Kinetics of hydrogen evolution reaction in alkaline electrolysis on a Ni cathode in the presence of Ni–Co–Mo based ionic activators

Nikolić, Vladimir M.; Maslovara, Sladjana Lj.; Tasić, Gvozden S.; Brdarić, Tanja P.; Lausevic, Petar Z.; Radak, B.; Kaninski, Milica P. Marčeta

doi:10.1016/j.apcatb.2015.05.012

Cited by 129 publications

(70 citation statements)

References 24 publications

(36 reference statements)

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“…As shown in Fig. 6(a), the overpotential on a Ni substrate at a current density of 10 mA/cm 2 is 293 mV, which matches to the literature data [11]. In the case of g-C 3 N 4 and g-C 3 N 4 /MgO nanocomposite, the overpotential value at the same current density is 264 and 251 mV, respectively.…”

Section: Resultssupporting

confidence: 86%

The effect of MgO additive on the g-C3N4 performance in electrochemical reforming of water-ethanol solution

Chebanenko¹,

Martinson²,

Мацукевич³

et al. 2020

Nanosystems: Phys. Chem. Math.

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In this work, a simple wet-chemical route was proposed to synthesize g-C 3 N 4 /MgO (5% wt.) with enhanced electrocatalytic activity toward hydrogen evolution from water-ethanol (10% vol.) solution. It was found that synthesized nanocomposite is a single phase and chemically pure, consisting of graphitic carbon nitride (g-C 3 N 4) and cubic magnesium oxide (MgO, periclase) with an average crystallite size of 15.5 nm and 9.5 nm, respectively. It was shown that magnesia nanoparticles are evenly distributed on the surface of g-C 3 N 4 nanosheets and uniform distribution of components is observed over the nanocomposite volume. It was found that this feature leads to an improvement in the electrocatalytic characteristics of the synthesized nanocomposite. So, the g-C 3 N 4 /MgO-coated electrode has an overpotential of −251 mV, which is better than for a g-C 3 N 4coated (−264 mV) or pure nickel (−293 mV) electrode. Moreover, the nanocomposite-based electrode posses a low Tafel slope (−106.7 mV/dec) and high cyclic and chronopotentiometry stability.

show abstract

Section: Resultssupporting

confidence: 86%

The effect of MgO additive on the g-C3N4 performance in electrochemical reforming of water-ethanol solution

Chebanenko¹,

Martinson²,

Мацукевич³

et al. 2020

Nanosystems: Phys. Chem. Math.

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show abstract

“…Figure 1 d shows the result of EIS conducted at −0.04 V RHE . The equivalent electric circuit used to fit the experimental admittance spectra is presented in Figure S10 [11] . Interestingly, we observed two semicircles in both the alkaline and acid media, validating the availability of the kinetics information, by significantly lowering the catalyst loadings on the electrodes (≈0.5 ug Pt cm −2 ) [12] .…”

Section: Figuresupporting

confidence: 59%

Interfacial Structure of Water as a New Descriptor of the Hydrogen Evolution Reaction

Shen

et al. 2020

Angewandte Chemie

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Driven by the persisting poor understanding of the sluggish kinetics of the hydrogen evolution reaction (HER) on Pt in alkaline media, a direct correlation of the interfacial water structure and activity is still yet to be established. Herein, using Pt and Pt–Ni nanoparticles we first demonstrate a strong dependence of the proton donor structure on the HER activity and pH. The structure of the first layer changes from the proton acceptors to the donors with increasing pH. In the base, the reactivity of the interfacial water varied its structure, and the activation energies of water dissociation increased in the sequence: the dangling O−H bonds < the trihedrally coordinated water < the tetrahedrally coordinated water. Moreover, optimizing the adsorption of H and OH intermediates can re‐orientate the interfacial water molecules with their H atoms pointing towards the electrode surface, thereby enhancing the kinetics of HER. Our results clarified the dynamic role of the water structure at the electrode–electrolyte interface during HER and the design of highly efficient HER catalysts.

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“…As shown in Fig. 4d, the Armstrong equivalent circuit model is used for fitting EIS data [45]. The charge-transfer resistance (R ct ) is determined from the diameter of semicircle at high-frequency region in Nyquist plots.…”

Section: Resultsmentioning

confidence: 99%

Robust and stable ruthenium alloy electrocatalysts for hydrogen evolution by seawater splitting

Niu

Tang

et al. 2016

Electrochimica Acta

103

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Kinetics of hydrogen evolution reaction in alkaline electrolysis on a Ni cathode in the presence of Ni–Co–Mo based ionic activators

Cited by 129 publications

References 24 publications

The effect of MgO additive on the g-C3N4 performance in electrochemical reforming of water-ethanol solution

The effect of MgO additive on the g-C3N4 performance in electrochemical reforming of water-ethanol solution

Interfacial Structure of Water as a New Descriptor of the Hydrogen Evolution Reaction

Robust and stable ruthenium alloy electrocatalysts for hydrogen evolution by seawater splitting

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