报告题目：Nano Array Electrocatalysts:Doping Engineering and Plasma-Assisted Surface Functionalization
报告人：Hong Jin Fan（School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore.）
主要研究领域是纳米材料在能源中的应用，包括储能电池材料和电催化，少量染指低维半导体的发光现象。 目前，发表文章200多篇，其中39篇被标定为“ISI高引论文”，H因子为72。2016 - 2018连续三年被web of science评为材料类“高被引”编辑。英国皇家化学会会员 （FSRC）。担任10个国际期刊编委成员。头无金冠，手无荣奖。
Water electrolysis, fuel cells, and metal-air batteries all require efficient and cheap electrocatalysts that can significantly lower the overpotentials. Bimetallic alloys and their oxides or nitrides compounds are particularly interesting as non-precious metal electrocatalystmaterials for HER and OER applications, because of their tailorable electronic structure, conductivity, and surface chemistry. Our group has been actively working onnanoarray materials directlygrown on conductive substrates as electrodes for supercapacitor, batteries and electrocatalyst.
In this talk, I will present two main results about surface and interface engineering/functionalization of electrocatalysts:(1)RF nitrogen and carbon plasma as a highly effective technique for conversion reaction and surface functionalization of nanostructured electrocatalysts.The N plasma treatment not only generates hierarchical nanostructure surface, but also induces N doping as well as hydrophilicity. Using C-plasma, we can not only reduce the metal oxide surface, but also deposit a thin and uniform carbon coating. In addition, in the presence of metal catalyst, it can also generate vertical graphene nanosheets directly on electrode materials. (2) We demonstrate that dual cation doping, or cation-anion co-doping in nanoarray electrode materials can simultaneously modulate increase active sites exposure, and regulate water dissociation and hydrogen adsorption free energy). As a consequence, the dopings lead to a significant enhancement in catalytic activities for both HER and OER.