Plasmonic-induced overgrowth of amorphous molybdenum sulfide on nanoporous gold : an ambient synthesis method of hybrid nanoparticles with enhanced electrocatalytic activity

Hybrid materials of earth abundant transition metal dichalcogenides and noble metal nanoparticles, such as molybdenum sulfide (MoSx) and gold nanoparticles, exhibit synergistic effects that can enhance electrocatalytic reactions. However, most current hybrid MoSx-gold synthesis requires an energy in...

Full description

Saved in:
Bibliographic Details
Main Authors: Phan-Quang, Gia Chuong, Yang, Zhe, Koh, Charlynn Sher Lin, Sim, Howard Yi Fan, Leong, Shi Xuan, Ling, Xing Yi
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2020
Subjects:
Online Access:https://hdl.handle.net/10356/143427
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-143427
record_format dspace
spelling sg-ntu-dr.10356-1434272023-02-28T19:28:51Z Plasmonic-induced overgrowth of amorphous molybdenum sulfide on nanoporous gold : an ambient synthesis method of hybrid nanoparticles with enhanced electrocatalytic activity Phan-Quang, Gia Chuong Yang, Zhe Koh, Charlynn Sher Lin Sim, Howard Yi Fan Leong, Shi Xuan Ling, Xing Yi School of Physical and Mathematical Sciences Science::Physics Emerging Directions in Plasmonics Hybrid Materials Hybrid materials of earth abundant transition metal dichalcogenides and noble metal nanoparticles, such as molybdenum sulfide (MoSx) and gold nanoparticles, exhibit synergistic effects that can enhance electrocatalytic reactions. However, most current hybrid MoSx-gold synthesis requires an energy intensive heat source of >500 °C or chemical plating to achieve deposition of MoSx on the gold surface. Herein, we demonstrate the direct overgrowth of MoSx over colloidal nanoporous gold (NPG), conducted feasibly under ambient conditions, to form hybrid particles with enhanced electrocatalytic performance toward hydrogen evolution reaction. Our strategy exploits the localized surface plasmon resonance-mediated photothermal heating of NPG to achieve >230 °C surface temperature, which induces the decomposition of the (NH4)2MoS4 precursor and direct overgrowth of MoSx over NPG. By tuning the concentration ratio between the precursor and NPG, the amount of MoSx particles deposited can be systematically controlled from 0.5% to 2% of the Mo/(Au + Mo) ratio. Importantly, we find that the hybrid particles exhibit higher bridging and an apical S to terminal S atomic ratio than pure molybdenum sulfide, which gives rise to their enhanced electrocatalytic performance for hydrogen evolution reaction. We demonstrate that hybrid MoSx-NPG exhibits >30 mV lower onset potential and a 1.7-fold lower Tafel slope as compared to pure MoSx. Our methodology provides an energy- and cost-efficient synthesis pathway, which can be extended to the synthesis of various functional hybrid structures with unique properties for catalysis and sensing applications. Ministry of Education (MOE) Nanyang Technological University Published version X. Y. Ling acknowledges Singapore Ministry of Education, Tier 1 (No. RG11/18) and Tier 2 (No. MOE2016-T2-1-043) grants. G. C. Phan-Quang, C. S. L. Koh, and S. X. Leong acknowledge the Nanyang President’s Graduate Scholarship. 2020-09-01T02:21:35Z 2020-09-01T02:21:35Z 2019 Journal Article Phan-Quang, G. C., Yang, Z., Koh, C. S. L., Sim, H. Y. F., Leong, S. X., & Ling, X. Y. (2019). Plasmonic-induced overgrowth of amorphous molybdenum sulfide on nanoporous gold : an ambient synthesis method of hybrid nanoparticles with enhanced electrocatalytic activity. The Journal of Chemical Physics, 151(24), 244709-. doi:10.1063/1.5130649 0021-9606 https://hdl.handle.net/10356/143427 10.1063/1.5130649 31893908 2-s2.0-85077382439 24 151 en The Journal of Chemical Physics © 2019 Author(s). All rights reserved. This paper was published by American Institute of Physics Publishing in The Journal of Chemical Physics and is made available with permission of Author(s). application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
Emerging Directions in Plasmonics
Hybrid Materials
spellingShingle Science::Physics
Emerging Directions in Plasmonics
Hybrid Materials
Phan-Quang, Gia Chuong
Yang, Zhe
Koh, Charlynn Sher Lin
Sim, Howard Yi Fan
Leong, Shi Xuan
Ling, Xing Yi
Plasmonic-induced overgrowth of amorphous molybdenum sulfide on nanoporous gold : an ambient synthesis method of hybrid nanoparticles with enhanced electrocatalytic activity
description Hybrid materials of earth abundant transition metal dichalcogenides and noble metal nanoparticles, such as molybdenum sulfide (MoSx) and gold nanoparticles, exhibit synergistic effects that can enhance electrocatalytic reactions. However, most current hybrid MoSx-gold synthesis requires an energy intensive heat source of >500 °C or chemical plating to achieve deposition of MoSx on the gold surface. Herein, we demonstrate the direct overgrowth of MoSx over colloidal nanoporous gold (NPG), conducted feasibly under ambient conditions, to form hybrid particles with enhanced electrocatalytic performance toward hydrogen evolution reaction. Our strategy exploits the localized surface plasmon resonance-mediated photothermal heating of NPG to achieve >230 °C surface temperature, which induces the decomposition of the (NH4)2MoS4 precursor and direct overgrowth of MoSx over NPG. By tuning the concentration ratio between the precursor and NPG, the amount of MoSx particles deposited can be systematically controlled from 0.5% to 2% of the Mo/(Au + Mo) ratio. Importantly, we find that the hybrid particles exhibit higher bridging and an apical S to terminal S atomic ratio than pure molybdenum sulfide, which gives rise to their enhanced electrocatalytic performance for hydrogen evolution reaction. We demonstrate that hybrid MoSx-NPG exhibits >30 mV lower onset potential and a 1.7-fold lower Tafel slope as compared to pure MoSx. Our methodology provides an energy- and cost-efficient synthesis pathway, which can be extended to the synthesis of various functional hybrid structures with unique properties for catalysis and sensing applications.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Phan-Quang, Gia Chuong
Yang, Zhe
Koh, Charlynn Sher Lin
Sim, Howard Yi Fan
Leong, Shi Xuan
Ling, Xing Yi
format Article
author Phan-Quang, Gia Chuong
Yang, Zhe
Koh, Charlynn Sher Lin
Sim, Howard Yi Fan
Leong, Shi Xuan
Ling, Xing Yi
author_sort Phan-Quang, Gia Chuong
title Plasmonic-induced overgrowth of amorphous molybdenum sulfide on nanoporous gold : an ambient synthesis method of hybrid nanoparticles with enhanced electrocatalytic activity
title_short Plasmonic-induced overgrowth of amorphous molybdenum sulfide on nanoporous gold : an ambient synthesis method of hybrid nanoparticles with enhanced electrocatalytic activity
title_full Plasmonic-induced overgrowth of amorphous molybdenum sulfide on nanoporous gold : an ambient synthesis method of hybrid nanoparticles with enhanced electrocatalytic activity
title_fullStr Plasmonic-induced overgrowth of amorphous molybdenum sulfide on nanoporous gold : an ambient synthesis method of hybrid nanoparticles with enhanced electrocatalytic activity
title_full_unstemmed Plasmonic-induced overgrowth of amorphous molybdenum sulfide on nanoporous gold : an ambient synthesis method of hybrid nanoparticles with enhanced electrocatalytic activity
title_sort plasmonic-induced overgrowth of amorphous molybdenum sulfide on nanoporous gold : an ambient synthesis method of hybrid nanoparticles with enhanced electrocatalytic activity
publishDate 2020
url https://hdl.handle.net/10356/143427
_version_ 1759858366419566592