报告人：Hong Jin Fan (School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore)
报告题目：Design and Tailoring Bimetallic Nanostructured Electrocatalysts
报告时间：2：00 pm, November 27th
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, electric conductivity, and surface chemistry. Our group has been actively working on nanoarray materials directly on conductive substrates as electrodes for both supercapacitor, batteries as well as electrocatalyst.
In this talk, I will present two results: (1) RF nitrogen and carbon plasma as a highly effective technique for conversion reaction and surface functionalization of nanostructured electrodes. The plasma treatment not only generates hierarchical nanostructure surface, but also induces N-doping as well as hydrophilicity. This is a fast and NH3-free strategy to synthesize metal nitrides for wide applications in electrocatalysts, supercapacitors and batteries. (2) Atomic epitaxial grown Co-Ni3N nanowires array with a nanoconfinement effect at the interface. We attest by first-principle calculations that the nanoconfinement effect facilitates electron transfer at the epitaxial interface, leading to a significant enhancement in catalytic activities for both HER and OER.
Dr. Fan is currently an associate professor at Nanyang Technological University (NTU). He received PhD from National University of Singapore in 2003, followed by postdoc at Max-Planck-Institute of Microstructure Physics, Germany and University of Cambridge. He joined NTU as Nanyang Assistant Professor in 2018. He is an editorial board member of Nanotechnology, Materials Today Nano, advisory board member of Advanced Science, Advanced Materials Interface, and Advanced Materials Technologies, and Associate Editor of Materials Research Bulletin. Dr. Fan has chaired or co-chaired several international major conferences including MRS in US and ICMAT in Singapore. Dr. Fan’s research interests include semiconductor nanowires and related heterostructures, energy conversion and storage applications of nanomaterials (including photolysis and electrolysis of water, batteries) and optical properties of low-dimensional heterostructures. He has authored or co-authored 190 journal articles with an H-index of 63.