Magnetically Isolable Pt0/Co3O4 Nanocatalysts: Outstanding Catalytic Activity and High Reusability in Hydrolytic Dehydrogenation of Ammonia Borane

Serdar Akbayrak; Saim Özkar

doi:10.1021/acsami.1c08362

Magnetically Isolable Pt⁰/Co₃O₄ Nanocatalysts: Outstanding Catalytic Activity and High Reusability in Hydrolytic Dehydrogenation of Ammonia Borane

ACS Appl Mater Interfaces. 2021 Jul 28;13(29):34341-34348. doi: 10.1021/acsami.1c08362. Epub 2021 Jul 13.

Authors

Serdar Akbayrak^{1

2

3}, Saim Özkar¹

Affiliations

¹ Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey.
² Department of Chemistry, Sinop University, 57000 Sinop, Turkey.
³ Department of Basic Sciences, Faculty of Engineering, Necmettin Erbakan University, 42090 Konya, Turkey.

PMID: 34255473
DOI: 10.1021/acsami.1c08362

Abstract

The development of a new platinum nanocatalyst to maximize the catalytic efficiency of the precious noble metal catalyst in releasing hydrogen from ammonia borane (AB) is reported. Platinum(0) nanoparticles are impregnated on a reducible cobalt(II,III) oxide surface, forming magnetically isolable Pt⁰/Co₃O₄ nanocatalysts, which have (i) superb catalytic activity providing a record turnover frequency (TOF) of 4366 min^-1 for hydrogen evolution from the hydrolysis of AB at room temperature and (ii) excellent reusability, retaining the complete catalytic activity even after the 10th run of hydrolysis reaction. The outstanding activity and stability of the catalyst can be ascribed to the strong interaction between the platinum(0) nanoparticles and reducible cobalt oxide, which is supported by the results of XPS analysis. Pt⁰/Co₃O₄ exhibits the highest TOF among the reported platinum-nanocatalysts developed for hydrogen generation from the hydrolysis of AB.

Keywords: ammonia borane; catalysis; cobalt(II,III) oxide; hydrogen release; platinum nanoparticles.