Efficient Hydrogen Oxidation Catalyzed by Strain-Engineered Nickel Nanoparticles
Journal
Angewandte Chemie - International Edition
Journal Volume
59
Journal Issue
27
Pages
10797-10801
Date Issued
2020
Author(s)
Abstract
The hydroxide-exchange membrane fuel cell (HEMFC) is a promising energy conversion device. However, the development of HEMFC is hampered by the lack of platinum-group-metal-free (PGM-free) electrocatalysts for the hydrogen oxidation reaction (HOR). Now, a Ni catalyst is reported that exhibits the highest mass activity in HOR for a PGM-free catalyst as well as excellent activity in the hydrogen evolution reaction (HER). This catalyst, Ni-H2-2 %, was optimized through pyrolysis of a Ni-containing metal-organic framework precursor under a mixed N2/H2 atmosphere, which yielded carbon-supported Ni nanoparticles with different levels of strains. The Ni-H2-2 % catalyst has an optimal level of strain, which leads to an optimal hydrogen binding energy and a high number of active sites. ? 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Subjects
Binding energy; Binding sites; Catalyst activity; Electrocatalysts; Energy conversion; Fuel cells; Hydrogen evolution reaction; Metal-Organic Frameworks; Nickel; Organometallics; Strain; Energy conversion devices; Hydrogen binding; Hydrogen oxidation; Hydrogen oxidation reaction; Hydroxide exchange membranes; Nickel nanoparticles; Number of active sites; Platinum group metals; Metal nanoparticles
SDGs
Type
journal article