An Intriguing Pea‐Like Nanostructure of Cobalt Phosphide on Molybdenum Carbide Incorporated Nitrogen‐Doped Carbon Nanosheets for Efficient Electrochemical Water Splitting

Dutta, Soumen; Indra, Arindam; Han, Houde; Song, Taeseup

doi:10.1002/cssc.201801810

Cited by 57 publications

(36 citation statements)

References 88 publications

(166 reference statements)

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“…Electrochemical splitting of water into molecular hydrogen and oxygen (2H 2 O→O 2 +2H 2 ) is one of the most promising schemes for the sustainable production of clean and renewable fuel such as hydrogen . It is highly desirable to use renewable energy sources to split water into its elemental constituents which can also be lined in with CO 2 capture and conversion (a major environmental pollutant) into storable carbon‐neutral fuels .…”

Section: Introductionmentioning

confidence: 99%

Noble‐Metal‐Free Colloidal‐Copper Based Low Overpotential Water Oxidation Electrocatalyst

et al. 2019

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Water oxidation catalysis is gaining more attention in recent times owing to its potential for solar and chemical energy conversion and for green fuel generation. The overwhelming hurdle in this quest is to develop a noble-metal-free, efficient, low overpotential water oxidation electrocatalyst exhibiting tremendous stability and to be obtained from earth-abundant materials. We show here unique copper-based water oxidation electrocatalyst derived from thin film Cu-colloidal nanoparticles and is highly efficient, robust for water oxidation. The catalyst advantageously exhibits nanobeads and nanorods type mixed morphological features with narrow size distribution. The onset for oxygen evolution reaction occurs at a small potential of 1.45 V RHE (η = 220 mV) which is the lowest observed relative to other copper-based materials. The catalyst also maintains remarkable stability during long-term water electrolysis experiments. Moreover, the catalyst shown to exhibit a high electroactive area with a Tafel slope of 52 mV dec 1À , high TOF of 0.81 s 1À and mass activity of 87 mA mg À 1 . Copper is an interesting material because it can also serve as CO 2 reduction catalysts at the cathode side. The straightforwardly prepared, handy, and inexpensive Cu-based electrocatalytic system is a flexible catalyst for electrooxidation of water and for chemical energy conversion and is an attractive alternative to Pt, Ir, and Ru based electrocatalysts obtained from expensive resources and tedious methods.

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Section: Introductionmentioning

confidence: 99%

Noble‐Metal‐Free Colloidal‐Copper Based Low Overpotential Water Oxidation Electrocatalyst

et al. 2019

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“…Apart from N-CNTs, nitrogen-doped carbon materials (N-CNMs), including carbon nanosheets, were applied for the OER. At the same time, materials based on molybdenum carbide combined with N-CNMs are usually doped with other transition metals, such as cobalt [99,100] and cobalt phosphide [101]. For instance, Zhu X. et al [102] reported cobalt-doped β-molybdenum carbide encapsulated within nitrogen-doped carbon (Co 0.1 -βMo 2 C@NC), which showed superior catalytic activity toward OER.…”

Section: Molybdenum Carbidementioning

confidence: 99%

Recent Advances in Transition Metal Carbide Electrocatalysts for Oxygen Evolution Reaction

Wang

Zhang

et al. 2020

Catalysts

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The electrolysis of water is considered to be a primary method for the mass production of hydrogen on a large scale, as a substitute for unsustainable fossil fuels in the future. However, it is highly restricted by the sluggish kinetics of the four-electron process of the oxygen evolution reaction (OER). Therefore, there is quite an urgent need to develop efficient, abundant, and economical electrocatalysts. Transition metal carbides (TMCs) have recently been recognized as promising electrocatalysts for OER due to their excellent activity, conductivity, and stability. In this review, widely-accepted evaluation parameters and measurement criteria for different electrocatalysts are discussed. Moreover, five sorts of TMC electrocatalysts—including NiC, tungsten carbide (WC), Fe3C, MoC, and MXene—as well as their hybrids, are researched in terms of their morphology and compounds. Additionally, the synthetic methods are summarized. Based on the existing materials, strategies for improving the catalytic ability and new designs of electrocatalysts are put forward. Finally, the future development of TMC materials is discussed both experimentally and theoretically, and feasible modification approaches and prospects of a reliable mechanism are referred to, which would be instructive for designing other effective noble-free electrocatalysts for OER.

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“…This coupling strategy has been mainly applied to design bi‐functional electrode with nanostructure engineering of hybrids. Recently, our group has reported intriguing pea‐like nanohybrid structure of CoP−Mo 2 C derived from metal organic framework . Although Mo 2 C is one of the best HER catalyst, it exhibits a relatively poor OER activity.…”

Section: Self‐supported Bifunctional Oer and Her Catalystmentioning

confidence: 99%

Current Status of Self‐Supported Catalysts for Robust and Efficient Water Splitting for Commercial Electrolyzer

et al. 2019

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The development of cost effective and high-performance electrocatalyst is challenging but essential for realizing industrial hydrogen production by electolyzer. Electrocatalysts for water splitting must have active catalytic performance as well as high stability in strong alkaline or acidic media to be used in commercial elecrolyzer. Transition metal based electrocatalysts are considered as highly promising candidates due to their excellent oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance and stability with low materials cost. Recently, binder free self-supported electrocatalysts based on transition metals have emerged as state-ofthe-art catalytic electrodes due to their high activity and robustness. These properties are attributed to lack of catalyst powder aggregation and a strong synergetic effect between the electrode surface and catalyst. In this mini review, recent development in self-supported electrocatalysts for OER, HER and also bifunctional OER & HER are reviewed in terms of superior activity and robust stability. Material design strategies, structural and compositional properties, and catalytic performance of recently reported self-supported electrocatalysts are summarized. Finally, overview of recent studies, challenges and prospects related to self-supported electrocatalysts are discussed.

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An Intriguing Pea‐Like Nanostructure of Cobalt Phosphide on Molybdenum Carbide Incorporated Nitrogen‐Doped Carbon Nanosheets for Efficient Electrochemical Water Splitting

Cited by 57 publications

References 88 publications

Noble‐Metal‐Free Colloidal‐Copper Based Low Overpotential Water Oxidation Electrocatalyst

Noble‐Metal‐Free Colloidal‐Copper Based Low Overpotential Water Oxidation Electrocatalyst

Recent Advances in Transition Metal Carbide Electrocatalysts for Oxygen Evolution Reaction

Current Status of Self‐Supported Catalysts for Robust and Efficient Water Splitting for Commercial Electrolyzer

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