The article discusses a novel catalysis design for the selective hydrogenation of acetylene to ethylene, crucial for carbon management strategies. Atomistic simulations highlight the effectiveness of Pd:C solid solutions in optimizing chemisorption energies while preventing sub-surface hydrides. The new Pd:C system, featuring a laterally condensed catalyst (LCC), consistently achieves ethylene productivity exceeding 1 kmolC2H4/gPd/hour, outperforming existing catalysts. This self-repairing LCC design allows for precise control over reactive interfaces and sub-surface volume, leading to enhanced catalytic performance. Operando micro-spectroscopy confirms the functionality and metrics of the catalyst. The scalability of this innovative design on real-world substrates demonstrates its potential for large-scale applications, supporting sustainable carbon management efforts. By enabling rapid and reliable conversion in high-volume gas streams, this new catalysis concept offers promising prospects for efficient ethylene production and carbon mitigation.