报 告 人：张华 教授，香港城市大学

报告时间：2024年10月22日（周二）15:30-17:00

主 持 人：江河清 研究员

报告地点：王哥庄园区行政楼323会议室

报告人简介：

He has published 8 invited book chapters, over 100 patent applications (including granted 1 China patent, 1 European patent, 3 Singapore patents, and 10 US patents), and over 500 papers. Some of his papers have been published in Nature (1), Science (1), Nat. Mater. (4), Nat. Chem. (5), Nat. Catal. (2), Nat. Rev. Mater. (2), Nat. Rev. Chem. (1), Nat. Commun. (13), Sci. Adv. (2), Nat. Protocols (1), Chem. Rev. (5), Chem. Soc. Rev. (16), Acc. Chem. Res. (4), Acc. Mater. Res. (1), J. Am. Chem. Soc. (30), Angew. Chem. Int. Ed. (29), Adv. Mater. (74), Energy Environ. Sci (12), Mater. Today (1), Adv. Energy Mater. (9), Chem (3), Natl. Sci. Rev. (4), ACS Nano (33), Nano Lett. (17), Adv. Funct. Mater. (6), Nano Energy (6), Energy Storage Mater. (1), ACS Catal. (1), Small (70), Small Methods (3), Nano-Micro Lett. (1), Mater. Horizons (2), Biomater. (1), Biosens. Bioelectron. (2), J. Mater. Chem. A (4), Matter (2), NPG Asia Mater. (1), J. Hazard. Mater. (1), Nanoscale Horizons (2), Appl. Mater. Today (1), J. Mater. Chem. (9), etc. As at Sept. 2024, the total cited times are over 133,100 with H-index of 181 (Web of Science), and over 151,000 with H-index of 193 (Google Scholar). He has been invited to give more than 300 Plenary, Keynote or Invited Talks in international conferences, universities and institutes. He has organized several tens of international conferences and served as the Conference (Co-)Chair or Symposium Chair.

报告摘要：

In this talk, I will summarize the recent research on phase engineering of nanomaterials (PEN) in my group, particularly focusing on the rational design and synthesis of novel nanomaterials with unconventional phases for various promising applications. For example, by using wet-chemical methods, for the first time, we have successfully prepared novel Au nanostructures (e.g., the hexagonal-close packed (hcp) 2H-Au nanosheets, 4H-Au nanoribbons, and crystal-phase heterostructured 4H/fcc and fcc/2H/fcc heterophase Au nanorods), epitaxially grown metal nanostructures on the aforementioned unconventional Au nanostructures and 2H-Pd nanoparticles, and amorphous/crystalline heterophase Pd, PdCu, Rh and Rh alloy nanosheets. By using gas-solid reactions, metastable 1T'-phase group VI transition metal dichalcogenides (TMDs), e.g., WS₂, WSe₂, MoS₂, MoSe₂, WS₂xSe_2(1-x) and MoS₂xSe_2(1-x), have been prepared. Impressively, the 1T'-MoS₂-supported single-atomically dispersed Pt (s-Pt) atoms with Pt loading up to 10 wt% exhibit superior performance in hydrogen evolution reaction. Importantly, 1T'-TMD monolayers can be stabilized on 4H-Au nanowires, which can be used for ultrasensitive SERS detection Moreover, the salt-assisted 2H-to-1T' phase transformation of TMDs have been achieved, and the phase transformation of TMDs during our developed electrochemical Li-intercalation process has been observed. Impressively, the lithiation-induced amorphization of Pd₃P₂S₈ has been achieved. Currently, my group focuses on the investigation of phase-dependent physicochemical properties and applications in catalysis, (opto-)electronic devices, clean energy, chemical and biosensors, surface enhanced Raman scattering, photothermal therapy, etc., which we believe is quite unique and very important not only in fundamental studies, but also in future practical applications. Importantly, the concepts of phase engineering of nanomaterials (PEN), crystal-phase heterostructures, and heterophase nanomaterials are proposed.

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