(544bm) Metal Supported Ultrathin Oxide/Oxyhydroxide Thin Films for Oxygen Reduction Reaction
AIChE Annual Meeting
2018
2018 AIChE Annual Meeting
Catalysis and Reaction Engineering Division
Poster Session: Catalysis and Reaction Engineering (CRE) Division
Wednesday, October 31, 2018 - 3:30pm to 5:00pm
A successful commercialization of fuel cell is currently limited by a lack of cost-effective and highly active electrocatalysts for a cathode reaction (oxygen reduction reaction, ORR). As a promising catalyst candidate for electrochemical reactions, partially oxidized ultrathin metal film supported on transition metal substrates have been investigated recently. Previous theoretical results by Greeley et al.1 showed that partially oxidized metals can be stabilized by the presence of metal substrates, altering the stability of metal (hydroxyl-)oxide compared to the bulk counterparts. They also applied metal-supported thin films toward alkaline hydrogen evolution reaction, and calculations demonstrated its high potential to lower the reaction kinetic barriers.
In this talk, I will discuss the stability of various thin film metal (hydroxy-) oxides on various metal substrates. Cost-effective metal (hydroxy-) oxides on three face centered cubic (fcc) metal supports were considered. The density functional theory results show that most of metal (hydroxy-) oxide thin films are stabilized on metal supports, implying a possibility of metal-supported thin films to survive in ORR conditions. I will also discuss the applicability of these materials as ORR catalysts.
1Z. Zeng, K. Chang, J. Kubal, N. Markovic and J. Greeley, Nature Energy 2, Article number: 17070 (2017)