At the beginning of the 21^st century our world is facing serious problems with regards to environment, climate, energy conversion, raw materials and food. All these global problems are seeking scientific solutions, especially from chemistry, and in this connection electrochemistry and catalysis are of tremendous importance, in particular for energy conversion and pollution control such as i) how to supply future energy alternatives (hydrogen) and ii) create valuable chemicals or fuels from greenhouse gas, i.e., carbon dioxide (CO₂). In this presentation, I shall intend to introduce very efficient co-electrocatalytic processes for hydrogen production from ammonia and fuels from CO₂ by applying a near zero-gap cell, which consists of a membrane electrode assembly.