Séminaire Zongyou Yin (The Australian National University, Canberra, ACT Australia)

Mardi 27 novembre 2018 à 14h00

Ecole polytechnique - Salle réunion du LSI - bat 83-2034

Surface Science and Engineering on Nanomaterials for The Applications in Water Splitting and Electronics

Nano science and technology offer a vast and fascinating playground to explore the novel physiochemical properties of nanomaterials with the development for various applications including energy conversion and electronics. In this talk, I will present the recent investigation on the surface chemistry and physics and their effects on the nanoscale electro/photo-catalysis and diamond-based surface charge doping, such as surface molecular tunable crystal phase engineering with two-dimensional (2D) WS₂ towards stable electrocatalytic hydrogen evolution reaction, surface oxygen vacancies from MgO porous nanoparticles for stable photocatalytic water splitting with gold’s local plasmonic further enhancement; and hydrogenated MoO₃ layer as a novel efficient sustainable surface charge acceptor for diamond transistors. These surface science and engineering enable the enhancement of functional efficiency and the extension of performance stability in electro/photo-catalysis and electronics. This talk highlights the synergistic surface science and engineering can provide the opportunities to customize nanomaterials for advanced applications development

Figure 1. Colloidal Synthesis of 1T’-WS2 for stable electrocatalytic hydrogen evolution

Figure 2. Monodispersed MgO porous nanocrystals for photodecomposition of methanol to CO_x-free H₂ fuel production

Figure 3. Electron Energy Loss Spectroscopy (EELS) measurements of plasmon resonances of Au-MgO nanostructure to be applied for water splitting

References
[1] Z. Liu, et. al., Nano Energy, 50 (2018), pp. 176-181.
[2] Z. Liu, et. al., Sci. Adv., 2 (2016), e1501425.
[3] Z. Liu, et. al., 2018 under submission.