Asian Journal of Engineering and Technology Innovation

Separate deposition of two types of metal nanoparticles on support material for enhancing catalytic activity

Tomokazu Kiyonaga

Department of Materials System Engineering, National Institute of Technology, Kurume College, Japan

Abstract

The separate deposition of Au and other metal nanoparticles (NPs), such as Pt and Pd NPs, on various support materials was developed as an effective method for enhancing the visible photo- and thermal catalysis of these materials. The type of support material is also important for both types of catalytic activities. However, the methods are limited to nanoporous-induced separate deposition and colloid photodeposition with a hole scavenger (CPH), and there may be a limited number of applicable support materials.

We established the separate deposition of Au and Pt NPs on TiO₂ by the regioselective chemisorption and subsequent in situ NaBH₄ reduction of Au(III) complex ions. The application of the chemisorption of Au(III) complex ions to such supports as SrTiO₃, ZnO, In₂O₃, Al₂O₃, has been reported, and future application of the regioselective chemisorption-induced separate deposition of Au and other metal NPs on various support materials may enable the development of new photo- and thermal catalysts.

Keywords:

Nanocomposite, Separate deposition, Metal complex, Regioselective chemisorption