Efficient ethanol oxidation by hemoglobin-capped gold nanoclusters: The critical role of Fe in the heme group as an oxophilic metal active site

Efficient ethanol oxidation by hemoglobin-capped gold nanoclusters: The critical role of Fe in the heme group as an oxophilic metal active site

Hemoglobin (Hb)-capped gold nanoclusters (Hb/AuNCs) are synthesized, characterized and introduced as durable and high-performance ethanol oxidation electrocatalysts with superior mass and specific activities. The experimental results and computational analysis suggest that the key reasons for the ex...

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Main Authors: Morteza Sarparast, Fatemeh Molaabasi, Reza Ghazfar, Mona Maleka Ashtiani, Mohammad Balooch Qarai, Avat (Arman) Taherpour, Saeed Pourjafari Amyab, Mojtaba Shamsipur
Format: Article
Language:English
Published: Elsevier 2019-06-01
Series:Electrochemistry Communications
Online Access:http://www.sciencedirect.com/science/article/pii/S1388248119301122
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spelling doaj-54431e9486d244d0be42cf14174c4d802020-11-24T21:21:29ZengElsevierElectrochemistry Communications1388-24812019-06-011034247Efficient ethanol oxidation by hemoglobin-capped gold nanoclusters: The critical role of Fe in the heme group as an oxophilic metal active siteMorteza Sarparast0Fatemeh Molaabasi1Reza Ghazfar2Mona Maleka Ashtiani3Mohammad Balooch Qarai4Avat (Arman) Taherpour5Saeed Pourjafari Amyab6Mojtaba Shamsipur7Department of Chemistry, Michigan State University, East Lansing, MI 48824-1322, USADepartment of Biomaterials and Tissue Engineering, Motamed Cancer Institute, ACECR, Tehran, Iran; Department of Chemistry, Tarbiat Modares University, Tehran, IranDepartment of Chemistry, Michigan State University, East Lansing, MI 48824-1322, USADepartment of Chemistry, Michigan State University, East Lansing, MI 48824-1322, USADepartment of Chemistry, Temple University, Philadelphia, PA 19122, USADepartment of Chemistry, Razi University, Kermanshah, IranDepartment of Physics, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, IranDepartment of Chemistry, Razi University, Kermanshah, Iran; Corresponding author.Hemoglobin (Hb)-capped gold nanoclusters (Hb/AuNCs) are synthesized, characterized and introduced as durable and high-performance ethanol oxidation electrocatalysts with superior mass and specific activities. The experimental results and computational analysis suggest that the key reasons for the excellent catalytic activity of Hb/AuNCs are: (i) Fe atoms in the heme group of Hb acting as oxophilic metal active centers, via metal–metal bond formation with the AuNCs and (ii) the presence of a protein shell effectively hindering the Ostwald ripening and aggregation of AuNCs. Keywords: Hemoglobin capped gold nanocluster, Synthesis and characterization, Excellent catalytic property, Direct alcohol fuel cell, High performance ethanol oxidationhttp://www.sciencedirect.com/science/article/pii/S1388248119301122
collection DOAJ
language English
format Article
sources DOAJ
author Morteza Sarparast
Fatemeh Molaabasi
Reza Ghazfar
Mona Maleka Ashtiani
Mohammad Balooch Qarai
Avat (Arman) Taherpour
Saeed Pourjafari Amyab
Mojtaba Shamsipur
spellingShingle Morteza Sarparast
Fatemeh Molaabasi
Reza Ghazfar
Mona Maleka Ashtiani
Mohammad Balooch Qarai
Avat (Arman) Taherpour
Saeed Pourjafari Amyab
Mojtaba Shamsipur
Efficient ethanol oxidation by hemoglobin-capped gold nanoclusters: The critical role of Fe in the heme group as an oxophilic metal active site
Electrochemistry Communications
author_facet Morteza Sarparast
Fatemeh Molaabasi
Reza Ghazfar
Mona Maleka Ashtiani
Mohammad Balooch Qarai
Avat (Arman) Taherpour
Saeed Pourjafari Amyab
Mojtaba Shamsipur
author_sort Morteza Sarparast
title Efficient ethanol oxidation by hemoglobin-capped gold nanoclusters: The critical role of Fe in the heme group as an oxophilic metal active site
title_short Efficient ethanol oxidation by hemoglobin-capped gold nanoclusters: The critical role of Fe in the heme group as an oxophilic metal active site
title_full Efficient ethanol oxidation by hemoglobin-capped gold nanoclusters: The critical role of Fe in the heme group as an oxophilic metal active site
title_fullStr Efficient ethanol oxidation by hemoglobin-capped gold nanoclusters: The critical role of Fe in the heme group as an oxophilic metal active site
title_full_unstemmed Efficient ethanol oxidation by hemoglobin-capped gold nanoclusters: The critical role of Fe in the heme group as an oxophilic metal active site
title_sort efficient ethanol oxidation by hemoglobin-capped gold nanoclusters: the critical role of fe in the heme group as an oxophilic metal active site
publisher Elsevier
series Electrochemistry Communications
issn 1388-2481
publishDate 2019-06-01
description Hemoglobin (Hb)-capped gold nanoclusters (Hb/AuNCs) are synthesized, characterized and introduced as durable and high-performance ethanol oxidation electrocatalysts with superior mass and specific activities. The experimental results and computational analysis suggest that the key reasons for the excellent catalytic activity of Hb/AuNCs are: (i) Fe atoms in the heme group of Hb acting as oxophilic metal active centers, via metal–metal bond formation with the AuNCs and (ii) the presence of a protein shell effectively hindering the Ostwald ripening and aggregation of AuNCs. Keywords: Hemoglobin capped gold nanocluster, Synthesis and characterization, Excellent catalytic property, Direct alcohol fuel cell, High performance ethanol oxidation
url http://www.sciencedirect.com/science/article/pii/S1388248119301122
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