Laser-Assisted Production of Carbon-Encapsulated Pt-Co Alloy Nanoparticles for Preferential Oxidation of Carbon Monoxide

Gema Martinez; Ana Malumbres; Angela Lopez; Reyes Mallada; Jose L Hueso; Jesus Santamaria

doi:10.3389/fchem.2018.00487

Laser-Assisted Production of Carbon-Encapsulated Pt-Co Alloy Nanoparticles for Preferential Oxidation of Carbon Monoxide

Front Chem. 2018 Oct 16:6:487. doi: 10.3389/fchem.2018.00487. eCollection 2018.

Authors

Gema Martinez^{1

2}, Ana Malumbres², Angela Lopez², Reyes Mallada^{1

2}, Jose L Hueso^{1

2}, Jesus Santamaria^{1

2}

Affiliations

¹ Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Zaragoza, Spain.
² Department of Chemical Engineering, Nanoscience Institute of Aragon (INA), Universidad de Zaragoza, Zaragoza, Spain.

Abstract

C-encapsulated highly pure Pt_xCo_y alloy nanoparticles have been synthesized by an innovative one-step in-situ laser pyrolysis. The obtained X-ray diffraction pattern and transmission electron microscopy images correspond to Pt_xCo_y alloy nanoparticles with average diameters of 2.4 nm and well-established crystalline structure. The synthesized Pt_xCo_y/C catalyst containing 1.5 wt% of Pt_xCo_y nanoparticles can achieve complete CO conversion in the temperature range 125-175°C working at weight hourly space velocities (WHSV) of 30 L h^-1g^-1. This study shows the first example of bimetallic nanoalloys synthesized by laser pyrolysis and paves the way for a wide variety of potential applications and metal combinations.

Keywords: PtxCoy/C catalyst; bimetallic alloy; laser pyrolysis; nanoparticles; preferential CO oxidation.