Effect in NiAl-layered Double Hydroxide Nanosheets for CO2 Reduction Under Visible Light

KIPKORIR Peter, TAN Ling, REN Jing, ZHAO Yufei, SONG Yu-Fei   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
  • Received:2019-12-11 Revised:2020-01-02 Online:2020-02-01 Published:2020-01-20
  • Contact: ZHAO Yufei, SONG Yu-Fei E-mail:zhaoyufei@mail.buct.edu.cn;songyf@mail.buct.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.U1707603, 21625101, 21521005, U1507102 and 21878008), the National Key Research and Development Program of China(No.2017YFB0307303), the National Basic Research Program(973 Program) of China(No.2014CB932104), the Natural Science Foundation of Beijing, China(Nos.2182047, 2202036) and the Fundamental Research Funds for the Central Universities, China(No.XK1802-6).

Abstract: Photocatalytic reduction of CO2(CO2PR) to valuable solar fuels is considered as a promising route to the amelioration of fossil fuel conundrum and the mitigation of greenhouse gases. Although progress has been made to enhance CO2PR performance, the available method that can promote the selectivity of CO2PR products remains to be a challenge. In this work, we synthesized NO3- or CO32- intercalated NiAl-layered double hydroxide(NiAl-LDH) photocatalysts and investigated the performance of CO2PR in the presence of an electron donor and a photosensitizer. Compared with Ni2Al-CO32-, Ni2Al-NO3- exhibited superior catalytic performance in the CO2PR, and the resulted selectivity of CH4 in Ni2Al-NO3-(6.1%) was 12.2 times that of Ni2Al-CO32-(0.5%) under visible light irradiation. X-Ray absorption fine structure(XAFS) result reveals a relative abundance of defects in Ni2Al-NO3-, which played as active sites and promoted charge transfer in CO2PR for the efficient CH4 evolution.

Key words: Visible light catalysis, CO2 photoreduction, Layered double hydroxide, Intercalated anion, Defect