Efficient electrocatalytic proton reduction on CoP nanocrystals embedded in microporous P, N Co-doped carbon spheres with dual active sites

Ramireddy Boppella, Jaemin Park, Wooseok Yang, Jeiwan Tan, Jooho Moon

Research output: Contribution to journalArticle

Abstract

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).

Original languageEnglish
Pages (from-to)529-537
Number of pages9
JournalCarbon
Volume156
DOIs
Publication statusPublished - 2020 Jan

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Electrocatalysts
Nanocrystals
Protons
Hydrogen
Carbon
Pore structure
Electrolysis
Specific surface area
Electrolytes
Current density

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

Cite this

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title = "Efficient electrocatalytic proton reduction on CoP nanocrystals embedded in microporous P, N Co-doped carbon spheres with dual active sites",
abstract = "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).",
author = "Ramireddy Boppella and Jaemin Park and Wooseok Yang and Jeiwan Tan and Jooho Moon",
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Efficient electrocatalytic proton reduction on CoP nanocrystals embedded in microporous P, N Co-doped carbon spheres with dual active sites. / Boppella, Ramireddy; Park, Jaemin; Yang, Wooseok; Tan, Jeiwan; Moon, Jooho.

In: Carbon, Vol. 156, 01.2020, p. 529-537.

Research output: Contribution to journalArticle

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T1 - Efficient electrocatalytic proton reduction on CoP nanocrystals embedded in microporous P, N Co-doped carbon spheres with dual active sites

AU - Boppella, Ramireddy

AU - Park, Jaemin

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AU - Tan, Jeiwan

AU - Moon, Jooho

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N2 - 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).

AB - 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).

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