Hydrothermal synthesis of monoclinic WO3 nanoplates and nanorods used as an electrocatalyst for hydrogen evolution reactions from water

Monoclinic WO3 (m-WO3) nanoplates and nanorods were successfully synthesized by a simple hydrothermal process using sodium tungstate dihydrate (Na2WO4·2H2O), ammonium nitrate (NH4NO3) and polyethylene glycol (PEG) as initial precursors. Phase, morphologies and electrochemical properties of the produ...

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Main Authors: Ham D.J., Phuruangrat A., Thongtem S., Lee J.S.
Format: Article
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-78149498974&partnerID=40&md5=6d9a5e7bdbac8562587bbec79d4926b2
http://cmuir.cmu.ac.th/handle/6653943832/6179
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-61792014-08-30T03:23:55Z Hydrothermal synthesis of monoclinic WO3 nanoplates and nanorods used as an electrocatalyst for hydrogen evolution reactions from water Ham D.J. Phuruangrat A. Thongtem S. Lee J.S. Monoclinic WO3 (m-WO3) nanoplates and nanorods were successfully synthesized by a simple hydrothermal process using sodium tungstate dihydrate (Na2WO4·2H2O), ammonium nitrate (NH4NO3) and polyethylene glycol (PEG) as initial precursors. Phase, morphologies and electrochemical properties of the products were characterized by X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM, TEM), high-resolution transmission electron microscopy (HRTEM), cyclic voltammetry (CV) and linear sweep voltammetry (LSV). The effect of NH4NO3 concentration on the formation of the pure phase of m-WO3 nanomaterial was studied. The product synthesized under NH4NO3-free condition was pure orthorhombic WO3·0.33H2O (o-WO3·0.33H2O) phase. By adding and increasing the amount of NH4NO3 to the solution, m-WO3 phase started to form and became pure m-WO3 phase when 1.50g NH4NO3 was used. The morphology of m-WO3 was nanoplates, and became nanorods by PEG adding. The nanostructured m-WO3 showed much higher electrocatalytic activity for hydrogen evolution from water than that of the commercial bulk m-WO3, including the m-WO3 nanorods with slightly better than the m-WO3 nanoplates. © 2010 Elsevier B.V. 2014-08-30T03:23:55Z 2014-08-30T03:23:55Z 2010 Article 13858947 10.1016/j.cej.2010.09.003 CMEJA http://www.scopus.com/inward/record.url?eid=2-s2.0-78149498974&partnerID=40&md5=6d9a5e7bdbac8562587bbec79d4926b2 http://cmuir.cmu.ac.th/handle/6653943832/6179 English
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description Monoclinic WO3 (m-WO3) nanoplates and nanorods were successfully synthesized by a simple hydrothermal process using sodium tungstate dihydrate (Na2WO4·2H2O), ammonium nitrate (NH4NO3) and polyethylene glycol (PEG) as initial precursors. Phase, morphologies and electrochemical properties of the products were characterized by X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM, TEM), high-resolution transmission electron microscopy (HRTEM), cyclic voltammetry (CV) and linear sweep voltammetry (LSV). The effect of NH4NO3 concentration on the formation of the pure phase of m-WO3 nanomaterial was studied. The product synthesized under NH4NO3-free condition was pure orthorhombic WO3·0.33H2O (o-WO3·0.33H2O) phase. By adding and increasing the amount of NH4NO3 to the solution, m-WO3 phase started to form and became pure m-WO3 phase when 1.50g NH4NO3 was used. The morphology of m-WO3 was nanoplates, and became nanorods by PEG adding. The nanostructured m-WO3 showed much higher electrocatalytic activity for hydrogen evolution from water than that of the commercial bulk m-WO3, including the m-WO3 nanorods with slightly better than the m-WO3 nanoplates. © 2010 Elsevier B.V.
format Article
author Ham D.J.
Phuruangrat A.
Thongtem S.
Lee J.S.
spellingShingle Ham D.J.
Phuruangrat A.
Thongtem S.
Lee J.S.
Hydrothermal synthesis of monoclinic WO3 nanoplates and nanorods used as an electrocatalyst for hydrogen evolution reactions from water
author_facet Ham D.J.
Phuruangrat A.
Thongtem S.
Lee J.S.
author_sort Ham D.J.
title Hydrothermal synthesis of monoclinic WO3 nanoplates and nanorods used as an electrocatalyst for hydrogen evolution reactions from water
title_short Hydrothermal synthesis of monoclinic WO3 nanoplates and nanorods used as an electrocatalyst for hydrogen evolution reactions from water
title_full Hydrothermal synthesis of monoclinic WO3 nanoplates and nanorods used as an electrocatalyst for hydrogen evolution reactions from water
title_fullStr Hydrothermal synthesis of monoclinic WO3 nanoplates and nanorods used as an electrocatalyst for hydrogen evolution reactions from water
title_full_unstemmed Hydrothermal synthesis of monoclinic WO3 nanoplates and nanorods used as an electrocatalyst for hydrogen evolution reactions from water
title_sort hydrothermal synthesis of monoclinic wo3 nanoplates and nanorods used as an electrocatalyst for hydrogen evolution reactions from water
publishDate 2014
url http://www.scopus.com/inward/record.url?eid=2-s2.0-78149498974&partnerID=40&md5=6d9a5e7bdbac8562587bbec79d4926b2
http://cmuir.cmu.ac.th/handle/6653943832/6179
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