Molybdenum phosphide (MoP) nanoparticles encapsulated in N,P-codoped hollow carbon nanospheres ([email protected]) have been synthesized as electrocatalysts for hydrogen evolution reaction (HER) based on an induced phosphorization of an inorganic-organic Mo-P/polyaniline-pyrrole precursor. Notably, the P sources in the polyaniline-pyrrole precursor are responsible for the formation of well-dispersed MoP nanoparticles and enlarged hollow carbon nanospheres through a P-induced process, which can be described as induced phosphorization for realizing the shift and good dispersion of MoP encapsulated in carbon nanospheres. In addition, the polyaniline-pyrrole precursor could avoid the aggregation of MoP nanoparticles and protect MoP from corrosion during the HER process. N,P-codoped carbon layers provide remarkable conductivity for the higher utilization of active sites. Moreover, compared to solid nanostructures ([email protected]), the [email protected] possesses a larger BET surface area and implies superior HER performance, which requires an overpotential of only 141 mV in acidic, 176 mV in alkaline, and 198 mV in neutral solution to achieve a current density of 10 mA cm^–2. The enhancement mechanisms of HER performances have been discussed. The facile approach may provide a new way for preparing highly dispersed MoP encapsulated in carbon materials based on the induced phosphorization.

中文翻译：

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空心N掺杂碳纳米球中封装的诱导磷酸化的高分散性磷钼纳米颗粒，可有效释放氢气

基于无机有机Mo-P /聚苯胺-的诱导磷酸化，已合成了包裹在N，P掺杂的空心碳纳米球（[电子邮件受保护]）中的磷化钼（MoP）纳米颗粒作为氢析出反应（HER）的电催化剂。吡咯前体。值得注意的是，聚苯胺-吡咯前体中的P源通过P诱导过程负责形成分散良好的MoP纳米颗粒和扩大的中空碳纳米球，这可以描述为诱导磷化以实现MoP的移动和良好分散封装在碳纳米球中。此外，聚苯胺-吡咯前体可避免HER过程中MoP纳米颗粒的聚集并保护MoP免受腐蚀。N，P掺杂的碳层为提高活性位点的利用率提供了出色的导电性。此外，与固态纳米结构（[受电子邮件保护]）相比，[受电子邮件保护]具有更大的BET表面积，并具有卓越的HER性能，这要求在酸性下的过电势仅为141 mV，在碱性下的过电势为176 mV，在酸性下的电势为198 mV。中性溶液以实现10 mA cm的电流密度^–2。讨论了HER性能的增强机制。简便的方法可为基于诱导的磷化制备封装在碳材料中的高度分散的MoP提供新的方法。