AbstractThe synthesis of solvent‐less bare‐surface nickel phosphides is desired, considering their superior electrocatalytic properties and straightforward synthetic protocols compared to their analogues prepared from colloidal routes. Herein, we report the synthesis of [NiS2P(OH)(4‐CH3OC6H4)}2] (1), [FeS2P(OH)(4‐CH3OC6H4)}3] (2) and [CoS2P(OC4H9)(4‐CH3OC6H4)}3] (3) and their utilization to form Ni2P, Fe‐Ni2P and Co‐Ni2P in a solvent‐less pyrolysis method. This solvent‐free protocol involved the decomposition of complex (1) and the composites of complex (1) with (2) or (3) in the presence of triphenylphosphine (TPP) at 400 °C for one hour. The solvent‐less decomposition of complex (1) without TPP formed nickel sulfide. A plausible explanation for this rare fabrication of pristine and doped Ni2P in the absence of any solvent is suggested. All the transition metal doped phosphides improved the HER performance of pristine Ni2P, with the 5 % Fe doped Ni2P having the best performance, requiring 137 mV to reach a current density of 10 mA/cm2. Similarly, the OER performance of un‐doped Ni2P was improved by all the doped Ni2P catalysts, where 10 % Fe‐doped Ni2P showed the best performance requiring 326 mV to reach a current density of 10 mA/cm2. Transition metal doping was also shown to improve the reaction kinetics, stability and durability of the solvent‐free prepared Ni2P.
摘要 与通过胶体路线制备的类似物相比,无溶剂裸表面
磷化镍具有更优越的电催化性能和更简便的合成方案,因此人们希望合成无溶剂裸表面
磷化镍。在此,我们报告了[NiS2P(OH)(4-CH3OC6H4)}2](1)、[FeS2P(OH)(4-CH3OC6H4)}3](2)和[CoS2P(OC4H9)(4-CH3OC6H4)}3](3)的合成及其在无溶剂热解法中形成
Ni2P、Fe- 和 Co- 的应用。这种无溶剂方案包括在
三苯基膦(
TPP)存在下,于 400 °C 下分解配合物 (1) 以及配合物 (1) 与 (2) 或 (3) 的复合物一小时。在没有
三苯基膦的情况下,络合物(1)在无溶剂分解过程中形成了
硫化镍。对于这种罕见的在无溶剂情况下生成原始和掺杂 的现象,我们提出了一个合理的解释。所有掺杂过渡
金属的
磷化物都提高了原始 的 HER 性能,其中掺杂 5% Fe 的 性能最好,需要 137 mV 才能达到 10 mA/cm2 的电流密度。同样,所有掺杂 催化剂都改善了未掺杂 的 OER 性能,其中掺杂 10% Fe 的 性能最佳,需要 326 mV 才能达到 10 mA/cm2 的电流密度。掺杂过渡
金属还能改善无溶剂制备的 的反应动力学、稳定性和耐久性。