Abstract
The electrocatalytic processes for the energy conversion are the key aspects in the development of sustainable economy. Being one of the main technological stimuli of electrocatalysis research, the direct chemical-to-electrical energy interconversion is employed in a variety of applications from the electrical transportation to the balancing of the grid. Among the examples of the electrocatalytic processes, where the wide commercialization is limited by the cost of catalysts, the oxygen reduction reaction (ORR) and the hydrogen evolution reaction (HER) are the most critical for the development of technological infrastructure of fuel cells. This stipulates the intensive research on noble-metal-free electrocatalysts.The quantification of ORR and HER on the intrinsically conducting polymers allows the rational design of catalyst, systematic investigation of mass transport phenomena and mechanistic evaluation of electrocatalysis due to the open material architecture. Firstly, the landscape of ORR phenomena happening on conjugated polymers is discussed at the mechanistic and device levels. The effects of co-catalyst and proton supply on ORR efficiency and the pathway is illustrated on the examples of poly(3,4-ethylenedioxythiophene) (PEDOT) [1-4] and other polymers as organic ORR catalyst. Secondly, the effect of proton supply is rationalized at both mechanistic and device levels for HER on PEDOT-triflate [5].
Published Version
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