(543g) Enhanced Electrochemical Ammonia Production Via Peptide-Bound Metal
AIChE Annual Meeting
Wednesday, October 31, 2018 - 2:06pm to 2:12pm
We hypothesize that 3D surface modifications can be utilized to overcome these selective limitations and create catalysts which mimic the selectivity of the nitrogenase enzyme: an enzyme that catalyzes the reduction of nitrogen to ammonia at mild temperatures and pressures. Therefore, in this study, we show that a peptide sequence, when bound to iron(iii) oxide metal nanoparticles, facilitates electrochemical ammonia with relatively high efficiency. These recent results were obtained in an alkaline, solid-state electrochemical cell, yielding an electrochemical ammonia production rate and faradaic efficiency that is >10x higher than the catalyst without bound peptide. These results are corroborated in an alkaline liquid-based cell.
This discussion covers the characterization of the peptide and its interactions with iron(iii) oxide. The goal of this study is to elucidate the peptideâs effects on material properties and how they might lead to increased ammonia production. Techniques and instrumentations used to investigate our system involve a quartz crystal microbalance with dissipation (QCM-D) with humidity and electrochemistry modules, x-ray photoelectron spectroscopy (XPS), BET gas adsorption, circular dichroism (CD), and various electrochemical techniques. The insights revealed in this work will eventually be used to direct material optimization for efficient electrochemical ammonia production.