期刊
NEW JOURNAL OF CHEMISTRY
卷 44, 期 11, 页码 4604-4612出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nj06259a
关键词
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资金
- National Natural Science Foundation of China [21561019]
- program of Changjiang Scholars and Innovative Research Team in University [IRT_15R56]
Recently, great effort has been made to improve the activity and stability, as well as increase the utilization efficiency of noble metal-based electrocatalysts. Herein, a dealloyed PtPd-based nanoparticle (PtPd-x/C, x = 0, 2, 4, 6, 8, 10), with a small amount of Fe inside, is obtained by etching a high-Fe-content PtPdFe nanoparticle precursor. The final PtPd-x/C having a large amount of PtPd exposed on the surface can effectively increase the utilization efficiency of the mass-based unit precious-metal to facilitate glycerol electrooxidation. Attractively, the optimal PtPd-6/C not only exhibits higher electrochemically active surface area (113.33 cm(2) mg(PtPd)(-1)), oxidation peak current (0.86 A mg(PtPd)(-1)) and stability (0.48 A mg(PtPd)(-1) after 3000 s and 5.8% current decreases after 400 cycles), but also shows excellent CO tolerance compared to others. This work demonstrates that the design of a multi-component noble metal composite is a feasible way to obtain some efficient electrocatalysts.
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