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1·Formic Acid, Acetic Acid, Propionic Acid and Ammonium Formate.

甲酸，乙酸，丙酸和甲酸铵。

2·Ammonium formate and sodium formate are the suitable hydrogen donors.

甲酸铵和甲酸钠是优良的氢源。

3·At last, the target product 4-Hydroxypyridine was gaven by reduction of 4-Hydroxypyridine N-oxide using zinc and Ammonium Formate as catalysts.

然后脱硝基得到4-羟基吡啶-N-氧化合物，最后用锌和甲酸铵还原4-羟基吡啶-N-氧化合物得到产物4-羟基吡啶。

4·In addition, a basic discussion on the possible mechanisms of the dechlorination reaction by ZVI and on the likely roles of ammonium formate was provided in this paper.

文中对零价铁还原脱氯反应机理和助剂甲酸铵的作用机理作了初步探讨。