主讲人：Prof. Chengzhong Yu
时间：9月28日下午16:00
地点：丽湖校区科研楼东座312会议室
报告人简介：
Professor Yu Chengzhong’s research focuses on functional material innovation and applications in drug delivery, sustainability and energy storage applications. He has published over 400 peer-reviewed journal articles, which have been cited over 42,400 times and resulted in an H-index of 108 (Google Scholar). He has received awards including the National Health and Medical Research Council's (NHMRC) Investigator Fellowship (Level 3), and the Le Févre Memorial Prize from the Australian Academy of Science. He is the Associate Editor of J. Mater. Chem. B and Materials Advances.
讲座摘要：
With increasing population and demand for quality food, sustainable and environmentally friendly technologies are much needed. Seawater accounts for >96% of the Earth's water and hosts abundant natural resources. However, the direct use of seawater as the electrolyte for producing hydrogen peroxide, an important chemical and sterilizing agent used in agriculture, remains challenging. As another example, marine aquaculture is projected to supply 30 million tons of edible food by 2050.[1] Nevertheless, the extensive use of nutrients and fertilizers in aquaculture activities has led to elevated emission of pollutants such as nitrate (NO3−, up to 150 mg-N L⁻1), causing biodiversity reduction and substantial economic losses.
In this talk, I will present our progresses using innovative nanomaterials to enable the production of hydrogen peroxide,2 the conversion of nitrate into ammonia and urea for aquaculture applications,3 all in seawater. Firstly, I will introduce NiPS3 nanosheets as a high-performance electrocatalyst for hydrogen peroxide production in seawater, delivering a selectivity of ∼98%, a yield of 6.0 mol gcat–1 h–1 and stability for over 1000 h in simulated seawater. The established seawater electrocatalysis system enables scalable preparation of solid H2O2 and direct use of the produced H2O2 as a sterilizing agent. Secondly, I will present the rational design of MPX3 nanosheets as an efficient and robust electrocatalyst to achieve the conversion of NO3− to NH4+ in seawater. Thirdly, I will showcase how to design MPX3 nanosheets that enable efficient conversion of carbon dioxide and nitrate into urea in seawater. Our findings provide a versatile platform for the development of seawater-focused environmentally friendly technologies. Last but not the least, our research in nanoporous materials and their biomedical applications will be briefly introduced to promote broad collaboration.
Keywords：Nanomaterial, electrocatalyst, hydrogen peroxide, ammonia, urea.
References
[1] Naylor, R. L.; Hardy, R. W.; Buschmann, A. H.; Bush, S. R.; Cao, L.; Klinger, D. H.; Little, D. C.; Lubchenco, J.; Shumway, S. E.; Troell, M. Nature 2021, 591, 551-563.
[2] Zhang, C. Q.; Shan, P. Y.; Zou, Y. Y.; Bao, T.; Zhang, X. C.; Li, Z. J.; Wang, Y. Y.; Wei, G. F.; Liu, C.; Yu, C. Z. Nat. Sustain. 2025, 2025, 8(5), 542-552.
[3] Li, Z. J., Liu, C.; Yu, C. Z. et al., under review.
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