Abstract
Developing a highly efficient and robust poison tolerance catalyst for oxygen reduction reaction (ORR) is significantly critical for sustainable energy convert systems. Herein, an interfacial engineered PdRu/C is prepared by reduction of silicon-hydrogen bonds. The interface between Pd and Ru is beneficial for exposing the active site, enhancing charge transfer and adjusting the adsorption energy barrier, resulting in the excellent ORR performances. Compared with commercial Pt/C (0.84 V) and commercial Pd/C (0.84 V), the optimal Pd_9Ru_1/C demonstrates high electrocatalytic activity with half-wave potential up of 0.86 V in 0.1 M KOH solution. Meanwhile, the experimental results indicate that bimetallic interface engineering can greatly enhance toxicity resistance to various poisons, including CO, methanol, NO_x, SO_x and PO_x. When they are applied to zinc-air battery as an air cathode, the battery exhibits an open circuit voltage of 1.48 V. Interestingly, the power density reaches up to 240 mW cm~(-2), which is superior to those of commercial Pt/C (219 mW cm~(-2)) and commercial Pd/C (128 mW cm~(-2)). This work opens up an effective strategy to conceive interfacial hybrid for electrocatalysis.
NSTL
Elsevier