Kai Han

Postdoctoral Fellow
Employed since: 15th of February 2019
Email: K.han@uu.nl
Room: 4.88



CO2 emission has been identified as a major cause of global warming. Electrochemical conversion of CO2 and H2O into valuable fuels and chemicals using renewable electricity is a promising way to address the negative impact of CO2 emission, and simultaneously store intermittent energy from renewable sources such as wind and solar. Cu-based catalysts are the most studied electrocatalysts for this process due to its ability to produce more desirable products such as ethylene[1,2]. However, it suffers from low selectivity. Other metal oxides such as ZnOx and MnOx are less studied but are likely to show some activity because they are reducible oxides and have relatively low CO binding energy[1]. Recent studies has shown that the addition of these metal oxides to CuOx improves both the activity and selectivity for the gas phase conversion of CO2 to C1-C4 products. Inspired by this, we aim to investigate supported ZnOx and MnOx nanoparticles as catalysts for electroreduction CO2 and H2O. The specific focus is on the development of novel approaches to prepare supported ZnOx and MnOx nanoparticles and investigating the impact of the physico-chemical properties of the support, and the particle sizes of the metal oxides catalysts on the activity and selectivity. Advanced characterization techniques (including XPS, SEM, EXAFS/XANES, etc.) will be used to evaluate the structural properties and of the catalysts and to obtain information about the reaction mechanisms. For the electrochemistry test, a traditional three-electrodes cell will be used (Fig. 1).

Figure 1. Electrochemical cell for CO2 reduction.

[1] K. P. KuhlT. HE. R. CaveD. N. AbramJ. Kibsgaard, T. F. Jaramillo. J. Am. Chem. Soc. 2014, 136, 14107-14113.

[2] H. JungS. Y. LeeC. W. LeeM. K. ChoD. H. WonC. KimH. S. OhB. K. Min, Y. J. Hwang. J. Am. Chem. Soc., Article ASAP. (DOI: 10.1021/jacs.8b11237).




February 2019 – present
Postdoc researcher under the supervision of dr. Peter Ngene and Prof. dr. Petra de Jongh. Topic: Electrocatalytic reduction of CO2 with supported metal oxide nanoparticles

September 2014 – December 2018
PhD degree, University of Twente, the Netherlands
Thesis: Photocatalytic Overall Water Splitting Using Modified SrTiO3

09/2011 – 06/2014
Master degree in Applied Chemistry, Dalian University of Technology, China
Thesis: Integrate organic complexes with CdTe quantum dots for photocatalytic H2 production

09/2007 – 06/2011
Bachelor degree in Environmental Engineering, Dezhou University, China