Major Contributions
 

1. Constructed hydroxyl-rich nanocavities on La₀.₄Sr₀.₆FeO₃₋δ perovskite by electrochemical reduction-assisted selective Sr leaching, creating nanocavity walls enriched with hydroxyl groups.

2. Experiments and theory reveal a nearly barrierless hydrogen-transfer pathway along intramolecular hydrogen bonds between hydroxyls, boosting active hydrogen generation and hopping for NO₃⁻ hydrogenation.

3. The catalyst reaches a Faradaic efficiency of 97.81% and an NH₃ yield of 51.37 mg h⁻¹ cm⁻² at −0.8 V vs RHE, and ampere-level conversion at 2.23 V in a renewable-powered electrolyzer; techno-economic analysis supports its viability.

主要貢獻
 

1. 以電化學還原輔助選擇性溶出鍶離子，在 La₀.₄Sr₀.₆FeO₃₋δ 鈣鈦礦表面建構壁面富含羥基的奈米空腔。

2. 實驗與理論計算顯示，氫可沿羥基間的分子內氫鍵以近乎無能障的路徑轉移，促進活性氫生成與跳躍，加速 NO₃⁻ 氫化。

3. 於 −0.8 V vs RHE 下法拉第效率 97.81%、NH₃ 產率 51.37 mg h⁻¹ cm⁻²；在再生能源供電的電解槽中以 2.23 V 達到安培級電流，技術經濟分析顯示具可行性。