Electrochemically formed 3D hierarchical thin films of cobalt–manganese (Co–Mn) hexacyanoferrate hybrids for electrochemical applications

Venugopal, Narendra Kumar Alam; Joseph, James

doi:10.1016/j.jpowsour.2015.11.088

Cited by 57 publications

(21 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the K‐Co‐Mn‐F (Co/Mn=0:1) candidate, similarly, the two pairs of redox peaks centering at 0.4/0.31 and 0.52/0.47 V can be attributed to the transitions of Mn 3+ /Mn 2+ and Mn 4+ /Mn 3+ redox couples . For the K‐Co‐Mn‐F (Co/Mn=12:1, 6:1 3:1, 1:1, 1:3) candidates, the two pairs of redox peaks become stronger than the K‐Co‐Mn‐F (Co/Mn=0:1) candidate and the peak positions present small shifts due to the overlaps of Co 3+ /Co 2+ , Co 4+ /Co 3+ , Mn 3+ /Mn 2+ , and Mn 4+ /Mn 3+ redox couples, and the charge storage mechanisms are believed to contain the transitions of these multi‐redox pairs, as can be shown in Equations . It is noted that the K‐Co‐Mn‐F (Co/Mn=6:1) candidate exhibits stronger redox peaks and larger CV areas compared with the other K‐Co‐Mn‐F candidates (also see Figure S3), revealing the optimal synergistic effect of Co and Mn redox species for the perovskite K‐Co‐Mn‐F (Co/Mn=6:1) candidate.…”

Section: Figuresupporting

confidence: 53%

“…Figure a shows the CV plots measured at 80 mV s −1 . For the K‐Co‐Mn‐F (Co/Mn=1:0) candidate, the detected two pairs of redox peaks (A1/C1, A2/C2) at about 0.41/0.28 and 0.58/0.48 V can be assigned to the transitions of Co 3+ /Co 2+ and Co 4+ /Co 3+ redox couples . For the K‐Co‐Mn‐F (Co/Mn=0:1) candidate, similarly, the two pairs of redox peaks centering at 0.4/0.31 and 0.52/0.47 V can be attributed to the transitions of Mn 3+ /Mn 2+ and Mn 4+ /Mn 3+ redox couples .…”

Section: Figurementioning

confidence: 80%

“…For the K‐Co‐Mn‐F (Co/Mn=1:0) candidate, the detected two pairs of redox peaks (A1/C1, A2/C2) at about 0.41/0.28 and 0.58/0.48 V can be assigned to the transitions of Co 3+ /Co 2+ and Co 4+ /Co 3+ redox couples . For the K‐Co‐Mn‐F (Co/Mn=0:1) candidate, similarly, the two pairs of redox peaks centering at 0.4/0.31 and 0.52/0.47 V can be attributed to the transitions of Mn 3+ /Mn 2+ and Mn 4+ /Mn 3+ redox couples . For the K‐Co‐Mn‐F (Co/Mn=12:1, 6:1 3:1, 1:1, 1:3) candidates, the two pairs of redox peaks become stronger than the K‐Co‐Mn‐F (Co/Mn=0:1) candidate and the peak positions present small shifts due to the overlaps of Co 3+ /Co 2+ , Co 4+ /Co 3+ , Mn 3+ /Mn 2+ , and Mn 4+ /Mn 3+ redox couples, and the charge storage mechanisms are believed to contain the transitions of these multi‐redox pairs, as can be shown in Equations .…”

Section: Figurementioning

confidence: 93%

See 2 more Smart Citations

Bimetallic Co‐Mn Perovskite Fluorides as Highly‐Stable Electrode Materials for Supercapacitors

Shi

Ding

et al. 2017

Chemistry A European J

View full text Add to dashboard Cite

Bimetallic Co-Mn perovskite fluorides (KCo Mn F , denoted as K-Co-Mn-F) with various Co/Mn ratios (1:0, 12:1, 6:1, 3:1, 1:1, 1:3, 0:1) were prepared through a one-pot solvothermal strategy and further used as electrode materials for supercapacitors. The optimal K-Co-Mn-F candidate (Co/Mn=6:1) showed a size range of 0.1-1 μm and uniform elemental distribution; exhibiting small changes in XRD peaks and XPS binding energy in comparison to the bare K-Co-F and K-Mn-F, due to the structural/electronic effects. Owing to the stronger synergistic effect of Co/Mn redox species, the K-Co-Mn-F (Co/Mn=6:1) electrode exhibited superior specific capacity and rate behavior (113-100 C g at 1-16 Ag ) together with excellent cycling stability (118 % for 5000 cycles at 8 Ag ), and the activated carbon (AC)//K-Co-Mn-F (Co/Mn=6:1) asymmetric capacitor showed superior energy and power densities (8.0-2.4 Wh kg at 0.14-8.7 kW kg ) along with high cycling stability (90 % for 10 000 cycles at 5 Ag ).

show abstract

Section: Figuresupporting

confidence: 53%

Section: Figurementioning

confidence: 80%

Section: Figurementioning

confidence: 93%

See 1 more Smart Citation

Bimetallic Co‐Mn Perovskite Fluorides as Highly‐Stable Electrode Materials for Supercapacitors

Shi

Ding

et al. 2017

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…The cycling performance is performed by 5000 cycles of charge‐discharge at a current density of 5 mA cm −2 . It could be observed that the specific capacitance increases firstly, which is ascribed to a progressive activation of electrode in alkaline electrolyte: the electrolyte gradually infiltrates from outer porous shell into the void space, resulting more and more materials activated to provide higher capacitance ,. After that, the specific capacitance of the electrode decreases, which could be considered the active material falling off.…”

Section: Resultsmentioning

confidence: 99%

Self‐Templated Synthesis of Cuprous Oxide Nanofiber‐Assembled Hollow Spheres for High‐Performance Electrochemical Energy Storage

Wang

Miao

et al. 2018

ChemElectroChem

View full text Add to dashboard Cite

Hollow structures are considered as promising electrode materials. Their enhanced surface‐to‐volume ratio results in an increased contact area between the electrolyte and electrode and, thereby, a higher accessibility of active material. Here, a facile hydrothermal method is applied to synthesize hollow Cu2O spheres, assembled by well‐aligned nanofibers. Based on the investigation of the samples at different reaction times, a growing mechanism is proposed. Nano building‐blocks create porous channels within the shell, which could facilitate the transfer and shorten the transportation pathway for both ions and charge. The Cu2O with its unique structure displays a high specific capacitance of 1075 F g−1 at a current density of 5 mA cm−2, a remarkable rate capability of 82 %, and an excellent cycling property of nearly 100 % of the initial value remaining after 5000 charge‐discharge cycles. Moreover, the hollow Cu2O spheres are first used for the preparation of a positive electrode in an asymmetric supercapacitor, using carbon as a negative electrode. The device exhibits a high energy density of 44.7 Wh kg−1 at a power density of 420.2 W kg−1, and when the power density reaches values as high as 4201.7 W kg−1, an energy density of 16 Wh kg−1 is still attained.

show abstract

“…These redox couples have been widely assigned to the intercalation of alkaline ions (Na + in this case) from solution upon the uptake of one electron. [22,[39][40][41][42] Chemical equations for these redox processes may be written. The Co 3þ jCo 2þ and Mn 3þ jMn 2þ redox couples appear at a very similar potential and therefore cannot be differentiated; [22,[39][40][41][42] thus, these constitute the signal 1 in Figure 3-a.…”

Section: Electrochemistry Of the Comnhcf Solid And H 2 O 2 Electrooximentioning

confidence: 99%

Bimetallic Co²⁺ and Mn²⁺ Hexacyanoferrate for Hydrogen Peroxide Electrooxidation and Its Application in a Highly Sensitive Cholesterol Biosensor

et al. 2019

View full text Add to dashboard Cite

In this work, we report the synthesis and characterization of a bimetallic Prussian blue analogue containing Co and Mn as outer-sphere metals (CoMnHCF). The material was a solid solution and its characterization revealed a chemical composition of Co 2.05 Mn 0.95 [Fe(CN) 6 ] 2 · 12H 2 O. The electrochemistry of this novel material showed the existence of two redox waves displaying quasi-reversible kinetics, as expressed by the larger peak-to-peak separation upon increasing the potential sweep rate. Interestingly, the CoMnHCF solid exhibited high electrocatalytic activity for the oxidation of hydrogen peroxide, thus representing an appealing scaffold for the construction of biosensors. As a proof of concept, cholesterol oxidase was immobilized at the electrode surface by using a sol-gel method, and the cyclic voltammograms were recorded at increasing concentrations of cholesterol. The biosensor showed a detection limit of 30 μM and two linear ranges with excellent sensitivity of 385 mA cm À 2 M À 1 between 50 and 150 μM, and an adequate sensitivity of 80 mA cm À 2 M À 1 between 150 and 1 mM. To the best of our knowledge, this is the first biosensor application of a pre-synthesized bimetallic hexacyanometallate, thus exploiting its potential as an H 2 O 2 electrooxidation catalyst.

show abstract

Electrochemically formed 3D hierarchical thin films of cobalt–manganese (Co–Mn) hexacyanoferrate hybrids for electrochemical applications

Cited by 57 publications

References 54 publications

Bimetallic Co‐Mn Perovskite Fluorides as Highly‐Stable Electrode Materials for Supercapacitors

Bimetallic Co‐Mn Perovskite Fluorides as Highly‐Stable Electrode Materials for Supercapacitors

Self‐Templated Synthesis of Cuprous Oxide Nanofiber‐Assembled Hollow Spheres for High‐Performance Electrochemical Energy Storage

Bimetallic Co²⁺ and Mn²⁺ Hexacyanoferrate for Hydrogen Peroxide Electrooxidation and Its Application in a Highly Sensitive Cholesterol Biosensor

Contact Info

Product

Resources

About

Electrochemically formed 3D hierarchical thin films of cobalt–manganese (Co–Mn) hexacyanoferrate hybrids for electrochemical applications

Cited by 57 publications

References 54 publications

Bimetallic Co‐Mn Perovskite Fluorides as Highly‐Stable Electrode Materials for Supercapacitors

Bimetallic Co‐Mn Perovskite Fluorides as Highly‐Stable Electrode Materials for Supercapacitors

Self‐Templated Synthesis of Cuprous Oxide Nanofiber‐Assembled Hollow Spheres for High‐Performance Electrochemical Energy Storage

Bimetallic Co2+ and Mn2+ Hexacyanoferrate for Hydrogen Peroxide Electrooxidation and Its Application in a Highly Sensitive Cholesterol Biosensor

Contact Info

Product

Resources

About

Bimetallic Co²⁺ and Mn²⁺ Hexacyanoferrate for Hydrogen Peroxide Electrooxidation and Its Application in a Highly Sensitive Cholesterol Biosensor