4.7 Article

Optimized oxygen reduction activity by tuning shell component in Pd@Pt-based core-shell electrocatalysts

期刊

JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 604, 期 -, 页码 301-309

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.06.136

关键词

Versatile co-reduction synthesis; PdPtNi; Core-shell; Electrocatalyst; Oxygen reduction reaction

资金

  1. National Natural Science Foundation of China [21975151, 22072151, 51701201]
  2. Natural Science Basic Research Plan in Shaanxi Province of China [2019JM-086]
  3. Fundamental Research Funds for the Central Universities [1301030001, 2018TS062]
  4. DNL Cooperation Fund, CAS [DNL201903]

向作者/读者索取更多资源

In this study, Pd@Pt-based core-shell nanoparticles were successfully synthesized using a versatile co-reduction method, with the ability to effectively tune the shell component and improve the oxygen reduction reaction (ORR) activity. By incorporating a third metal into the shell layer, the activity of the catalysts was significantly enhanced, showing lower activity decay after cycling compared to the catalyst without the third metal.
Combining the interests of core-shell and alloy structures, herein we report the versatile co-reduction synthesis of Pd@Pt-based core-shell nanoparticles. The current strategy can effectively tune the component of shell, from isolated Pt to binary PtNi alloy, then ternary PtNi-M (M = Fe or Cu) alloy. Further, significant improvement of oxygen reduction reaction (ORR) activity is optimized by the change in shell component. Compared to Pd@Pt/C, Pd@PtNi/C catalyst presents the ORR-helpful mass activity of 1.29 A mg(Pt)(-1). By incorporating a third metal (M) into shell layer, the optimized mass activity of Pd@PtNiFe/C and Pd@PtNiCu/C catalysts is 1.1 times and 1.4 times higher than that of Pd@PtNi/C, respectively. Meanwhile, the lower activity decays of 11.0% for Pd@PtNiFe/C and 10.6% for Pd@PtNiCu/C are obtained compared with that of Pd@PtNi/C (12.4%) after 5,000 cycles, respectively. (C) 2021 Elsevier Inc. All rights reserved.

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