|About this Abstract
||MS&T22: Materials Science & Technology
||Energy Materials for Sustainable Development
||Non-precious Metal Catalysts with Core@shell Structure for AEM Electrolyzers
||Manjodh Kaur, James McKone
|On-Site Speaker (Planned)
Alkaline anion exchange membrane electrolyzers are promising for cost-effective and carbon-neutral hydrogen production. In this context, our focus is on non-precious metal catalysts, Ni–Mo alloys and Ni–Fe alloys for hydrogen and oxygen evolution, respectively. For Ni–Mo catalysts, in situ transmission electron microscopy analysis has clarified the presence of Ni-rich core surrounded by Mo-rich oxide shell. We found that carbon-supported catalysts provide pathways for electron conduction to mitigate the resistivity due to the presence of the oxide shells. The total cell potential required for water electrolysis was only 50–70 mV higher with a Ni–Mo/C cathode catalyst compared to Pt–Ru/C over the range of current densities from 0.2 to 2 A/cm2. Additional ongoing work to understand catalyst stability and applications in practical anion exchange membrane electrolyzers will be discussed.