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- W3217072551 endingPage "115908" @default.
- W3217072551 startingPage "115908" @default.
- W3217072551 abstract "Due to the excellent intrinsic activity, platinum-based materials are widely used to produce highly efficient electrocatalysts towards oxygen reduction reactions (ORR), but their ultrahigh price and poor stability severely hinder the mass production and further wide application. Alloying Pt with 3d transition metals through galvanic replacement is an effective way to reduce Pt loading based on the premise of outstanding ORR activity. In this work, to fabricate the optimal precursor for subsequent galvanic replacement, a series of carbon-supported Ni samples were firstly prepared by tuning the Ni loading amount and pyrolysis temperature. Then, the highly dispersed PtNi nanoparticles modified carbon nanohybrid (PtNi/C) with low Pt content of 2.29 wt% can be obtained, which exhibits remarkable and durable ORR activity with E1/2 of 0.841 V vs. RHE via efficient 4e- ORR process in acidic media. Moreover, it should be emphasized that the as-synthesized PtNi/C behaves the impressively high mass activity of 0.57 A/mgPt at 0.8 V, which is 9.4 times that of commercial Pt/C. It is confident that our work can offer constructive suggestions for the design and synthesis of high-performanced electrocatalysts fabricated through galvanic replacement method." @default.
- W3217072551 created "2021-12-06" @default.
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- W3217072551 date "2022-01-01" @default.
- W3217072551 modified "2023-10-13" @default.
- W3217072551 title "Highly dispersed PtNi nanoparticles modified carbon black as high-performanced electrocatalyst for oxygen reduction in acidic medium" @default.
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- W3217072551 doi "https://doi.org/10.1016/j.jelechem.2021.115908" @default.
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