Three-dimensionally ordered macroporous Cu2O/Ni inverse opal electrodes for electrochemical supercapacitors

Deng, Ming-Jay; Song, Cheng-Zhao; Ho, Pei-Jung; Wang, Cheng-Chia; Chen, Jin‐Ming; Lu, Kueih‐Tzu

doi:10.1039/c3cp51472b

Cited by 37 publications

(10 citation statements)

References 26 publications

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“…CuCo 2 O 4 NWs prepared by direct annealing in air were also measured for comparison (Figure b and Figure S3, Supporting Information). Cu 2p 3/2 can be deconvoluted into Cu + (932.5 eV) and Cu 2+ (935.5 eV) for both CuCoO‐NWs and CuCo 2 O 4 ‐NWs (Figure a,b) . The Cu 2p 3/2 spectrum also exhibits weak satellite peaks (marked as Sat.…”

Section: Resultsmentioning

confidence: 97%

CuCo Hybrid Oxides as Bifunctional Electrocatalyst for Efficient Water Splitting

Kuang

Han

Wang

et al. 2016

Adv Funct Materials

266

163

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Solar-driven water splitting is a promising approach for renewable energy, where the development of efficient and stable bifunctional electrocatalysts for simultaneously producing hydrogen and oxygen is still challenging. Herein, combined with the hydrogen evolution reaction (HER) activity of a copper(I) complex and oxygen evolution reaction (OER) activity of cobalt-based oxides, a type of 1D copper-cobalt hybrid oxide nanowires (CuCoO-NWs) is developed via a facile two-step growth-conversion process toward a bifunctional water splitting catalyst. The CuCoO-NWs exhibit excellent catalytic performances for both HER and OER in the same basic electrolyte, with optimized low onset overpotentials and high current densities. The efficient HER activity is ascribed to the formation of Cu 2 O, while the activity for OER is primarily enabled by Co-based oxides and abundant oxygen vacancies. The CuCoO-NWs allow for the assembly of a water electrolyzer with strong alkaline media, with a current density of 10 mA cm −2 at 1.61 V. Further combination with a commercial silicon photovoltaic allows the direct use of solar energy for spontaneous water splitting with excellent stability for over 72 h, suggesting the potential as a promising bifunctional electrocatalyst for efficient solar-driven water splitting.

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Section: Resultsmentioning

confidence: 97%

CuCo Hybrid Oxides as Bifunctional Electrocatalyst for Efficient Water Splitting

Kuang

Han

Wang

et al. 2016

Adv Funct Materials

266

163

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“…The pseudeocapacitance of the Cu oxide electrode is the result of transitions between oxidation states Cu(I) oxide-Cu(II) oxide and vice versa. The redox reaction for the Cu oxide electrode is presented as follows: 42 …”

Section: Resultsmentioning

confidence: 99%

Copper Salts Mediated Morphological Transformation of Cu2O from Cubes to Hierarchical Flower-like or Microspheres and Their Supercapacitors Performances

Chen

Zhang

Zhu

et al. 2015

Sci Rep

101

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Monodisperse Cu2O of different microstructures, such as cubes, flower-like, and microspheres, have been extensively synthesized by a simple polyol reduction method using different copper salts, i.e. (Cu(acac)2, Cu(OH)2, and Cu(Ac)2·H2O). The effects of copper salts on the morphology of Cu2O were investigated in details through various characterization methods, including X-ray diffraction, transmission electron microscopy, scanning electron microscopy and UV-Vis absorption spectra. The effects of morphology on the electrochemical properties were further studied. Among the different structures, Cu2O with the microspheric morphology shows the highest specific capacitance and the best cycling stability compared with those of the other two structures, thus bear larger volume charge during the electrochemical reaction due to the microspheres of small nanoparticles.

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“…Fortunately, Cu 2 O is also a typical semiconductor and exhibits good electrochemical performance in Li-ion batteries [31][32] and supercapacitors [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of Cu2O/CuO/RGO nanocomposite and its superior cyclability in supercapacitor

Wang

Dong

Zhao

et al. 2015

Electrochimica Acta

237

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Three-dimensionally ordered macroporous Cu2O/Ni inverse opal electrodes for electrochemical supercapacitors

Cited by 37 publications

References 26 publications

CuCo Hybrid Oxides as Bifunctional Electrocatalyst for Efficient Water Splitting

CuCo Hybrid Oxides as Bifunctional Electrocatalyst for Efficient Water Splitting

Copper Salts Mediated Morphological Transformation of Cu2O from Cubes to Hierarchical Flower-like or Microspheres and Their Supercapacitors Performances

Facile synthesis of Cu2O/CuO/RGO nanocomposite and its superior cyclability in supercapacitor

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