Regulating the active species of Ni(OH)2 using CeO2: 3D CeO2/Ni(OH)2/carbon foam as an efficient electrode for the oxygen evolution reaction

Liu, Zhengqing; Li, Na; Zhao, Hongyang; Zhang, Yi; Huang, Yunhui; Yin, Zongyou; Du, Yaping

doi:10.1039/c6sc05408k

Cited by 156 publications

(101 citation statements)

References 42 publications

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“…It has been reported by other researchers that the oxygen adsorption capacity of catalysts can be improved by the addition of Ce, and the subsequente lectronic structure modulation. [48,49] Third, the mesopores of the catalysts ensuret he facilitated escape of formed O 2 bubbles,t hus meaning the active sites do not overlap and aggregate during the catalytic process. Finally, the mesoporous 5% Ce-CoP/Fe 2 Pw ith large surfacea rea and abundant pores has shortened ions diffusion paths and accelerated mass transfer.…”

Section: Resultsmentioning

confidence: 99%

Ce‐Doped Ordered Mesoporous Cobalt Ferrite Phosphides as Robust Catalysts for Water Oxidation

Huang

Yang

et al. 2020

Chemistry A European J

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Controllable synthesis and rational design of ordered nanostructures are crucial for their renewable energy applications. In this work, am esoporousC oP/Fe 2 Pd oped with 5% Ce by as imple nanocasting methodi sd esigned as as uperior electrocatalyst for the oxygen evolutionr eaction (OER). The well-designed composite delivers an efficient electrocatalytic activity with al ow overpotential of 250 mV at 10 mA cm À2 and excellent long-term stabilityw ith no degradation after 10 ho fe lectrochemical OER test, superior to that of the state-of-the-art RuO 2 electrocatalyst in alkaline electrolyte. Ac omprehensive analysisd emonstratest hat the outstanding OER performance is due to the desirable combination of the highlye xposed active centers in the Ce-doped bimetallic phosphides, efficient mass transfer,a nd effective electron conduction owing to the hierarchically mesoporous hybridization. Furthermore, the synergistic effect between Ce and CoP/Fe 2 Pa ccelerates the migration rate of electrons/ ions and increases the electrochemical active area. This excellent OER performance observed by Ce doping of CoP/ Fe 2 Pm akes them possible candidates toward OER in alkaline electrolytes.

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Section: Resultsmentioning

confidence: 99%

Ce‐Doped Ordered Mesoporous Cobalt Ferrite Phosphides as Robust Catalysts for Water Oxidation

Huang

Yang

et al. 2020

Chemistry A European J

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“…[ 15 ] The XPS spectrum of O1s for Co 4 N@NCNTs in Figure S3d, Supporting Information, can be deconvoluted into two species, CO (82.8%) at 530.9 eV, which is higher than that of CO (17.2%) at 532.7 eV. It has been investigated that CO species take part in the OER catalytic process [11d,16] . In general, it is also known that the nitrogen content and species play a vital role in the electrocatalytic processes of both ORR and OER.…”

Section: Resultsmentioning

confidence: 99%

In Situ Growth of Co₄N Nanoparticles–Embedded Nitrogen‐Doped Carbon Nanotubes on Metal–Organic Framework–Derived Carbon Composite as Highly Efficient Electrocatalyst for Oxygen Reduction and Evolution Reactions

et al. 2020

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Highly efficient and low‐cost bifunctional electrocatalysts for oxygen reduction and evolution reactions (ORR/OER) are central to new generation rechargeable metal–air batteries. Herein, hierarchical microspheres assembled by in situ generated Co4N nanoparticles (Co4N Nps)‐embedded nitrogen‐doped carbon nanotubes (Co4N@NCNTs) are constructed by a facile urea acid (UA)‐assisted pyrolysis of zeolitic imidazole framework (ZIF)‐67. In this strategy, the UA sharply decomposes at 440 °C to carbonaceous gases, which facilitate the nucleation of Co4N Nps for the catalytic growth of the NCNT microspheres structure from the intermediate ZIF‐67 polyhedrons. The as‐prepared Co4N@NCNTs exhibit high N content, abundant Co4N active species, high electron conductivity, and large specific area on a hierarchical micro‐mesoporous structure. Therefore, the Co4N@NCNTs not only exceed Pt/C in terms of ORR half wave potential (0.85 vs 0.83 V) and limiting current density (5.50 vs 5.20 mA cm−2), but also manifest comparable OER activity with Ru/C. In the rechargeable zinc–air battery test, the bifunctional Co4N@NCNTs show excellent performance with high discharge and low charge potentials and relatively stable voltage gap as long as 500 cycles, which greatly outperform those of commercial Pt–Ru/C.

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“…In the present study, Tafel slope was calculated from the slope of plot in inset of Figure 4B to be around 121 mV/dec. Figure 5A shows the comparative performance of the investigated GIZO with that of the other metal based OER electrocatalysts 24‐27 . The durability studies on GIZO catalyst for OER activities was further affirmed by conducting chronopotentiometry (CP) measurements, which is generally used in evaluating the stability of an electrocatalyst.…”

Section: Methodsmentioning

confidence: 93%

Highly efficient overall water splitting performance of gadolinium‐indium‐zinc ternary oxide nanostructured electrocatalyst

et al. 2020

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Summary Metal oxide nanostructures gain specific interest for bifunctional electrocatalytic functions in efficient water splitting reactions. From this perspective, Gd‐In‐Zn‐based ternary oxides were solution processed and studied for oxygen and hydrogen evolution activities under different pH alkaline media. The nanostructure morphology was ascertained using high‐power analytical tools such as scanning and transmission electron microscopes. Signals obtained from X‐ray diffraction data revealed the prevalence of Gd2O3 phase in ternary oxide. Valence state of Gd, In, and Zn ions and their oxide traits was examined using X‐ray photoelectron spectroscopy. Ternary oxides of Gd‐In‐Zn showcased their overall potential for water splitting applications. Overpotential (η) for oxygen and hydrogen (OER/HER) evolution reactions was recorded to be 282 and 271 mV for ±10 mA/cm2. The results demonstrated the processed oxide as an effective OER/HER electrocatalyst with profound Tafel slopes (121/64 mV/dec for OER/HER) and excellent long‐term stability.

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Regulating the active species of Ni(OH)₂ using CeO₂: 3D CeO₂/Ni(OH)₂/carbon foam as an efficient electrode for the oxygen evolution reaction

Abstract: We found that Ni(OH)2 nanosheets of Ni(OH)2/NOSCF decorated with ∼3.3 nm CeO2 NPs displayed enhanced OER performance.

Cited by 156 publications

References 42 publications

Ce‐Doped Ordered Mesoporous Cobalt Ferrite Phosphides as Robust Catalysts for Water Oxidation

Ce‐Doped Ordered Mesoporous Cobalt Ferrite Phosphides as Robust Catalysts for Water Oxidation

In Situ Growth of Co₄N Nanoparticles–Embedded Nitrogen‐Doped Carbon Nanotubes on Metal–Organic Framework–Derived Carbon Composite as Highly Efficient Electrocatalyst for Oxygen Reduction and Evolution Reactions

Highly efficient overall water splitting performance of gadolinium‐indium‐zinc ternary oxide nanostructured electrocatalyst

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Regulating the active species of Ni(OH)2 using CeO2: 3D CeO2/Ni(OH)2/carbon foam as an efficient electrode for the oxygen evolution reaction

Abstract: We found that Ni(OH)2 nanosheets of Ni(OH)2/NOSCF decorated with ∼3.3 nm CeO2 NPs displayed enhanced OER performance.

Cited by 156 publications

References 42 publications

Ce‐Doped Ordered Mesoporous Cobalt Ferrite Phosphides as Robust Catalysts for Water Oxidation

Ce‐Doped Ordered Mesoporous Cobalt Ferrite Phosphides as Robust Catalysts for Water Oxidation

In Situ Growth of Co4N Nanoparticles–Embedded Nitrogen‐Doped Carbon Nanotubes on Metal–Organic Framework–Derived Carbon Composite as Highly Efficient Electrocatalyst for Oxygen Reduction and Evolution Reactions

Highly efficient overall water splitting performance of gadolinium‐indium‐zinc ternary oxide nanostructured electrocatalyst

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Regulating the active species of Ni(OH)₂ using CeO₂: 3D CeO₂/Ni(OH)₂/carbon foam as an efficient electrode for the oxygen evolution reaction

In Situ Growth of Co₄N Nanoparticles–Embedded Nitrogen‐Doped Carbon Nanotubes on Metal–Organic Framework–Derived Carbon Composite as Highly Efficient Electrocatalyst for Oxygen Reduction and Evolution Reactions