Highly sensitive H2O2 sensor based on Co3O4 hollow sphere prepared via a template-free method

Wang, Mei; Jiang, Xiaodan; Liu, Junjuan; Guo, Hailing; Liu, Chenguang

doi:10.1016/j.electacta.2015.08.116

Cited by 80 publications

(34 citation statements)

References 59 publications

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“…This manifest that the original GO has been reduced to rGO during the hydrothermal process, again confirming we have successfully incorporated Co 3 O 4 into rGO38. BET experiments was conducted to obtain specific surface area of as-prepared samples and the isotherms exhibit typical IV isotherms where the recorded BET surface area of Co 3 O 4 /N-rGO, N-rGO and Co 3 O 4 are 103.9 m 2 /g, 139.7 m 2 /g, and 62.8 m 2 /g, respectively.…”

Section: Resultssupporting

confidence: 77%

Co3O4 nanoparticles anchored on nitrogen-doped reduced graphene oxide as a multifunctional catalyst for H2O2 reduction, oxygen reduction and evolution reaction

Zhang

Sun

et al. 2017

Sci Rep

115

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This study describes a facile and effective route to synthesize hybrid material consisting of Co3O4 nanoparticles anchored on nitrogen-doped reduced graphene oxide (Co3O4/N-rGO) as a high-performance tri-functional catalyst for oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and H2O2 sensing. Electrocatalytic activity of Co3O4/N-rGO to hydrogen peroxide reduction was tested by cyclic voltammetry (CV), linear sweep voltammetry (LSV) and chronoamperometry. Under a reduction potential at −0.6 V to H2O2, this constructing H2O2 sensor exhibits a linear response ranging from 0.2 to 17.5 mM with a detection limit to be 0.1 mM. Although Co3O4/rGO or nitrogen-doped reduced graphene oxide (N-rGO) alone has little catalytic activity, the Co3O4/N-rGO exhibits high ORR activity. The Co3O4/N-rGO hybrid demonstrates satisfied catalytic activity with ORR peak potential to be −0.26 V (vs. Ag/AgCl) and the number of electron transfer number is 3.4, but superior stability to Pt/C in alkaline solutions. The same hybrid is also highly active for OER with the onset potential, current density and Tafel slope to be better than Pt/C. The unusual catalytic activity of Co3O4/N-rGO for hydrogen peroxide reduction, ORR and OER may be ascribed to synergetic chemical coupling effects between Co3O4, nitrogen and graphene.

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Section: Resultssupporting

confidence: 77%

Co3O4 nanoparticles anchored on nitrogen-doped reduced graphene oxide as a multifunctional catalyst for H2O2 reduction, oxygen reduction and evolution reaction

Zhang

Sun

et al. 2017

Sci Rep

115

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“…This result is in accordance with the BET analysis (Figure ). At some locations, Co 3 O 4 hollow sphere, as obtained by Guo and co‐workers, has also been observed (Figure (e, f) and Figure S9 and S11, SI) . This result suggest that Co(0) is easily leached out while oxidized surface having Co 3 O 4 remain in the carbon due to poor solubility in dilute acids …”

Section: Figuresupporting

confidence: 66%

Study of the Capacitive Behavior of MOF‐Derived Nanocarbon Polyhedra

et al. 2018

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Co containing zeolitic imidazolate framework (ZIF‐67) with polyhedral morphology was synthesized in aqueous media and utilized as precurser for synthesis of nanoporous carbon polyhedra without using any other carbon source. The phase, composition and morphology of the annealed products could be tailored by changing the annealing temperature as well as acid treatment. Our study herein provides a new insight into the formation of porous carbon polyhedra from ZIF‐67.

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“…2a and Fig. As a paper said 36 , the collapse of ZIF-67 structure will not occur until the temperature is higher than 500 ℃ , when the C-N stretching vibration vanishes. The ZIF-67 membrane is well intergrown and no obvious defects can be observed.…”

Section: Resultsmentioning

confidence: 95%

“…As shown in Fig. Indeed, during the pyrolysis process of the ZIF-67 crystals, H 2 O, CO 2 and N x O y gas are released and the metal species migrate 36 . S3b, the morphology of the Ni foam/Co 3 O 4 is greatly changed in contrast to Ni foam/ZIF-67, wherein Co 3 O 4 crystals are dispersed on Ni foam homogeneously.…”

Section: Resultsmentioning

confidence: 99%

Co₃O₄ nanocrystals derived from a zeolitic imidazolate framework on Ni foam as high-performance supercapacitor electrode material

Yang

Wei

et al. 2016

RSC Adv.

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A binder-free method was adopted to obtain Ni foam/Co3O4 electrode. The Co3O4 nanocrystals with an average size of 15-25 nm deliver high specific capacitance of 1680 F g -1 at a current density of 0.5 A g -1 in 1.0 M KOH electrolyte. Of particular note, the electrode exhibits a high capacitance retention rate of 58.3% at a current density of 15 A g -1 with excellent electrochemical stability ( 15.9% specific capacitance loss after cycling 1000 times ) even at high current density (5 A g -1 ), suggesting its promising application as high-performance supercapacitor electrode material.

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Highly sensitive H2O2 sensor based on Co3O4 hollow sphere prepared via a template-free method

Cited by 80 publications

References 59 publications

Co3O4 nanoparticles anchored on nitrogen-doped reduced graphene oxide as a multifunctional catalyst for H2O2 reduction, oxygen reduction and evolution reaction

Co3O4 nanoparticles anchored on nitrogen-doped reduced graphene oxide as a multifunctional catalyst for H2O2 reduction, oxygen reduction and evolution reaction

Study of the Capacitive Behavior of MOF‐Derived Nanocarbon Polyhedra

Co₃O₄ nanocrystals derived from a zeolitic imidazolate framework on Ni foam as high-performance supercapacitor electrode material

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Highly sensitive H2O2 sensor based on Co3O4 hollow sphere prepared via a template-free method

Cited by 80 publications

References 59 publications

Co3O4 nanoparticles anchored on nitrogen-doped reduced graphene oxide as a multifunctional catalyst for H2O2 reduction, oxygen reduction and evolution reaction

Co3O4 nanoparticles anchored on nitrogen-doped reduced graphene oxide as a multifunctional catalyst for H2O2 reduction, oxygen reduction and evolution reaction

Study of the Capacitive Behavior of MOF‐Derived Nanocarbon Polyhedra

Co3O4 nanocrystals derived from a zeolitic imidazolate framework on Ni foam as high-performance supercapacitor electrode material

Contact Info

Product

Resources

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Co₃O₄ nanocrystals derived from a zeolitic imidazolate framework on Ni foam as high-performance supercapacitor electrode material