Tungsten nitride nanorods array grown on carbon cloth as an efficient hydrogen evolution cathode at all pH values

Shi, Jinle; Pu, Zonghua; Liu, Qian; Asiri, Abdullah M.; Hu, Jie; Sun, Xuping

doi:10.1016/j.electacta.2014.12.096

Cited by 116 publications

(64 citation statements)

References 35 publications

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“…In addition, the NF-120 exhibits remarkably high activity with an onset potential of~73 mV and an overpotential of 160 mV vs. RHE at the current density of 10 mA cm −2 (NF-60, NF-90 and the bare NF display overpotentials of 195, 176 and 288 mV, respectively). This overpotential is comparable to or even smaller than those of many reported values for non-Pt HER catalysts in basic aqueous media, including CoNRCNTs (370 mV) [40], MoB (225 mV) [41], WP (250 mV) [28], porous Co-based film (375 mV) [42], MoP (276 mV) [43], and WN NAs/CC (285 mV) [44], (see Fig. 4b and Table S1 in the Supplementary information for more details).…”

Section: Resultsmentioning

confidence: 85%

Acid promoted Ni/NiO monolithic electrode for overall water splitting in alkaline medium

Hou

et al. 2017

Sci. China Mater.

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Exploring and designing bi-functional catalysts with earth-abundant elements that can work well for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline medium are of significance for producing clean fuel to relieve energy and environment crisis. Here, a novel Ni/NiO monolithic electrode was developed by a facile and cost-effective acid promoted activation of Ni foam. After the treatment, this obtained monolithic electrode with a layer of NiO on its surface demonstrates rough and sheet-like morphology, which not only possesses larger accessible surface area but also provides more reactive active sites. Compared with powder catalysts, this monolithic electrode can achieve intimate contact between the electrocatalyst and the current collector, which will alleviate the problem of pulverization and enable the stable function of the electrode. It can be served as an efficient bi-functional electrocatalyst with an overpotential of 160 mV for HER and 290 mV for OER to produce current densities of 10 mA cm −2 in the alkaline medium. And it maintains benign stability after 5,000 cycles, which rivals many recent reported noble-metal free catalysts in 1.0 mol L −1 KOH solution. Attributed to the easy, scalable methodology and high catalytic efficiency, this work not only offers a promising monolithic catalyst but also inspires us to exploit other inexpensive, highly efficient and self-standing noble metalfree electrocatalysts for scale-up electrochemical water-splitting technology.

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Section: Resultsmentioning

confidence: 85%

Acid promoted Ni/NiO monolithic electrode for overall water splitting in alkaline medium

Hou

et al. 2017

Sci. China Mater.

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“…The WN/CC was fabricated according to our recent report [20]. The diffraction peaks at around 37.7, 43.8, 63.7, and 76.4 Correspond to (111), (200), (220), and (311) planes of the WN phase (JCPDS No.…”

Section: Resultsmentioning

confidence: 99%

“…All electrochemical studies were performed according to our previous reported methods [20][21][22] using a CHI660E workstation (CH Instruments, China). Freshly prepared Ni-WN/CC was directly used as working electrodes.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

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Self-standing Ni-WN heterostructure nanowires array: A highly efficient catalytic cathode for hydrogen evolution reaction in alkaline solution

Xing

Wang

et al. 2016

Electrochimica Acta

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“…[3][4][5] It is therefore necessary to search for earth-abundant, cost-effective, and efficient alternatives for HER. In recent years, a wide range of non-Pt catalysts including oxides, [6] sulfides, [7][8][9][10][11] borides, [12][13][14] phosphides, [15][16][17][18][19][20][21][22][23] nitrides, [24][25][26] carbides, [12,[27][28][29][30][31][32][33] nanocarbons, [34][35][36][37] and their composites [38][39][40][41] have been extensively developed to catalyze HER. Among these options, molybdenumbased materials are the attractive ones due to their low cost and good performance.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Mo₂C Nanocrystals Embedded in Nanoporous Carbon Network for Efficient Hydrogen Evolution

Chen

Zhang

et al. 2017

Chin. J. Chem.

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Exploring facile and easily-scalable methods for synthesizing earth-abundant, cost-effective and efficient hydrogen evolution reaction (HER) electrocatalysts is essential for the mass production of hydrogen as a clean and sustainable energy carrier. We report here a simple strategy to produce Mo 2 C nanocrystals embedded in carbon network (Mo 2 C@C) by the direct pyrolysis of ammonium molybdate and polyvinylpyrrolidone (PVP). It is found that PVP can be effectively used as a single source to form carbides and carbon network. The long polymer chain and coordinating capability with transition metal of PVP make it possible to form connected porous carbon network and well-dispersed Mo 2 C nanocrystals in several nanometers. The carbonization of PVP not only effectively in-situ prevents the aggregation of Mo 2 C nanocrystals during their formation, but also provides conductive porous matrix. As a result, the Mo 2 C@C composite exhibits the superior electrocatalytic performance for HER, which can be ascribed to the large number of active sites from plenty of small Mo 2 C nanocrystals and the efficient mass and electron transport network from carbon matrix. This strategy may inspire the exploration of cost-effective functional polymer as single source for both carbon precursor and nanostructure-directed reagent to mass-produce well-defined metal carbides nanostructures embedded in porous carbon network for energy applications.

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Tungsten nitride nanorods array grown on carbon cloth as an efficient hydrogen evolution cathode at all pH values

Cited by 116 publications

References 35 publications

Acid promoted Ni/NiO monolithic electrode for overall water splitting in alkaline medium

Acid promoted Ni/NiO monolithic electrode for overall water splitting in alkaline medium

Self-standing Ni-WN heterostructure nanowires array: A highly efficient catalytic cathode for hydrogen evolution reaction in alkaline solution

Facile Synthesis of Mo₂C Nanocrystals Embedded in Nanoporous Carbon Network for Efficient Hydrogen Evolution

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Tungsten nitride nanorods array grown on carbon cloth as an efficient hydrogen evolution cathode at all pH values

Cited by 116 publications

References 35 publications

Acid promoted Ni/NiO monolithic electrode for overall water splitting in alkaline medium

Acid promoted Ni/NiO monolithic electrode for overall water splitting in alkaline medium

Self-standing Ni-WN heterostructure nanowires array: A highly efficient catalytic cathode for hydrogen evolution reaction in alkaline solution

Facile Synthesis of Mo2C Nanocrystals Embedded in Nanoporous Carbon Network for Efficient Hydrogen Evolution

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Facile Synthesis of Mo₂C Nanocrystals Embedded in Nanoporous Carbon Network for Efficient Hydrogen Evolution