Catalyzing overall water splitting at an ultralow cell voltage of 1.42 V via coupled Co-doped NiO nanosheets with carbon

Yang, Hongyuan; Chen, Ziliang; Hao, Weiju; Xu, Hongbin; Guo, Yanhui; Wu, Renbing

doi:10.1016/j.apcatb.2019.04.021

Cited by 101 publications

(55 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another method is a CV test relative to a reversible hydrogen electrode (RHE) calibration. [64] Specifically, CV was recorded in a high-purity hydrogen saturated electrolyte solution at a scanning rate of 1 mV s À 1 using a Pt wire or a Pt plate as a working electrode and a counter electrode. The average value of the two potentials at the zero current crossing point was used as the thermodynamic potential of the hydrogen electrode reaction.…”

Section: Calibration Of the Reference Electrodementioning

confidence: 99%

“…The accuracy of the reference electrode was analyzed by comparing the standard redox potentials of Fe 2+ /Fe 3+ . Another method is a CV test relative to a reversible hydrogen electrode (RHE) calibration . Specifically, CV was recorded in a high‐purity hydrogen saturated electrolyte solution at a scanning rate of 1 mV s −1 using a Pt wire or a Pt plate as a working electrode and a counter electrode.…”

Section: Catalytic Activity Parametermentioning

confidence: 99%

See 1 more Smart Citation

Recent Advances in Layered Tungsten Disulfide as Electrocatalyst for Water Splitting

Wen

Zhang

et al. 2020

ChemCatChem

View full text Add to dashboard Cite

Electrocatalytic decomposition of water is an effective method to solve the energy and environmental crisis brought about by fossil fuel combustion. Due to its low cost and abundant resources, non-precious metal catalysts have achieved rapid development and are widely used in the electrolysis of water. Among these catalysts, WS 2 is known as a potential candidate for water decomposition catalysts because of its unique physical and chemical properties and crystal structure. Therefore, we summarize the application of WS 2 in the field of electrolysis water splitting. First, the crystal structure, the principle of HER/OER, and the performance evaluation parameters are introduced. Then it focuses on the preparation and structure control of WS 2 , the method, and the mechanism of performance optimization. Finally, the research on theoretical calculations of WS 2 and a discussion about the opportunities and challenges of WS 2 as electrocatalyst in the future are summarized. To improve the readability of this review, a concise overview at the end of each section gives some of the characteristics and trends of the studies in the corresponding part.

show abstract

Section: Calibration Of the Reference Electrodementioning

confidence: 99%

Section: Catalytic Activity Parametermentioning

confidence: 99%

Recent Advances in Layered Tungsten Disulfide as Electrocatalyst for Water Splitting

Wen

Zhang

et al. 2020

ChemCatChem

View full text Add to dashboard Cite

show abstract

“…The corresponding EIS results and their parameters errors are also displayed in Table S2. [28][29][30][31][32] The R ct of Cu (OH) 2 @Co(OH) 2 (4.6 Ω) is smaller than that of Cu(OH) 2 (9.7 Ω), suggesting the smaller charge-diffusion resistance of Cu (OH) 2 @Co(OH) 2 at the interface, and thus resulting in the faster charge diffusion kinetics and higher reaction rates. Combining with overpotential and Tafel results, it reveals that the OER activity of Cu(OH) 2 nanowires are remarkably improved by the electrodeposition of Co(OH) 2 nanoflakes.…”

mentioning

confidence: 99%

Hierarchical Cu(OH)₂@Co(OH)₂ Nanotrees for Water Oxidation Electrolysis

Tang

Courté

et al. 2020

ChemCatChem

View full text Add to dashboard Cite

In order to achieve highly‐efficient water electrolysis, an effective strategy is to design three‐dimensional hierarchical nanostructures by decorating the surface of the main catalysts with co‐catalytic metal compounds. Herein, leave‐like ultrathin Co(OH)2 nanoflakes are grown on branch‐like Cu(OH)2 nanowires via the combination of an anodization process together with an electrodeposition process. The resulting hierarchical Cu(OH)2@Co(OH)2 nanotrees can be used as efficient OER electrocatalysts with an overpotential as low as 283 mV to reach 10 mA cm−2. After 20 hours of multi‐current density stability test, the electrode shows negligible degradation while retaining an overpotential of 290 mV to reach 10 mA cm−2, thus showing a high electrocatalytic capability and stability. This work provides a new strategy to improve transition metal electrocatalysts in view of low‐cost water oxidation in alkaline media.

show abstract

“…Hydrogen has become one of the most promising energy carriers due to its highest gravimetric energy density and carbon‐free emission . Electrochemical water splitting provides a green and sustainable way for hydrogen fuel production especially when it was integrated with other intermittent energy sources (e.g., wind and solar).…”

mentioning

confidence: 99%

Boronization‐Induced Ultrathin 2D Nanosheets with Abundant Crystalline–Amorphous Phase Boundary Supported on Nickel Foam toward Efficient Water Splitting

Fei

Cai

et al. 2019

Advanced Energy Materials

Self Cite

250

116

View full text Add to dashboard Cite

The conversion of crystalline metal–organic frameworks (MOFs) into metal compounds/carbon hybrid nanocomposites via pyrolysis provides a promising solution to design electrocatalysts for electrochemical water splitting. However, pyrolyzing MOFs generally involves a complex high‐temperature treatment, which can destroy the coordinated surroundings within MOFs, and as a result not taking their full advantage of their electrolysis properties. Herein, a simple and room‐temperature boronization strategy is developed to convert nickel zeolite imidazolate framework (Ni‐ZIF) nanorods into ultrathin Ni‐ZIF/NiB nanosheets with abundant crystalline–amorphous phase boundaries. The combined experiment, and theoretical calculation results disclose that the ultrathin thickness allows fast electron transfer and ensures increased exposure of surface coordinatively unsaturated active sites while the crystalline–amorphous interface elaborately changes the potential‐determining step to energetically favorable intermediates. As a result, Ni‐ZIF/NiB nanosheets supported on nickel foam (NF) require overpotentials of 67 mV for the hydrogen evolution reaction and 234 mV for the oxygen evolution reaction to achieve a current density of 10 mA cm−2. Remarkably, Ni‐ZIF/NiB@NF as a bifunctional electrocatalyst for overall water splitting enables an alkaline electrolyzer with 10 mA cm−2 at an ultralow cell voltage of 1.54 V. The present work may open a new avenue to the design of MOF‐derived composites for electrocatalysis.

show abstract

Catalyzing overall water splitting at an ultralow cell voltage of 1.42 V via coupled Co-doped NiO nanosheets with carbon

Cited by 101 publications

References 61 publications

Recent Advances in Layered Tungsten Disulfide as Electrocatalyst for Water Splitting

Recent Advances in Layered Tungsten Disulfide as Electrocatalyst for Water Splitting

Hierarchical Cu(OH)₂@Co(OH)₂ Nanotrees for Water Oxidation Electrolysis

Boronization‐Induced Ultrathin 2D Nanosheets with Abundant Crystalline–Amorphous Phase Boundary Supported on Nickel Foam toward Efficient Water Splitting

Contact Info

Product

Resources

About

Catalyzing overall water splitting at an ultralow cell voltage of 1.42 V via coupled Co-doped NiO nanosheets with carbon

Cited by 101 publications

References 61 publications

Recent Advances in Layered Tungsten Disulfide as Electrocatalyst for Water Splitting

Recent Advances in Layered Tungsten Disulfide as Electrocatalyst for Water Splitting

Hierarchical Cu(OH)2@Co(OH)2 Nanotrees for Water Oxidation Electrolysis

Boronization‐Induced Ultrathin 2D Nanosheets with Abundant Crystalline–Amorphous Phase Boundary Supported on Nickel Foam toward Efficient Water Splitting

Contact Info

Product

Resources

About

Hierarchical Cu(OH)₂@Co(OH)₂ Nanotrees for Water Oxidation Electrolysis