Effects of sintering-resistance and large metal–support interface of alumina nanorod-stabilized Pt nanoparticle catalysts on the improved high temperature water gas shift reaction activity

• Simple preparation method of Pt nanoparticles stabilized with alumina nanorods.
• High thermal stability of Pt nanoparticles by suppressed sintering.
• Larger metal-support interface formed by Pt nanoparticles and alumina norods.
• 1.0 - 8.0 times higher TOFs for the water gas shift reaction.

Pt nanoparticles stabilized with alumina nanorods (Pt@Al2O3) were synthesized by a simple preparation method using a mixture of Pt nanoparticles, an alumina precursor, an organic surfactant, and a reducing agent. Because the alumina nanorods stabilized Pt nanoparticles, the sintering of Pt nanoparticles was significantly suppressed during a high temperature water gas shift reaction, demonstrating 1.7–13.6 times higher CO conversions or 1.0–8.0 times higher TOF compared to other alumina-supported Pt catalysts. In addition, the increased metal–support interface for Pt@Al2O3 significantly improved the water gas shift reaction activity.

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