Electrocatalytic hydrogen redox chemistry on gold nanoparticles

Electrocatalytic proton reduction leading to the formation of adsorbed molecular hydrogen on gold nanoparticles of 1-3 and 14-16 nm diameter stabilized by 1-mercapto-undecane-11-tetra(ethyleneglycol) has been demonstrated by cyclic voltammetry using a hanging mercury drop electrode. The nanoparticle...

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Autores principales:	Brust, M., Gordillo, G.J.
Formato:	JOUR
Materias:	Active site Adsorbed hydrogen Aqueous dispersions Base electrolytes Bulk materials Discrete numbers Electrocatalytic Gold electrodes Gold Nanoparticles Hanging mercury drop electrodes Molecular hydrogen Potential sweep Proton reduction Redox chemistry Reduction process Surface layers Cyclic voltammetry Electrocatalysis Gold Hydrogen Mercury (metal) Protons Reduction Nanoparticles 1 mercapto undecane 11 tetra(ethyleneglycol) electrolyte ethylene glycol gold nanoparticle hydrogen unclassified drug article catalyst cyclic potentiometry electrochemistry electrode oxidation reduction reaction
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00027863_v134_n7_p3318_Brust
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00027863_v134_n7_p3318_Brust
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spelling	todo:paper_00027863_v134_n7_p3318_Brust2023-10-03T13:54:20Z Electrocatalytic hydrogen redox chemistry on gold nanoparticles Brust, M. Gordillo, G.J. Active site Adsorbed hydrogen Aqueous dispersions Base electrolytes Bulk materials Discrete numbers Electrocatalytic Gold electrodes Gold Nanoparticles Hanging mercury drop electrodes Molecular hydrogen Potential sweep Proton reduction Redox chemistry Reduction process Surface layers Cyclic voltammetry Electrocatalysis Gold Hydrogen Mercury (metal) Protons Reduction Nanoparticles 1 mercapto undecane 11 tetra(ethyleneglycol) electrolyte ethylene glycol gold nanoparticle hydrogen unclassified drug article catalyst cyclic potentiometry electrochemistry electrode oxidation reduction reaction Electrocatalytic proton reduction leading to the formation of adsorbed molecular hydrogen on gold nanoparticles of 1-3 and 14-16 nm diameter stabilized by 1-mercapto-undecane-11-tetra(ethyleneglycol) has been demonstrated by cyclic voltammetry using a hanging mercury drop electrode. The nanoparticles were adsorbed to the electrode from aqueous dispersion and formed robust surface layers transferrable to fresh base electrolyte solutions. Unique electrocatalytic proton redox chemistry was observed that has no comparable counterpart in the electrochemistry of bulk gold electrodes. Depending on size, the nanoparticles have a discrete number of electrocatalytically active sites for the two-electron/two-proton reduction process. The adsorbed hydrogen formed is oxidized with the reverse potential sweep. These findings represent a new example of qualitative different behavior of nanoparticles in comparison with the corresponding bulk material. © 2012 American Chemical Society. Fil:Gordillo, G.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00027863_v134_n7_p3318_Brust
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Active site Adsorbed hydrogen Aqueous dispersions Base electrolytes Bulk materials Discrete numbers Electrocatalytic Gold electrodes Gold Nanoparticles Hanging mercury drop electrodes Molecular hydrogen Potential sweep Proton reduction Redox chemistry Reduction process Surface layers Cyclic voltammetry Electrocatalysis Gold Hydrogen Mercury (metal) Protons Reduction Nanoparticles 1 mercapto undecane 11 tetra(ethyleneglycol) electrolyte ethylene glycol gold nanoparticle hydrogen unclassified drug article catalyst cyclic potentiometry electrochemistry electrode oxidation reduction reaction
spellingShingle	Active site Adsorbed hydrogen Aqueous dispersions Base electrolytes Bulk materials Discrete numbers Electrocatalytic Gold electrodes Gold Nanoparticles Hanging mercury drop electrodes Molecular hydrogen Potential sweep Proton reduction Redox chemistry Reduction process Surface layers Cyclic voltammetry Electrocatalysis Gold Hydrogen Mercury (metal) Protons Reduction Nanoparticles 1 mercapto undecane 11 tetra(ethyleneglycol) electrolyte ethylene glycol gold nanoparticle hydrogen unclassified drug article catalyst cyclic potentiometry electrochemistry electrode oxidation reduction reaction Brust, M. Gordillo, G.J. Electrocatalytic hydrogen redox chemistry on gold nanoparticles
topic_facet	Active site Adsorbed hydrogen Aqueous dispersions Base electrolytes Bulk materials Discrete numbers Electrocatalytic Gold electrodes Gold Nanoparticles Hanging mercury drop electrodes Molecular hydrogen Potential sweep Proton reduction Redox chemistry Reduction process Surface layers Cyclic voltammetry Electrocatalysis Gold Hydrogen Mercury (metal) Protons Reduction Nanoparticles 1 mercapto undecane 11 tetra(ethyleneglycol) electrolyte ethylene glycol gold nanoparticle hydrogen unclassified drug article catalyst cyclic potentiometry electrochemistry electrode oxidation reduction reaction
description	Electrocatalytic proton reduction leading to the formation of adsorbed molecular hydrogen on gold nanoparticles of 1-3 and 14-16 nm diameter stabilized by 1-mercapto-undecane-11-tetra(ethyleneglycol) has been demonstrated by cyclic voltammetry using a hanging mercury drop electrode. The nanoparticles were adsorbed to the electrode from aqueous dispersion and formed robust surface layers transferrable to fresh base electrolyte solutions. Unique electrocatalytic proton redox chemistry was observed that has no comparable counterpart in the electrochemistry of bulk gold electrodes. Depending on size, the nanoparticles have a discrete number of electrocatalytically active sites for the two-electron/two-proton reduction process. The adsorbed hydrogen formed is oxidized with the reverse potential sweep. These findings represent a new example of qualitative different behavior of nanoparticles in comparison with the corresponding bulk material. © 2012 American Chemical Society.
format	JOUR
author	Brust, M. Gordillo, G.J.
author_facet	Brust, M. Gordillo, G.J.
author_sort	Brust, M.
title	Electrocatalytic hydrogen redox chemistry on gold nanoparticles
title_short	Electrocatalytic hydrogen redox chemistry on gold nanoparticles
title_full	Electrocatalytic hydrogen redox chemistry on gold nanoparticles
title_fullStr	Electrocatalytic hydrogen redox chemistry on gold nanoparticles
title_full_unstemmed	Electrocatalytic hydrogen redox chemistry on gold nanoparticles
title_sort	electrocatalytic hydrogen redox chemistry on gold nanoparticles
url	http://hdl.handle.net/20.500.12110/paper_00027863_v134_n7_p3318_Brust
work_keys_str_mv	AT brustm electrocatalytichydrogenredoxchemistryongoldnanoparticles AT gordillogj electrocatalytichydrogenredoxchemistryongoldnanoparticles
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Electrocatalytic hydrogen redox chemistry on gold nanoparticles

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