Synthesis, Characterization, and Catalytic Activity of Platinum Nanoparticles on Bovine-Bone Powder: A Novel Support

S A Gama-Lara,L Argueta-Figueroa,R Natividad,Raúl A Morales-Luckie,Juan P Hinestroza,I García-Orozco

doi:10.1155/2018/6482186

Abstract

Pt nanoparticles supported on bovine-bone powder were obtained by a rather simple method consisting of immersing powder of bovine bone into a Pt+4metal ion solution at room temperature and subsequent reduction by sodium borohydride. This method eliminates the calcination step of the usual catalyst preparation methods. The nanocomposite was characterized by transmission electron microscopy (TEM), which revealed uniformly dispersed platinum nanoparticles with average particle size of 2.2 nm ± 0.6 nm. The XPS studies exhibited the presence of 63% Pt° and 37% PtO. The catalytic activity was tested in the hydrogenation of 2-butyne-1,4-diol. The nanocomposite shows good catalytic performance with nearly 100% conversion and 83% selectivity towards 2-butene-1,4-diol.

Highlights

Science and technology of nanomaterials have rapidly grown in recent years and, as a consequence, great progress in the synthesis and characterization of materials in the nanometer regime has been achieved
In order to prevent sintering and to control nanoparticles size and morphology, the use of a bovine bone was assessed as novel support for Pt nanoparticles (NPs) synthesis
The formation of the metallic platinum phase in solution in the investigated system is the direct result of the transfer of electrons from the reducing agent, NaBH4, to Pt(IV) ions according to reaction [33]: 2Pt4+ + BH4− + 4H2O 󳨀→ 2Pt + B (OH)4− + 8H+ (1)

Summary

Introduction

Science and technology of nanomaterials have rapidly grown in recent years and, as a consequence, great progress in the synthesis and characterization of materials in the nanometer regime has been achieved. The applications of these nanomaterials are diverse in the chemical industry, in electronics, and even in medicine [1, 2]. One of the main applications of nanomaterials, is in catalysis. This is due to the positive impact that high superficial area of nanoparticles exerts on reaction time, costs, and process efficiency [1, 3,4,5,6,7]. Titania, metal-organic frameworks, graphene, mesoporous silica, or various polymers have been successfully applied as supports by several research groups [8,9,10,11,12,13,14,15,16,17,18]

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