报告人：新加坡南洋理工大学 刘彬教授

报告题目：Identification of Catalytically Active Sites in Carbon-based Catalysts for Electrochemical CO₂ Reduction

报告地点：深圳大学沧海校区致腾楼（计算机软件大楼）223会议室

报告时间：2020年1月3日下午14:00~16:30

主持人：苏陈良 教授

报告内容简介：

Designing effective electrocatalysts for the carbon dioxide (CO₂) reduction reaction (CRR) is an appealing approach to tackling the challenge posed by rising CO₂ levels and realizing a closed carbon cycle. However, CO₂electrocatalysis still lacks a fundamental understanding owing to the complicated CRR mechanism and lack of model study systems. Herein, we have designed a model single-nickel-atom catalyst with a uniform structure and well-defined Ni-N₄moiety on a conductive carbon support to explore the electrochemical CRR. Based on operando X-ray absorption near-edge structure spectroscopy, Raman spectroscopy and near atmospheric X-ray photoelectron spectroscopy investigations, Ni⁺ in the single-nickel-atom catalyst resulting from in situ Ni²⁺ reduction was found to be highly active for CO₂ activation, acting as an authentic catalytically active site for the CRR. Furthermore, through combination with a kinetics study, the rate-determining step of the CRR was determined to be *CO₂^- + H⁺ → *COOH. This study tackles the four challenges faced by the CRR, namely, activity, selectivity, stability, and dynamics.

报告人简介：

Bin Liu received his B.Eng. (1^st Class Honors) and M.Eng. degrees in Chemical Engineering from the National University of Singapore, and obtained his Ph.D. degree in Chemical Engineering from University of Minnesota in 2011. Thereafter, he moved to University of California, Berkeley and worked as a postdoctoral researcher in Department of Chemistry during 2011–2012 before joining School of Chemical and Biomedical Engineering at Nanyang Technological University as an Assistant Professor in 2012. He is now an Associate Professor at NTU. His main research interests are electrocatalysis, photovoltaics and photoelectrochemistry. He has published more than 150 SCI papers with 15000 total citations and the h-index is 50. More information can be found at http://www.ntu.edu.sg/home/liubin/home.html.