This research develops new electrocatalysts to store renewable energy in low-cost liquid fuels, helping make clean energy available even when sunlight and wind are intermittent. Instead of relying on expensive batteries or compressed hydrogen gas, the work explores electrochemical liquid organic hydrogen carriers, focusing on the acetone-isopropanol pair as a potentially scalable and affordable option for seasonal energy storage. The central challenge is designing catalysts that drive hydrogenation both efficiently and selectively. To address this, the project uses an evolutionary strategy in which high-throughput experiments generate many catalyst compositions, automated measurements identify the best performers, and machine learning guides the next round of discovery. Two complementary approaches are pursued: multi-metal alloy catalysts and bifunctional catalyst interfaces. Together, they aim to reveal general design rules for sustainable energy storage technologies.