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Articles by Kai junge Puring in JoVE
Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications Kai junge Puring1,2, Stefan Piontek1, Mathias Smialkowski1, Jens Burfeind2, Stefan Kaluza2, Christian Doetsch2, Ulf-Peter Apfel1 1Faculty of Chemistry and Biochemistry, Inorganic Chemistry I, Ruhr-University Bochum, 2Fraunhofer Institute for Environmental, Safety, and Energy Technology, UMSICHT A facile preparation method of electrodes using the bulk material Fe4.5Ni4.5S8 is presented. This method provides an alternative technique to conventional electrode fabrication and describes prerequisites for unconventional electrode materials including a straightforward electrocatalytic testing method.
Other articles by Kai junge Puring on PubMed
Pentlandite Rocks As Sustainable and Stable Efficient Electrocatalysts for Hydrogen Generation Nature Communications. Jul, 2016 | Pubmed ID: 27461840 The need for sustainable catalysts for an efficient hydrogen evolution reaction is of significant interest for modern society. Inspired by comparable structural properties of [FeNi]-hydrogenase, here we present the natural ore pentlandite (Fe4.5Ni4.5S8) as a direct 'rock' electrode material for hydrogen evolution under acidic conditions with an overpotential of 280 mV at 10 mA cm(-2). Furthermore, it reaches a value as low as 190 mV after 96 h of electrolysis due to surface sulfur depletion, which may change the electronic structure of the catalytically active nickel-iron centres. The 'rock' material shows an unexpected catalytic activity with comparable overpotential and Tafel slope to some well-developed metallic or nanostructured catalysts. Notably, the 'rock' material offers high current densities (≤650 mA cm(-2)) without any loss in activity for approximately 170 h. The superior hydrogen evolution performance of pentlandites as 'rock' electrode labels this ore as a promising electrocatalyst for future hydrogen-based economy.