Controlled synthesis of Ni3C/nitrogen-doped carbon nanoflakes for efficient oxygen evolution

Jing, Hao; Zheng, Yiteng; Luo, Wenhao; Jin, Cen; Wang, Ran; Wang, Zhen; Zheng, Wenjun

doi:10.1016/j.electacta.2019.134631

Cited by 28 publications

(16 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…LSV curves of synthesised NiCo-NCS electrocatalytic material, commercial iridium-supported carbon electrocatalyst, i. e. Ir/ C (20 wt % Ir) and bare nickel foam are shown in Figure 4(a). The onset potentials for NiCo-NCS and Ir/C were found to be 1.45 mV and 1.44 mV respectively, while the overpotential at a current density of 10 mA/cm 2 for NiCo-NCS was found to be 310 mV which was just 5 mV higher than the commercial Ir/C (20 wt % Ir) while it was comparable to that of nickel carbide nanoparticle embedded in two-dimensional (2D) nitrogendoped carbon nanoflakes [8] (Ni 3 C/NC nanoflakes) i. e. 309 mV, however, synthesis conditions of Ni 3 C/NC nanoflakes are generally harsh and tedious. On the other hand, carbonaceous OER electrocatalytic material reported in our previous reports [17(d),(f)] show comparatively higher overpotential and multistep synthesis routes, thus NiCo-NCS has added advantage of ChemistrySelect having facile and simple growth conditions.…”

Section: Resultsmentioning

confidence: 88%

“…[5] Nanotechnology has great potential for the development of non-noble metal-based OER electrocatalysts to replace noble metal-based counterparts, especially by nanoscale surface manipulations of earth's abundant first row transition metals, such as Ni, Co, Fe, Cr, Mn, V, etc. [6] In this regard, transition metal oxide, [7] carbide [8] and sulphide [9] nanostructures have been greatly investigated. For instance, L. Trotochaud et al [10] have fabricated Fe, Ni, and mixed metal oxide thin films for OER electrocatalysis.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

^“In‐Situ Grown Nickel‐Cobalt (NiCo) Alloy Nanoparticles Decorated on Petal‐Like Nitrogen‐Doped Carbon Spheres for Efficient OER Activity^”**

et al. 2022

View full text Add to dashboard Cite

Herein, we report in-situ NiCo alloy nanoparticle formation of extremely small diameter (1-5 nm) on nitrogen (N)-doped carbon spheres by the CVD method at 750 °C temperature, followed by its use in oxygen evolution reaction (OER) electrocatalysis. Secondary electron microscope (SEM) imaging shows the open as well as close cup-shaped spheres and discs, while transmission electron microscope (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) studies confirmed the ultrafine NiCo alloy particles' formation on nitrogen-doped multilayer graphitized carbon. Moreover, Raman spectroscopy revealed the I D /I G ratio to be about 1.57 for N-doped graphitic multilayer carbon, thereby suggesting the defective nature of graphitized carbon material, which may possibly be due to the incorporation of nitrogen atoms into graphitic carbon layers. The formation of extremely small NiCo alloy nanoparticles is attributed to the reducing carbonaceous environment of CVD constituted by ethanol and acetonitrile precursors, while carbon spheres/disks seem to be catalysed by silica substrate originated from an alcogel catalyst. In addition, synthesised hybrid nanocomposites materials were tested for OER electrocatalysis in alkaline conditions and it was found that synthesized NiCo alloy nanoparticles decorated on N-doped carbon spheres have an overpotential 310 mV at current density of 10 mA/cm 2 which is just 5 mV higher than that of benchmark Ir/C (20 wt % Ir) electrocatalyst. The multiphase components of synthesised material like; electrically conductive carbon, nitrogen-doped sites and well-separated ultrafine NiCo alloy nanoparticles synergistically contributed towards better OER activity in alkaline conditions.

show abstract

Section: Resultsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

^“In‐Situ Grown Nickel‐Cobalt (NiCo) Alloy Nanoparticles Decorated on Petal‐Like Nitrogen‐Doped Carbon Spheres for Efficient OER Activity^”**

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Meanwhile, in situ Raman (Figure h) measurements on the working electrode during chronopotentiometry demonstrated the irreversible generation of NiFeO x H y , suggesting the structural transformation of metal carbide during OER as well. A similar strategy was used to fabricate Ni 3 C nanoparticle-embedded nitrogen-doped carbon flakes . This hybrid material showed good OER catalytic activity and stability.…”

Section: Materials With Structural Transformation In Oer Electrocatal...mentioning

confidence: 99%

Structural Transformation of Heterogeneous Materials for Electrocatalytic Oxygen Evolution Reaction

et al. 2021

View full text Add to dashboard Cite

Electrochemical water splitting for hydrogen generation is a promising pathway for renewable energy conversion and storage. One of the most important issues for efficient water splitting is to develop cost-effective and highly efficient electrocatalysts to drive sluggish oxygen-evolution reaction (OER) at the anode side. Notably, structural transformation such as surface oxidation of metals or metal nonoxide compounds and surface amorphization of some metal oxides during OER have attracted growing attention in recent years. The investigation of structural transformation in OER will contribute to the indepth understanding of accurate catalytic mechanisms and will finally benefit the rational design of catalytic materials with high activity. In this Review, we provide an overview of heterogeneous materials with obvious structural transformation during OER electrocatalysis. To gain insight into the essence of structural transformation, we summarize the driving forces and critical factors that affect the transformation process. In addition, advanced techniques that are used to probe chemical states and atomic structures of transformed surfaces are also introduced. We then discuss the structure of active species and the relationship between catalytic performance and structural properties of transformed materials. Finally, the challenges and prospects of heterogeneous OER electrocatalysis are presented.

show abstract

“…Besides the limited electrocatalytic activity, a facile synthesis strategy is also extremely demanded owing to the harsh conditions and environmentally unfriendly characteristics of the conventional synthesis methods for Ni 3 C materials, such as sputter deposition technique, ball milling, and diffusion reactions. [ 25,26 ]…”

Section: Introductionmentioning

confidence: 99%

Synergistic Coupling of Ni Nanoparticles with Ni₃C Nanosheets for Highly Efficient Overall Water Splitting

Wang

Qin

et al. 2020

Small

106

View full text Add to dashboard Cite

Exploring earth‐abundant bifunctional electrocatalysts with high efficiency for water electrolysis is extremely demanding and challenging. Herein, density functional theory (DFT) predictions reveal that coupling Ni with Ni3C can not only facilitate the oxygen evolution reaction (OER) kinetics, but also optimize the hydrogen adsorption and water adsorption energies. Experimentally, a facile strategy is designed to in situ fabricate Ni3C nanosheets on carbon cloth (CC), and simultaneously couple with Ni nanoparticles, resulting in the formation of an integrated heterostructure catalyst (Ni–Ni3C/CC). Benefiting from the superior intrinsic activity as well as the abundant active sites, the Ni–Ni3C/CC electrode demonstrates excellent bifunctional electrocatalytic activities toward the OER and hydrogen evolution reaction (HER), which are superior to all the documented Ni3C‐based electrocatalysts in alkaline electrolytes. Specifically, the Ni–Ni3C/CC catalyst exhibits the low overpotentials of only 299 mV at the current density of 20 mA cm−2 for the OER and 98 mV at 10 mA cm−2 for the HER in 1 m KOH. Furthermore, the bifunctional Ni–Ni3C/CC catalyst can propel water electrolysis with excellent activity and nearly 100% faradic efficiency. This work highlights an easy approach for designing and constructing advanced nickel carbide‐based catalysts with high activity based on the theoretical predictions.

show abstract

Controlled synthesis of Ni3C/nitrogen-doped carbon nanoflakes for efficient oxygen evolution

Cited by 28 publications

References 59 publications

^“In‐Situ Grown Nickel‐Cobalt (NiCo) Alloy Nanoparticles Decorated on Petal‐Like Nitrogen‐Doped Carbon Spheres for Efficient OER Activity^”**

^“In‐Situ Grown Nickel‐Cobalt (NiCo) Alloy Nanoparticles Decorated on Petal‐Like Nitrogen‐Doped Carbon Spheres for Efficient OER Activity^”**

Structural Transformation of Heterogeneous Materials for Electrocatalytic Oxygen Evolution Reaction

Synergistic Coupling of Ni Nanoparticles with Ni₃C Nanosheets for Highly Efficient Overall Water Splitting

Contact Info

Product

Resources

About

Controlled synthesis of Ni3C/nitrogen-doped carbon nanoflakes for efficient oxygen evolution

Cited by 28 publications

References 59 publications

“In‐Situ Grown Nickel‐Cobalt (NiCo) Alloy Nanoparticles Decorated on Petal‐Like Nitrogen‐Doped Carbon Spheres for Efficient OER Activity”**

“In‐Situ Grown Nickel‐Cobalt (NiCo) Alloy Nanoparticles Decorated on Petal‐Like Nitrogen‐Doped Carbon Spheres for Efficient OER Activity”**

Structural Transformation of Heterogeneous Materials for Electrocatalytic Oxygen Evolution Reaction

Synergistic Coupling of Ni Nanoparticles with Ni3C Nanosheets for Highly Efficient Overall Water Splitting

Contact Info

Product

Resources

About

^“In‐Situ Grown Nickel‐Cobalt (NiCo) Alloy Nanoparticles Decorated on Petal‐Like Nitrogen‐Doped Carbon Spheres for Efficient OER Activity^”**

^“In‐Situ Grown Nickel‐Cobalt (NiCo) Alloy Nanoparticles Decorated on Petal‐Like Nitrogen‐Doped Carbon Spheres for Efficient OER Activity^”**

Synergistic Coupling of Ni Nanoparticles with Ni₃C Nanosheets for Highly Efficient Overall Water Splitting