Molecular hydrogen is widely considered as a potential carbon-free and renewable energy carrier for a sustainable energy strategy. The electrocatalytic hydrogen evolution reaction is a major pathway to obtain ultra-pure hydrogen, and it vastly relies on the development of inexpensive electrocatalysts. In recent years, graphene has been proposed as a "metal-free" catalyst for the hydrogen evolution reaction. Here, we showed that metallic impurities are introduced during the synthesis process and these impurities act as the catalyst for the hydrogen evolution reaction.
Bibliographical noteFunding Information:
M.P. acknowledges the financial support of Grant Agency of the Czech Republic (EXPRO: 19-26896X).
All Science Journal Classification (ASJC) codes
- Materials Science(all)