Earth-abundant nanostructures for efficient water splitting

Speaker: Prof.Lawrence Yoon Suk Lee(The Hong Kong Polytechnic University)

Date & Time: 2020. 2. 6.(목), 16:30-17:30

Where: 융대원 D-122호

Abstract

Driven by the growing needs for clean and sustainable energy source, a number of energy conversion technologies have been extensively explored over recent years, including water splitting, fuel cell, and metal ion batteries. In particular, water splitting reaction, consisting of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), is considered as a promising and efficient way to produce clean energy carrier, hydrogen, to meet the energy demands. So far, most efficient catalysts developed for both HER and OER make use of noble metals, which largely hinders their wide application due to high cost and limited availability.
Semiconductors based on earth-abundant elements offer an economically-viable platform for photocatalytic and electrocatalytic chemical and energy conversions. However, many of photocatalysts have suffered from the limited light absorption due to their wide band gap energy, fast charge recombination rate, and/or inadequate band structure for target reactions. Electrocatalysts also lacks behind the noble-metal based ones in terms of efficiency and stability. In this talk, the strategies we develop to overcome these drawbacks will be presented. Special focus will be made to the case of metal-organic frameworks with the detailed characterization of the active species and stability.

 

초청자 : 융합과학부 나노융합전공 박원철 교수(연락처 : 031-888-9141, parkat9@snu.ac.kr)

2020-01-16|