Bimetallic NiM/C (M = Cu and Mo) Catalysts for the Hydrogen Oxidation Reaction: Deciphering the Role of Unintentional Surface Oxides in the Activity Enhancement | Sciact - CRIS-system of Boreskov Institute of Catalysis

Bimetallic NiM/C (M = Cu and Mo) Catalysts for the Hydrogen Oxidation Reaction: Deciphering the Role of Unintentional Surface Oxides in the Activity Enhancement Full article

Journal

ACS Catalysis
ISSN: 2155-5435

Output data

Year: 2022, Volume: 12, Pages: 15341−15351 Pages count : 11 DOI: 10.1021/acscatal.2c03720

Tags

hydrogen oxidation reaction (HOR), nickel, nickel oxide, copper, molybdenum, density functional theory, Monte Carlo simulations, in situ reduction

Authors

Oshchepkov Alexandr G. ^1,2,3 , Simonov Pavel A. ^1,2 , Kuznetsov Aleksey N. ^1,2 , Shermukhamedov Shokir A. ^4,5 , Nazmutdinov Renat R. ⁴ , Kvon Ren I. ¹ , Zaikovskii Vladimir I. ^1,2 , Kardash Tatyana Yu. ^1,2 , Fedorova Elizaveta A. ^1,6 , Cherstiouk Olga V. ^1,2 , Bonnefont Antoine ⁷ , Savinova Elena R. ³

Affiliations

1	Boreskov Institute of Catalysis, Lavrentiev Avenue 5, Novosibirsk 630090, Russia
2	Novosibirsk State University, Novosibirsk 630090, Russia
3	Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé, UMR 7515 CNRS-University of Strasbourg, 25 rue Becquerel, Strasbourg Cedex, 67087, France (A.G.O)
4	Kazan National Research Technological University, Kazan 420015, Russia
5	Institute of Ion Physics and Applied Physics, University of Innsbruck, Innsbruck 6020, Austria
6	Leibniz Institute for Catalysis, Albert-Einstein-Str. 29a, 18059 Rostock, Germany (E.A.F.)
7	Institut de Chimie de Strasbourg, UMR 7177 CNRS-University of Strasbourg, 4 rue Blaise Pascal, Strasbourg 67070, France

Funding (1)

Russian Foundation for Basic Research

20-03-00772

Emerging interest in the platinum group metal (PGM)-free electrocatalysts calls for a fundamental understanding of the key factors determining their activity, the latter being critical for the development of efficient catalysts. Ni-based materials show high promises as PGM-free anodes of anion exchange membrane fuel cells (AEMFCs). However, their hydrogen oxidation reaction (HOR) activity can differ by several orders of magnitude, and the factors responsible for this are still being debated. In this work, the effect of unintentional surface oxides in Ni/C and NiM/C (M = Cu and Mo) is revealed by benchmarking either the catalysts conventionally stored under ambient conditions or purposely reduced “oxide-free” materials. The analysis of electrocatalytic data complemented by detailed material characterization, Monte Carlo simulations, and density functional calculations, underlines the key importance of surface oxides in the HOR catalysis on Ni, NiCu, and NiMo electrodes. These findings underscore the need to measure the HOR activity of Ni-based catalysts in the absence of surface oxides in order to unambiguously interpret the influence of other factors (such as the electronic effect of the second element) on activity enhancement.

Oshchepkov A.G. , Simonov P.A. , Kuznetsov A.N. , Shermukhamedov S.A. , Nazmutdinov R.R. , Kvon R.I. , Zaikovskii V.I. , Kardash T.Y. , Fedorova E.A. , Cherstiouk O.V. , Bonnefont A. , Savinova E.R.
Bimetallic NiM/C (M = Cu and Mo) Catalysts for the Hydrogen Oxidation Reaction: Deciphering the Role of Unintentional Surface Oxides in the Activity Enhancement
ACS Catalysis. 2022. V.12. P.15341−15351. DOI: 10.1021/acscatal.2c03720 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Jul 29, 2022
Accepted:	Nov 4, 2022
Published online:	Nov 30, 2022
Published print:	Dec 16, 2022

Web of science:	WOS:000891668800001
Scopus:	2-s2.0-85143412148
Elibrary:	53768891
Chemical Abstracts:	2022:2983236
OpenAlex:	W4310433399

DB	Citing
Web of science	9
Scopus	10
Elibrary	5
OpenAlex	6