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功能纳米与软物质研究院学术报告:Interfaces for efficient electrocatalysis

报告人:龚鸣 博士(加州大学伯克利分校)
报告题目:Interfaces for efficient electrocatalysis
报告时间:10:00 am, May. 18th (Friday)
报告地点:909-B


摘要:
The growing energy demand and diminishing fossil fuel resources requires renewable energy for the sustainability of our earth. However, the spatial and temporal intermittency of most renewable energy resources leads to insufficient energy supply and needs novel energy storage techniques when surplus. In this talk, we will talk about two strategies for electrochemical energy conversion. The first part focuses on water electrolysis, which is a promising way of producing hydrogen fuels with zero-emissions. Towards efficient water splitting, active and durable electrocatalysts with earth-abundant materials for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are highly desired. We designed an advanced NiFe layered double hydroxide (NiFe LDH) structure with excellent OER activity/stability and a novel NiO/Ni heterostructure on carbon nanotube (NiO/Ni-CNT) with comparable HER activity to Pt-based benchmark. An alkaline electrolyzer pairing up NiFe LDH OER catalyst and NiO/Ni-CNT HER catalyst could yield ~20 mA/cm2 at a voltage of 1.5 V and ~100 mA/cm2 at a voltage of 1.58 V under room temperature (23oC). The second part discusses about the effort of designing molecular-functionalized materials for converting carbon-based resources into value-added products. Interfacing molecular catalysts with material catalysts can take the advantages from both sides, generating a novel class of electrocatalysts for energy conversion. The designed catalyst consisting of Cu surfaces functionalized with porphyrin cages were capable of efficiently catalyzing carbon monoxide (CO) into C2 oxygenates (e.g. acetate and ethanol). The tentatively proposed mechanism will also be discussed.

简历:
龚鸣博士2011年本科毕业于清华大学大学化学系(导师:李亚栋),2016年博士毕业于斯坦福大学化学系(导师:戴宏杰),2017至今在加州大学伯克利分校化学系从事博士后研究(合作导师:Christopher Chang)。龚鸣博士从事纳米电催化与能源存储等领域相关研究,在Nature, Science, Nature Comm., J. Am. Chem. Soc., Angew. Chem., Adv. Mater., Engery Environ. Sci.等期刊发表学术论文28篇(其中第一作者或共同第一作者文章13篇),总引用4564 (Google scholar), H-index为20,美国发明专利6项(其中4项已授权)。

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