Royal Society of Chemistry;Royal Society of Chemistry (RSC)
摘要:
摘要： In this study, we have investigated the effect of alloying on the modification of the d-band vacancies and oxygen reduction reaction (ORR) activity of PtPd and PtCu nanorods (NRs). PtCu and PtPd NRs with various ratios can be prepared successfully by a facile formic acid reduction method. The number of unfilled d-states ( H Ts ) value of Pt nanoparticles is decreased due to the formation of NRs, and further decreased due to the alloying with different metals. For the Pt3Pd NRs, the H Ts value is as low as 0.3056, suggesting that they have lower unfilled Pt d-states, and more d-band electrons transfer from Pd to Pt, leading to higher ORR activities than Pt/C. Besides, the electron transfer number ( n ) of Pt3Pd NRs towards the ORR is 3.7, meaning that they complete the O 2 reduction to water and exhibit low hydrogen peroxide production during the ORR. As a result, the correlation between the H Ts and ORR performance of PtPd and PtCu NRs highlights that the one-dimensional (1-D) structure and the electronic modification effect from Pd to Pt result in the excellent ORR activity and durability of Pt3Pd NRs synergistically. 出版者： Royal Society of Chemistry (RSC) 出版日期： 2014-01-01 出處： J. Mater. Chem. A, 2014-01, Vol.2 (12), p.4270-4275 資源來源： Royal Society of Chemistry 識別號： ISSN: 2050-7488 識別號： ISSN: 2050-7496 識別號： EISSN: 2050-7496 識別號： DOI: 10.1039/c3ta14705c
