Pd–Au Bimetal Supported on Rutile–TiO2 for Selective Synthesis of Hydrogen Peroxide by Oxidation of H2 with O2 under Atmospheric Pressure

Abstract

Rutile TiO2 support is effective for increasing the formation rate as well as selectivity to H2O2. A great enhancement in the H2O2 formation rate and selectivity is achieved by controlling the particle size of Pd–Au (7:3 in weight ratio) alloy, and the average size of 18 nm exhibits the high selectivity to H2O2 under atmospheric pressure.

Brønsted–Evans–Polanyi Relations for H2O2 Synthesis on Gold Surfaces

“…Recently, Hutchings has reported that nitric-acid pretreated AuPd catalyst supported on carbon gives high yields of H 2 O 2 with hydrogen selectivities greater than 95% [14]. Particle size, atomic/surface compositions, the shape and exposed facets of nanocatalysts particles are all the influent factors of catalytic performances of AuPd [15][16][17]. Recently, these isolated Pd atoms within the gold matrix are indentified as the most active catalytic center for vinyl-acetate synthesis and the direct H 2 O 2 synthesis reaction [18][19][20][21].…”

Photocatalytic degradation of malathion in aqueous solution using an Au–Pd–TiO2 nanotube film

“…It was reported that, compared with the corresponding gold or palladium monometallic catalysts [20,21], the combination of them exhibited an obvious synergistic effect and greatly enhanced their catalytic activity and selectivity [22][23][24]. The catalytic behaviors of Au-Pd bimetal catalysts in the absence of light illumination have already been extensively studied [25][26][27][28][29]. However, the use of Au-Pd for improving photocatalysis in wastewater treatment has been researched little.…”

Nanocolloidal Pd‐Au as Catalyst for the Direct Synthesis of Hydrogen Peroxide from H2 and O2

“…In addition, the particle size is an important factor to consider and high selectivity was achieved at an average particle size of 18 nm. [14] However, in the case of using a supported metal catalyst, the particle size has a wide distribution and the effect of particle size on the selectivity is not clearly apparent. As a sharp particle size distribution is expected for a metal colloid, we investigated and report here the catalytic activity of a sizecontrolled Pd-Au nanocolloid for the direct synthesis of H 2 O 2 from H 2 and O 2 .…”