Pt decorated PdAu/C nanocatalysts with ultralow Pt loading for formic acid electrooxidation

Pd-Au/C catalysts with different alloying degrees for ethanol oxidation in alkaline media

“…The low alloyed Pd-Au/C-L catalyst was synthesized because the reducing agent was added dropwise to the metallic ion solutions in excess, which creates a synthesis environment for faster deposition of Au than Pd due to the higher reduction potential of Au ions than that of Pd ions (0.591 V for PdCl 4 2À /Pd vs. 1.0 V for AuCl 4 À /Au) [16,18] and thus leads to a Pd-rich shell/Au-rich core structure. On the other hand, the environment of a limited supply of Pd and Au precursors (supplied in drop-by-drop) and an abundant reducing reagents at high temperature, as in the rate-limiting strategy, accelerates the reduction rates of both Pd and Au ions and drives the synthesis process to be controlled by the mass transport of Pd and Au precursors.…”

Pt-Pd nanoelectrocatalyst of ultralow Pt content for the oxidation of formic acid: Towards tuning the reaction pathway

“…18,19 The use of large amount of Pt actually increases the overall cost of the fuel cell and hence several efforts have been taken to minimize the amount of Pt content without compromising the electrocatalytic performance. 20 The electrochemical route for the synthesis of nanoscale materials is a versatile approach. Both spatial and size control can be easily achieved by the fine tuning of electrochemical parameters.…”

Highly active carbon supported palladium catalysts decorated by a trace amount of platinum by an in-situ galvanic displacement reaction for formic acid oxidation

“…Usage of NaBH 4 to prepare Pd/C in this work might lead to the formation of isolated Pt islands in the following step due to the possible existence of NaBH 4 residue. Chen et al prepared Pt decorated PdAu/C nanocatalysts via a spontaneous displacement reaction in toluene and they found PtePdAu/C catalyst with Pt:Pd ¼ 1:100 exhibited enhanced activity [7]. In this work, we synthesized Pd/C catalysts by a modified citrate reduction method developed in our lab recently [21], then an in-situ galvanic displacement reaction between the as-prepared Pd/C ink and H 2 PtCl 6 produced Pt 1 @Pd x /C catalysts.…”