Proceedings of nanoGe September Meeting 2017 (NFM17)
Publication date: 20th June 2016
One of the emerging applications of 2 Dimensional materials is in electrocatalysis. This area is key to the development of energy conversion and storage devices such as batteries, fuel cells, electrolysers and photo-electrochemical cells. The focus of our work is to develop inexpensive, stable and catalytically active materials for the oxygen and hydrogen reactions, that can compete the performance of precious based catalysts.
In this talk, I will describe new results on addressing key challenges involved in optimizing catalytic performance in transition metal dichalcogenides (TMD) and heteroatom doped graphene. In particular, I will describe the effect of solvents in ink preparation and electrochemical activation for the hydrogen evolution reaction (HER) characteristics such as Tafel slope and current densities of TMDs. I will summarize our important developments in 2D materials including the size selection of exfoliated layers using sequential centrifugation[1-5]. New results on the hidden role of metal impurities on nitrogen doped graphene for influencing the oxygen reduction reaction performance will also be presented.
Benson, J. et al. “Electrocatalytic Hydrogen Evolution reaction on edges of a few layer Molybdenum disulfide nanodots”, ACS Applied Materials and Interfaces, 7 (2015) 14113.
Benson et al. “Tuning the catalytic activity of graphene nanosheets for oxygen reduction reaction via size and thickness reduction”, ACS Applied Materials & Interfaces, 6 (2014) 19726.
Wang, T. et al. “Size‐Dependent Enhancement of Electrocatalytic Oxygen‐Reduction and Hydrogen‐Evolution Performance of MoS2 Particles”,Chemistry-A European Journal 19 (2013), 11939.
Wang, T. et al. “Enhanced Electrocatalytic Activity for Hydrogen Evolution Reaction from Self-Assembled Monodispersed Molybdenum Sulfides nanoparticles on an Au electrode”, Energy Environ. Sci., 6 (2013) 625.
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