Keynote Speaker
2023 Okinawa International Academic Joint Conferences
7 / 26-7 / 28, 2023at Okinawa Convention Center
Dr. Kwun Nam Hui received his B.Sc. degree in physics from the Hong Kong University of Science and Technology in 2003. He obtained his M.Phil. (2006) and Ph. D. degree (2009) in Electrical and Electronic Engineering from the University of Hong Kong. He is an Associate Professor at the Institute of Applied Physics and Materials Engineering of the University of Macau. His current research focuses on the design and synthesis of nanostructured materials for electrochemical energy storage and conversion, including batteries, supercapacitors, and fuel cells. He has published more than 240 journal articles with a citation over 10000 times and an h-index of 57 (Goolge Scholar).
Design of Electrocatalysts and Their Potential Applications in Metal-air Batteries
Kwun Nam Hui
Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Macau
Highly effective electrocatalysts are significant for the development of sustainable and renewable energy storage and conversion for net-zero carbon society. To date, designing and synthesizing low-cost, highly efficient, and stable electrocatalysts for practical applications in sustainable energy storage and conversion has been an imperative yet challenging subject. Numerous efforts and progress have been dedicated to exploring efficient non-noble catalysts based on earth-abundant elements, such as transition metal phosphates, oxides, hydroxides, chalcogenides, carbides, and phosphides, among others. Unfortunately, most transition metal-based catalysts have inadequate intrinsic activities compared with noble metal materials because of their relatively low conductivity and unsuitable electron structure.
In this talk, several strategies, including morphology control, heterostructure architecture, and defect engineering, will be discussed to regulate the intrinsic electronic structures of transition-metal-based catalysts to achieve high electron conductivity of the electrocatalysts and reduce binding energies of the reaction intermediates towards rate-determining steps of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Experimental analyses and theoretical calculations reveal that the electronic structure of electrocatalysts can be efficiently modulated by introducing dopants as defects and incorporating metal nanoparticles on substrate-support, which synergistically improves oxygen intermediates adsorption/desorption, enhancing the ORR and OER performance. Finally, the potential applications of electrocatalysts in metal-air batteries will be discussed.

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Important Dates
Submission Deadline
April 25 / 2023Still Open
Notification of Acceptance
May 15 / 2023
Early Bird Registration Deadline
May 31 / 2023
Registration Deadline
June 10 / 2023
Conference Dates
July 26 - 28, 2023
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