Facile one-step electrodeposition preparation of porous NiMo film as electrocatalyst for hydrogen evolution reaction

Wang, Mingyong; Wang, Zhi; Yu, Xiangtao; Guo, Zhen

doi:10.1016/j.ijhydene.2014.12.022

Cited by 80 publications

(49 citation statements)

References 38 publications

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“…Interestingly, by forming alloys of two non-noble metals from the two branches of the volcano curve, it is possible www.advancedsciencenews.com to obtain catalysts with enhanced catalytic performances for HER. [14][15][16][17][18] For example, bimetallic nickel-molybdenum (NiMo) nanowires supported on nickel foams are capable to deliver current densities as comparable to those of the state-of-the-art Pt/C catalyst. [18] However, these metal-based non-precious catalysts are not suitable for applications in acidic conditions due to their poor stability.…”

Section: The Her Reactionmentioning

confidence: 99%

Hierarchical Nanostructures: Design for Sustainable Water Splitting

Fang

Dong

Wei

et al. 2017

Advanced Energy Materials

284

190

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Clean and sustainable hydrogen generation renders a magnificent prospect to fulfill the humans' dream of rebuilding energy supplying systems that work eternally and run without pollution. Water electrolysis driven by a renewable resource of energy, such as wind and solar, is a promising pathway to achieve this goal, which requires highly active and cost‐effective electrode materials to be developed. In this comprehensive review, we introduce the utilization of hierarchical nanostructures in electrocatalytic and photoelectrochemical applications. The unique emphasis is given on the synthetic strategies of attaining these hierarchical structures as well as to demonstrate their corresponding mechanisms for performance improvement. Rather than simply discussing all the methods that can be used in nanofabrication, we focus on extracting the rules for structural design based on highly accessible and reliable methods. Examples are given to illustrate the versatility of these methods in the synthesis and manipulation of hierarchical nanostructures, which are concentrated on nonprecious transition metals or their alloys/compounds. Through this study, we aim to establish valuable guidelines and provide further insights for researchers to facilitate their design of more efficient water splitting systems in the future.

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Section: The Her Reactionmentioning

confidence: 99%

Hierarchical Nanostructures: Design for Sustainable Water Splitting

Fang

Dong

Wei

et al. 2017

Advanced Energy Materials

284

190

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“…We fi nd that our catalyst electrode displays a similar or better performance than a majority of the other bifunctional catalysts deposited on a carbon-based current collector during operation in 0.1 M KOH aqueous solution (pH 13), as exemplifi ed by that it delivered a lower overpotential by >100 mV for both OER and HER in comparison to a NiCo 2 O 4 electrocatalyst deposited on glassy carbon current collector. [ 27,29,[57][58][59][60][61][62] There are however other catalyst materials deposited on metal-based current collectors (or operating at a higher pH) that feature a lower overpotential at the same drive current, but it is anticipated that such metal-based electrodes will carry a much higher price and larger weight than the carbon-based electrode used in our study. In this context, we also mention that the metal loading on our catalyst electrode is relatively low, and attribute its high catalytic activity to the large surface area of the NiCo 2 O 4 nanorods and the direct and stabile electronic transport paths between the nanorods and the CP current collector as facilitated by the N-CNTs.…”

Section: The Electrocatalyst Electrodementioning

confidence: 99%

Toward a Low‐Cost Artificial Leaf: Driving Carbon‐Based and Bifunctional Catalyst Electrodes with Solution‐Processed Perovskite Photovoltaics

Sharifi

Larsen

Wang

et al. 2016

Advanced Energy Materials

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countries, where many users still are not connected to the electric grid, it is clear that alternative energy technologies are needed that can contribute with renewable fuels in signifi cant amounts. In this challenging context, researchers have found inspiration in the process of natural photosynthesis when they attempt to convert the plentiful, but intermittent, solar irradiation incident on the Earth's surface into a storable fuel, using a range of methods commonly coined as artifi cial photosynthesis. [1][2][3][4][5][6][7][8][9] One emerging technology to achieve such solar-to-fuel conversion is the "artifi cial-leaf device", which essentially comprises an assembly of photovoltaics (PVs) that drives two electrocatalyst electrodes immersed in water. [10][11][12] This device produces molecular hydrogen and oxygen using only sunlight and water as the input, and during the past few years its performance has improved drastically, with the current record for the solar-to-hydrogen (STH) conversion efficiency being above 10%. [13][14][15][16] It is, however, clear that in order to become truly sustainable and useful, the artifi cial-leaf device should comprise solely, or predominantly, earth-abundant materials and be produced with scalable and low-cost methods. Moreover, from a processing and transport point of view, it is preferable if it can be lightweight and fl exible.Perovskite materials [ 14,[17][18][19][20][21] have recently emerged as an interesting option to incumbent silicon [ 15,20 ] and copperindium-gallium-selenide [ 16,20 ] for the active material in PVs, due to a high and quickly improving solar-to-electric (STE) conversion effi ciency and an opportunity for cost-effi cient, solutionbased fabrication. [ 17,18,21,23 ] The electrocatalyst electrode comprises a catalytically active material deposited on the surface of a current collector. Commonly employed materials for the current collector are bulk or porous metals, [ 15 ] whereas a popular choice for the catalyst is various types of metal-oxides. [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] From a system-cost and practicality perspective, it is desirable to develop a functional lightweight and low-cost current collector and to identify a catalyst that is bifunctional in that it can drive the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in the same water solution. [ 14,[39][40][41][42][43][44] Here, we present an artifi cial-leaf device that delivers an STH effi ciency of 6.2% and a Faradaic H 2 evolution effi ciency of 100%. We mention that our device is not fully integrated at this stage, Molecular hydrogen can be generated renewably by water splitting with an "artifi cial-leaf device", which essentially comprises two electrocatalyst electrodes immersed in water and powered by photovoltaics. Ideally, this device should operate effi ciently and be fabricated with cost-effi cient means using earth-abundant materials. Here, a lightweight electrocatalyst electrode, comprising large surface-area NiCo 2 O 4 nano...

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“…First, the prominently enhanced CeO 2 content in coating will provide more active sites for H ad during HER process. 12,20 It is known that the HER in alkaline solutions is predominated by three principal reactions, commonly named the Volmer, Heyrovsky and Tafel reactions. Finally, the thorough change of morphology may increase the catalytic surface area of the coating, leading to a sufficient contact between the electrode and the electrolyte.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

“…Though the HER intermediate product H atom can easily adsorb on Ce atom to form Ce-H ads due to the presence of half-lled and empty d orbitals. 23,36,43 The double layer capacitance C dl of the electrode is determined using the equation proposed by Brug et al: 12,13,44 Beneting from the supergravity elds, the HER catalytic activities of the Ni-CeO 2 composite coatings are enhanced prominently and most of the j 0 values are much higher than those ever reported in literature.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

“…Up to now, Ni and Ni-based electrode materials have been widely studied and considered as the most suitable candidates due to their high activity and good stability for HER in alkaline solutions, such as Ni-Mo, 11,12 Ni-Co, 13,14 Ni-W. 15,16 Recently, Nibased composite coatings containing active solid particles have also shown excellent electrocatalytic activity for HER and attracted more and more attention, such as Ni-MoO 3 , Ni-MoO 2 , 17,18 Ni-RuO 2 , 19 Ni-polyaniline 20 and Ni-rare earth (RE) compounds 21 composite electrodes. The embedded active solid particles in Ni matrix can signicantly facilitate the formation of nanocrystalline, the increase of the surface area of coating, and the enhancement of the intrinsic activity of materials.…”

Section: Introductionmentioning

confidence: 99%

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A novel approach for the preparation of Ni–CeO₂ composite cathodes with enhanced electrocatalytic activity

Chen

Song

et al. 2016

RSC Adv.

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In this work, supergravity fields were utilized to prepare Ni-CeO 2 composite cathodes from a nickel sulphamate bath containing suspended nano-sized CeO 2 particles. The prepared Ni-CeO 2 composite coatings exhibit a significant enhancement in electrocatalytic activity for the hydrogen evolution reaction (HER) in alkaline solutions. The crystal structure, morphology and chemical compositions of the composite coatings were characterized by XRD, SEM and EDS measurements. It was shown that the prepared Ni-CeO 2 composite coatings displayed a fine grain size and high contents of CeO 2 incorporated into the Ni matrix. The electrochemical activity of the composite cathodes for HER was determined by polarization measurements and electrochemical impedance spectroscopy in 1.0 M NaOH solution. The results indicate that the catalytic activity of the Ni-CeO 2 composite coatings is enhanced significantly, and the highest value of the exchange current density reaches 338.4 mA cm À2 , which is obviously higher than the values previously reported in the literature. Meanwhile, the effects of both the CeO 2 concentration and the intensities of the supergravity fields on the properties of the Ni-CeO 2 coatings are investigated.

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Facile one-step electrodeposition preparation of porous NiMo film as electrocatalyst for hydrogen evolution reaction

Cited by 80 publications

References 38 publications

Hierarchical Nanostructures: Design for Sustainable Water Splitting

Hierarchical Nanostructures: Design for Sustainable Water Splitting

Toward a Low‐Cost Artificial Leaf: Driving Carbon‐Based and Bifunctional Catalyst Electrodes with Solution‐Processed Perovskite Photovoltaics

A novel approach for the preparation of Ni–CeO₂ composite cathodes with enhanced electrocatalytic activity

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Facile one-step electrodeposition preparation of porous NiMo film as electrocatalyst for hydrogen evolution reaction

Cited by 80 publications

References 38 publications

Hierarchical Nanostructures: Design for Sustainable Water Splitting

Hierarchical Nanostructures: Design for Sustainable Water Splitting

Toward a Low‐Cost Artificial Leaf: Driving Carbon‐Based and Bifunctional Catalyst Electrodes with Solution‐Processed Perovskite Photovoltaics

A novel approach for the preparation of Ni–CeO2 composite cathodes with enhanced electrocatalytic activity

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Product

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A novel approach for the preparation of Ni–CeO₂ composite cathodes with enhanced electrocatalytic activity