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Xue H, Shi Y, Tian W, Cao M, Cao H, Na Z, Jiang G, Jin Z, Lang MF, Liu Y, Sun J. Silver Nanowires-Based Flexible Gold Electrode Overcoming Interior Impedance of Nanomaterial Electrodes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2307328. [PMID: 38196157 DOI: 10.1002/smll.202307328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 12/14/2023] [Indexed: 01/11/2024]
Abstract
In the development of nanomaterial electrodes for improved electrocatalytic activity, much attention is paid to the compositions, lattice, and surface morphologies. In this study, a new concept to enhance electrocatalytic activity is proposed by reducing impedance inside nanomaterial electrodes. Gold nanodendrites (AuNDs) are grown along silver nanowires (AgNWs) on flexible polydimethylsiloxane (PDMS) support. The AuNDs/AgNWs/PDMS electrode affords an oxidative peak current density of 50 mA cm-2 for ethanol electrooxidation, a value ≈20 times higher than those in the literature do. Electrochemical impedance spectroscopy (EIS) demonstrates the significant contribution of the AgNWs to reduce impedance. The peak current densities for ethanol electrooxidation are decreased 7.5-fold when the AgNWs are electrolytically corroded. By in situ surface-enhanced Raman spectroscopy (SERS) and density functional theory (DFT) simulation, it is validated that the ethanol electrooxidation favors the production of acetic acid with undetectable CO, resulting in a more complete oxidation and long-term stability, while the AgNWs corrosion greatly decreases acetic acid production. This novel strategy for fabricating nanomaterial electrodes using AgNWs as a charge transfer conduit may stimulate insights into the design of nanomaterial electrodes.
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Affiliation(s)
- Hongsheng Xue
- Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, 116001, China
| | - Yacheng Shi
- Department of Chemistry, Beijing Key Laboratory for Analytical Methods and Instrumentation, Key Lab of Bioorganic Phosphorus Chemistry and Chemical Biology of Ministry of Education, Tsinghua University, Beijing, 100084, China
| | - Wenshuai Tian
- College of Chemical and Environmental Engineering, Dalian Key Laboratory of Oligosaccharide Recombination and Recombinant Protein Modification, Dalian University, Dalian, Liaoning, 116622, China
- College of Marine Engineering, Dalian Maritime University, Dalian, Liaoning, 116026, China
| | - Meng Cao
- School of Science and Engineering, The Chinese University of Hong Kong (Shenzhen), Shenzhen, 518172, China
| | - Houyong Cao
- College of Chemical and Environmental Engineering, Dalian Key Laboratory of Oligosaccharide Recombination and Recombinant Protein Modification, Dalian University, Dalian, Liaoning, 116622, China
| | - Zhaolin Na
- College of Chemical and Environmental Engineering, Dalian Key Laboratory of Oligosaccharide Recombination and Recombinant Protein Modification, Dalian University, Dalian, Liaoning, 116622, China
| | - Ge Jiang
- College of Life and Health, Dalian University, Dalian, Liaoning, 116622, China
| | - Zhengmu Jin
- Dalian Ofei Electronics CO.,LTD., Dalian, Liaoning, 116021, China
| | - Ming-Fei Lang
- Medical College, Dalian Key Laboratory of Oligosaccharide Recombination and Recombinant Protein Modification, Dalian University, Dalian, Liaoning, 116622, China
| | - Yang Liu
- Department of Chemistry, Beijing Key Laboratory for Analytical Methods and Instrumentation, Key Lab of Bioorganic Phosphorus Chemistry and Chemical Biology of Ministry of Education, Tsinghua University, Beijing, 100084, China
| | - Jing Sun
- College of Chemical and Environmental Engineering, Dalian Key Laboratory of Oligosaccharide Recombination and Recombinant Protein Modification, Dalian University, Dalian, Liaoning, 116622, China
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Shao L, Moehl GE, Huang R, Hector AL. Fractal-like gold nanonetworks formed by templated electrodeposition through 3D-mesoporous silica films. RSC Adv 2023; 13:32660-32671. [PMID: 37936637 PMCID: PMC10626528 DOI: 10.1039/d3ra06588j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 10/30/2023] [Indexed: 11/09/2023] Open
Abstract
Fractal-like networks of gold nanoparticles created by templated electrodeposition are described. Templated electrodeposition is a powerful and efficient technique for the bottom-up fabrication of nanostructures which can effectively control the size and shape of the electrodeposits. In this work, mesoporous silica films with highly ordered mesopores and three-dimensional mesostructure are synthesised and are used as templates for the electrodeposition of gold nanoparticles. The mesoporous silica films have small mesopores (∼8 nm) and complex mesopore channels (Fmmm structure with the [0 1 0] axis perpendicular to the substrate). A variety of nucleation conditions were applied to investigate their effect on the nanoparticles' arrangement and growth in templated electrodeposition. The electrodeposited gold particles are characterised by electron microscopy and grazing incidence small-angle X-ray scattering (GISAXS). GISAXS shows changes in the lattice parameters of the mesostructure after gold electrodeposition that relate to dimensional changes in directions linked to the shortest distances between the main spherical pores. Top-view SEM shows large areas of gold nanoparticles were deposited into the film and they were growing towards the surface. After removing the silica film templates, the gold nanoparticles display interesting fractal morphologies: the linked gold nanonetworks form a branched structure. The lengths of branches vary from the applied nucleation deposition conditions. Generally, with increasing nucleation time, fractal gold nanoparticles with longer branches are more likely to be obtained.
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Affiliation(s)
- Li Shao
- School of Chemistry, University of Southampton, Highfield Southampton SO17 1BJ UK
| | - Gilles E Moehl
- School of Chemistry, University of Southampton, Highfield Southampton SO17 1BJ UK
| | - Ruomeng Huang
- School of Electronics and Computer Science, University of Southampton Southampton SO17 1BJ UK
| | - Andrew L Hector
- School of Chemistry, University of Southampton, Highfield Southampton SO17 1BJ UK
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Zheng Y, Zhang G, Ma Y, Kong Y, Liu F, Liu M. Kinetics-Controlled Synthesis of Gold-Silver Nanosheets with Abundant in-Plane Cracking and Their Trimetallic Derivatives for Plasmon-Enhanced Catalysis. CrystEngComm 2022. [DOI: 10.1039/d1ce01505b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Controlled synthesis of two-dimensional noble metal nanomaterials with in-plane branching morphology has been of great research interest recently, which yet achieves limited success for AuAg-based nanocrystals. Herein, we report the...
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Li S, Wang Z, Shao Y, Zhang K, Mei L, Wang J. In situ detection of fluid media based on a three-dimensional dendritic silver surface-enhanced Raman scattering substrate. NEW J CHEM 2022. [DOI: 10.1039/d1nj05451a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A simple substitution reaction was used to grow 3D dendritic silver structures in microfluidic channels, and a highly active SERS detection platform was formed. The system can realize in situ detection of 10−10 mol L−1 R6G solution.
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Affiliation(s)
- Sha Li
- School of Mechanical Engineering, North University of China, Taiyuan, Shanxi 030051, China
| | - Zezhou Wang
- School of Mechanical Engineering, North University of China, Taiyuan, Shanxi 030051, China
| | - Yunpeng Shao
- School of Mechanical Engineering, North University of China, Taiyuan, Shanxi 030051, China
| | - Kai Zhang
- School of Mechanical Engineering, North University of China, Taiyuan, Shanxi 030051, China
| | - Linyu Mei
- School of Mechanical Engineering, North University of China, Taiyuan, Shanxi 030051, China
| | - Junyuan Wang
- School of Mechanical Engineering, North University of China, Taiyuan, Shanxi 030051, China
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