Homologous CoP/NiCoP Heterostructure on N-Doped Carbon for Highly Efficient and pH-Universal Hydrogen Evolution Electrocatalysis

Ramireddy Boppella, Jeiwan Tan, Wooseok Yang, Joo Ho Moon

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Hydrogen evolution electrocatalysts can achieve sustainable hydrogen production via electrocatalytic water splitting; however, designing highly active and stable noble-metal-free hydrogen evolution electrocatalysts that perform as efficiently as Pt catalysts over a wide pH range is a challenging task. Herein, a new 2D cobalt phosphide/nickelcobalt phosphide (CoP/NiCoP) hybrid nanosheet network is proposed, supported on an N-doped carbon (NC) matrix as a highly efficient and durable pH-universal hydrogen evolution reaction (HER) electrocatalyst. It is derived from topological transformation of corresponding layer double hydroxides and graphitic carbon nitride. This 2D CoP/NiCoP/NC catalyst exhibits versatile HER electroactivity with very low overpotentials of 75, 60, and 123 mV in 1 m KOH, 0.5 m H2SO4, and 1 m PBS electrolytes, respectively, delivering a current density of 10 mA cm−2 for HER. Such impressive HER performance of the hybrid electrocatalyst is mainly attributed to the collective effects of electronic structure engineering, strong interfacial coupling between CoP and NiCoP in heterojunction, an enlarged surface area/exposed catalytic active sites due to the 2D morphology, and conductive NC support. This method is believed to provide a basis for the development of efficient 2D electrode materials with various electrochemical applications.

Original languageEnglish
Article number1807976
JournalAdvanced Functional Materials
Volume29
Issue number6
DOIs
Publication statusPublished - 2019 Feb 8

Fingerprint

Electrocatalysis
phosphides
Cobalt
Heterojunctions
Hydrogen
cobalt
Carbon
electrocatalysts
Electrocatalysts
carbon
hydrogen
Hydroxides
catalysts
Catalysts
water splitting
carbon nitrides
Carbon nitride
Nanosheets
hydrogen production
electrode materials

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrochemistry

Cite this

@article{8edd35ccd5ad48bb8c5dc8d98d7aa7bd,
title = "Homologous CoP/NiCoP Heterostructure on N-Doped Carbon for Highly Efficient and pH-Universal Hydrogen Evolution Electrocatalysis",
abstract = "Hydrogen evolution electrocatalysts can achieve sustainable hydrogen production via electrocatalytic water splitting; however, designing highly active and stable noble-metal-free hydrogen evolution electrocatalysts that perform as efficiently as Pt catalysts over a wide pH range is a challenging task. Herein, a new 2D cobalt phosphide/nickelcobalt phosphide (CoP/NiCoP) hybrid nanosheet network is proposed, supported on an N-doped carbon (NC) matrix as a highly efficient and durable pH-universal hydrogen evolution reaction (HER) electrocatalyst. It is derived from topological transformation of corresponding layer double hydroxides and graphitic carbon nitride. This 2D CoP/NiCoP/NC catalyst exhibits versatile HER electroactivity with very low overpotentials of 75, 60, and 123 mV in 1 m KOH, 0.5 m H2SO4, and 1 m PBS electrolytes, respectively, delivering a current density of 10 mA cm−2 for HER. Such impressive HER performance of the hybrid electrocatalyst is mainly attributed to the collective effects of electronic structure engineering, strong interfacial coupling between CoP and NiCoP in heterojunction, an enlarged surface area/exposed catalytic active sites due to the 2D morphology, and conductive NC support. This method is believed to provide a basis for the development of efficient 2D electrode materials with various electrochemical applications.",
author = "Ramireddy Boppella and Jeiwan Tan and Wooseok Yang and Moon, {Joo Ho}",
year = "2019",
month = "2",
day = "8",
doi = "10.1002/adfm.201807976",
language = "English",
volume = "29",
journal = "Advanced Functional Materials",
issn = "1616-301X",
publisher = "Wiley-VCH Verlag",
number = "6",

}

Homologous CoP/NiCoP Heterostructure on N-Doped Carbon for Highly Efficient and pH-Universal Hydrogen Evolution Electrocatalysis. / Boppella, Ramireddy; Tan, Jeiwan; Yang, Wooseok; Moon, Joo Ho.

In: Advanced Functional Materials, Vol. 29, No. 6, 1807976, 08.02.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Homologous CoP/NiCoP Heterostructure on N-Doped Carbon for Highly Efficient and pH-Universal Hydrogen Evolution Electrocatalysis

AU - Boppella, Ramireddy

AU - Tan, Jeiwan

AU - Yang, Wooseok

AU - Moon, Joo Ho

PY - 2019/2/8

Y1 - 2019/2/8

N2 - Hydrogen evolution electrocatalysts can achieve sustainable hydrogen production via electrocatalytic water splitting; however, designing highly active and stable noble-metal-free hydrogen evolution electrocatalysts that perform as efficiently as Pt catalysts over a wide pH range is a challenging task. Herein, a new 2D cobalt phosphide/nickelcobalt phosphide (CoP/NiCoP) hybrid nanosheet network is proposed, supported on an N-doped carbon (NC) matrix as a highly efficient and durable pH-universal hydrogen evolution reaction (HER) electrocatalyst. It is derived from topological transformation of corresponding layer double hydroxides and graphitic carbon nitride. This 2D CoP/NiCoP/NC catalyst exhibits versatile HER electroactivity with very low overpotentials of 75, 60, and 123 mV in 1 m KOH, 0.5 m H2SO4, and 1 m PBS electrolytes, respectively, delivering a current density of 10 mA cm−2 for HER. Such impressive HER performance of the hybrid electrocatalyst is mainly attributed to the collective effects of electronic structure engineering, strong interfacial coupling between CoP and NiCoP in heterojunction, an enlarged surface area/exposed catalytic active sites due to the 2D morphology, and conductive NC support. This method is believed to provide a basis for the development of efficient 2D electrode materials with various electrochemical applications.

AB - Hydrogen evolution electrocatalysts can achieve sustainable hydrogen production via electrocatalytic water splitting; however, designing highly active and stable noble-metal-free hydrogen evolution electrocatalysts that perform as efficiently as Pt catalysts over a wide pH range is a challenging task. Herein, a new 2D cobalt phosphide/nickelcobalt phosphide (CoP/NiCoP) hybrid nanosheet network is proposed, supported on an N-doped carbon (NC) matrix as a highly efficient and durable pH-universal hydrogen evolution reaction (HER) electrocatalyst. It is derived from topological transformation of corresponding layer double hydroxides and graphitic carbon nitride. This 2D CoP/NiCoP/NC catalyst exhibits versatile HER electroactivity with very low overpotentials of 75, 60, and 123 mV in 1 m KOH, 0.5 m H2SO4, and 1 m PBS electrolytes, respectively, delivering a current density of 10 mA cm−2 for HER. Such impressive HER performance of the hybrid electrocatalyst is mainly attributed to the collective effects of electronic structure engineering, strong interfacial coupling between CoP and NiCoP in heterojunction, an enlarged surface area/exposed catalytic active sites due to the 2D morphology, and conductive NC support. This method is believed to provide a basis for the development of efficient 2D electrode materials with various electrochemical applications.

UR - http://www.scopus.com/inward/record.url?scp=85058457512&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85058457512&partnerID=8YFLogxK

U2 - 10.1002/adfm.201807976

DO - 10.1002/adfm.201807976

M3 - Article

VL - 29

JO - Advanced Functional Materials

JF - Advanced Functional Materials

SN - 1616-301X

IS - 6

M1 - 1807976

ER -