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Nano Research

Article Title

Au/CuSiO3 nanotubes: High-performance robust catalysts for selective oxidation of ethanol to acetaldehyde

Keywords

ultrathin, nanowires, AuPd alloy, catalysts

Abstract

Novel gold-supporting silicate nanotubes are synthesized via a hydrothermalmethod followed by colloid deposition. Their catalytic performance for theselective oxidation of ethanol to acetaldehyde is assessed. The results show thatAu/CuSiO3 nanotubes exhibit both high activity and selectivity at high gashourly space velocity (GHSV). Ethanol conversion can reach up to ~98%, andthe selectivity for acetaldehyde is ~93% at 250 °C and ~100,000 mL·gcat–1·h–1. Incomparison, the catalytic activity of Au/MgSiO3 nanotubes is relatively low, andethanol conversion reaches only ~25% at 250 °C. However, when Cu species areadded to Au/MgSiO3, the catalytic activity improves significantly, indicatingthat the interactions between Au nanoparticles and Cu species are responsiblefor the high performance for selective oxidation of ethanol to acetaldehyde.

Graphical Abstract

Publisher

Tsinghua University Press

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