| 报告题目 | Efficient photoelectrodes for solar water splitting |
| 报告人 | 罗文俊 教授 |
| 报告人单位 | 南京大学物理学院 |
| 报告时间 | 2014-07-11 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室 |
| 主办单位 | 合肥微尺度物质科学国家实验室 |
| 报告介绍 | 报告摘要：
The consumption of fossil fuels creates energy shortage and serious environment issues, which limits sustainable development of the society. Solar energy is the most abundant renewable energy in the world. However, it needs to be stored as chemical energy due to its low energy density, uneven distribution and discontinuous radiation. Hydrogen is considered as a promising clean energy carrier for the future. In a photoelectrochemical water splitting cell, a Schottky-like junction forms at the solid-electrolyte interface and separates photo-generated carriers. Since Fujishima and Honda originally reported that a TiO2 based photoelectrochemical cell could split water into hydrogen and oxygen in 1972, intensive researches have been done to improve the performance of the photoelectrochemical cell in the past forty years. However, the solar energy conversion efficiency is still low. Exploring efficient photoelectrodes is a key challenge in solar water splitting for hydrogen production.
In this talk, I will present several kinds of methods to improve a photoelectrode’s performance, including heterojunction, shallow level doping, removal of surface recombination centers, morphology control and suppressing back reaction. After modifying, we have obtained record solar photocurrent on BiVO4 and Ta3N5 photoelectrodes for water splitting. Moreover, we have used the BiVO4 photoelectrode to split natural seawater outdoors, which is more attractive because solar energy and seawater are the most abundant renewable energy source and the most abundant natural resource on the earth, respectively. Our findings are important progress in this field and offer guidance to improve photoelectrochemical performance of other materials.
报告人简介：
罗文俊，南京大学物理学院副研究员。2003年南京大学大气科学系本科毕业，2008年获南京大学材料科学与工程系博士学位。攻读博士学位期间，2005年9月至2006年3月赴日本国家物质材料研究所参与联合培养。2008-2011年为南京大学博士后, 2011年12月任南京大学物理学院副研究员。长期从事高效半导体光电化学太阳能分解水制氢研究，取得了一系列重要成果，主要包括：首次在户外实现高效稳定光电化学太阳能分解天然海水制氢；通过消除表面复合中心使Ta3N5光阳极太阳能分解水光电流达到当时报道的世界最高值；对半导体光电化学分解水中涉及的基本物理和化学过程取得一系列新认识。迄今为止，已在Angew. Chem. Int. Ed.(内封面文章)、Energy Environ. Sci.、Adv. Energy Mater.、Adv. Funct. Mater.、J. Phys. Chem. C.、Phys. Chem. Chem. Phys.、Electrochem. Comm.、J. Mater. Chem. A、Appl. Phys. Lett.等国际著名SCI期刊上发表论文36篇，其中，第一作者或通讯作者17篇。成为J. Am. Chem. Soc.和Angew. Chem. Int. Ed.等顶级杂志审稿人。申请了中国发明专利5项，授权3项。主持了1项国家自然科学青年基金，参与了2项973项目的研究。荣获了2012年度江苏省科学技术一等奖(第四完成人)。 |
