@article{Yoon2020, 
author = {Hyunseok Yoon and Hee Jo Song and Bobae Ju and Dong-Wan Kim},
title = {Cobalt phosphide nanoarrays with crystalline-amorphous hybrid phase for hydrogen production in universal-pH},
year = {2020},
journal = {Nano Research},
volume = {13},
number = {9},
pages = {2469-2477},
keywords = {cobalt phosphide, self-supporting, electrocatalyst, hydrogen evolution reaction, universal-ph, large-scale},
url = {https://www.sciopen.com/article/10.1007/s12274-020-2881-y},
doi = {10.1007/s12274-020-2881-y},
abstract = {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.}
}