scholarly journals On the kinetics of the hydrogen evolution reaction on zinc in sulfate solutions

2001 ◽  
Vol 66 (11-12) ◽  
pp. 811-823 ◽  
Author(s):  
T. Trisovic ◽  
Lj. Gajic-Krstajic ◽  
N. Krstajic ◽  
M. Vojnovic
Keyword(s):  
Reaction Mechanism ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Electrochemical Impedance ◽  
Active Role ◽  
Potential Region ◽  
Sulfate Solutions ◽  
Ph Range ◽  
Kinetics Of

The kinetics and mechanism of the hydrogen evolution reaction (her) were studied on zinc in 1.0 mol dm-3 Na2SO4 at 298 K, in the pH range 4.4 - 10. It was found that a combination of classical potentiostatic steady-state voltammetry (PSV) and electrochemical impedance spectroscopy (EIS) can help to elucidate dilemmas concerning the mechanism of this reaction. Thus, over the whole potential region, the reaction path of the her on zinc cannot be presented by the classical Volmer-Tafel-Heyrovsky route. It was found that the very complex S-shape of the polarization curves could be explained by two parallel reaction mechanisms for the her. The first reaction mechanism is a consecutive combination of three steps, in which the surface zinc oxide plays an active role in the her, and second reaction mechanism is a consecutive combination of a Volmer step, followed by a Heyrovsky step. The second mechanism is dominant in the more negative potential region where the active sites for the her are metallic zinc.

scholarly journals Defect-Rich Heterogeneous MoS2/rGO/NiS Nanocomposite for Efficient pH-Universal Hydrogen Evolution

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 662 ◽  
Author(s):  
Guangsheng Liu ◽  
Kunyapat Thummavichai ◽  
Xuefeng Lv ◽  
Wenting Chen ◽  
Tingjun Lin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Reduced Graphene ◽  
Heterogeneous Interfaces ◽  
Wide Ph Range ◽  
Ph Range ◽  
A Current ◽  
Poor Stability

Molybdenum disulfide (MoS2) has been universally demonstrated to be an effective electrocatalytic catalyst for hydrogen evolution reaction (HER). However, the low conductivity, few active sites and poor stability of MoS2-based electrocatalysts hinder its hydrogen evolution performance in a wide pH range. The introduction of other metal phases and carbon materials can create rich interfaces and defects to enhance the activity and stability of the catalyst. Herein, a new defect-rich heterogeneous ternary nanocomposite consisted of MoS2, NiS and reduced graphene oxide (rGO) are synthesized using ultrathin αNi(OH)2 nanowires as the nickel source. The MoS2/rGO/NiS-5 of optimal formulation in 0.5 M H2SO4, 1.0 M KOH and 1.0 M PBS only requires 152, 169 and 209 mV of overpotential to achieve a current density of 10 mA cm−2 (denoted as η10), respectively. The excellent HER performance of the MoS2/rGO/NiS-5 electrocatalyst can be ascribed to the synergistic effect of abundant heterogeneous interfaces in MoS2/rGO/NiS, expanded interlayer spacings, and the addition of high conductivity graphene oxide. The method reported here can provide a new idea for catalyst with Ni-Mo heterojunction, pH-universal and inexpensive hydrogen evolution reaction electrocatalyst.

scholarly journals КИНЕТИКА КАТОДНОГО ВЫДЕЛЕНИЯ ВОДОРОДА НА МОНОСИЛИЦИДЕ МАРГАНЦА В СЕРНОКИСЛОМ ЭЛЕКТРОЛИТЕ

2019 ◽  
Vol 21 (3) ◽  
pp. 432-440
Author(s):  
Viktoria V. Panteleeva ◽  
Ilya S. Votinov ◽  
Igor S. Polkovnikov ◽  
Anatoliy В. Shein
Keyword(s):  
New York ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrochemical Impedance ◽  
Hydrogen Energy ◽  
Acidic Solutions ◽  
Kinetics Of ◽  
Theoretical Electrochemistry

Методами поляризационных и импедансных измерений изучена кинетика реакции выделения водорода на MnSi-электроде в сернокислых растворах с различной концентрацией ионов водорода. Сделано предположение о механизме выделения водорода на силициде. Отмечено влияние тонкой оксидной пленки на кинетику выделения водорода на MnSi при невысоких катодных поляризациях.       REFERENCES Rotinyan A. L., Tikhonov K. I., Shoshina I. A. Teoreticheskaya elektrokhimiya [Theoretical Electrochemistry]. Leningrad, Khimiya Publ., 1981, 424 p. (in Russ.) Antropov L. I. Teoreticheskaya elektrokhimiya [Theoretical Electrochemistry]. Мoscow, Vysshaya shkola Publ., 1984, 519 p. (in Russ.) Shamsul Huq A. K. M., Rosenberg A. J. J. Electrochemical behavior of nickel compounds. Electrochem. Soc. , 1964, v. 111(3), p. 270. https://doi.org/10.1149/1.2426107 Vijh A. K., Belanger G., Jacques R. Electrochemical reactions oh iron silicide surfaces in sulphuric acid. Materials Chemistry and Physics, 1988, v. 20(6), pp. 529–538. https://doi.org/10.1016/0254-0584(88)90086-7 Vijh A. K., Belanger G., Jacques R. Electrochemical activity of silicides of some transition metals for the hydrogen evolution reaction in acidic solutions. Int. J. Hydrogen Energy, 1990, v. 15(11), pp. 789–794. DOI: 10.1016/0360-3199(90)90014-P Shein A. B. Elektrokhimiya silitsidov i germanidov perekhodnykh metallov [Electrochemistry of silicides and germanides of transition metals]. Perm‘, Perm. gos. un-t Publ., 2009, 269 p. (in Russ.) Vigdorovich V. I., Tsygankova L. E., Gladysheva I. E., Kichigin V. I. Kinetics of hydrogen evolution from acidic solutions on pressed micro graphite electrodes modifi ed with carbon nanotubes. II. Impedance studies. Protection of Metals and Physical Chemistry of Surfaces, 2012, v. 48(4), pp. 438–443. https://doi.org/10.1134/S2070205112040181 Meyer S., Nikiforov A. V., Petrushina I. M., Kohler K., Christensen E., Jensen J. O., Bjerrum N. J. Transition metal carbides (WC, Mo2C, TaC, NbC) as potential electrocatalysts for the hydrogen evolution reaction (HER) at medium temperatures. Int. J. Hydrogen Energy, 2015, v. 40(7), pp. 2905–2911. https://doi.org/10.1016/j.ijhydene.2014.12.076 Kichigin V. I., Shein A. B., Shamsutdinov A. Sh. The kinetics of cathodic hydrogen evolution on iron monosilicide in acid and alkaline solutions. Kondensirovannye sredy i mezhfaznye granitsy [Condensed Matter and Interphases], 2016, v. 18(3), pp. 326–337. URL: https://journals.vsu.ru/kcmf/article/view/140/98 (in Russ.) Eftekhari A. Electrocatalysts for hydrogen evolution reaction. International Journal of Hydrogen Energy, 2017, v. 42(16), pp. 11053–11077. https://doi.org/10.1016/j.ijhydene.2017.02.125 Schalenbach M., Speck F. D., Ledendecker M., Kasian O., Goehl D., Mingers A. M., Breitbach B., Springer H., Cherevko S., Mayrhofer K. J. J. Nickelmolybdenum alloy catalysts for the hydrogen evolution reaction: Activity and stability revised. Electrochimica Acta, 2018, v. 259, pp. 1154–1161. https://doi.org/10.1016/j.electacta.2017.11.069 Kuz’minykh M. M., Panteleeva V. V., Shein A. B. Cathodic hydrogen evolution on iron disilicide. II. Acidic solution. Izvestiya vuzov. Khimiya i khim. tekhnologiya, 2019, v. 62(2), pp. 59–64. https://doi.org/10.6060/ivkkt. 20196202.5750 (in Russ.) Samsonov G. V., Dvorina L. A., Rud’ B.M. Silitsidy [Silicides]. Moscow, Metallurgiya Publ., 1979, 272 p. (in Russ.) Samsonov G. V., Vinitskii I. M. Tugoplavkie soedineniya [Refractory compounds]. Moscow, Metallurgiya Publ., 1976, 560 p. (in Russ.) Yamasaki T., Okada S., Kamamoto K., Kudou K. Crystal Growth and properties of manganese-silicon system compounds by high-temperature tin solution method. Pacific Science Review, 2012, v. 14(3), pp. 275. Lee M., Onose Y., Tokura Y., Ong N. P. Hidden constant in the anomalous Hall effect of high-purity magnet MnSi. Phys. Rev. B., 2007, v. 75(17), p. 172403. https://doi.org/10.1103/PhysRevB.75.172403 Neubauer A., Pfl eiderer C., Binz B., Rosch A., Ritz R., Niklowitz P. G., Boni P. Topological Hall effect in the a phase of MnSi. Phys. Rev. Lett., 2009, v. 102(18), pp. 186602. https://doi.org/10.1103/PhysRevLett.102.186602 Sukhotin A. M. Spravochnik po elektrokhimii [Handbook of electrochemistry]. Leningrad, Khimiya Publ., 1981, 488 p. (in Russ.) Zhang X. G. Electrochemistry of silicon and its oxide. Kluwer Academic/Plenum Publishers, New York, 2001. 510 p. Xu X., Bojkov H., Goodman D. W. Electrochemical study of ultrathin silica fi lms supported on a platinum substrate. J. Vac. Sci. Technol., 1994, v. A12(4), pp. 1882–1885. https://doi.org/10.1116/1.579022 Harrington D. A., Conway B. E. ac Impedance of Faradaic reactions involving electrosorbed intermediates — I. Kinetic theory. Electrochim. Acta, v. 32(12), pp. 1703–1712. https://doi.org/10.1016/0013-4686(87)80005-1 Orazem M. E., Tribollet B. Electrochemical Impedance Spectroscopy. J. Wiley and Sons, Hoboken, New York, 2008, 533 p. Kichigin V. I., Sherstobitova I. N., Shein A. B. Impedans elektrokhimicheskikh i korrozionnykh sistem: ucheb. posobie po spetskursu [The impedance of electrochemical and corrosion systems: textbook. special course allowance]. Perm’, Perm. gos. un-t Publ., 2009, 239 p. (in Russ.) Kichigin V. I., Shein A. B. Diagnostic criteria for hydrogen evolution mechanisms in electrochemical impedance spectroscopy. Electrochemica Acta, 2014, v. 138, pp. 325–333. https://doi.org/10.1016/j.electacta.2014.06.114 Kichigin V. I., Shein A. B. Additional criteria for the mechanism of hydrogen evolution reaction in the impedance spectroscopy method. Vestnik Permskogo Universiteta. Ser. Khimiya, 2018, v. 8, iss. 3, pp. 316–324. https://doi.org/10.17072/2223-1838-2018-3-316-324 (in Russ.) Kichigin V. I., Shein A. B. Infl uence of hydrogen absorption on the potential dependence of the Faradaic impedance parameters of hydrogen evolution reaction. Electrochemica Acta, 2016, v. 201, pp. 233–239. https://doi.org/10.1016/j.electacta.2016.03.194

The Hydrogen Evolution Reaction on Fe Electrode Material in 1 M NaOH Solution

2015 ◽  
Vol 228 ◽  
pp. 252-257 ◽  
Author(s):  
Magdalena Popczyk ◽  
B. Łosiewicz
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrode Material ◽  
Electrochemical Impedance ◽  
Porous Electrodes ◽  
Iron Electrode ◽  
Iron Corrosion ◽  
Naoh Solution ◽  
Eis Measurements ◽  
Kinetics Of

Kinetics of hydrogen evolution reaction (HER) was investigated in 1 M NaOH solution at room temperature on a polycrystalline Fe electrode material which was electrochemically activated and unactivated. Studies of the HER were carried out using steady-state polarization and electrochemical impedance spectroscopy (EIS) measurements. It was found that for the Fe electrode material after activation atj= -320 mA cm-2for 24 h, the increase in the catalytic activity towards the HER was observed in comparison with that on the unactivated iron electrode material.Acimpedance behavior of the Fe electrode changed from a typical for smooth electrodes before activation (one time constant in the circuit) to that being characteristic for porous electrodes after activation (two time constants in the circuit). The reason for that is formation of solid products of the iron corrosion in alkaline solution which can cause passivation of the electrode surface and catalyse the HER.

scholarly journals A monodispersed CuPt alloy: synthesis and its superior catalytic performance in the hydrogen evolution reaction over a full pH range

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12470-12475
Author(s):  
Xinmei Liu ◽  
Chen Liang ◽  
Wenlong Yang ◽  
Chunyang Yang ◽  
Jiaqi Lin ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
High Stability ◽  
Low Cost ◽  
Catalytic Performance ◽  
Ph Range

An effective approach to achieve the low cost and high stability of electro-catalysts for HER.

scholarly journals Engineering single-atomic ruthenium catalytic sites on defective nickel-iron layered double hydroxide for overall water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Panlong Zhai ◽  
Mingyue Xia ◽  
Yunzhen Wu ◽  
Guanghui Zhang ◽  
Junfeng Gao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Layered Double Hydroxide ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Density Functional ◽  
Rational Design ◽  
Single Atom ◽  
Nickel Iron ◽  
Double Hydroxide

AbstractRational design of single atom catalyst is critical for efficient sustainable energy conversion. However, the atomic-level control of active sites is essential for electrocatalytic materials in alkaline electrolyte. Moreover, well-defined surface structures lead to in-depth understanding of catalytic mechanisms. Herein, we report a single-atomic-site ruthenium stabilized on defective nickel-iron layered double hydroxide nanosheets (Ru1/D-NiFe LDH). Under precise regulation of local coordination environments of catalytically active sites and the existence of the defects, Ru1/D-NiFe LDH delivers an ultralow overpotential of 18 mV at 10 mA cm−2 for hydrogen evolution reaction, surpassing the commercial Pt/C catalyst. Density functional theory calculations reveal that Ru1/D-NiFe LDH optimizes the adsorption energies of intermediates for hydrogen evolution reaction and promotes the O–O coupling at a Ru–O active site for oxygen evolution reaction. The Ru1/D-NiFe LDH as an ideal model reveals superior water splitting performance with potential for the development of promising water-alkali electrocatalysts.

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