题 目：Electrocatalytic and Photoelectrochemical Water Splitting Using Highly Active Earth-Abundant Electrocatalysts
报告人：Song Jin (金松)  教授
单 位：University of Wisconsin-Madison, USA 
时 间：2018/1/10　10:20 AM
地 点：2号楼228会议室
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简介：
Prof. Song Jin received his B.S. in Chemistry from Peking University in 1997, Ph.D. in 2002 from Cornell University under the direction of Prof. Francis J. DiSalvo and carried out his postdoctoral research under the direction of Prof. Charles M. Lieber at Harvard University. Dr. Jin is interested in the chemistry and physics of nanoscale materials and solid state materials. Dr. Jin developed innovative synthesis of a variety of nanomaterials including metal silicides, oxides, chalcogenides, and halide perovskites, and discovered and developed the screw dislocation-driven growth of anisotropic nanomaterials. Building on the fundamental understanding of novel physical properties, Jin advances the exploitation of (nano)materials for photovoltaic and photoelectrochemical solar energy conversion, electrocatalysis, energy storage, optoelectronics, nanospintronics, and biotechnology. The unifying theme of Jin’s energy research is the focus on earth-abundant materials. Dr. Jin has authored or co-authored over 170 publications and 6 patents. He has been recognized with a NSF CAREER Award, a Research Corporation Cottrell Scholar Award and as one of world’s top 35 innovators under the age of 35 (TR35 Award) by the MIT Technology Review Magazine, the ACS ExxonMobil Solid State Chemistry Fellowship, and the Alfred P. Sloan Research Fellowship, Research Corporation SciaLog Award for Solar Energy Conversion, U. of Wisconsin-Madison Vilas Associate Award and H. I. Romnes Faculty Fellowship, and the ACS Inorganic Nanoscience Award. He recently became a Senior Editor for ACS Energy Letters. 
    The scale of renewable energy challenges not only calls for highly efficient photovoltaic (PV) or photoelectrochemical (PEC) technologies but also abundant, inexpensive, and robust materials. Earth-abundant but highly active electrocatalysts need to be discovered to enable the most efficient and sustainable production of energy using electrocatalytic and PEC water splitting. We report nanostructures of several new earth-abundant electrocatalysts, such as exfoliated nanosheets of MoS₂, WS₂, MoSe₂, for the hydrogen evolution reaction (HER) and significantly enhanced their catalytic activity. We established nanotructures of ternary pyrite-type cobalt phosphosulfide (CoPS) as the best earth-abundant HER catalyst in acidic conditions to date that does not contain expensive noble metals. For oxygen evolution reaction (OER), NiCo and NiFe layered double hydroxides (LDHs) have been exfoliated into high surface area nanosheets to enhance their catalytic activity. We have studied their catalytic mechanism and further explored and discovered trimetallic NiFeCr LDH materials with more enhanced catalytic activity. These earth-abundant catalysts have been integrated with silicon and other semiconductors to enable the efficient solar-driven hydrogen generation devices using earth-abundant materials.  Furthermore, we have developed a novel type of hybrid energy conversion and storage devices by integrating regenerative solar cells with redox flow batteries (RFBs) using the same redox couples as a potentially more practical near term alternative to PEC water splitting.