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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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027863_v134_n7_p3318_Brust http://hdl.handle.net/20.500.12110/paper_00027863_v134_n7_p3318_Brust |
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paper:paper_00027863_v134_n7_p3318_Brust2023-06-08T14:22:51Z Electrocatalytic hydrogen redox chemistry on gold nanoparticles Gordillo, Gabriel Jorge 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. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027863_v134_n7_p3318_Brust 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 Gordillo, Gabriel Jorge 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. |
author |
Gordillo, Gabriel Jorge |
author_facet |
Gordillo, Gabriel Jorge |
author_sort |
Gordillo, Gabriel Jorge |
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 |
publishDate |
2012 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027863_v134_n7_p3318_Brust http://hdl.handle.net/20.500.12110/paper_00027863_v134_n7_p3318_Brust |
work_keys_str_mv |
AT gordillogabrieljorge electrocatalytichydrogenredoxchemistryongoldnanoparticles |
_version_ |
1768542863663038464 |