2018年11月17日南洋理工大學範紅金教授學術報告會

報告題目：Nano Array Electrocatalysts: Doping Engineering and Plasma-Assisted Surface Functionalization

報告人：Hong Jin Fan（School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore.）

邀請人：王雙印

報告時間：2018年11月17日（星期六）上午9:30

報告地點：新化工樓B106

範紅金，1999年吉林大學物理系學士，2003年新加坡國立大學物理系博士，其後分别在德國馬普研究所和英國劍橋大學從事博士後，2008年加入南洋理工大學任教至今。

主要研究領域是納米材料在能源中的應用，包括儲能電池材料和電催化，少量染指低維半導體的發光現象。 目前，發表文章200多篇，其中39篇被标定為“ISI 高引論文”， H因子為72。2016 - 2018 連續三年被web of science評為材料類“高被引”作者。英國皇家化學會會員 （FSRC）。擔任10個國際期刊編委成員。

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 electrocatalyst materials for HER and OER applications, because of their tailorable electronic structure, conductivity, and surface chemistry. Our group has been actively working on nanoarray materials directly grown 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.