FeS2/C Nanowires as an Effective Catalyst for Oxygen Evolution Reaction by Electrolytic Water Splitting

Pan, Kefeng; Zhai, Yingying; Zhang, Jiawei; Yu, Kai

doi:10.3390/ma12203364

Cited by 23 publications

(15 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, developing low-cost, highly efficient and stable electrolyzers from earth-abundant metals is necessary in order to enhance hydrogen production. In recent years, scientists have devoted themselves to developing earth-abundant metals as alternative electrocatalysts, including oxides/hydroxides [14][15][16][17], chalcogenides [18][19][20][21], phosphates [22][23][24], phosphides [25][26][27], perovskite solids [28][29][30], carbides [31], borates [32], etc., for efficient OERs and HERs with suitable overpotentials.…”

Section: Introductionmentioning

confidence: 99%

Construction of FeCo2O4@N-Doped Carbon Dots Nanoflowers as Binder Free Electrode for Reduction and Oxidation of Water

et al. 2020

View full text Add to dashboard Cite

Electrochemical water splitting is known as a potential approach for sustainable energy conversion; it produces H2 fuel by utilizing transition metal-based catalysts. We report a facile synthesis of FeCo2O4@carbon dots (CDs) nanoflowers supported on nickel foam through a hydrothermal technique in the absence of organic solvents and an inert environment. The synthesized material with a judicious choice of CDs shows superior performance in hydrogen and oxygen evolution reactions (HER and OER) compared to the FeCo2O4 electrode alone in alkaline media. For HER, the overpotential of 205 mV was able to produce current densities of up to 10 mA cm−2, whereas an overpotential of 393 mV was needed to obtain a current density of up to 50 mA cm−2 for OER. The synergistic effect between CDs and FeCo2O4 accounts for the excellent electrocatalytic activity, since CDs offer exposed active sites and subsequently promote the electrochemical reaction by enhancing the electron transfer processes. Hence, this procedure offers an effective approach for constructing metal oxide-integrated CDs as a catalytic support system to improve the performance of electrochemical water splitting.

show abstract

Section: Introductionmentioning

confidence: 99%

Construction of FeCo2O4@N-Doped Carbon Dots Nanoflowers as Binder Free Electrode for Reduction and Oxidation of Water

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Generally, in published studies, it is not clearly mentioned how the original properties of FeS 2 are maintained unaltered during the OER process. It is seen that highly active FeS 2 -based electrocatalyst materials used for oxygen evolution, when subject to OER, form a FeO X film by oxidation–desulfurization. , Also, dopant/composite-based FeS 2 is used as an electrocatalyst to enhance the OER performance. ,,, Here, in the present study, it is significant to note that without any composite or doping the FeS 2 /TiO 2 electrode displays good electrocatalytic activity and durability of minimum 14 h toward OER. However, it requires a slightly higher overpotential to yield a high current density, which needs to be lowered, and toward this end, further studies are needed.…”

Section: Results and Discussionmentioning

confidence: 66%

“…Zhi Tan et al reported a nickel-doped Ni-FeS 2 -0.5 electrocatalyst with 100 mA/cm 2 current density at 1.55 V, which exhibited a stability of 15 h . In another study, an FeS 2 /C catalyst delivered 50 mA/cm 2 OER current density at 338 mV overpotential with stable power for 15 h after electrochemical activation . Further, a similar study reported that FeS 2 /C nanoparticles anchored on Ni-foam delivered 10 mA/cm 2 at an overpotential of 240 mV toward the OER with 5 h stability .…”

Section: Results and Discussionmentioning

confidence: 92%

“…It is seen that highly active FeS 2 -based electrocatalyst materials used for oxygen evolution, when subject to OER, form a FeO X film by oxidation−desulfurization. 1,51 Also, dopant/composite-based FeS 2 is used as an electrocatalyst to enhance the OER performance. 33,34,38,39 Here, in the present study, it is significant to note that without any composite or doping the FeS 2 /TiO 2 electrode displays good electrocatalytic activity and durability of minimum 14 h toward OER.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

See 1 more Smart Citation

Physical Barricading at the Nanoscale: Protecting Pyrite from Weathering toward Efficient and Stable Electrocatalysis of the Oxygen Evolution Reaction

Pandey

Gahlawat

Ingole

2020

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

The unique atomic arrangement and excellent charge transfer properties of two-dimensional (2D) metal chalcogenides (MX 2 ; M = transition metal, X = S, Se) make them effective electrocatalysts toward water splitting. But, so far, none of them have been able to replace noble-metal catalysts for the oxygen evolution reaction (OER), and it remains a great challenge to develop these catalysts. Specifically, cost-effective and earth-abundant FeS 2 has shown potential, but it is less acknowledged due to the associated weathering process. Here, we report a spin-coated TiO 2 layer on hydrothermally synthesized 2D-FeS 2 nanoplates to control weathering through physical barricading at the nanoscale. Notably, the electrochemical and chemical weathering studies suggest that the TiO 2 layer stabilized FeS 2 oxidation in alkaline solution, while the latter gets oxidized without TiO 2 overlayers. To the best of our knowledge, this would be the first report on an FeS 2 /TiO 2 photoanode for efficient and stable OER without any composite or doping. It displayed improved long-term durability of OER activity. Moreover, the annealed crystalline leaky TiO 2 layer (∼72 nm) remarkably displayed enhanced charge transfer at the FeS 2 /TiO 2 interface. Also, Mott−Schottky measurements confirmed that the leaky TiO 2 served as a protective layer (physical barrier) against the weathering of FeS 2 . The current study may provide new insights into the rational design of low-cost FeS 2 /TiO 2 layered electrocatalysts for OER and renewable energy applications.

show abstract

“…In the past few decades the use of computational methods in the rational design of novel heterogeneous catalysts has become an accepted strategy to fabricate novel and efficient catalysts [29,40,47–49,52] . Impressive results have been achieved through molecular engineering of carbon based nano‐material by doping and surface functionalization with various hetero‐atoms [32,34,37,38,43,50] . Recently Guan et al [33] .…”

Section: Introductionmentioning

confidence: 99%

First Principle Studies to Tailor Graphene Through Synergistic Effect as a Highly Efficient Electrocatalyst for Oxygen Evolution Reaction

2021

View full text Add to dashboard Cite

The Oxygen Evolution Reaction (OER) is one of the major roadblocks for electrocatalytic oxidation of water (water splitting) and for designing efficient metal‐air batteries. Herein, we present a comprehensive study to design graphene based efficient electrocatalyst, modified by doping with main group elements Al, Si, P, S and co‐doping with B and N, for OER using DFT computations. Four elementary steps in the OER reaction have been traced, free energy change for each elementary step was calculated considering thermodynamic corrections. Out of all the doped models, S doped graphene shows maximum efficiency that was further enhanced by adjusting the concentration of codopants B and N around the active dopant site. Our results show that synergy between codopants B and N and dopant S atom leads to high electrocatalytic efficiency of modified graphene towards OER and brings down the overpotential to as low as 0.44 V.

show abstract

FeS2/C Nanowires as an Effective Catalyst for Oxygen Evolution Reaction by Electrolytic Water Splitting

Cited by 23 publications

References 44 publications

Construction of FeCo2O4@N-Doped Carbon Dots Nanoflowers as Binder Free Electrode for Reduction and Oxidation of Water

Construction of FeCo2O4@N-Doped Carbon Dots Nanoflowers as Binder Free Electrode for Reduction and Oxidation of Water

Physical Barricading at the Nanoscale: Protecting Pyrite from Weathering toward Efficient and Stable Electrocatalysis of the Oxygen Evolution Reaction

First Principle Studies to Tailor Graphene Through Synergistic Effect as a Highly Efficient Electrocatalyst for Oxygen Evolution Reaction

Contact Info

Product

Resources

About