A facile and scalable method is reported to develop CoP nanocrystals encapsulated in a P, N co-doped C matrix (PNC) as a highly efficient electrocatalyst for hydrogen evolution reaction (HER) in acidic and basic media. The synthesized CoP-PNC electrocatalysts exhibit large specific surface area of 1543 m2 g−1, hierarchical microporous structure, and high density of surface -active sites. The porous CoP-PNC electrocatalysts exhibit excellent HER electroactivity, delivering a current density of 10 mA cm−2 at very low overpotentials of 87 and 106 mV in 0.5 M H2SO4 and 1 M KOH electrolytes, respectively. This remarkable HER performance mainly arises from the synergic effect between CoP and P, N co-doped C, high density of active sites and large surface area due to the multiple pore structures. Most importantly, the CoP-PNC retains high stability even after 40 h of continuous electrolysis in extremely acidic (pH = 0) and basic solutions (pH = 14).
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation (NRF) of Korea grant (No. 2012R1A3A2026417 ) and the Creative Materials Discovery Program ( NRF-2018M3D1A1058793 ) funded by the Ministry of Science and ICT . Appendix A
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All Science Journal Classification (ASJC) codes
- Materials Science(all)