The remarkable role of metal promoters on the catalytic activity of Co-Cu based nanoparticles for boosting hydrogen evolution: Ammonia borane hydrolysis

[Display omitted] •Metal promoted CoCu TMNPs were developed for NH3BH3 hydrolysis.•Rh promoting provided the best activity for hydrogen evolution over TMNPs.•Kinetic and thermodynamic assessment were carried out. The development of highly efficient catalysts for hydrogen evolution has a crucial sign...

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Bibliographic Details
Published in:Applied catalysis. B, Environmental Environmental, 2018-12, Vol.238, p.365-380
Main Authors: Filiz, Bilge Coskuner, Figen, Aysel Kantürk, Piskin, Sabriye
Format: Article
Language:English
Subjects:
Ammonia
Ammonia borane
Catalysis
Catalysts
Catalytic activity
Clean energy
Co-Cu catalyst
Cobalt
Copper
Electronic influence
Evolution
Hydrogen
Hydrogen evolution
Hydrolysis
Kinetics
Metals
Nanoparticles
Nickel
Palladium
Performance tests
Platinum
Promoter
Promoters
Reaction mechanisms
Recyclability
Rhodium
Silver
Stability analysis
Thermodynamics
X ray photoelectron spectroscopy
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Summary:[Display omitted] •Metal promoted CoCu TMNPs were developed for NH3BH3 hydrolysis.•Rh promoting provided the best activity for hydrogen evolution over TMNPs.•Kinetic and thermodynamic assessment were carried out. The development of highly efficient catalysts for hydrogen evolution has a crucial significance due to adaptation for sustainable clean energy systems. This study provides potentially powerful approach for catalytic hydrogen evolution based on ammonia borane (NH3BH3) hydrolysis in presence of ternary metal nanoparticles (TMNPs). Herein, we draw up a strategy by using non-noble (Ni, Ag) and noble (Ru, Pt, Pd and Rh) metal promoters in the structure of Co-Cu nanoparticles to boost their catalytic activity for hydrogen evolution by NH3BH3 hydrolysis. Internal and external properties of TMNPs catalysts are characterized by using XRD, SEM/EDS, FTIR, XPS, XRF, ICP-OES, BET, TEM and SAED/HRTEM techniques and performed for hydrogen evolution tests. Kinetic and thermodynamic assessments, bimolecular reaction mechanism investigation and reusability-recyclability-stability performance results relieve that Rh promoted CoCu TMNPs delivers highest hydrogen evolution activity with 21.21 l H2  g−1cat min−1, 8582 molH2 molcat−1 h−1 initial turnover frequency (TOF) value, and 36.50 kJ mol−1 activation energy (Ea) by providing the release of 3 equivalent H2 per mole of NH3BH3 even after 10th use of catalytic performance tests.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2018.07.031