Tailored p‐Orbital Delocalization by Diatomic Pt‐Ce Induced Interlayer Spacing Engineering for Highly‐Efficient Ammonia Electrosynthesis

, thus enhancing the chemical affinity towards NO 3 − and NO 2 − but inhibiting hydrogen evolution simultaneously and promoting the rate-determining step of *NO 3 → *NO 2 in eNO 3 RR. Consequently, the designed SnS catalysts show an excellent FE for NH 3 (94.12%) and Y NH3 (0.3056 mmol cm − 2 h − 1 ) at − 0.5 V versus RHE. By the strong chemical interaction between Ce and Pt atoms, this work provides a powerful strategy for tailoring flexible interlayer spacing of 2D materials, opening a new avenue for constructing high-performance catalysts for ammonia synthesis