Abstract
The rational design of electrocatalysts is paramount to the development of electrochemical devices. In particular, modifications to the structure and electronic properties of a particular catalyst can have a strong influence on the activity and selectivity towards various electrochemical reactions or pathways. In many cases this can lead to a particular reaction pathway being opened or closed, the formation of intermediates being stabilized or inhibited, the adsorption of poisonous species being mitigated, or the removal of poisonous species being promoted. In the this dissertation the design and characterization of catalysts for electrochemical devices (fuel cells, electrolyzers, and hydrogen pumps) will be discussed with regards to tailoring the selectivity in order to promote or inhibit certain electrochemical reactions. The electrochemical reactions of primary interest will include the methanol oxidation reaction (MOR), the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen oxidation reaction (HOR).
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