DEFECTS-RICH Ru NANOPLATE DRIVED HIGHLY DISPERSED Pt ATOMS TO BOOST HYDROGEN EVOLUTION REACTION

Wang Qiansen; Cheng Qingqing; Li Jun; Yang Hui

doi:10.19912/j.0254-0096.tynxb.2023-0318

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (9) : 14-19. DOI: 10.19912/j.0254-0096.tynxb.2023-0318

DEFECTS-RICH Ru NANOPLATE DRIVED HIGHLY DISPERSED Pt ATOMS TO BOOST HYDROGEN EVOLUTION REACTION

Wang Qiansen^1,2, Cheng Qingqing¹, Li Jun¹, Yang Hui^1,2

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Abstract

Platinum （Pt） is the state-of-the-art electrocatalyst towards hydrogen evolution reaction （HER）,but its atom-utilization efficiency and durability need to be further improved. In this work, we prepared the highly dispersed Pt atoms supported on defects-rich Ru nanoparticles substrate （Ru NPs@Pt） by substrate-enhanced electroless deposition method. The results of single electron paramagnetic resonance confirm the existence of the defects on Ru NPs substrate and the X-ray diffraction combined with transmission electron microscopy reveals the highly dispersed Pt atoms. Exchange current density of HER on the Ru NPs@Pt is up to 2.39 mA/cm², which is significantly higher than that of commercial Pt/C, demonstrating the boosted HER intrinsic activity. Mass activity is as high as 32.34 A/mgPt that is 9.37 times higher than that of Pt/C at an overpotential of 50 mV. Significantly, the Ru NPs@Pt delivers the greatly enhanced durability in comparison with the Pt/C one even under the ultralow Pt loading （2 μg/cm²）, indicating that the defects-rich Ru NPs substrate could improve the electrocatalytic activity and durability of Pt simultaneously.

Key words

electrocatalysis / hydrogen evolution reaction / defect / durability / Pt

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Wang Qiansen, Cheng Qingqing, Li Jun, Yang Hui. DEFECTS-RICH Ru NANOPLATE DRIVED HIGHLY DISPERSED Pt ATOMS TO BOOST HYDROGEN EVOLUTION REACTION[J]. Acta Energiae Solaris Sinica. 2024, 45(9): 14-19 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0318

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