期刊
ADVANCED SCIENCE
卷 8, 期 22, 页码 -出版社
WILEY
DOI: 10.1002/advs.202102207
关键词
2D materials; electrocatalysts; HF-free MXene; nanoparticles; reactive metal-support interaction
资金
- Research Grants Council of Hong Kong GRF [15301020]
This study introduces a novel strategy to grow Pt quantum dots on MXene under atomic-level modulation reaction, forming efficient Pt (111) QDs 0D/1D heterostructure catalyst.
Supported metallic nanoparticles render highly tunable physical and chemical properties to mixed-dimensionality materials in electrocatalysts. However, some supports are susceptible to being dissolved in acidic solution or are unstable in ambient air. The development of high-performance catalysts has been facing the major hurdles of the sluggish activity in alkaline solution and requesting high energy to stabilize the nanoparticles on their supports, challenging the pH-universality and the applicability of the supported metallic nanoparticles. Here, a one-step strategy is proposed to modulate the growth of Pt quantum dots (QDs) on HF-free MXene under atomic-level by a low-temperature metal-support interaction reaction. By controllable tailoring in the morphology and strain induced by terminations, Pt (111) QDs with a sub-nanoscale size of 1.15 nm are grown as 0D/1D heterostructure to overcome the restrictions of employing reduction gas and high annealing temperature. The catalyst exhibits a low overpotential of 33.3 mV for acidic solution, while 65.1 mV for alkaline solution at a specific current density of 10 mA cm(-2). This study not only paves a scalable pathway to developing cost-efficient catalysts in moderate conditions, but also demonstrates an effective surface modulation strategy for 0D/1D heterostructures.
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