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Nambiar HN, Zamborini FP. Electrophoretic Deposition of Hybrid Calcium Alginate-Gold Nanoparticle Hydrogel Films via Catalyzed Electrooxidation of Hydroquinone. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6495-6504. [PMID: 37093690 DOI: 10.1021/acs.langmuir.3c00429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The electrophoretic deposition (EPD) of hybrid alginate (Alg)-Au nanoparticle (NP) films results from the localized pH drop at the electrode surface due to oxidation of hydroquinone (HQ) catalyzed by 4 and 15 nm diameter citrate-coated gold NPs (cit-Au NPs). The localized pH drop at the electrode leads to neutralization of both Alg and cit, leading to EPD of both Alg and cit-Au NPs simultaneously. Post-treatment of the film with Ca2+ solution leads to hybrid Ca-Alg-Au NP hydrogel films. The EPD of Alg in the presence of 4 nm cit-Au NPs occurs at ∼0.8 V (vs Ag/AgCl) as compared to ∼1.0 V in the presence of 15 nm cit-Au NPs and ∼1.4 V in the absence of cit-Au NPs. This is due to the higher catalytic activity of 4 nm cit-Au NPs compared to 15 nm cit-Au NPs for the oxidation of HQ. UV-vis spectra of Ca-Alg-Au NP hydrogel films show absorbance features for both Ca-Alg and Au NPs entrapped within the hydrogel. As the concentration of Au NPs in the EPD solution increases, the Ca-Alg absorbance and localized surface plasmon resonance (LSPR) peak of the Au NPs increases, confirming the role of the Au NPs as a catalyst for EPD of Alg. Attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectra of the Ca-Alg-Au NP hydrogel films show characteristic peaks for Ca-Alg and protonated alginic acid groups. The hydrogel thickness is greater with cit-Au NPs compared to without cit-Au NPs at constant EPD potential and time. Forming Ca-Alg and hybrid Ca-Alg-Au NP hydrogel films at low potentials has potential applications in electrochemical and optical sensor development, catalysis, and biological studies.
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Affiliation(s)
- Harikrishnan N Nambiar
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Francis P Zamborini
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
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Wu Y, Yang X, Liu S, Xing Y, Peng J, Peng Y, Ni G, Jin X. One-step synthesis of Ni(OH) 2/MWCNT nanocomposites for constructing a nonenzymatic hydroquinone/O 2 fuel cell. RSC Adv 2020; 10:39447-39454. [PMID: 35515406 PMCID: PMC9057427 DOI: 10.1039/d0ra00622j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 10/19/2020] [Indexed: 01/01/2023] Open
Abstract
In this work, a H-type hydroquinone/O2 fuel cell was assembled and shows high energy density in neutral phosphate buffer solution at moderate temperature. The anodic material, Ni(OH)2/MWCNTs, was synthesized by a one-step hydrothermal synthesis method to oxidize hydroquinone. The cathode material, Pt/MWCNTs, was obtained by an electrodeposition method, and shows great oxygen reduction reaction (ORR) activity. The properties and the morphology of Ni(OH)2/MWCNT nanocomposites were characterized by TEM, XPS, EDS-mapping and electrochemical methods, like cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results show that Ni(OH)2/MWCNTs can effectively oxidize hydroquinone and play a dominant role in enhancing the fuel cell performance. The nonenzymatic fuel cell possesses a high power density of 0.24 mW cm-2 at a cell potential of 0.49 V.
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Affiliation(s)
- Yuan Wu
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University Yinchuan 750021 China .,National Demonstration Center for Experimental Chemistry Education, School of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China
| | - Xiaonan Yang
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University Yinchuan 750021 China .,National Demonstration Center for Experimental Chemistry Education, School of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China
| | - Shuhui Liu
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University Yinchuan 750021 China .,National Demonstration Center for Experimental Chemistry Education, School of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China
| | - Yonglei Xing
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University Yinchuan 750021 China .,National Demonstration Center for Experimental Chemistry Education, School of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China
| | - Juan Peng
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University Yinchuan 750021 China .,National Demonstration Center for Experimental Chemistry Education, School of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China
| | - Yage Peng
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University Yinchuan 750021 China .,National Demonstration Center for Experimental Chemistry Education, School of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China
| | - Gang Ni
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University Yinchuan 750021 China .,National Demonstration Center for Experimental Chemistry Education, School of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China
| | - Xiaoyong Jin
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University Yinchuan 750021 China .,National Demonstration Center for Experimental Chemistry Education, School of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China
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Arboleda DM, Ibañez FJ. Improved Electrocatalysis and Electrophoretic Deposition due to the Strong Synergy between Au and Ag Nanoparticles. ChemistrySelect 2020. [DOI: 10.1002/slct.202002616] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- David Muñetón Arboleda
- Instituto de Investigaciones FisicoquímicasTeóricas y Aplicadas (INIFTA). Universidad Nacional de La Plata - CONICET. Sucursal 4 Casilla de Correo 16 (1900) La Plata Argentina
| | - Francisco J. Ibañez
- Instituto de Investigaciones FisicoquímicasTeóricas y Aplicadas (INIFTA). Universidad Nacional de La Plata - CONICET. Sucursal 4 Casilla de Correo 16 (1900) La Plata Argentina
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