Metal–support interaction triggered d–p orbital hybridization for efficient electrocatalytic semi-hydrogenation of alkynes

Atomic restructuring in Pd/Fe 2 O 3 catalysts weakens Pd binding to chemisorbed 4-aminophenylacetylene and hydrogen intermediates, boosting conversion and selectivity in 4-aminophenylacetylene semi-hydrogenation, surpassing Pd/C and other catalysts.