CoSe2 Embedded in C3N4: An Efficient Photocathode for Photoelectrochemical Water Splitting

Mrinmoyee Basu; Zhi Wei Zhang; Chih Jung Chen; Tzu Hsiang Lu; Shu Fen Hu; Ru Shi Liu

doi:10.1021/acsami.6b06520

CoSe₂ Embedded in C₃N₄: An Efficient Photocathode for Photoelectrochemical Water Splitting

Mrinmoyee Basu, Zhi Wei Zhang, Chih Jung Chen, Tzu Hsiang Lu, Shu Fen Hu^*, Ru Shi Liu

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

45 Citations (Scopus)

Abstract

An efficient H₂ evolution catalyst is developed by grafting CoSe₂ nanorods into C₃N₄ nanosheets. The as-obtained C₃N₄-CoSe₂ heterostructure can show excellent performance in H₂ evolution with outstanding durability. To generate phatocathode for photoelectrochemical water splitting CoSe₂ grafted in C₃N₄ was decorated on the top of p-Si microwires (MWs). p-Si/C₃N₄-CoSe₂ heterostructure can work as an efficient photocathode material for solar H₂ production in PEC water splitting. In 0.5 M H₂SO₄, p-Si/C₃N₄-CoSe₂ can afford photocurrent density -4.89 mA/cm² at "0" V vs RHE and it can efficiently work for 3.5 h under visible light. Superior activity of C₃N₄-CoSe₂ compared to CoSe₂ toward H₂ evolution is explained with the help of impedance spectroscopy.

Original language	English
Pages (from-to)	26690-26696
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	8
Issue number	40
DOIs	https://doi.org/10.1021/acsami.6b06520
Publication status	Published - 2016 Oct 12

Keywords

CN-CoSe
heterostructure
hydrogen evolution
nanorod
photocathode

ASJC Scopus subject areas

General Materials Science

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acsami.6b06520

Cite this

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title = "CoSe2 Embedded in C3N4: An Efficient Photocathode for Photoelectrochemical Water Splitting",

abstract = "An efficient H2 evolution catalyst is developed by grafting CoSe2 nanorods into C3N4 nanosheets. The as-obtained C3N4-CoSe2 heterostructure can show excellent performance in H2 evolution with outstanding durability. To generate phatocathode for photoelectrochemical water splitting CoSe2 grafted in C3N4 was decorated on the top of p-Si microwires (MWs). p-Si/C3N4-CoSe2 heterostructure can work as an efficient photocathode material for solar H2 production in PEC water splitting. In 0.5 M H2SO4, p-Si/C3N4-CoSe2 can afford photocurrent density -4.89 mA/cm2 at {"}0{"} V vs RHE and it can efficiently work for 3.5 h under visible light. Superior activity of C3N4-CoSe2 compared to CoSe2 toward H2 evolution is explained with the help of impedance spectroscopy.",

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author = "Mrinmoyee Basu and Zhang, {Zhi Wei} and Chen, {Chih Jung} and Lu, {Tzu Hsiang} and Hu, {Shu Fen} and Liu, {Ru Shi}",

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AU - Basu, Mrinmoyee

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AU - Lu, Tzu Hsiang

AU - Hu, Shu Fen

AU - Liu, Ru Shi

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N2 - An efficient H2 evolution catalyst is developed by grafting CoSe2 nanorods into C3N4 nanosheets. The as-obtained C3N4-CoSe2 heterostructure can show excellent performance in H2 evolution with outstanding durability. To generate phatocathode for photoelectrochemical water splitting CoSe2 grafted in C3N4 was decorated on the top of p-Si microwires (MWs). p-Si/C3N4-CoSe2 heterostructure can work as an efficient photocathode material for solar H2 production in PEC water splitting. In 0.5 M H2SO4, p-Si/C3N4-CoSe2 can afford photocurrent density -4.89 mA/cm2 at "0" V vs RHE and it can efficiently work for 3.5 h under visible light. Superior activity of C3N4-CoSe2 compared to CoSe2 toward H2 evolution is explained with the help of impedance spectroscopy.

AB - An efficient H2 evolution catalyst is developed by grafting CoSe2 nanorods into C3N4 nanosheets. The as-obtained C3N4-CoSe2 heterostructure can show excellent performance in H2 evolution with outstanding durability. To generate phatocathode for photoelectrochemical water splitting CoSe2 grafted in C3N4 was decorated on the top of p-Si microwires (MWs). p-Si/C3N4-CoSe2 heterostructure can work as an efficient photocathode material for solar H2 production in PEC water splitting. In 0.5 M H2SO4, p-Si/C3N4-CoSe2 can afford photocurrent density -4.89 mA/cm2 at "0" V vs RHE and it can efficiently work for 3.5 h under visible light. Superior activity of C3N4-CoSe2 compared to CoSe2 toward H2 evolution is explained with the help of impedance spectroscopy.

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