Enhanced supercapacitive performance of binary cooperative complementary Co(OH)2/Mn3O4 nanomaterials directly synthesized through ion diffusion method controlled by ion exchange membrane

Liu, Hua; Xue, Qin; Zhao, Jiangshan; Zhang, Qiang

doi:10.1016/j.electacta.2017.12.067

Cited by 18 publications

(9 citation statements)

References 52 publications

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“…Except for the contaminant carbon, no significant impurities are founded. As shown in Figure 5b, the Mn 2p 3/2 spectrum shows two distinct peaks at 641.59 and 643.42 eV, which are consistent with the binding energy of Mn(II) to Mn(III) in Mn 2+ (Mn 3+ ) 2 O 4 [27]. The O 1s peak of Mn 3 O 4 splits into two peaks with the binding energy 530.09 and 531.47 eV in Figure 5c, which are in agreement with the analysis of O 1s in Mn 3 O 4 [38].…”

Section: Resultssupporting

confidence: 62%

“…The specific capacitance of M1.5 is higher than that of Mn 3 O 4 nanomaterials reported in the literature [25,26]. It is suggested that the highest specific capacitance of M1.5 is due to the fact that M1.5 has more abundant mesopores, which will promote the diffusion of electrolyte ions into the interior of electrode active materials [27,44].…”

Section: Resultsmentioning

confidence: 99%

“…Liu et al have synthesized Mn 3 O 4 solid nanospheres with a specific capacitance of 150 F g −1 at a current density of 0.3 A g −1 in 1 M Na 2 SO 4 [26]. In our previous work [27], we doped Co ions in the Mn 3 O 4 to prepare the Co(OH) 2 /Mn 3 O 4 nanocomposites via a facile ion diffusion method, which effectively improved the aggregation behavior of Mn 3 O 4 nanoparticles and increased the conductivity and specific capacitance.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Agar Hydrogel Template Synthesis of Mn3O4 Nanoparticles through an Ion Diffusion Method Controlled by Ion Exchange Membrane and Electrochemical Performance

Xue

Zhang

2019

Nanomaterials

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A novel strategy, ion diffusion method controlled by ion exchange membrane combining with agar hydrogel template, was reported for the synthesis of Mn3O4 nanoparticles without any oxidizing agents. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Brunauere-Emmette-Teller (BET) isotherm were carried out to characterize the structure, morphology, pore size and distribution and specific surface area of the as-prepared nanomaterials. It is shown that the morphology and size of Mn3O4 nanoparticles can be controlled by the concentration of agar hydrogel. All the specific capacitances of the Mn3O4 samples prepared with agar hydrogel template are much higher than that of Mn3O4 prepared without any template agent. The Mn3O4 sample prepared at 1.5 g L−1 of agar hydrogel solution exhibits a highest specific capacitance of 183.0 F g−1 at the current density of 0.5 A g−1, which is increased by 293% compared with that of Mn3O4 synthesized without any template agent. The results indicate that the ion diffusion method controlled by ion exchange membrane combining with agar hydrogel template is a convenient and effective approach for preparing inorganic nanomaterials.

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Section: Resultssupporting

confidence: 62%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Agar Hydrogel Template Synthesis of Mn3O4 Nanoparticles through an Ion Diffusion Method Controlled by Ion Exchange Membrane and Electrochemical Performance

Xue

Zhang

2019

Nanomaterials

Self Cite

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“…After the homogeneous dispersion of Co 2+ cations, stoichiometric NaOH as the oxygen donor was added into the mixture. Because of the strong Coulomb interaction between Co 2+ and OH À (K sp -a-Co(OH) 2 = 1.09 310 À15 ), 47 the selective transformation of Co 2+ to the corresponding hydroxide occurred, which was evidenced by the presence of characteristic peaks for Co(OH) 2 ( From Figure 2A; Table 1, we can see that the type of dilute salts has an important influence on the SSA value. The NaCl-derived Co 3 O 4 (NaCl) sample had a good SSA of 110 m 2 /g, meanwhile its sorption curve exhibited a typical type IV isotherm with a H 3 -type hysteresis loop between relative pressure P/P 0 = $0.5-1.0, implying In fact, the dosage of NaCl (0.5 g) is low compared with the molten salt method, during which salt additives with 10-20 dosages by weight were generally needed.…”

Section: Synthesis and Characterization Of Mesoporous Metal Oxidesmentioning

confidence: 99%

A Principle for Highly Active Metal Oxide Catalysts via NaCl-Based Solid Solution

Yuan

Chen

et al. 2020

Chem

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For industrial catalysis, a simple and green process for catalyst synthesis has always been pursued. In this regard, we utilized NaCl, one of the most common salts, as a template to prepare transitional metal oxide catalysts with both abundant porosity and well-dispersed noble metal species. Interestingly, this dispersion by NaCl was realized by solid-state grinding. Importantly, those catalysts afforded excellent performance in redox processes.

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“…Zhen et al [24] reported that a Ta 3 N 5 nanorod modified with Co(OH) x had a strong absorption in the visible light range up to 620 nm and could achieve high photon-to-current conversion efficiency. The use of catalyst promoters like Co(OH) x [25,26] and CoPi [27,28] has become an important and promising way to improve the photocatalytic capability of photocatalysts [29,30,31,32,33]. Such promoters function by restraining the recombination rate of interfacial photogenerated electron-hole pairs and play a useful role in providing ready sites for the oxidation half reaction [34].…”

Section: Introductionmentioning

confidence: 99%

CoPi/Co(OH)2 Modified Ta3N5 as New Photocatalyst for Photoelectrochemical Cathodic Protection of 304 Stainless Steel

et al. 2019

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In this work, CoPi and Co(OH)2 nanoparticles were deposited on the surface of Ta3N5 nanorod-arrays to yield a novel broad-spectrum response photocatalytic material for 304 stainless steel photocatalytic cathodic protection. The Ta3N5 nanorod-arrays were prepared by vapor-phase hydrothermal (VPH) and nitriding processes and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-Vis spectroscopy, respectively, to obtain morphologies, crystal structures, surface compositions, and light response range. In order to analyze the performance improvement mechanism of CoPi/Co(OH)2 on Ta3N5 nanorod-arrays, the electrochemical behavior of modified and unmodified Ta3N5 was obtained by measuring the open circuit potential and photocurrent in 3.5 wt% NaCl solution. The results revealed that the modified Ta3N5 material better protects 304 stainless steel at protection potentials reaching −0.45 V.

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Enhanced supercapacitive performance of binary cooperative complementary Co(OH)2/Mn3O4 nanomaterials directly synthesized through ion diffusion method controlled by ion exchange membrane

Cited by 18 publications

References 52 publications

Agar Hydrogel Template Synthesis of Mn3O4 Nanoparticles through an Ion Diffusion Method Controlled by Ion Exchange Membrane and Electrochemical Performance

Agar Hydrogel Template Synthesis of Mn3O4 Nanoparticles through an Ion Diffusion Method Controlled by Ion Exchange Membrane and Electrochemical Performance

A Principle for Highly Active Metal Oxide Catalysts via NaCl-Based Solid Solution

CoPi/Co(OH)2 Modified Ta3N5 as New Photocatalyst for Photoelectrochemical Cathodic Protection of 304 Stainless Steel

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