Nanostructured gold thin film electrode derived from surfactant-free gold nanoparticles for enhanced electrocatalysis
Electrodes composed of nanostructured surfaces have been shown to be promising electrocatalysts, offering enhanced catalytic activity. Gold nanoparticles (AuNPs) are often used to produce such a nanostructured surface. However, these are commonly prepared using a reductant and surfactant, often hind...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-01-01
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| Series: | Electrochemistry Communications |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S138824812200217X |
| _version_ | 1797959165191127040 |
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| author | Yasuhiro Mie Hirotaka Okabe Chitose Mikami Taisei Motomura Naoki Matsuda |
| author_facet | Yasuhiro Mie Hirotaka Okabe Chitose Mikami Taisei Motomura Naoki Matsuda |
| author_sort | Yasuhiro Mie |
| collection | DOAJ |
| description | Electrodes composed of nanostructured surfaces have been shown to be promising electrocatalysts, offering enhanced catalytic activity. Gold nanoparticles (AuNPs) are often used to produce such a nanostructured surface. However, these are commonly prepared using a reductant and surfactant, often hindering the electrocatalytic application of the surface. In the present study, we fabricated a nanostructured gold thin film electrode derived from a solution of AuNPs containing only Au, H, and O, which was prepared by solution plasma processing in the presence of hydrogen peroxide. The concentrated AuNP dispersed aqueous solution was dropped onto the glassy carbon substrate and then dried to form a AuNP thin film at room temperature. The resultant gold film was nanostructured owing to the presence of the AuNPs, could be used directly in electrochemical reactions without pre-treatment (such as surfactant/reductant removal), and gave stable voltammetric responses, indicating its suitability as an electrode material. In addition, the AuNP thin film electrode exhibited enhanced electrocatalytic activity compared with conventional planar gold electrodes, which can be attributed to its surface nanostructure. In particular, the electrocatalytic current in the hydrogen evolution reaction was more than 10 times larger at the nanostructured AuNP thin film electrode than at a planar gold electrode. Further, the AuNP thin film electrode enabled direct electron transfer (DET) between a redox enzyme, neuroglobin, and the electrode surface, while the planar electrode showed no DET response. The results indicate the usefulness of the present AuNP thin film electrode, prepared by a reagent-free process, for various electrocatalytic applications. |
| first_indexed | 2024-04-11T00:29:37Z |
| format | Article |
| id | doaj.art-8683d827aa5b4d658abff31100b4e0c4 |
| institution | Directory Open Access Journal |
| issn | 1388-2481 |
| language | English |
| last_indexed | 2024-04-11T00:29:37Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Electrochemistry Communications |
| spelling | doaj.art-8683d827aa5b4d658abff31100b4e0c42023-01-08T04:13:44ZengElsevierElectrochemistry Communications1388-24812023-01-01146107415Nanostructured gold thin film electrode derived from surfactant-free gold nanoparticles for enhanced electrocatalysisYasuhiro Mie0Hirotaka Okabe1Chitose Mikami2Taisei Motomura3Naoki Matsuda4Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Hokkaido Branch, Sapporo 062-8517, Japan; Corresponding authors.Sensing System Research Center, AIST, Kyushu Branch, 807-1, Shuku-machi, Tosu, Saga 841-0052, JapanBioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Hokkaido Branch, Sapporo 062-8517, JapanSensing System Research Center, AIST, Kyushu Branch, 807-1, Shuku-machi, Tosu, Saga 841-0052, JapanSensing System Research Center, AIST, Kyushu Branch, 807-1, Shuku-machi, Tosu, Saga 841-0052, Japan; Corresponding authors.Electrodes composed of nanostructured surfaces have been shown to be promising electrocatalysts, offering enhanced catalytic activity. Gold nanoparticles (AuNPs) are often used to produce such a nanostructured surface. However, these are commonly prepared using a reductant and surfactant, often hindering the electrocatalytic application of the surface. In the present study, we fabricated a nanostructured gold thin film electrode derived from a solution of AuNPs containing only Au, H, and O, which was prepared by solution plasma processing in the presence of hydrogen peroxide. The concentrated AuNP dispersed aqueous solution was dropped onto the glassy carbon substrate and then dried to form a AuNP thin film at room temperature. The resultant gold film was nanostructured owing to the presence of the AuNPs, could be used directly in electrochemical reactions without pre-treatment (such as surfactant/reductant removal), and gave stable voltammetric responses, indicating its suitability as an electrode material. In addition, the AuNP thin film electrode exhibited enhanced electrocatalytic activity compared with conventional planar gold electrodes, which can be attributed to its surface nanostructure. In particular, the electrocatalytic current in the hydrogen evolution reaction was more than 10 times larger at the nanostructured AuNP thin film electrode than at a planar gold electrode. Further, the AuNP thin film electrode enabled direct electron transfer (DET) between a redox enzyme, neuroglobin, and the electrode surface, while the planar electrode showed no DET response. The results indicate the usefulness of the present AuNP thin film electrode, prepared by a reagent-free process, for various electrocatalytic applications.http://www.sciencedirect.com/science/article/pii/S138824812200217XNanostructured electrodeGold nanoparticleSurfactant-freeHydrogen evolution reactionDirect electron transferRedox enzyme |
| spellingShingle | Yasuhiro Mie Hirotaka Okabe Chitose Mikami Taisei Motomura Naoki Matsuda Nanostructured gold thin film electrode derived from surfactant-free gold nanoparticles for enhanced electrocatalysis Electrochemistry Communications Nanostructured electrode Gold nanoparticle Surfactant-free Hydrogen evolution reaction Direct electron transfer Redox enzyme |
| title | Nanostructured gold thin film electrode derived from surfactant-free gold nanoparticles for enhanced electrocatalysis |
| title_full | Nanostructured gold thin film electrode derived from surfactant-free gold nanoparticles for enhanced electrocatalysis |
| title_fullStr | Nanostructured gold thin film electrode derived from surfactant-free gold nanoparticles for enhanced electrocatalysis |
| title_full_unstemmed | Nanostructured gold thin film electrode derived from surfactant-free gold nanoparticles for enhanced electrocatalysis |
| title_short | Nanostructured gold thin film electrode derived from surfactant-free gold nanoparticles for enhanced electrocatalysis |
| title_sort | nanostructured gold thin film electrode derived from surfactant free gold nanoparticles for enhanced electrocatalysis |
| topic | Nanostructured electrode Gold nanoparticle Surfactant-free Hydrogen evolution reaction Direct electron transfer Redox enzyme |
| url | http://www.sciencedirect.com/science/article/pii/S138824812200217X |
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