Nitrogen-doped MoS2/carbon as highly oxygen-permeable and stable catalysts for oxygen reduction reaction in microbial fuel cells

Liang, Hao; Yu, Jingkun; Xu, Xin; Liu, Yang; Xing, Zipeng; Dai, Ying; Sun, Ye; Zou, Jinlong

doi:10.1016/j.jpowsour.2016.11.041

Cited by 136 publications

(39 citation statements)

References 53 publications

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“…Particularly, molybdenum sulfide (MoS 2 ), as a representative 2D layered transition‐metal sulfide, possesses high electrochemical activity, a unique three‐atom‐layer (S–Mo–S) structure, and outstanding chemical stability . Furthermore, MoS 2 is a cost‐effective and robust catalyst, which has displayed a highly effective catalytic effect in several important reactions including the oxygen evolution reaction, oxygen reduction reaction, and hydrogen evolution reaction . It has been reported that sulfur vacancies formed at the edges of Mo and S were favorable to hydrodesulfurization reactions, which shows their significant potential as electrocatalysts for Li–S batteries .…”

Section: Introductionmentioning

confidence: 80%

Rational Fabrication of Nitrogen and Sulfur Codoped Carbon Nanotubes/MoS₂ for High‐Performance Lithium–Sulfur Batteries

Xiang

Wen

et al. 2019

ChemSusChem

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Section: Introductionmentioning

confidence: 80%

Rational Fabrication of Nitrogen and Sulfur Codoped Carbon Nanotubes/MoS₂ for High‐Performance Lithium–Sulfur Batteries

Xiang

Wen

et al. 2019

ChemSusChem

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“…However, the above‐mentioned Fe‐N‐C catalysts usually serve as efficient alternatives for ORR in alkaline or acidic conditions, whereas most of these catalysts are inactive under neutral conditions. In fact, to have the ORR operate under neutral conditions for microbial fuel cells is as important as the ORR for hydrogen‐oxygen fuel cells operating in alkaline or acidic solutions . From the viewpoint of practical applications, it would be a significant advance to design adaptable ORR catalysts that could be equally efficient in acidic, alkaline, and neutral conditions.…”

Section: Introductionmentioning

confidence: 92%

Fe/Fe₃C Nanoparticles Encapsulated in N‐Doped Hollow Carbon Spheres as Efficient Electrocatalysts for the Oxygen Reduction Reaction over a Wide pH Range

Liu

Wang

Zhao

et al. 2019

Chemistry A European J

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Nonprecious‐metal‐based electrocatalysts with low cost, high activity, and stability are considered as one of the most promising alternatives to Pt‐based catalysts for the oxygen reduction reaction (ORR). Herein, an economical and easy‐to‐fabricate catalyst is developed, that is, Fe/Fe3C embedded in N‐doped hollow carbon spheres (Fe/Fe3C/NHCS), which gave the half‐wave potential of 0.84 V in 0.1 m KOH, similar to the commercial Pt/C catalyst. Surprisingly, the favorable ORR performance of the as‐prepared catalyst was obtained in both acidic and neutral conditions with almost a four‐electron pathway and low H2O2 yield, which desirable the development of the proton exchange membrane (PEM) and microbial electrolysis cell (MEC) technology. Additionally, the obtained catalyst demonstrated better long‐term stability and high methanol tolerance over a wide range of pH. These features could be mainly attributed to the synergistic effect between Fe/Fe3C and Fe‐Nx sites, the hollow structure with mesopores, and the well‐dispersed Fe/Fe3C nanoparticles owing to the existence of the abundant hydrophilic groups within the HCS precursor. As such, designing an efficient and cheap ORR catalyst that can operate at alkaline, acidic, and neutral solutions is highly desirable, yet challenging.

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“…In addition, heteroatom doping in MoS 2 has also shown some encouraging results for ORR both experimentally and theoretically where the dopant act as a catalytic site. [62][63][64][65][66][67][68][69][70]71] Thus, motivated by these ongoing advancements, in this paper we perform a detailed analysis of various N-and P-doped TMDs (MoS 2 , MoSe 2 , WS 2, and WSe 2 ) for their possible application as a high-performance electrocatalyst for ORR. Our density functional theory (DFT) computations reveal that N-/Pdoping at a single S/Se vacancy is energetically more favourable in metal-rich conditions.…”

Section: Introductionmentioning

confidence: 99%

Activating Transition Metal Dichalcogenides by Substitutional Nitrogen‐Doping for Potential ORR Electrocatalysts

2018

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One of the challenging goals in the large‐scale realization of hydrogen‐based fuel cells is to replace or minimize the use of expensive Pt‐based electrocatalysts to reduce molecular oxygen at the cathode. Recently, non‐metal doped nanosheets of transition metal dichalcogenides (TMDs) have emerged as a promising Pt‐free electrocatalyst for hydrogen evolution reaction. Herein, we investigate the potential of nitrogen‐ and phosphorus‐ (N‐ and P‐) doped TMDs (MoS2, MoSe2, WS2, and WSe2) as high‐performing electrocatalysts for ORR using first principle calculations, motivated by recent experimental advances to incorporate single S/Se vacancies on the surface of TMD monolayers using electrochemical methods. We observed a strong hybridization of p‐orbitals of N/P atom with the p‐ and d‐orbitals of neighbouring S/Se and Mo/W atoms, respectively, activating pristine TMDs by increasing density of states near Fermi‐level. Based on the free energy profiles of the four‐electron reduction process, we expect that N‐TMDs to be efficient in catalyzing ORR, whereas, too strong binding of reaction intermediates prevents ORR on P‐TMDs. Among the candidates considered, N‐WS2 is found to be a promising TMD as ORR catalyst with the overpotential as low as 0.31 V, stimulating further experimental studies.

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Nitrogen-doped MoS2/carbon as highly oxygen-permeable and stable catalysts for oxygen reduction reaction in microbial fuel cells

Cited by 136 publications

References 53 publications

Rational Fabrication of Nitrogen and Sulfur Codoped Carbon Nanotubes/MoS₂ for High‐Performance Lithium–Sulfur Batteries

Rational Fabrication of Nitrogen and Sulfur Codoped Carbon Nanotubes/MoS₂ for High‐Performance Lithium–Sulfur Batteries

Fe/Fe₃C Nanoparticles Encapsulated in N‐Doped Hollow Carbon Spheres as Efficient Electrocatalysts for the Oxygen Reduction Reaction over a Wide pH Range

Activating Transition Metal Dichalcogenides by Substitutional Nitrogen‐Doping for Potential ORR Electrocatalysts

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Nitrogen-doped MoS2/carbon as highly oxygen-permeable and stable catalysts for oxygen reduction reaction in microbial fuel cells

Cited by 136 publications

References 53 publications

Rational Fabrication of Nitrogen and Sulfur Codoped Carbon Nanotubes/MoS2 for High‐Performance Lithium–Sulfur Batteries

Rational Fabrication of Nitrogen and Sulfur Codoped Carbon Nanotubes/MoS2 for High‐Performance Lithium–Sulfur Batteries

Fe/Fe3C Nanoparticles Encapsulated in N‐Doped Hollow Carbon Spheres as Efficient Electrocatalysts for the Oxygen Reduction Reaction over a Wide pH Range

Activating Transition Metal Dichalcogenides by Substitutional Nitrogen‐Doping for Potential ORR Electrocatalysts

Contact Info

Product

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Rational Fabrication of Nitrogen and Sulfur Codoped Carbon Nanotubes/MoS₂ for High‐Performance Lithium–Sulfur Batteries

Rational Fabrication of Nitrogen and Sulfur Codoped Carbon Nanotubes/MoS₂ for High‐Performance Lithium–Sulfur Batteries

Fe/Fe₃C Nanoparticles Encapsulated in N‐Doped Hollow Carbon Spheres as Efficient Electrocatalysts for the Oxygen Reduction Reaction over a Wide pH Range