Fabrication of Co-Grafted g-C3N4/CdSe-NiO Photocathode for Hydrogen Evolution under Visible Light

Guangyu Huang; Jing Yang; Hui Xu; Xiaoshuang Yin; Ying Liu; Wenzhong Yang; Chao Feng; Yun Chen

doi:10.1021/acsaem.4c00912

Fabrication of Co-Grafted g-C₃N₄/CdSe-NiO Photocathode for Hydrogen Evolution under Visible Light

Guangyu Huang, Jing Yang, Hui Xu, Xiaoshuang Yin, Ying Liu, Wenzhong Yang, Chao Feng, Yun Chen

School of Chemistry and Moleculai Engineering

Nanjing Tech University

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

2 Scopus citations

Abstract

A photocathode for driving water splitting under visible light was constructed using mesoporous nickel oxide as a substrate, two-dimensional g-C₃N₄ nanosheet/zero-dimensional CdSe quantum dots as a composite photocatalyst, and cobalt oxime catalyst as an economical cocatalyst. The Co-g-C₃N₄/CdSe-NiO cathode displayed a high photocatalytic current density of −56 μA cm^-2 at a bias of −0.1 V vs NHE in the absence of electron sacrifice, which was about 4 times greater than that of the photocathode using only CdSe quantum dots (−15 μA cm^-2) as the photosensitizer. Simultaneously, the Faraday efficiency of the photocathode was about 90.7%.

Original language	English
Pages (from-to)	6258-6266
Number of pages	9
Journal	ACS Applied Energy Materials
Volume	7
Issue number	15
DOIs	https://doi.org/10.1021/acsaem.4c00912
State	Published - 12 Aug 2024

Keywords

heterojunction
hydrogen generation
photoelectrochemical cell
quantum dots
visible light

UN SDGs

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

Access to Document

10.1021/acsaem.4c00912

Cite this

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title = "Fabrication of Co-Grafted g-C3N4/CdSe-NiO Photocathode for Hydrogen Evolution under Visible Light",

abstract = "A photocathode for driving water splitting under visible light was constructed using mesoporous nickel oxide as a substrate, two-dimensional g-C3N4 nanosheet/zero-dimensional CdSe quantum dots as a composite photocatalyst, and cobalt oxime catalyst as an economical cocatalyst. The Co-g-C3N4/CdSe-NiO cathode displayed a high photocatalytic current density of −56 μA cm-2 at a bias of −0.1 V vs NHE in the absence of electron sacrifice, which was about 4 times greater than that of the photocathode using only CdSe quantum dots (−15 μA cm-2) as the photosensitizer. Simultaneously, the Faraday efficiency of the photocathode was about 90.7\%.",

keywords = "heterojunction, hydrogen generation, photoelectrochemical cell, quantum dots, visible light",

author = "Guangyu Huang and Jing Yang and Hui Xu and Xiaoshuang Yin and Ying Liu and Wenzhong Yang and Chao Feng and Yun Chen",

note = "Publisher Copyright: {\textcopyright} 2024 American Chemical Society.",

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T1 - Fabrication of Co-Grafted g-C3N4/CdSe-NiO Photocathode for Hydrogen Evolution under Visible Light

AU - Huang, Guangyu

AU - Yang, Jing

AU - Xu, Hui

AU - Yin, Xiaoshuang

AU - Liu, Ying

AU - Yang, Wenzhong

AU - Feng, Chao

AU - Chen, Yun

PY - 2024/8/12

Y1 - 2024/8/12

N2 - A photocathode for driving water splitting under visible light was constructed using mesoporous nickel oxide as a substrate, two-dimensional g-C3N4 nanosheet/zero-dimensional CdSe quantum dots as a composite photocatalyst, and cobalt oxime catalyst as an economical cocatalyst. The Co-g-C3N4/CdSe-NiO cathode displayed a high photocatalytic current density of −56 μA cm-2 at a bias of −0.1 V vs NHE in the absence of electron sacrifice, which was about 4 times greater than that of the photocathode using only CdSe quantum dots (−15 μA cm-2) as the photosensitizer. Simultaneously, the Faraday efficiency of the photocathode was about 90.7%.

AB - A photocathode for driving water splitting under visible light was constructed using mesoporous nickel oxide as a substrate, two-dimensional g-C3N4 nanosheet/zero-dimensional CdSe quantum dots as a composite photocatalyst, and cobalt oxime catalyst as an economical cocatalyst. The Co-g-C3N4/CdSe-NiO cathode displayed a high photocatalytic current density of −56 μA cm-2 at a bias of −0.1 V vs NHE in the absence of electron sacrifice, which was about 4 times greater than that of the photocathode using only CdSe quantum dots (−15 μA cm-2) as the photosensitizer. Simultaneously, the Faraday efficiency of the photocathode was about 90.7%.

KW - heterojunction

KW - hydrogen generation

KW - photoelectrochemical cell

KW - quantum dots

KW - visible light

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