Electrochemical oxygen reduction catalysed by Ni3(hexaiminotriphenylene)2

Elise M. Miner, Tomohiro Fukushima, Dennis Sheberla, Lei Sun, Yogesh Surendranath and Mircea Dincă ()
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Elise M. Miner: Massachusetts Institute of Technology
Tomohiro Fukushima: Massachusetts Institute of Technology
Dennis Sheberla: Massachusetts Institute of Technology
Lei Sun: Massachusetts Institute of Technology
Yogesh Surendranath: Massachusetts Institute of Technology
Mircea Dincă: Massachusetts Institute of Technology

Nature Communications, 2016, vol. 7, issue 1, 1-7

Abstract: Abstract Control over the architectural and electronic properties of heterogeneous catalysts poses a major obstacle in the targeted design of active and stable non-platinum group metal electrocatalysts for the oxygen reduction reaction. Here we introduce Ni3(HITP)2 (HITP=2, 3, 6, 7, 10, 11-hexaiminotriphenylene) as an intrinsically conductive metal-organic framework which functions as a well-defined, tunable oxygen reduction electrocatalyst in alkaline solution. Ni3(HITP)2 exhibits oxygen reduction activity competitive with the most active non-platinum group metal electrocatalysts and stability during extended polarization. The square planar Ni-N4 sites are structurally reminiscent of the highly active and widely studied non-platinum group metal electrocatalysts containing M-N4 units. Ni3(HITP)2 and analogues thereof combine the high crystallinity of metal-organic frameworks, the physical durability and electrical conductivity of graphitic materials, and the diverse yet well-controlled synthetic accessibility of molecular species. Such properties may enable the targeted synthesis and systematic optimization of oxygen reduction electrocatalysts as components of fuel cells and electrolysers for renewable energy applications.

Date: 2016
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DOI: 10.1038/ncomms10942

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