Plasma-induced alloying as a green technology for synthesizing three-component nanoparticles with an early transition metal

Title
Plasma-induced alloying as a green technology for synthesizing three-component nanoparticles with an early transition metal
Authors
유성종박희영이세현장인준이동욱이응준최백범함형철
Issue Date
2021-12
Publisher
NANO TODAY
Citation
VOL 41, 101316
Abstract
The strategy of employing Pt alloys with other transition metals (TMs) is advantageous owing to the enhancement of the oxygen reduction reaction (ORR) activity and the reduction of Pt usage. The ternary alloy system with early TMs can overcome stability issues and even enhance the intrinsic activity of the catalysts owing to rearrangement of electronic structures between three metal elements. Herein, efficient catalysts with V―an early TM―were successfully obtained via a plasma-induced alloying strategy. The effect of V in the PtCoV/C catalyst, which exhibits the highest ORR activity among the synthesized Pt?TM?V (TM = Co, Ni, Cu) catalysts, was determined. The addition of V induces electron rearrangement in PtCoV, inhibiting the oxidation of Co and V and optimizing the oxygen-binding energy of Pt. Thus, incorporation of V into PtCoV nanoparticles enhances the electrochemical ORR activity and stability. The catalytic performance of PtCoV achieved 966 mV of half-wave potential, 3.05 A/ of mass activity, and 8.58?mA/ of specific activity. This systemic strategy not only proposes a novel and facile approach for the synthesis of ternary alloy catalysts but also reveals the intricacies of the catalytic activity, allowing the application of ternary alloy electrocatalysts.
URI
http://pubs.kist.re.kr/handle/201004/74103
ISSN
1748-0132
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KIST Publication > Article
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