Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 856, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.158038
Keywords
Carbon dots (CDs); Metal organic framework (MOF); Composite; Oxygen evolution reaction (OER)
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Funding
- Bahauddin Zakariya University, Multan Pakistan [DREL/D-545]
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This study synthesized a Ni-based mixed linker Metal Organic Framework (MOF) using 1,3,5-benzenetricarboxylic acid (BTC) and 4,4'-bipyridine (bpy) as organic linkers. Carbon Dots (CDs) were incorporated during synthesis to create a composite with synergistic effect.
Craving to search sources of energy is constantly compelling the mankind to find a source that is renewable or has enormous reservoirs and at the same time it poses no hazardous effect to mankind. Today's energy deficient world has been seeking for an electrocatalyst which has a simple and facile synthesis strategy with marvellous catalytic performance and has outstandingly sustained stability for the highly lethargic Oxygen Evolution Reaction (OER). Here, a Ni-based mixed linker Metal Organic Framework (MOF) was synthesized using 1,3,5-benzenetricarboxylic acid (BTC) and 4,4'-bipyridine (bpy) as organic linkers. Carbon Dots (CDs) were incorporated into MOF during synthesis to impart synergistic effect to the as-synthesized composite. All the synthesized samples i.e CDs, MOF and CDs@MOF were characterized by various techniques to confirm the structural, compositional, morphological and textural analysis. The synthesized composite possessed rods like morphology with uniform distribution of CDs which offered superb stability for almost 40 hrs, large electrochemical active surface area (ECSA), least charge transfer resistance (R-ct), high turnover frequency (TOF), reasonably low onset potential, low overpotential and a comparably low Tafel slope. The electrocatalyst owed its great catalytic efficiency and substantial stability due to the synergistic effect between CDs and MOF. This work is an effort to exploit the fabulous potential of MOF based nano-composite towards water splitting. (C) 2020 Elsevier B.V. All rights reserved.
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