A novel MnO2/rGO composite prepared by electrodeposition as a non-noble metal electrocatalyst for ORR

Huang, Baohua; Zhang, Xiaofeng; Cai, Jiannan; Liu, Weikai; Lin, Shen

doi:10.1007/s10800-019-01325-y

Cited by 24 publications

(15 citation statements)

References 32 publications

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“…A plain CB/CC electrode then makes a battery with satisfactory performance, but it enjoys an even better performance when manganese oxide is mixed with carbon black. This result justifies the employment of MnO2 as oxygen reduction electrocatalyst both in the present case as well as in other fuel cell applications, as already discussed [13][14][15][16][17][18][19]. The appearance of the polarization curve, more specifically, the fact that current density continuously increased with voltage decrease and did not demonstrate an extremum is a rough index of the state of the electrolyte in the device.…”

Section: Electric Characteristics Of the Thin Film Al-air Batterysupporting

confidence: 82%

“…With this in mind, in the present work we studied the addition of MnO 2 as non-noble-metal electrocatalyst to operate the thin film Al-air battery. MnO 2 has been previously successfully employed as oxygen reduction electrocatalyst in several types of fuel cell devices including Al-air battery [13], Na-air battery [14], microbial fuel cells [15][16][17][18], and other types of fuel cells [19]. The present work will then also deal with the study of MnO 2 -loaded cathode electrodes which will be applied to thin film Al-air batteries.…”

Section: Introductionmentioning

confidence: 98%

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Study of a Thin Film Aluminum-Air Battery

et al. 2020

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A thin film aluminum-air battery has been constructed using a commercial grade Al-6061 plate as anode electrode, an air-breathing carbon cloth carrying an electrocatalyst as cathode electrode, and a thin porous paper soaked with aqueous KOH as electrolyte. This type of battery demonstrates a promising behavior under ambient conditions of 20 °C temperature and around 40% humidity. It presents good electric characteristics when plain nanoparticulate carbon (carbon black) is used as electrocatalyst but it is highly improved when MnO2 particles are mixed with carbon black. Thus, the open-circuit voltage was 1.35 V, the short-circuit current density 50 mA cm−2, and the maximum power density 20 mW cm−2 in the absence of MnO2 and increased to 1.45 V, 60 mA cm−2, and 28 mW cm−2, respectively, in the presence of MnO2. The corresponding maximum energy yield during battery discharge was 4.9 mWh cm−2 in the absence of MnO2 and increased to 5.5 mWh cm−2 in the presence of MnO2. In the second case, battery discharge lasted longer under the same discharge conditions. The superiority of the MnO2-containing electrocatalyst is justified by electrode electrochemical characterization data demonstrating reduction reactions at higher potential and charge transfer with much smaller resistance.

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Section: Electric Characteristics Of the Thin Film Al-air Batterysupporting

confidence: 82%

Section: Introductionmentioning

confidence: 98%

Study of a Thin Film Aluminum-Air Battery

et al. 2020

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“…Moreover, the diffraction rings observed correspond to the (002), (110), (301), and (521) facets on the XRD of MnO 2 @RGO nanocomposite, showing the character of both MnO 2 nanoparticles and RGO nanosheets. This further confirms the successful integration of MnO 2 nanoparticles on the surface of RGO nanosheets [ 42 ].…”

Section: Resultssupporting

confidence: 73%

“…The FTIR spectra of the MnO 2 nanoparticles display a broad band around 3404 cm −1 corresponding to the -OH vibration mode of absorbed water [ 43 ]. The vibration bands at 1629 and 1398 cm −1 can be ascribed to the -OH stretching of the adsorbed water and the metallic hydroxide (Mn-OH) formed during the electrodeposition process, respectively [ 42 , 43 , 44 ]. The broad band around 647 cm −1 was attributed to the stretching Mn-O bond in MnO 2 nanoparticles [ 39 , 43 , 44 ].…”

Section: Resultsmentioning

confidence: 99%

MnO2@Reduced Graphene Oxide Nanocomposite-Based Electrochemical Sensor for the Simultaneous Determination of Trace Cd(II), Zn(II) and Cu(II) in Water Samples

2021

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The rapid detection of trace metals is one of the most important aspect in achieving environmental monitoring and protection. Electrochemical sensors remain a key solution for rapid detection of heavy metals in environmental water matrices. This paper reports the fabrication of an electrochemical sensor obtained by the simultaneous electrodeposition of MnO2 nanoparticles and RGO nanosheets on the surface of a glassy carbon electrode. The successful electrodeposition was confirmed by the enhanced current response on the cyclic voltammograms. The XRD, HR-SEM/EDX, TEM, FTIR, and BET characterization confirmed the successful synthesis of MnO2 nanoparticles, RGO nanosheets, and MnO2@RGO nanocomposite. The electrochemical studies results revealed that MnO2@RGO@GCE nanocomposite considerably improved the current response on the detection of Zn(II), Cd(II) and Cu(II) ions in surface water. These remarkable improvements were due to the interaction between MnO2 nanomaterials and RGO nanosheets. Moreover, the modified sensor electrode portrayed high sensitivity, reproducibility, and stability on the simultaneous determination of Zn(II), Cd(II), and Cu(II) ions. The detection limits of (S/N = 3) ranged from 0.002–0.015 μg L−1 for the simultaneous detection of Zn(II), Cd(II), and Cu(II) ions. The results show that MnO2@RGO nanocomposite can be successfully used for the early detection of heavy metals with higher sensitivity in water sample analysis.

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“…Similarly, a cheap and efficient non-noble metal electrocatalyst MnO 2 /rGO composite with a novel yarn-rod shape was developed by a simple, economic, and environmentally friendly electrodeposition method. [68] Electrochemical studies showed that the ORR's MnO 2 /rGO composite electrocatalysts in an alkaline medium proceed predominantly by the four-electrontransfer pathway. The experimental results indicated that the www.afm-journal.de www.advancedsciencenews.com…”

Section: Oxygen Reduction Reactionmentioning

confidence: 99%

Electrocatalysts by Electrodeposition: Recent Advances, Synthesis Methods, and Applications in Energy Conversion

Kale

Borse

Mohamed

et al. 2021

Adv Funct Materials

109

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The conventional environment polluting energy sources and the continuous growing energy demand compelled researchers to find alternative energy sources. Therefore, in recent years, extensive research has been carried out in synthesizing catalysts for energy conversion applications. This review focuses on the application of various electrodeposition methods in the synthesis of energy-related electrocatalyst and briefly discusses different electrocatalyst characterization techniques. Further, the influence of various parameters on the electrocatalyst activity and stability is highlighted. Electrocatalyst application in clean energy conversion reactions, such as the hydrogen evolution reaction, oxygen evolution reaction, oxygen reduction reaction, carbon dioxide reduction reaction, nitrogen reduction reaction along with the metalair/CO 2 battery, are reviewed. Finally, the comparative experimental data are provided as a reference to synthesize the next-generation electrodeposited electrocatalyst in clean energy conversions and beyond.

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A novel MnO2/rGO composite prepared by electrodeposition as a non-noble metal electrocatalyst for ORR

Cited by 24 publications

References 32 publications

Study of a Thin Film Aluminum-Air Battery

Study of a Thin Film Aluminum-Air Battery

MnO2@Reduced Graphene Oxide Nanocomposite-Based Electrochemical Sensor for the Simultaneous Determination of Trace Cd(II), Zn(II) and Cu(II) in Water Samples

Electrocatalysts by Electrodeposition: Recent Advances, Synthesis Methods, and Applications in Energy Conversion

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