Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction

Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction

Quasi-homogeneous ligand-protected gold nanoclusters (Au NCs) with atomic precision and well-defined structure offer a great opportunity for exploring the catalytic nature of nanogold catalysts at a molecular level. Herein, using real-time electrospray ionization mass spectrometry (ESI-MS), we have...

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Main Authors: Nasaruddin, Ricca Rahman, Yao, Qiaofeng, Chen, Tiankai, Hülsey, Max J., Yan, Ning, Xie, Jianping
Format: Conference or Workshop Item
Language:English
English
Published: 2019
Subjects:
QD Chemistry
TP Chemical technology
TP155 Chemical engineering
Online Access:http://irep.iium.edu.my/78191/
http://irep.iium.edu.my/78191/3/78191%20schedule.pdf
http://irep.iium.edu.my/78191/4/78191%20Structural%20transformation%20and%20ligand%20dynamic.pdf
id iium-78191
recordtype eprints
spelling iium-781912020-03-06T04:09:14Z http://irep.iium.edu.my/78191/ Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction Nasaruddin, Ricca Rahman Yao, Qiaofeng Chen, Tiankai Hülsey, Max J. Yan, Ning Xie, Jianping QD Chemistry TP Chemical technology TP155 Chemical engineering Quasi-homogeneous ligand-protected gold nanoclusters (Au NCs) with atomic precision and well-defined structure offer a great opportunity for exploring the catalytic nature of nanogold catalysts at a molecular level. Herein, using real-time electrospray ionization mass spectrometry (ESI-MS), we have successfully identified the desorption and re-adsorption of p-mercaptobenzoic acid (p-MBA) ligands from Au25(p-MBA)18 NC catalysts during the hydrogenation of 4-nitrophenol in solution. This ligand dynamic (desorption and re-adsorption) would initiate structural transformation of Au25(p-MBA)18 NC catalysts during the reaction, forming a mixture of smaller Au NCs (Au23(p-MBA)16 as the major species) at the beginning of catalytic reaction, which could further be transformed into larger Au NCs (Au26(p-MBA)19 as the major species). The adsorption of hydrides (from NaBH4) is identified as the determining factor that could induce the ligand dynamic and structural transformation of NC catalysts. This study provides fundamental insights into the catalytic nature of Au NCs, including catalytic mechanism, active species and stability of Au NC catalysts during a catalytic reaction. 2019 Conference or Workshop Item NonPeerReviewed application/pdf en http://irep.iium.edu.my/78191/3/78191%20schedule.pdf application/pdf en http://irep.iium.edu.my/78191/4/78191%20Structural%20transformation%20and%20ligand%20dynamic.pdf Nasaruddin, Ricca Rahman and Yao, Qiaofeng and Chen, Tiankai and Hülsey, Max J. and Yan, Ning and Xie, Jianping (2019) Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction. In: Southeast Asia Catalysis Conference, 23rd - 24th May 2019, Singapore. (Unpublished)
repository_type Digital Repository
institution_category Local University
institution International Islamic University Malaysia
building IIUM Repository
collection Online Access
language English
English
topic QD Chemistry
TP Chemical technology
TP155 Chemical engineering
spellingShingle QD Chemistry
TP Chemical technology
TP155 Chemical engineering
Nasaruddin, Ricca Rahman
Yao, Qiaofeng
Chen, Tiankai
Hülsey, Max J.
Yan, Ning
Xie, Jianping
Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction
description Quasi-homogeneous ligand-protected gold nanoclusters (Au NCs) with atomic precision and well-defined structure offer a great opportunity for exploring the catalytic nature of nanogold catalysts at a molecular level. Herein, using real-time electrospray ionization mass spectrometry (ESI-MS), we have successfully identified the desorption and re-adsorption of p-mercaptobenzoic acid (p-MBA) ligands from Au25(p-MBA)18 NC catalysts during the hydrogenation of 4-nitrophenol in solution. This ligand dynamic (desorption and re-adsorption) would initiate structural transformation of Au25(p-MBA)18 NC catalysts during the reaction, forming a mixture of smaller Au NCs (Au23(p-MBA)16 as the major species) at the beginning of catalytic reaction, which could further be transformed into larger Au NCs (Au26(p-MBA)19 as the major species). The adsorption of hydrides (from NaBH4) is identified as the determining factor that could induce the ligand dynamic and structural transformation of NC catalysts. This study provides fundamental insights into the catalytic nature of Au NCs, including catalytic mechanism, active species and stability of Au NC catalysts during a catalytic reaction.
format Conference or Workshop Item
author Nasaruddin, Ricca Rahman
Yao, Qiaofeng
Chen, Tiankai
Hülsey, Max J.
Yan, Ning
Xie, Jianping
author_facet Nasaruddin, Ricca Rahman
Yao, Qiaofeng
Chen, Tiankai
Hülsey, Max J.
Yan, Ning
Xie, Jianping
author_sort Nasaruddin, Ricca Rahman
title Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction
title_short Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction
title_full Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction
title_fullStr Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction
title_full_unstemmed Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction
title_sort structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction
publishDate 2019
url http://irep.iium.edu.my/78191/
http://irep.iium.edu.my/78191/3/78191%20schedule.pdf
http://irep.iium.edu.my/78191/4/78191%20Structural%20transformation%20and%20ligand%20dynamic.pdf
first_indexed 2023-09-18T21:50:12Z
last_indexed 2023-09-18T21:50:12Z
_version_ 1777413718078914560

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