To accomplish mass hydrogen production by electrochemical water-splitting, it is a necessary to develop robust, highly active, stable, and cost-effective hydrogen evolution reaction (HER) electrocatalysts that perform comparably to Pt in the universal pH range. In this work, cobalt phosphide hybrid nanosheets supported on carbon felt (CoP HNS/CF) are presented, which exhibit the superior electrocatalytic hydrogen production under a universal-pH. In these nanosheets, a single CoP HNS is composed of polycrystalline CoP and oxygen-enriched amorphous Co-O-P phase. Benefiting from its unique nanoarchitecture, as-fabricated CoP HNS/CF exhibits a tremendous electrocatalytic HER activity and outperforms Pt/C as well as state-of-the-art CoP electrocatalysts in universal-pH. In acidic and neutral media, the CoP HNS/CF shows superior electrocatalytic activity while maintaining its original hybrid crystalline-amorphous phase and morphology. In alkaline medium, the unexpected phase and morphological reorganization of CoP HNS/CF results in outstanding electrocatalytic operation. CoP HNS/CF not only achieves high electrocatalytic activity and kinetics, but also a stable and long operating lifetime even under a high current density of 500 mA·cm⁻². Furthermore, the fabrication of CoP HNS/CF can be scaled up easily, and the large CoP HNS/CF electrode also exhibits similar electrocatalytic activity and stability.

为了通过电化学水分解完成大量的氢气生产，必须开发出在通用pH范围内性能与Pt相当的坚固，高活性，稳定且具有成本效益的氢气析出反应（HER）电催化剂。在这项工作中，提出了载于碳毡（CoP HNS / CF）上的磷化钴杂化纳米片，在通用pH值下表现出优异的电催化制氢能力。在这些纳米片中，单个CoP HNS由多晶CoP和富氧非晶Co-OP相组成。得益于其独特的纳米结构，制成的CoP HNS / CF表现出巨大的电催化HER活性，在通用pH值下表现优于Pt / C和最先进的CoP电催化剂。在酸性和中性介质中，CoP HNS / CF显示出优异的电催化活性，同时保持了其原始的杂化非晶态相和形态。在碱性介质中，CoP HNS / CF的意外相和形态重组会导致出色的电催化操作。CoP HNS / CF不仅具有高的电催化活性和动力学性能，而且即使在500 mA·cm的高电流密度下也具有稳定而长的使用寿命⁻²。此外，CoP HNS / CF的制造可以轻松按比例扩大，并且大型CoP HNS / CF电极也显示出相似的电催化活性和稳定性。