23-Feb-2021 - Max-Planck-Institut für Kohlenforschung

Discovery of New Solid Catalysts for Water Electrolysis

Green hydrogen - produced from water electrolysis by using sustainable electricity - is getting more attention due to its potential to be used as energy carrier as well as building block for various industrial processes. Among both half-reactions of water electrolysis, Oxygen Evolution Reaction (OER) is kinetically more challenging and it requires advances in the development of innovative electrocatalysts.

PD Dr. Harun Tüysüz (Max-Planck-Institut für Kohlenforschung), Prof. Dr. Claudia Felser (Max-Planck-Institut für Chemische Physik fester Stoffe) and co-workers have discovered a new type of OER electrocatalyst. A variety of Co2YZ type Heusler compounds with tunable physicochemical properties and well-defined topological surfaces were designed and demonstrated to effectively split water into oxygen and hydrogen. The systematic electrocatalytic investigation of the KOFO team proved a solid correlation between electron filling of d-orbitals of cobalt centers and their OER activities. The materials showed a volcano-shaped activity curve where the higher catalytic current was obtained for eg orbital filling approaching unity.

This work demonstrates proof of concept implementation of Heusler compounds as a new class of OER electrocatalysts, and the effect of orbital occupation on their catalytic performances.

Facts, background information, dossiers
More about MPI für Kohlenforschung
  • News

    New class of stable nickel complexes developed

    The use of nickel as a catalyst for the formation of chemical bonds is of great importance to the chemical industry - applications range from the production of fine chemicals to the synthesis of pharmaceuticals, insecticides and pesticides. For the production of nickel complexes, industry h ... more

    New findings on energy conversion during photosynthesis

    The sun sustains all life on earth through photosynthesis, the process by which plants and other organisms convert the energy of sunlight into chemical energy, stored in the bonds of organic molecules. A central challenge of modern science is to replicate this process using synthetic cataly ... more

    Nanoceramics from the ball mill

    Automotive catalysts, among others, and materials for dental implants could become more robust and easier to manufacture than ever before. This is because chemists at the Max-Planck-Institut für Kohlenforschung in Mülheim an der Ruhr have found a way to produce corundum (also known as alpha ... more

More about Max-Planck-Gesellschaft
  • News

    New microscopy method resolves fluorescent molecules with resolution at the nanometer scale

    Scientists working with Stefan Hell at the Max Planck Institute (MPI) for Biophysical Chemistry in Göttingen and the Heidelberg-based MPI for Medical Research have developed another light microscopy method, called MINSTED, which resolves fluorescently labeled details with molecular sharpnes ... more

    Microscopic crop protection

    Every year, fungal diseases of grapevines cause a loss of one billion euros. Conventional plant protection agents are largely powerless in combating them. A planned spin-off of the Max Planck Institute for Polymer Research (MPI-P) is now to further develop research into sustainable, microte ... more

    How humans affect indoor air

    Humans emit significant amounts of chemical compounds in indoor environments. Several studies published by scientists from the Max Planck Institute for Chemistry now show the extent to which we influence the air in enclosed spaces. Human bodies can have a strong impact on the chemical compo ... more