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Efficient Hydrogen Oxidation Catalyzed by Strain‐Engineered Nickel Nanoparticles
Author(s) -
Ni Weiyan,
Wang Teng,
Schouwink Pascal Alexander,
Chuang YuChun,
Chen Hao Ming,
Hu Xile
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201916314
Subject(s) - catalysis , nickel , hydrogen , nanoparticle , pyrolysis , chemistry , hydroxide , metal , inorganic chemistry , chemical engineering , carbon fibers , hydrogen fuel , transition metal , materials science , nanotechnology , organic chemistry , composite number , engineering , composite material
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‐H 2 ‐2 %, was optimized through pyrolysis of a Ni‐containing metal‐organic framework precursor under a mixed N 2 /H 2 atmosphere, which yielded carbon‐supported Ni nanoparticles with different levels of strains. The Ni‐H 2 ‐2 % catalyst has an optimal level of strain, which leads to an optimal hydrogen binding energy and a high number of active sites.