使用双层 Cu2O 球改性的 Fe2O3 纳米管高效协同转化 CO2 为甲醇。

High-efficiency synergistic conversion of CO2 to methanol using Fe2O3 nanotubes modified with double-layer Cu2O spheres.

机构信息

Department of Chemistry, Shandong Agricultural University, 61Daizong Road, Tai'an, Shandong 271018, People's Republic of China.

出版信息

Nanoscale. 2014 Oct 7;6(19):11380-6. doi: 10.1039/c4nr02902j.

DOI:10.1039/c4nr02902j

PMID:25144767

Abstract

Cuprous oxide/hematite nanotubes (Cu2O/Fe2O3NTs) were prepared by a potentiostatic electrodeposited method, in which different structured Cu2O materials were modified onto Fe2O3 NTs surface. Among them, the material with double-layer Cu2O spheres (Cu2O/Fe2O3 NTs-30) showed excellent photoelectrocatalytic (PEC) properties with a suitable energy band gap (1.96 eV) and a smaller overpotential (0.18 V). Furthermore, Cu2O/Fe2O3 NTs-30 showed two types of synergisms in the PEC reduction of CO2: (i) between electrocatalysis and photocatalysis and (ii) between Cu2O and Fe2O3NTs. The faradaic efficiency and methanol yield reached 93% and 4.94 mmol L(-1) cm(-2) after 6 h, respectively.

摘要

氧化亚铜/赤铁矿纳米管（Cu2O/Fe2O3NTs）通过恒电位电沉积法制备，其中不同结构的 Cu2O 材料被修饰到 Fe2O3 NTs 表面。其中，具有双层 Cu2O 球的材料（Cu2O/Fe2O3 NTs-30）表现出优异的光电催化（PEC）性能，具有合适的能带隙（1.96 eV）和较小的过电位（0.18 V）。此外，Cu2O/Fe2O3 NTs-30 在 CO2 的 PEC 还原中表现出两种协同作用：（i）电催化和光催化之间，以及（ii）Cu2O 和 Fe2O3NTs 之间。经过 6 小时后，法拉第效率和甲醇产率分别达到 93%和 4.94 mmol L(-1) cm(-2)。