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DOE OSTI2024

Abstract for CRADA between National Energy Technology Laboratory and Elysia LLC

The National Energy Technology Laboratory (NETL) and Elysia Labs LLC are embarking on a collaborative project to develop and evaluate a low-cost, high-performance carbon dioxide capture process for the burgeoning Direct Air Capture (DAC) industry. The partnership will focus on developing an electrospun fiber based air contactor that promises higher efficiency and lower costs to set a new standard in the DAC field. The expected outcomes of this collaboration include the creation of a DAC contactor that significantly outperforms existing technologies in cost, capacity, cycle time, regeneration energy, and durability. This project is a result of an awarded project from the Department of Energy’s Direct Air Capture Pre-Commercialization Technology Prize.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗

DOE OSTI2020

Pt–Co truncated octahedral nanocrystals: a class of highly active and durable catalysts toward oxygen reduction

We report a facile and scalable synthesis of Pt–Co truncated octahedral nanocrystals (TONs) by employing Pt(acac) 2 and Co(acac) 2 as precursors, together with CO molecules and Mn atoms derived from the decomposition of Mn 2 (CO) 10 as a reductant and a {111} facet-directing agent, respectively. Both the composition and yield of the Pt–Co TONs could be varied through the introduction of CHCl 3 . When tested at 80 °C using membrane electrode assembly (MEA), the 4 nm Pt 2.6 Co TONs gave a mass activity of 294 A g Pt –1 at beginning-of-life (BOL) and it increased to 384 A g Pt –1 during recovery cycles. The mass activity at BOL only dropped by 24% after 30 000 voltage cycles at end-of-life (EOL) in a metal dissolution accelerated stress test. The Pt 2.6 Co/C catalyst outperformed the commercial TKK Pt 3 Co/C (230 A g Pt –1 at BOL and 40% loss after 30 000 cycles at EOL) in terms of both activity and durability. Our systematic analysis suggested that the enhancement in activity can be attributed to the combination of small, uniform size and well-defined {111} facets. This new class of catalysts holds promise for applications in proton-exchange membrane fuel cells.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗