Influence of the NaOH Concentration on the Hydrogen Electrode Reaction Kinetics of Ni and NiCu Electrodes | Sciact - CRIS-система Института катализа

Influence of the NaOH Concentration on the Hydrogen Electrode Reaction Kinetics of Ni and NiCu Electrodes Научная публикация

Журнал

ChemElectroChem
ISSN: 2196-0216

Вых. Данные

Год: 2020, Том: 7, Номер: 6, Страницы: 1438-1447 Страниц : 10 DOI: 10.1002/celc.202000319

Ключевые слова

electron transfer theory; hydrogen electrocatalysis; Ni and NiCu catalysts; pH effect; sodium hydroxide

Авторы

Kuznetsov Aleksey N. ^1,2 , Oshchepkov Alexandr G. ¹ , Cherstiouk Olga V. ^1,2 , Simonov Pavel A. ^1,2 , Nazmutdinov Renat R. ³ , Savinova Elena R. ⁴ , Bonnefont Antoine ⁵

Организации

1	Boreskov Institute of Catalysis, Novosibirsk, 630090 Russia
2	Novosibirsk State University, Novosibirsk, 630090 Russia
3	Kazan National Research Technological University, 420015 Kazan, Russia
4	Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé, UMR 7515 CNRS-University of Strasbourg, 67087 Strasbourg Cedex, France
5	Institut de Chimie de Strasbourg, UMR 7177 CNRS-University of Strasbourg, 67070 Strasbourg, France

Информация о финансировании (1)

Российский фонд фундаментальных исследований

17-53-150008

Nickel is a promising electrocatalyst for hydrogen electrode reactions in alkaline media. Its electrocatalytic activity for hydrogen oxidation and evolution reactions can be enhanced when its surface is partially covered by Ni (hydr)oxides or by associating it with Cu. In this work, the influence of the NaOH concentration on the hydrogen electrode kinetics on various Ni electrodes is investigated. On metallic Ni, the electrocatalytic activity (measured as an exchange current density normalized to the surface area of Ni) is almost constant between pH 12 and 14, whereas it decreases by a factor of two on partially oxidized Ni and on the NiCu/C electrode. Analyzing the current potential curves with the help of microkinetic modeling reveals that the Had and OHad binding energies on Ni do not depend on pH, whereas the rate constants of the Volmer and Heyrovsky reactions decrease with pH. The pH effect on the electron transfer elementary act is briefly discussed in the framework of a quantum mechanical theory.

Kuznetsov A.N. , Oshchepkov A.G. , Cherstiouk O.V. , Simonov P.A. , Nazmutdinov R.R. , Savinova E.R. , Bonnefont A.
Influence of the NaOH Concentration on the Hydrogen Electrode Reaction Kinetics of Ni and NiCu Electrodes
ChemElectroChem. 2020. V.7. N6. P.1438-1447. DOI: 10.1002/celc.202000319 WOS Scopus РИНЦ CAPlus OpenAlex

Поступила в редакцию:	27 февр. 2020 г.
Опубликована online:	8 мар. 2020 г.
Опубликована в печати:	16 мар. 2020 г.

Web of science:	WOS:000522359100013
Scopus:	2-s2.0-85082884937
РИНЦ:	43259503
Chemical Abstracts:	2020:606117
OpenAlex:	W3009928902

БД	Цитирований
Web of science	14
Scopus	13
РИНЦ	10
OpenAlex	14