Mass Loading Optimization for Ethylene Glycol Oxidation at Different Potential Regions

Authors

Sheng-Nan Sun, 1. School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore;2. Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 138634 Singapore;3. Beijing Innovation Center for Engineering Science and Advanced Technology (BIC-ESAT), Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKL-MMD), School of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China;
Zhi-Chuan Xu, 1. School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore;4. Singapore-HUJ Alliance for Research and Enterprise, Campus for Research Excellence and Technological Enterprise (CREATE), NEW-CREATE Phase II, 138602, Singapore;5. Energy Research Institute@NTU, ERI@N, Interdisciplinary Graduate School, Nanyang Technological University, 639798, Singapore;Follow

Corresponding Author

Zhi-Chuan Xu(xuzc@ntu.edu.sg)

Abstract

Designing and fabricating the electrocatalysts is attracting more and more attention in recent years due to a global interest in developing techniques for electrochemical energy conversion and storage, as well as elelectro-synthesis of valuable chemicals. The activity is one of the key performance parameters for electrocatalysts, while the observed activity can be affected by mass loading of electrocatalysts. Here, we take cobalt oxide (Co₃O₄)/graphite paper electrode (Co₃O₄/GPE) as a model electrode to demon-strate how the mass loading of Co₃O₄ catalyst influences ethylene glycol (EG) oxidation in alkaline (KOH) by cyclic votammetry (CV) and chronopentiometry (CP) approaches. Analyses from redox peaks and double layer capacitances reveal that increasing the mass loading provided more electrochemical active sites. Increasing loading made a positive contribution to EG oxidation at the low oxidation potential, while less significant improvement at the high oxidation potential. The results will provide some insight for optimzing the mass loading of electrocatalysts for electrocatalysis of small organic molecules.

Graphical Abstract

Keywords

mass loading, redox, double layer capacitance, cobalt oxide, ethylene glycol oxidation

DOI Link

https://doi.org/10.13208/j.electrochem.210841

Publication Date

2022-02-28

Online Available Date

2021-09-22

Revised Date

2021-09-04

Received Date

2021-08-04

Recommended Citation

Sheng-Nan Sun, Zhi-Chuan Xu. Mass Loading Optimization for Ethylene Glycol Oxidation at Different Potential Regions[J]. Journal of Electrochemistry, 2022 , 28(2): 2108411.
DOI: 10.13208/j.electrochem.210841
Available at: https://jelectrochem.xmu.edu.cn/journal/vol28/iss2/8