Noble Metal Supported on Metal Organic Frameworks derived Co@N-doped Carbon Polyhedra as Advanced Bifunctional Electrocatalysts
Bidushi Sarkar a, Debanjan Das a, Karuna Kar Nanda a
a Materials Research Centre, Indian Institute of Science, Bangalore-560012, India
nanoGe Fall Meeting
Proceedings of nanoGe Fall Meeting19 (NGFM19)
#SolCat19. (Photo)electrocatalysis for sustainable carbon utilization: mechanisms, methods, and reactor development
Berlin, Germany, 2019 November 3rd - 8th
Organizers: Matthew Mayer and Ludmilla Steier
Poster, Bidushi Sarkar, 350
Publication date: 16th July 2019

Development of eco-friendly, stable and affordable electrocatalysts is crucial for the sustainable energy production and storage units such as fuel cells, water electrolysis, and metal–air batteries. Metal organic frameworks (MOFs) are class of compounds in which metal ions are coordinated to an organic ligand. They have emerged as a great precursor for the synthesis of various electrocatalysts for Hydrogen Evolution Reaction (HER) and Oxygen Evolution Reaction (OER).[1]
Carbon motifs derived from zeolitic imidazole frameworks (ZIFs), a subfamily of MOFs, have exceptional mechanical and chemical stability due to the presence of metal-nitrogen bonds. Amongst various synthesized ZIFs, ZIF-67 has cobalt ions (Co2+) ions coordinated to imidazolate-type linkers. The ZIF-67 derived nanoporous carbon precursors are generally mesoporous, possess high degree of graphitization and large surface area.[2]
Herein, we have tried to immobilize noble metals like Pd, Pt and Ru on ZIF-67 precursor named as PdCo@NC, PtCo@NC and RuCo@NC, respectively. We have synthesized a series of electrocatalysts by a simple one-step pyrolysis. The as-synthesized catalysts show excellent bifunctional catalytic activity towards HER as well as OER in alkaline medium. The catalysts show long cycle stability and compete with the state-of-the-art electrocatalysts like RuO2 and Pt/C. PtCo@NC and RuCo@NC shows the best HER and OER, respectively. Further, the excellent electrocatalytic activity is explained based on a synergistic effect between the noble metal and ZIF-67 derived N-doped carbon support.

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