Updates on the development of nanostructured transition metal nitrides for electrochemical energy storage and water splitting

Balogun, Muhammad‐Sadeeq; Huang, Yongchao; Qiu, Weitao; Yang, Hao; Ji, Hongbing

doi:10.1016/j.mattod.2017.03.019

Cited by 348 publications

(174 citation statements)

References 277 publications

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“…Additionally, numerous undesirable interfaces and extra resistance are inevitably introduced leading to higher overpotentials. [29] On the other hand, the synthetic condition for the Co 9 S 8 -base catalysts in these published works is always harsh with high temperature sintering and heavily polluted by using H 2 S or organic precursors with sulfur sources (such as thiourea and trithiocyanuric acid). [30][31][32] In such a context, green and low-temperature sulfurization method must be established to fabricate high-activity binder-free Co 9 S 8 -base catalysts to achieve high performance.…”

Section: Doi: 101002/advs201700772mentioning

confidence: 99%

Hollow TiO₂@Co₉S₈ Core–Branch Arrays as Bifunctional Electrocatalysts for Efficient Oxygen/Hydrogen Production

et al. 2017

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water splitting is recognized as a highly potential technology to convert electricity into environment friendly and renewable chemical fuels (hydrogen and oxygen). [1][2][3] The cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER) depend heavily on the development of cost-effective high-performance electrocatalysts. [4,5] Currently, platinum (Pt)/Pt-based alloy and iridium/ruthenium oxides (IrO 2 /RuO 2 ) are considered as the most promising electrocatalysts for HER and OER, respectively, but their scarcity, high cost, and compromised stability hinder their widespread applications. [6,7] Additionally, the best working situation for those OER and HER catalysts is often mismatchable since OER preferably takes place in alkaline or neutral solution while HER in acidic medium. [8,9] This would cause compromised performance for overall water splitting. For instance, the commercial alkaline electrolyzers require high cell voltages (1.8-2.0 V) to drive water splitting, [10] far ahead of the theoretical value of ≈1.23 V owing to high overpotentials on the sluggish of OER and HER. Therefore, it is highly desirable to explore alternative high-performance and low-cost bifunctional OER/HER electrocatalysts for overall water splitting. [11][12][13][14][15] Over the past decades, great progress has been achieved on the development of non-noble metal-based electrocatalysts for both OER and HER. Various nonprecious metal oxides, [9] sulfides, [16] selenides, [17] phosphides, and nitrides [18,19] have been exploited. Among these electrocatalysts, cobalt sulfide (Co 9 S 8 ) is regarded as an attractive electrocatalyst for water splitting due to its high catalytic activity for HER and OER simultaneously, and excellent electrochemical stability. In comparison to bulk Co 9 S 8 , nanostructured Co 9 S 8 and its composites could afford more active sites and faster transfer rate of ions/electrons during the electrocatalytic reaction, and thus usually exhibiting enhanced HER and OER activities. [20][21][22][23][24] Currently, several Co 9 S 8 nanostructures (e.g., nanoparticles [25] and nanospheres [26] ) and their composites with carbons (Co 9 S 8 /reduced graphene oxides (RGO), [22] Co 9 S 8 /(N, S, P)-doped carbons, [27] Co 9 S 8 /Fe 3 O 4 / RGO, [23] and Co 9 S 8 /MoS 2 /Carbon fibres [25] ) have been reported. For example, Co 9 S 8 /N,P-carbon powder nanocomposites prepared by molten-salt calcination method at 900 °C exhibited an HER overpotential of 261 mV at 10 mA cm −2 in alkaline medium. [20] N-Co 9 S 8 /graphene nanocomposites was achieved Designing ever more efficient and cost-effective bifunctional electrocatalysts for oxygen/hydrogen evolution reactions (OER/HER) is greatly vital and challenging. Here, a new type of binder-free hollow TiO 2 @Co 9 S 8 core-branch arrays is developed as highly active OER and HER electrocatalysts for stable overall water splitting. Hollow core-branch arrays of TiO 2 @Co 9 S 8 are readily realized by the rational combination of crosslinked Co 9 S 8 nanoflakes on ...

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Section: Doi: 101002/advs201700772mentioning

confidence: 99%

Hollow TiO₂@Co₉S₈ Core–Branch Arrays as Bifunctional Electrocatalysts for Efficient Oxygen/Hydrogen Production

et al. 2017

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“…Great interest on the study of energy storage and conversion systems has tremendously increases due to ever demanding concerns over energy crises and environmental issues . As electrochemical water splitting is recently progressing study area for energy conversion system especially oxygen reduction, oxygen and hydrogen evolution reactions, likewise lithium ion batteries remains one the most promising sources of energy storage device .…”

Section: Figurementioning

confidence: 99%

“…O 2 − to efficiently react with the organic molecule. Similar phenomena have been reported for other metal oxides catalysts . Pristine 3D‐Co 3 O 4 was subjected to further treatment in 1 M NaBH 4 at different time to determine the effect of oxygen vacancy on the formation of the pristine sample.…”

Section: Figurementioning

confidence: 99%

Oxygen‐Deficient Three‐Dimensional Porous Co₃O₄ Nanowires as an Electrode Material for Water Oxidation and Energy Storage

et al. 2017

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Energy storage and conversion have become two of the most promising aspects of study, and both fields share a common approach in the search for new and advanced materials to store/convert energy and catalyze electrochemical reactions. Owing to their environmental friendliness, transition‐metal oxides have been widely applied as electrode materials for energy systems. However, the application of these metal oxides, in one way or another, tends to suffer from several disadvantages, which urge many researchers to concentrate on improving the performance of the metal oxides so as to meet the demand of different applications. Herein, oxygen vacancies were introduced into 3D Co3O4 nanowires and utilized as suitable electrodes for water oxidation and lithium‐ion batteries.

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“…Precious‐metal‐based electrocatalysts exhibit the highest catalytic activity to reduce the overpotential requirement, but the high cost, scarcity and low stability of these catalysts have hindered their widespread application greatly . Therefore, substantial efforts have been devoted to develop highly efficient and inexpensive materials by reducing the noble metal usage or by exploring viable alternatives . There are two common approaches to enhance the activity of an electrocatalyst: (1) by increasing the quality of each active site (e.g., normally by modulating the electronic configuration) and (2) by increasing the number of active sites at a specific mass loading and electrode area (e.g., by engineering the structure and morphology to expose more active sites) .…”

Section: Introductionmentioning

confidence: 99%

Porosity‐Engineering of MXene as a Support Material for a Highly Efficient Electrocatalyst toward Overall Water Splitting

Tran

Hong

et al. 2020

ChemSusChem

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The use of 2 D transition metal carbide MXenes as support materials to incorporate catalytically active compounds is of interest because of their unique properties. However, the preparation of well‐dispersed catalytic phases on the inter‐connected porous MXene network is challenging and has been rarely explored. This work focuses on the synthesis of basal‐plane‐porous titanium carbide MXene (ac‐Ti3C2) that is used subsequently as an effective host for the incorporation of a known catalytically active phase (IrCo) as an effective bifunctional electrocatalyst toward water splitting. The porous ac‐Ti3C2 with abundant macro/meso/micropores is prepared by a wet chemical method at room temperature and provides ideal anchor sites for intimate chemical bonding with alien compounds. The resulting IrCo@ac‐Ti3C2 electrocatalyst exhibits an excellent reactivity (220 mV at 10 mA cm−2) towards the oxygen evolution reaction in 1.0 m KOH, which surpasses that of the benchmark RuO2, a low voltage cell of 1.57 V (@ 10 mA cm−2) and good long‐term durability. Our work demonstrates the effectiveness of porosity engineering in MXene nanosheets as a support material to shorten ion migration pathways, to increase electrolyte accessibility between inter‐sheets and to overcome inherited re‐stacking and aggregation issues.

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Updates on the development of nanostructured transition metal nitrides for electrochemical energy storage and water splitting

Cited by 348 publications

References 277 publications

Hollow TiO₂@Co₉S₈ Core–Branch Arrays as Bifunctional Electrocatalysts for Efficient Oxygen/Hydrogen Production

Hollow TiO₂@Co₉S₈ Core–Branch Arrays as Bifunctional Electrocatalysts for Efficient Oxygen/Hydrogen Production

Oxygen‐Deficient Three‐Dimensional Porous Co₃O₄ Nanowires as an Electrode Material for Water Oxidation and Energy Storage

Porosity‐Engineering of MXene as a Support Material for a Highly Efficient Electrocatalyst toward Overall Water Splitting

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Updates on the development of nanostructured transition metal nitrides for electrochemical energy storage and water splitting

Cited by 348 publications

References 277 publications

Hollow TiO2@Co9S8 Core–Branch Arrays as Bifunctional Electrocatalysts for Efficient Oxygen/Hydrogen Production

Hollow TiO2@Co9S8 Core–Branch Arrays as Bifunctional Electrocatalysts for Efficient Oxygen/Hydrogen Production

Oxygen‐Deficient Three‐Dimensional Porous Co3O4 Nanowires as an Electrode Material for Water Oxidation and Energy Storage

Porosity‐Engineering of MXene as a Support Material for a Highly Efficient Electrocatalyst toward Overall Water Splitting

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Hollow TiO₂@Co₉S₈ Core–Branch Arrays as Bifunctional Electrocatalysts for Efficient Oxygen/Hydrogen Production

Hollow TiO₂@Co₉S₈ Core–Branch Arrays as Bifunctional Electrocatalysts for Efficient Oxygen/Hydrogen Production

Oxygen‐Deficient Three‐Dimensional Porous Co₃O₄ Nanowires as an Electrode Material for Water Oxidation and Energy Storage