Inspired by the evolution from a three-dimensional cube to a four-dimensional tesseracts, the researchers carried out oxidation etching on the Pd-Pt uniform alloy nanocubes, and obtained a new tesseracts framework structure of Pd-Pt catalyst by precisely adjusting the removal of Pd atoms and the rearrangement of remaining Pd and Pt atoms.
The structure has high surface ratio and high percentage of active sites, which greatly improve the atomic utilization. The mass activities of tesseracts frames is 1.86 A mg-1Pt, being 11.6 times as high as that of commercial Pt/C catalyst.
In addition, the catalyst obtained by oxidation etching maintains extremely high structural stability in the electrochemical testing environment. After 10,000 times of cyclic charging-discharge tests, its performance did not decrease significantly.
This study advances the understanding of the etching mechanism, and provides efficient strategies for the design of novel hollow frame structures for catalysis.
Jane FAN Qiong
52 Sanlihe Rd., Beijing,