Optimizing component and morphology of precious metal nanomaterials can effectively promote their electrocatalytic performance and expand their application area. In this work, Rh₂P ultrathin nanosheets (Rh₂P uNSs) with atomic thickness and big surface area are successfully synthesized by phosphating treatment of Rh ultrathin nanosheets (Rh uNSs). Benefiting from special morphology, component, and electronic structure, Rh₂P uNSs simultaneously display enhanced electrocatalytic activity for anodic hydrazine oxidation reaction (HzOR) as well as cathodic hydrogen evolution reaction (HER) compared to Rh uNSs in acidic media, which only require at −10 mV and 300 mV potential to obtain 10 mA cm⁻² current density for HzOR and HER in three electrode system, respectively. In two electrode system, the symmetric Rh₂P uNSs||Rh₂P uNSs electrolyzer only requires electrolysis voltage of 0.377 V to achieve 10 mA cm⁻² current density for HzOR boosted water splitting in strong acidic media, highlighting an energy-saving electrochemical hydrogen production method.

优化贵金属纳米材料的成分和形态可以有效地提高其电催化性能，扩大其应用领域。通过对Rh超薄纳米片（Rh uNSs）进行磷化处理，成功地合成了原子厚度大，表面积大的Rh ₂ P超薄纳米片（Rh ₂ P uNSs）。与酸性介质中的Rh uNSs相比，Rh ₂ P uNSs具有特殊的形态，成分和电子结构，与Rh uNSs相比，同时显示出对阳极肼氧化反应（HzOR）和阴极氢析出反应（HER）增强的电催化活性。 -10 mV和300 mV电位以获得10 mA cm ^-2三电极系统中HzOR和HER的电流密度分别。在两电极系统中，对称的Rh ₂ P uNSs || Rh ₂ P uNSs电解槽仅需0.377 V的电解电压即可实现10mA cm ^-2的电流密度，从而在强酸性介质中产生HzOR促进的水分解，从而突出了节能型电化学制氢方法。