Double 2-dimensional H2-evoluting catalyst tipped photocatalyst nanowires: A new avenue for high-efficiency solar to H2 generation

Kan Zhang, Shifeng Qian, Wanjung Kim, Jung Kyu Kim, Xiaowei Sheng, Jun Young Lee, Jong Hyeok Park

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Asymmetric or symmetric metal-tipped one-dimensional (1D) semiconductors are promising systems for efficient photocatalytic reactions such as solar-to-fuel conversion because of ultrafast exciton dynamics that arise at the specific heterostructure interface. However, synthesizing such unique nanostructures experiencing colloid growth on noble metal that has faced a formidable challenge in practical application because these synthesis conditions are not suitable to deploy in mass production. Here, we report the gram-scale mass production of symmetric MoS2-tipped CdS nanowires (S-MtC NWs) via edge-terminated attachment in a binary solvent. The factors influencing the formation of symmetric heterostructures are investigated by varying the types of precursors, initial concentration, and solvent composition. Under visible-light irradiation (λ≥420 nm), the S-MtC NWs exhibit superior photocatalytic H2 evolution activity (12.6 mmol/g/h) compared to common Pt/CdS NWs (2.6 mmol/g/h), corresponding to an apparent quantum yield of 37.6% at 420 nm. This impressive photocatalytic ability is ascribed to spatially separated redox-active sites in the S-MtC NWs, in which the reduction and oxidation sites are at the MoS2 tip and the CdS stem, respectively. Additionally, it is found that the length of CdS NWs as higher aspect ratio as possible could get better photocatalyst H2 performance. The symmetry of 2D MoS2 tips and 1D CdS NWs may provide advanced avenues for specific co-catalyst decoration, enabling co-catalysts to be selectively located at reduction or oxidation sites for other targeted solar artificial syntheses.

Original languageEnglish
Pages (from-to)481-490
Number of pages10
JournalNano Energy
Volume34
DOIs
Publication statusPublished - 2017 Apr 1

Fingerprint

Photocatalysts
Nanowires
Catalysts
Heterojunctions
Oxidation
Colloids
Quantum yield
Precious metals
Excitons
Aspect ratio
Nanostructures
Metals
Irradiation
Semiconductor materials
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

Cite this

Zhang, Kan ; Qian, Shifeng ; Kim, Wanjung ; Kim, Jung Kyu ; Sheng, Xiaowei ; Lee, Jun Young ; Park, Jong Hyeok. / Double 2-dimensional H2-evoluting catalyst tipped photocatalyst nanowires : A new avenue for high-efficiency solar to H2 generation. In: Nano Energy. 2017 ; Vol. 34. pp. 481-490.
@article{809822843f70418dbae5cbb5b124caf0,
title = "Double 2-dimensional H2-evoluting catalyst tipped photocatalyst nanowires: A new avenue for high-efficiency solar to H2 generation",
abstract = "Asymmetric or symmetric metal-tipped one-dimensional (1D) semiconductors are promising systems for efficient photocatalytic reactions such as solar-to-fuel conversion because of ultrafast exciton dynamics that arise at the specific heterostructure interface. However, synthesizing such unique nanostructures experiencing colloid growth on noble metal that has faced a formidable challenge in practical application because these synthesis conditions are not suitable to deploy in mass production. Here, we report the gram-scale mass production of symmetric MoS2-tipped CdS nanowires (S-MtC NWs) via edge-terminated attachment in a binary solvent. The factors influencing the formation of symmetric heterostructures are investigated by varying the types of precursors, initial concentration, and solvent composition. Under visible-light irradiation (λ≥420 nm), the S-MtC NWs exhibit superior photocatalytic H2 evolution activity (12.6 mmol/g/h) compared to common Pt/CdS NWs (2.6 mmol/g/h), corresponding to an apparent quantum yield of 37.6{\%} at 420 nm. This impressive photocatalytic ability is ascribed to spatially separated redox-active sites in the S-MtC NWs, in which the reduction and oxidation sites are at the MoS2 tip and the CdS stem, respectively. Additionally, it is found that the length of CdS NWs as higher aspect ratio as possible could get better photocatalyst H2 performance. The symmetry of 2D MoS2 tips and 1D CdS NWs may provide advanced avenues for specific co-catalyst decoration, enabling co-catalysts to be selectively located at reduction or oxidation sites for other targeted solar artificial syntheses.",
author = "Kan Zhang and Shifeng Qian and Wanjung Kim and Kim, {Jung Kyu} and Xiaowei Sheng and Lee, {Jun Young} and Park, {Jong Hyeok}",
year = "2017",
month = "4",
day = "1",
doi = "10.1016/j.nanoen.2017.03.005",
language = "English",
volume = "34",
pages = "481--490",
journal = "Nano Energy",
issn = "2211-2855",
publisher = "Elsevier BV",

}

Double 2-dimensional H2-evoluting catalyst tipped photocatalyst nanowires : A new avenue for high-efficiency solar to H2 generation. / Zhang, Kan; Qian, Shifeng; Kim, Wanjung; Kim, Jung Kyu; Sheng, Xiaowei; Lee, Jun Young; Park, Jong Hyeok.

In: Nano Energy, Vol. 34, 01.04.2017, p. 481-490.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Double 2-dimensional H2-evoluting catalyst tipped photocatalyst nanowires

T2 - A new avenue for high-efficiency solar to H2 generation

AU - Zhang, Kan

AU - Qian, Shifeng

AU - Kim, Wanjung

AU - Kim, Jung Kyu

AU - Sheng, Xiaowei

AU - Lee, Jun Young

AU - Park, Jong Hyeok

PY - 2017/4/1

Y1 - 2017/4/1

N2 - Asymmetric or symmetric metal-tipped one-dimensional (1D) semiconductors are promising systems for efficient photocatalytic reactions such as solar-to-fuel conversion because of ultrafast exciton dynamics that arise at the specific heterostructure interface. However, synthesizing such unique nanostructures experiencing colloid growth on noble metal that has faced a formidable challenge in practical application because these synthesis conditions are not suitable to deploy in mass production. Here, we report the gram-scale mass production of symmetric MoS2-tipped CdS nanowires (S-MtC NWs) via edge-terminated attachment in a binary solvent. The factors influencing the formation of symmetric heterostructures are investigated by varying the types of precursors, initial concentration, and solvent composition. Under visible-light irradiation (λ≥420 nm), the S-MtC NWs exhibit superior photocatalytic H2 evolution activity (12.6 mmol/g/h) compared to common Pt/CdS NWs (2.6 mmol/g/h), corresponding to an apparent quantum yield of 37.6% at 420 nm. This impressive photocatalytic ability is ascribed to spatially separated redox-active sites in the S-MtC NWs, in which the reduction and oxidation sites are at the MoS2 tip and the CdS stem, respectively. Additionally, it is found that the length of CdS NWs as higher aspect ratio as possible could get better photocatalyst H2 performance. The symmetry of 2D MoS2 tips and 1D CdS NWs may provide advanced avenues for specific co-catalyst decoration, enabling co-catalysts to be selectively located at reduction or oxidation sites for other targeted solar artificial syntheses.

AB - Asymmetric or symmetric metal-tipped one-dimensional (1D) semiconductors are promising systems for efficient photocatalytic reactions such as solar-to-fuel conversion because of ultrafast exciton dynamics that arise at the specific heterostructure interface. However, synthesizing such unique nanostructures experiencing colloid growth on noble metal that has faced a formidable challenge in practical application because these synthesis conditions are not suitable to deploy in mass production. Here, we report the gram-scale mass production of symmetric MoS2-tipped CdS nanowires (S-MtC NWs) via edge-terminated attachment in a binary solvent. The factors influencing the formation of symmetric heterostructures are investigated by varying the types of precursors, initial concentration, and solvent composition. Under visible-light irradiation (λ≥420 nm), the S-MtC NWs exhibit superior photocatalytic H2 evolution activity (12.6 mmol/g/h) compared to common Pt/CdS NWs (2.6 mmol/g/h), corresponding to an apparent quantum yield of 37.6% at 420 nm. This impressive photocatalytic ability is ascribed to spatially separated redox-active sites in the S-MtC NWs, in which the reduction and oxidation sites are at the MoS2 tip and the CdS stem, respectively. Additionally, it is found that the length of CdS NWs as higher aspect ratio as possible could get better photocatalyst H2 performance. The symmetry of 2D MoS2 tips and 1D CdS NWs may provide advanced avenues for specific co-catalyst decoration, enabling co-catalysts to be selectively located at reduction or oxidation sites for other targeted solar artificial syntheses.

UR - http://www.scopus.com/inward/record.url?scp=85014778158&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85014778158&partnerID=8YFLogxK

U2 - 10.1016/j.nanoen.2017.03.005

DO - 10.1016/j.nanoen.2017.03.005

M3 - Article

AN - SCOPUS:85014778158

VL - 34

SP - 481

EP - 490

JO - Nano Energy

JF - Nano Energy

SN - 2211-2855

ER -