Cobalt-molybdenum nanosheet arrays as highly efficient and stable earth-abundant electrocatalysts for overall water splitting

Zhang, Ying; Shao, Qi; Long, Shui; Huang, Xiaoqing

doi:10.1016/j.nanoen.2018.01.022

Cited by 273 publications

(126 citation statements)

References 41 publications

Supporting

Mentioning

122

Contrasting

Order By: Relevance

“…When the flake structure decreases, the overpotential increases significantly, such as tight‐binding microsheet of 337 mV and 360 mV at 10 mA cm −2 and 20 mA cm −2 . Tafel slope is an important parameter to access the reaction kinetics during the electrocatalytic process (Figure b) . Tafel plots of microsheets displays a smaller Tafel slope (89 mV dec −1 ) than that of the others, suggesting that the microsheet exhibits faster reaction kinetics (Figure S3).…”

Section: Figurementioning

confidence: 99%

“…Tafel slope is an important parameter to access the reaction kinetics during the electrocatalytic process (Figure 3b). [14] Tafel plots of microsheets displays a smaller Tafel slope (89 mV dec À 1 ) than that of the others, suggesting that the microsheet exhibits faster reaction kinetics ( Figure S3). The catalytic performance of CuCo 2 S 4 -0 is comparable to that of RuO 2 , referring to RuO 2 Tafel slopes of 67 mV dec À 1 ( Figure S4).…”

Section: Studying the Effect Of Cuco 2 S 4 Morphology On The Oxygen Ementioning

confidence: 99%

See 1 more Smart Citation

Studying the Effect of CuCo₂S₄ Morphology on the Oxygen Evolution Reaction using a Flexible Carbon Cloth Substrate

Cui

Song

et al. 2020

ChemElectroChem

View full text Add to dashboard Cite

The different morphologies of CuCo2S4 have a significant effect on the electrocatalytic activity. However, the reasons for the activity difference of catalysts with multiple morphologies have raised little concern. Herein, we put forward the concept of “active edge perimeter” to evaluate the relative number of active sites. The morphologies are regulated by arranging NH4F from 0 to 3 mmol to prepare microsheet, tight‐binding microsheet, hybrid microsheet/wire, long microwire and short wire morphologies. The long‐perimeter microsheets can achieve a low Tafel slope (89 mV dec−1) and overpotential (283 mV) to reach a current density of 20 mA cm−2 for the oxygen evolution reaction. For microsheets, the charge‐transfer resistance is well under 50 % of the average values. The electrochemical surface area is above average area, owing to the high double‐layer capacitance. Therefore, for two‐dimensional microsheets, the long active perimeter is the main reason it ensures the high activity required for hierarchical catalysts.

show abstract

Section: Figurementioning

confidence: 99%

Section: Studying the Effect Of Cuco 2 S 4 Morphology On The Oxygen Ementioning

confidence: 99%

Studying the Effect of CuCo₂S₄ Morphology on the Oxygen Evolution Reaction using a Flexible Carbon Cloth Substrate

Cui

Song

et al. 2020

ChemElectroChem

View full text Add to dashboard Cite

show abstract

“…For example, building the catalysts into nanosized architecture or constructing a highly open structure by etching or annealing process is a commonly used strategy for increasing the numbers of active sites, which provides more active sites for performance improvement. Another way is in situ growing the catalysts on the conductive and porous substrates, such as carbon nanowires and nickel foam . This approach not only enlarges the loadings, but also improves the stability for the strong bonding between the catalysts and substrates.…”

Section: Fundamentals Of Oxygen Evolution Reactionsmentioning

confidence: 99%

The Design of Water Oxidation Electrocatalysts from Nanoscale Metal–Organic Frameworks

Shao

Yang

Huang

2018

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

Metal-organic frameworks (MOFs), as the shining stars in field of materials science, have become an important class of highly efficient catalysts for electrochemical oxygen evolution reaction (OER). Although tremendous progresses have been achieved by exploring two MOF-based groups: the MOF-derived electrocatalysts and the direct MOF electrocatalysts in recently years, it appears that both activity and stability of these two kinds of MOF-based electrocatalysts have big rooms for improvement. In order to overcome these issues, a comprehensive summary of the advanced designs of catalysts is timely urgent. Here, the advanced engineering strategies including structural, carbon-based, metal-based and substrate-engineered strategies of MOF-derived catalysts have been introduced. In addition, the detailed explorations of the nanostructured direct MOF catalysts for OER are also reviewed. Finally, short comments and perspectives about the future development of the MOF-based OER electrocatalysts are provided.

show abstract

“…[19][20][21] Although water electrolysis has al ong history,c ontinuoust echnological improvement and materiali nnovation aimed at reducing costs remain huge challenges for industrial applications. [24,25] Recently,t ransition metal sulfides (TMS) such as MoS 2 , [26][27][28][29] Ni 3 S 2 , [30,31] NiS, [32] CoS, [33] Co 7 S 4 , [34] and so on, have been well investigated as satisfactory electrocatalysts. [24,25] Recently,t ransition metal sulfides (TMS) such as MoS 2 , [26][27][28][29] Ni 3 S 2 , [30,31] NiS, [32] CoS, [33] Co 7 S 4 , [34] and so on, have been well investigated as satisfactory electrocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Hatted 1T/2H‐Phase MoS₂ on Ni₃S₂ Nanorods for Efficient Overall Water Splitting in Alkaline Media

Wei

Wang

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

An ew hatted 1T/2H-phaseM oS 2 on Ni 3 S 2 nanorods, as ab ifunctionale lectrocatalyst for overall water splitting in alkaline media, is prepared through as imple one-pot hydrothermals ynthesis. The hat-rod structurei sc omposed mainly of Ni 3 S 2 ,w ith 1T/2H-MoS 2 adhered to the top of the growth.A queousa mmonia plays an importantr ole in forming the 1T-phaseM oS 2 by twisting the 2H-phase transition and expanding the interlayer spacing throught he intercalation of NH 3 /NH 4 + .O wing to the special "hat-like" structure, the electronsc onduct easily from Ni foam along Ni 3 S 2 to MoS 2 ,a nd the catalyst particles maintain sufficient contact with the electrolyte, with gaseous molecules produced by waters plitting easily removedf rom the surface of the catalyst. Thus, the electrocatalytic performance is enhanced, with an overpotential of 73 mV,aTa fel slope of 79 mV dec À1 ,a nd excellent stability,a nd the OER demonstrates an overpotential of 190 mV and Tafel slope of 166 mV dec À1 .

show abstract

Cobalt-molybdenum nanosheet arrays as highly efficient and stable earth-abundant electrocatalysts for overall water splitting

Cited by 273 publications

References 41 publications

Studying the Effect of CuCo₂S₄ Morphology on the Oxygen Evolution Reaction using a Flexible Carbon Cloth Substrate

Studying the Effect of CuCo₂S₄ Morphology on the Oxygen Evolution Reaction using a Flexible Carbon Cloth Substrate

The Design of Water Oxidation Electrocatalysts from Nanoscale Metal–Organic Frameworks

Hatted 1T/2H‐Phase MoS₂ on Ni₃S₂ Nanorods for Efficient Overall Water Splitting in Alkaline Media

Contact Info

Product

Resources

About

Cobalt-molybdenum nanosheet arrays as highly efficient and stable earth-abundant electrocatalysts for overall water splitting

Cited by 273 publications

References 41 publications

Studying the Effect of CuCo2S4 Morphology on the Oxygen Evolution Reaction using a Flexible Carbon Cloth Substrate

Studying the Effect of CuCo2S4 Morphology on the Oxygen Evolution Reaction using a Flexible Carbon Cloth Substrate

The Design of Water Oxidation Electrocatalysts from Nanoscale Metal–Organic Frameworks

Hatted 1T/2H‐Phase MoS2 on Ni3S2 Nanorods for Efficient Overall Water Splitting in Alkaline Media

Contact Info

Product

Resources

About

Studying the Effect of CuCo₂S₄ Morphology on the Oxygen Evolution Reaction using a Flexible Carbon Cloth Substrate

Studying the Effect of CuCo₂S₄ Morphology on the Oxygen Evolution Reaction using a Flexible Carbon Cloth Substrate

Hatted 1T/2H‐Phase MoS₂ on Ni₃S₂ Nanorods for Efficient Overall Water Splitting in Alkaline Media