Self-supported tungsten/tungsten dioxide nanowires array as an efficient electrocatalyst in the hydrogen evolution reaction

Zhao, Yaoxing; Lv, Cuncai; Huang, Qingli; Huang, Zhipeng; Zhang, Chi

doi:10.1039/c6ra17194j

Cited by 10 publications

(4 citation statements)

References 40 publications

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“…Electrochemical impedance spectroscopic (EIS) measurements were performed to determine charge-transfer resistance ( R ct ) during the hydrogen evolution reaction. R ct largely corresponds to the HER kinetics at the electrode–electrolyte interface at low frequencies. , The Nyquist plots of the as-synthesized and the annealed samples are presented in Figures S10a and S10b, respectively. The plots exhibited two semicircles and were fit with a two-time constant model, and the equivalent circuit diagram is depicted in Figure S10c.…”

Section: Resultsmentioning

confidence: 99%

Engineering Molybdenum Diselenide and Its Reduced Graphene Oxide Hybrids for Efficient Electrocatalytic Hydrogen Evolution

Sarker

Peters

Chen

et al. 2018

ACS Appl. Nano Mater.

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We report the hydrogen evolution reaction (HER) with molybdenum diselenide (MoSe2) and its reduced graphene oxide (rGO) hybrids synthesized by a microwave process followed by annealing at 400 °C. The content of GO was varied to understand its role in the electrocatalytic activities. Electrochemical performance of the as-synthesized and the annealed catalysts underscores (i) a requirement of catalytic activation of the as-synthesized samples, (ii) an apparent shift in the onset potential as a result of annealing, and (iii) striking changes in the Tafel slope as well as the overpotential. The results clearly reveal that partially crystalline plain MoSe2 is more elctroactive in comparison to its annealed counterpart, whereas annealing is advantageous to MoSe2/rGO. Improved HER performances of the annealed MoSe2/rGO hydrids arise from the synergistic effect between active MoSe2 and rGO of improved conductivity. The annealed hybrid of MoSe2 with rGO designated as MoSe2/rGO100_400 °C demonstrated an excellent HER activity with a small onset potential of −46 mV vs reversible hydrogen electrode, a smaller Tafel slope (61 mV/dec), and a reduced overpotential of 186 mV at −10 mA/cm2. As a result of a convenient synthetic process and the suitable electrocatalytic performance, this study would be beneficial to designing and fabricating other nanomaterials with/without a conductive support for their versatile applications.

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Section: Resultsmentioning

confidence: 99%

Engineering Molybdenum Diselenide and Its Reduced Graphene Oxide Hybrids for Efficient Electrocatalytic Hydrogen Evolution

Sarker

Peters

Chen

et al. 2018

ACS Appl. Nano Mater.

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“…Through synergistic effect of components, the multi‐component catalysts are fabricated to overcome the instability of active components in the acid and alkaline electrolyte. For example, the tungsten/tungsten dioxide nanowires array on carbon paper (W/WO 2 NA@CP) provides an enhanced catalytic activity due to the fast electron transport from the carbon paper to W/WO 2 nanowires [121] . Through electrospinning method, the SiO 2 /WO 3 catalyst is endowed with enhanced interaction between SiO 2 and WO 3 , displaying 6.6 times HER activity than the bulk catalyst [122] .…”

Section: Design Principles For Tungsten Oxidementioning

confidence: 99%

“…For example, the tungsten/tungsten dioxide nanowires array on carbon paper (W/WO 2 NA@CP) provides an enhanced catalytic activity due to the fast electron transport from the carbon paper to W/ WO 2 nanowires. [121] Through electrospinning method, the SiO 2 / WO 3 catalyst is endowed with enhanced interaction between SiO 2 and WO 3 , displaying 6.6 times HER activity than the bulk catalyst. [122] Moreover, a unique string-like structure of NiWO 4 -WO 3 -WO 2.9 composite was developed, in which WO 2.9 plays a critical role in the electrocatalytic activity for HER.…”

Section: Multicomponent Catalysismentioning

confidence: 99%

Design Principles for Tungsten Oxide Electrocatalysts for Water Splitting

et al. 2021

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Electrocatalytic water splitting involving the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is a crucial and effective pathway to obtain clean and renewable energy resources. The advanced electrocatalysts can significantly reduce the reaction energy barrier to realize high‐efficiency energy conversion. In this regard, noble‐metal catalysts display excellent catalytic performance for the water splitting reaction, but the high cost hinders its large‐scale application. As a low‐cost candidate for noble‐metal catalysts, tungsten oxide is endowed with the variable crystalline phase and adjustable composition, which provide more opportunities to achieve satisfactory catalytic activity by engineering crystal structure and modulating surface electronic states. To promote the reaction activity and stability, some effective strategies have been developed to optimize the surface crystal and electronic structure of tungsten oxide electrocatalysts for overall water splitting. In this review, we especially highlight the latest advances and progress in the exploration of tungsten oxide electrocatalysts for HER and OER, and systematically classify these strategies into several design principles involving adjustable surface morphology, engineering defects, and synergistic catalysis, providing a deep understanding of the relationship between the catalytic activity and crystal structure in the tungsten oxide. Some perspectives are also proposed to guide a rational design of tungsten oxide electrocatalyst for water splitting.

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“…26 Zhang et al demonstrated that W/WO 2 NA@CP requires 297 mV hydrogen evolution over-potential to drive the current density of 10 mA cm −2 . 27 Xiao's group showed through theoretical simulations and experimental results that the incorporation of transition metal atoms including Fe, Co, Ni, and Cu can weaken the H interaction on M-W sites, consequently accelerating the HER process. 28 Inspired by this, we prepared self-supporting Ni-doped WO x for HER without additional dopant.…”

mentioning

confidence: 99%

Synthesis of Ni-WO_x at Different H⁺ Concentrations for Hydrogen Evolution Reaction

Wang¹,

Wang²,

Bai³

et al. 2022

ECS J. Solid State Sci. Technol.

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The development of efficient, durable, and inexpensive catalysts is a major challenge in achieving widespread application of hydrogen evolution reaction (HER). Herein, the Ni-WOx nanoparticles were prepared on nickel foam by hydrothermal and heat treatment. In particular, the nickel foam is not only used as a substrate, but also as a nickel source in an acidic environment to achieve the purpose of nickel doping. HCl is used to regulate the acidic environment, and its dosage will directly affect the phase and size of the material. By optimizing the usage of HCl, we demonstrate that the size of Ni-WOx nanoparticles decreased with the increase in HCl dosage. However, when the amount of HCl is too high, the nanoparticles will agglomerate and the crystalline phase of the material was also changed. When the usage of HCl is 300 µL, the optimized Ni-WOx has a smaller contact resistance and faster charge transfer rate, exhibiting excellent HER performance in alkaline media (the over-potentials is 96 mV at 20 mA cm-2 and outstanding durability over 10 h).

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Self-supported tungsten/tungsten dioxide nanowires array as an efficient electrocatalyst in the hydrogen evolution reaction

Abstract: A tungsten/tungsten dioxide nanowires array was constructed on a carbon paper through the thermal annealing of tungsten trioxide, and was proven to be an efficient hydrogen evolution cathode with strong durability in acidic solutions.

Cited by 10 publications

References 40 publications

Engineering Molybdenum Diselenide and Its Reduced Graphene Oxide Hybrids for Efficient Electrocatalytic Hydrogen Evolution

Engineering Molybdenum Diselenide and Its Reduced Graphene Oxide Hybrids for Efficient Electrocatalytic Hydrogen Evolution

Design Principles for Tungsten Oxide Electrocatalysts for Water Splitting

Synthesis of Ni-WO_x at Different H⁺ Concentrations for Hydrogen Evolution Reaction

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Self-supported tungsten/tungsten dioxide nanowires array as an efficient electrocatalyst in the hydrogen evolution reaction

Abstract: A tungsten/tungsten dioxide nanowires array was constructed on a carbon paper through the thermal annealing of tungsten trioxide, and was proven to be an efficient hydrogen evolution cathode with strong durability in acidic solutions.

Cited by 10 publications

References 40 publications

Engineering Molybdenum Diselenide and Its Reduced Graphene Oxide Hybrids for Efficient Electrocatalytic Hydrogen Evolution

Engineering Molybdenum Diselenide and Its Reduced Graphene Oxide Hybrids for Efficient Electrocatalytic Hydrogen Evolution

Design Principles for Tungsten Oxide Electrocatalysts for Water Splitting

Synthesis of Ni-WOx at Different H+ Concentrations for Hydrogen Evolution Reaction

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Synthesis of Ni-WO_x at Different H⁺ Concentrations for Hydrogen Evolution Reaction