Earth abundant transition metal-doped few-layered MoS2 nanosheets on CdS nanorods for ultra-efficient photocatalytic hydrogen production

Sangyeob Hong, D. Praveen Kumar, Eun Hwa Kim, Hanbit Park, Madhusudana Gopannagari, D. Amaranatha Reddy, Tae Kyu Kim

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The development of efficient, cost-effective, clean, and renewable ways to generate hydrogen is crucial to fulfill energy demand and relieve environmental concerns. The layered nanostructures of two-dimensional transition metal dichalcogenides (TMDs) are promising non-precious and noble-metal-free materials for use as hydrogen evolution reaction photocatalysts. The activity of TMDs mainly depends on their exposed edges because the basal planes are catalytically inactive; thus, the conversion of the basal planes to catalytically active sites is a current challenge. The doping of transition metals into the MoS2 system is a fruitful way to activate the basal plane surfaces, making them catalytically active. Herein, we report few-layered copper-doped MoS2 nanosheets decorated on CdS nanorods (FCM/CdS), which are prepared by a simple method. The photocatalytic activity of the as-synthesized FCM/CdS composites was assessed by the splitting of water to generate H2 under simulated solar light irradiation in the presence of lactic acid as a hole (h+) scavenger. The extraordinary hydrogen production rate of 194.18 μmol h-1, a 52-fold enhancement compared to that of bare CdS, arises from the synergistic effect of the few-layered MoS2 and the metal doping, which leads to the effective separation of photogenerated charge carriers and improves the surface shuttling properties for efficient H2 production. The exceptional photocatalytic activity of FCM/CdS nanocomposites results from the improved edge sites, enhanced electronic conductivity, and the presence of new active sites. Furthermore, the observed H2 evolution rate was much higher than those for the individual few-layered MoS2-assisted CdS (FM/CdS) photocatalysts. The H2 production rate achieved with our MoS2-based CdS photocatalyst for water splitting under solar irradiation has been the highest observed to date. Consequently, considering the low cost and high efficiency of this system, it has enormous potential for use as a photocatalyst in various fields.

Original languageEnglish
Pages (from-to)20851-20859
Number of pages9
JournalJournal of Materials Chemistry A
Volume5
Issue number39
DOIs
Publication statusPublished - 2017 Jan 1

Fingerprint

Nanosheets
Photocatalysts
Hydrogen production
Nanorods
Transition metals
Earth (planet)
Hydrogen
Doping (additives)
Irradiation
Water
Lactic acid
Precious metals
Charge carriers
Surface properties
Costs
Copper
Lactic Acid
Nanostructures
Nanocomposites
Metals

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Hong, Sangyeob ; Kumar, D. Praveen ; Kim, Eun Hwa ; Park, Hanbit ; Gopannagari, Madhusudana ; Reddy, D. Amaranatha ; Kim, Tae Kyu. / Earth abundant transition metal-doped few-layered MoS2 nanosheets on CdS nanorods for ultra-efficient photocatalytic hydrogen production. In: Journal of Materials Chemistry A. 2017 ; Vol. 5, No. 39. pp. 20851-20859.
@article{ca6cdb63aa8a4614ba7463aca6c8831b,
title = "Earth abundant transition metal-doped few-layered MoS2 nanosheets on CdS nanorods for ultra-efficient photocatalytic hydrogen production",
abstract = "The development of efficient, cost-effective, clean, and renewable ways to generate hydrogen is crucial to fulfill energy demand and relieve environmental concerns. The layered nanostructures of two-dimensional transition metal dichalcogenides (TMDs) are promising non-precious and noble-metal-free materials for use as hydrogen evolution reaction photocatalysts. The activity of TMDs mainly depends on their exposed edges because the basal planes are catalytically inactive; thus, the conversion of the basal planes to catalytically active sites is a current challenge. The doping of transition metals into the MoS2 system is a fruitful way to activate the basal plane surfaces, making them catalytically active. Herein, we report few-layered copper-doped MoS2 nanosheets decorated on CdS nanorods (FCM/CdS), which are prepared by a simple method. The photocatalytic activity of the as-synthesized FCM/CdS composites was assessed by the splitting of water to generate H2 under simulated solar light irradiation in the presence of lactic acid as a hole (h+) scavenger. The extraordinary hydrogen production rate of 194.18 μmol h-1, a 52-fold enhancement compared to that of bare CdS, arises from the synergistic effect of the few-layered MoS2 and the metal doping, which leads to the effective separation of photogenerated charge carriers and improves the surface shuttling properties for efficient H2 production. The exceptional photocatalytic activity of FCM/CdS nanocomposites results from the improved edge sites, enhanced electronic conductivity, and the presence of new active sites. Furthermore, the observed H2 evolution rate was much higher than those for the individual few-layered MoS2-assisted CdS (FM/CdS) photocatalysts. The H2 production rate achieved with our MoS2-based CdS photocatalyst for water splitting under solar irradiation has been the highest observed to date. Consequently, considering the low cost and high efficiency of this system, it has enormous potential for use as a photocatalyst in various fields.",
author = "Sangyeob Hong and Kumar, {D. Praveen} and Kim, {Eun Hwa} and Hanbit Park and Madhusudana Gopannagari and Reddy, {D. Amaranatha} and Kim, {Tae Kyu}",
year = "2017",
month = "1",
day = "1",
doi = "10.1039/c7ta06556f",
language = "English",
volume = "5",
pages = "20851--20859",
journal = "Journal of Materials Chemistry A",
issn = "2050-7488",
publisher = "Royal Society of Chemistry",
number = "39",

}

Earth abundant transition metal-doped few-layered MoS2 nanosheets on CdS nanorods for ultra-efficient photocatalytic hydrogen production. / Hong, Sangyeob; Kumar, D. Praveen; Kim, Eun Hwa; Park, Hanbit; Gopannagari, Madhusudana; Reddy, D. Amaranatha; Kim, Tae Kyu.

In: Journal of Materials Chemistry A, Vol. 5, No. 39, 01.01.2017, p. 20851-20859.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Earth abundant transition metal-doped few-layered MoS2 nanosheets on CdS nanorods for ultra-efficient photocatalytic hydrogen production

AU - Hong, Sangyeob

AU - Kumar, D. Praveen

AU - Kim, Eun Hwa

AU - Park, Hanbit

AU - Gopannagari, Madhusudana

AU - Reddy, D. Amaranatha

AU - Kim, Tae Kyu

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The development of efficient, cost-effective, clean, and renewable ways to generate hydrogen is crucial to fulfill energy demand and relieve environmental concerns. The layered nanostructures of two-dimensional transition metal dichalcogenides (TMDs) are promising non-precious and noble-metal-free materials for use as hydrogen evolution reaction photocatalysts. The activity of TMDs mainly depends on their exposed edges because the basal planes are catalytically inactive; thus, the conversion of the basal planes to catalytically active sites is a current challenge. The doping of transition metals into the MoS2 system is a fruitful way to activate the basal plane surfaces, making them catalytically active. Herein, we report few-layered copper-doped MoS2 nanosheets decorated on CdS nanorods (FCM/CdS), which are prepared by a simple method. The photocatalytic activity of the as-synthesized FCM/CdS composites was assessed by the splitting of water to generate H2 under simulated solar light irradiation in the presence of lactic acid as a hole (h+) scavenger. The extraordinary hydrogen production rate of 194.18 μmol h-1, a 52-fold enhancement compared to that of bare CdS, arises from the synergistic effect of the few-layered MoS2 and the metal doping, which leads to the effective separation of photogenerated charge carriers and improves the surface shuttling properties for efficient H2 production. The exceptional photocatalytic activity of FCM/CdS nanocomposites results from the improved edge sites, enhanced electronic conductivity, and the presence of new active sites. Furthermore, the observed H2 evolution rate was much higher than those for the individual few-layered MoS2-assisted CdS (FM/CdS) photocatalysts. The H2 production rate achieved with our MoS2-based CdS photocatalyst for water splitting under solar irradiation has been the highest observed to date. Consequently, considering the low cost and high efficiency of this system, it has enormous potential for use as a photocatalyst in various fields.

AB - The development of efficient, cost-effective, clean, and renewable ways to generate hydrogen is crucial to fulfill energy demand and relieve environmental concerns. The layered nanostructures of two-dimensional transition metal dichalcogenides (TMDs) are promising non-precious and noble-metal-free materials for use as hydrogen evolution reaction photocatalysts. The activity of TMDs mainly depends on their exposed edges because the basal planes are catalytically inactive; thus, the conversion of the basal planes to catalytically active sites is a current challenge. The doping of transition metals into the MoS2 system is a fruitful way to activate the basal plane surfaces, making them catalytically active. Herein, we report few-layered copper-doped MoS2 nanosheets decorated on CdS nanorods (FCM/CdS), which are prepared by a simple method. The photocatalytic activity of the as-synthesized FCM/CdS composites was assessed by the splitting of water to generate H2 under simulated solar light irradiation in the presence of lactic acid as a hole (h+) scavenger. The extraordinary hydrogen production rate of 194.18 μmol h-1, a 52-fold enhancement compared to that of bare CdS, arises from the synergistic effect of the few-layered MoS2 and the metal doping, which leads to the effective separation of photogenerated charge carriers and improves the surface shuttling properties for efficient H2 production. The exceptional photocatalytic activity of FCM/CdS nanocomposites results from the improved edge sites, enhanced electronic conductivity, and the presence of new active sites. Furthermore, the observed H2 evolution rate was much higher than those for the individual few-layered MoS2-assisted CdS (FM/CdS) photocatalysts. The H2 production rate achieved with our MoS2-based CdS photocatalyst for water splitting under solar irradiation has been the highest observed to date. Consequently, considering the low cost and high efficiency of this system, it has enormous potential for use as a photocatalyst in various fields.

UR - http://www.scopus.com/inward/record.url?scp=85031104883&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85031104883&partnerID=8YFLogxK

U2 - 10.1039/c7ta06556f

DO - 10.1039/c7ta06556f

M3 - Article

AN - SCOPUS:85031104883

VL - 5

SP - 20851

EP - 20859

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

SN - 2050-7488

IS - 39

ER -