A nanostructured nickel–cobalt alloy with an oxide layer for an efficient oxygen evolution reaction

Wu, Lian-Kui; Wu, Wei-Yao; Xia, Jie; Cao, Huazhen; Hou, Guangya; Tang, Yiping

doi:10.1039/c7ta02754k

Cited by 104 publications

(47 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The benchmark catalysts for the OER are still noble metal catalysts, namely IrO 2 in acidic and RuO 2 in alkaline media. [18,19,24,27,[31][32][33][34][35][36][37][38] While the mechanisms of single metal catalysts are understood quiet well, the mechanism and the synergyo fb imetallic systems are less explored. Mn, [20][21][22][23][24] Fe, [24][25][26][27] Co, [6,24,[26][27][28] Ni, [24,26,27,29] and Cu [30] )a nd mixtures of such compounds.…”

Section: Introductionmentioning

confidence: 99%

“…Mn, [20][21][22][23][24] Fe, [24][25][26][27] Co, [6,24,[26][27][28] Ni, [24,26,27,29] and Cu [30] )a nd mixtures of such compounds. [18,19,24,27,[31][32][33][34][35][36][37][38] While the mechanisms of single metal catalysts are understood quiet well, the mechanism and the synergyo fb imetallic systems are less explored. Rossmeisl et al showed that four consecutive energy steps are needed to create oxygen out of water.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of a Highly Efficient Oxygen‐Evolution Electrocatalyst by Incorporation of Iron into Nanoscale Cobalt Borides

et al. 2018

View full text Add to dashboard Cite

High-performance catalysts for the oxygen-evolution reaction in water electrolysis are usually based on expensive and rare elements. Herein, mixed-metal borides are shown to be competitive with established electrocatalysts like noble metal oxides and other transition-metal(oxide)-based catalysts. Iron incorporation into nanoscale dicobalt boride results in excellent activity and stability in alkaline solutions. (Co Fe ) B shows an overpotential of η=0.33 V (1.56 V vs. RHE) at 10 mA cm in 1 m KOH with a very low onset potential of ≈1.5 V vs. RHE, comparable to the performance of IrO and RuO . XPS shows that the original catalyst is modified under the reaction conditions and indicates that CoOOH and Co(OH) are formed as active surface species, whereas the Fe remains in the catalyst, contributing to an improved catalyst performance. The nanoscale borides are obtained by a one-step solution synthesis, calcined, and characterized by XRD, energy-dispersive X-ray spectroscopy, and SEM. Single crystals of (Co Fe ) B grown under chemical transport conditions were used for an unambiguous specification of the nanostructured particles by relating the cobalt/iron ratio to the lattice parameters.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of a Highly Efficient Oxygen‐Evolution Electrocatalyst by Incorporation of Iron into Nanoscale Cobalt Borides

et al. 2018

View full text Add to dashboard Cite

show abstract

“…C 1s peak at 284.8 eV was used as reference. [44][45][46][47][48][49] The corresponding satellite peaks are located at the higher binding energies . [44][45][46][47][48][49] The corresponding satellite peaks are located at the higher binding energies .…”

Section: Sem Xrd Xps and Tem Characterizationmentioning

confidence: 99%

“…In the high-resolution XPS (HRXPS) spectra of Ni 2p (Figure 2c), the binding energies at 852.8 � 0.1 eV and 856.2 � 0.1 eV are indexed to Ni 0 and Ni 3 + , respectively. [44][45][46][47][48][49] The corresponding satellite peaks are located at the higher binding energies . In the HRXPS spectra of Mo 3d (Figure 2d), the peaks at 228.2 � 0.2 eV, 229.2 � 0.2 eV, 230.3 � 0.2 eV, and 232.3 � 0.2 eV eV are indexed to Mo 0 , Mo + 4 , Mo + 5 , and Mo + 6 , respectively.…”

Section: Sem Xrd Xps and Tem Characterizationmentioning

confidence: 99%

Network‐Like Ni_1−xMo_x Nanosheets: Multi‐Functional Electrodes for Overall Water Splitting and Supercapacitor

et al. 2019

View full text Add to dashboard Cite

Exploring efficient, abundant, cheap and stable materials for the electrolysis of water and supercapacitor is a challenging task. Here, Ni 1À x Mo x nanosheets are obtained on carbon cloth (CC), which can be multi-functional electrodes for electrochemical applications. Impressively, we find that the electrochemical abilities can be optimized by constructing network-like nanosheets and tuning the ratio of Ni and Mo in the alloy. To acquire a current density of 10 mA cm À 2 (j 10 ), Ni 0.75 Mo 0.25 /CC shows the lowest overpotentials (79 mV for hydrogen evolution reaction (HER) and 330 mV for oxygen evolution reaction (OER)) in 1 M KOH. Using Ni 0.75 Mo 0.25 /CC as both positive and negative poles, the cell only requires a potential of 1.74 V to reach j 10 and shows long-term durability. We further show that Ni 0.75 Mo 0.25 electrode exhibits a superior specific capacitance (422 F g À 1 at 1 A g À 1 ) and high capacitance retention (108.2 % after 1000 cycles) in 1 M KOH. The super-electrochemical performances of Ni 0.75 Mo 0.25 /CC is attributed to its high electronic conductivity, rich active sites, and large surface area. We believe that the Ni 0.75 Mo 0.25 /CC electrode with extraordinary electrochemical performances is a hopeful material for practical applications in both electrocatalysis and supercapacitors (SC).

show abstract

“…9a-d. Various other alloys including NiCo, NiMo and Ni-B have also been explored as OER catalysts with promising results [112,115,116].…”

Section: Ni-based Alloysmentioning

confidence: 99%

Recent Progresses in Electrocatalysts for Water Electrolysis

Khan

Zhao

Zou

et al. 2018

Electrochem. Energ. Rev.

335

178

View full text Add to dashboard Cite

The study of hydrogen evolution reaction and oxygen evolution reaction electrocatalysts for water electrolysis is a developing field in which noble metal-based materials are commonly used. However, the associated high cost and low abundance of noble metals limit their practical application. Non-noble metal catalysts, aside from being inexpensive, highly abundant and environmental friendly, can possess high electrical conductivity, good structural tunability and comparable electrocatalytic performances to state-of-the-art noble metals, particularly in alkaline media, making them desirable candidates to reduce or replace noble metals as promising electrocatalysts for water electrolysis. This article will review and provide an overview of the fundamental knowledge related to water electrolysis with a focus on the development and progress of non-noble metal-based electrocatalysts in alkaline, polymer exchange membrane and solid oxide electrolysis. A critical analysis of the various catalysts currently available is also provided with discussions on current challenges and future perspectives. In addition, to facilitate future research and development, several possible research directions to overcome these challenges are provided in this article.

show abstract

A nanostructured nickel–cobalt alloy with an oxide layer for an efficient oxygen evolution reaction

Abstract: A nanostructured nickel–cobalt alloy with an oxide layer was fabricated with excellent oxygen evolution reaction activity and good stability.

Cited by 104 publications

References 70 publications

Synthesis of a Highly Efficient Oxygen‐Evolution Electrocatalyst by Incorporation of Iron into Nanoscale Cobalt Borides

Synthesis of a Highly Efficient Oxygen‐Evolution Electrocatalyst by Incorporation of Iron into Nanoscale Cobalt Borides

Network‐Like Ni_1−xMo_x Nanosheets: Multi‐Functional Electrodes for Overall Water Splitting and Supercapacitor

Recent Progresses in Electrocatalysts for Water Electrolysis

Contact Info

Product

Resources

About

A nanostructured nickel–cobalt alloy with an oxide layer for an efficient oxygen evolution reaction

Abstract: A nanostructured nickel–cobalt alloy with an oxide layer was fabricated with excellent oxygen evolution reaction activity and good stability.

Cited by 104 publications

References 70 publications

Synthesis of a Highly Efficient Oxygen‐Evolution Electrocatalyst by Incorporation of Iron into Nanoscale Cobalt Borides

Synthesis of a Highly Efficient Oxygen‐Evolution Electrocatalyst by Incorporation of Iron into Nanoscale Cobalt Borides

Network‐Like Ni1−xMox Nanosheets: Multi‐Functional Electrodes for Overall Water Splitting and Supercapacitor

Recent Progresses in Electrocatalysts for Water Electrolysis

Contact Info

Product

Resources

About

Network‐Like Ni_1−xMo_x Nanosheets: Multi‐Functional Electrodes for Overall Water Splitting and Supercapacitor