Highly efficient Cu/anatase TiO2 {001}-nanosheets catalysts for methanol synthesis from CO2

作者：Bao Yunfeng; Huang Chunlei; Chen Limin^*; Zhang Yu Dong; Liang Long; Wen Jinjun; Fu Mingli; Wu Junliang; Ye Daiqi

来源：Journal of Energy Chemistry, 2018, 27(2): 381-388.

DOI：10.1016/j.jechem.2017.12.015

• TiO2 nanosheets
• Ti3+
• Copper
• Carbon dioxide hydrogenation
• Methanol synthesis

Anatase TiO2 nanosheets (-ns-) with dominant exposed {001} facets were used as support to load copper, and the synthesized Cu/TiO2-ns catalysts were evaluated for CO2 hydrogenation to methanol. Under the reaction conditions, P = 3.0 MPa, T = 260 degrees C, V (N-2): V(H-2): V(CO2) = 8: 69: 23 and gas hourly space velocity (GHSV) = 3600 mL g(-1) h(-1), the methanol yield reached an appealing high value, 5.6%. Copper-loading amount, calcination temperature and reduction atmosphere have been investigated in this work, which significantly influence the particle sizes of copper and/or the defect concentration in TiO2, then leading to different catalytic performance. Characterizations of XRD, EPR, CO2-TPD and FTIR demonstrate that higher specific surface area of Cu is good for the hydrogenation of CO2 and adequate amount of Ti3+ plays important roles in CO2 activation. Both of them facilitate high turnover frequency (TOF) of methanol formation.

• 单位
  华南理工大学