Paper

Whither Aqueous Electro-reduction of Nitrogen to Ammonia?

Electrochemical reduction of N 2 (NRR) is widely recognised as an alternative to the traditional Haber-Bosch production process for ammonia. The high-energy efficiency, low-cost variant of this process involves an aqueous electrolyte and there is now a substantial literature on this topic. However, though the challenges of NRR experiments have become better understood, the reported rates in these aqueous solution studies are often too low to be convincing that reduction of the highly unreactive N 2 molecule has actually been achieved. Unfortunately, there are many possible impurity sources that can interfere with robust measurements. In this presentation we will discuss…

Paper

High Efficiency Electrochemical Synthesis of Ammonia from Nitrogen at Ambient Temperature and Pressure

Ammonia as well as being an important fertiliser is being increasingly considered as an easily transported carrier of hydrogen energy. However, the traditional Haber-Bosch process for the production of ammonia from atmospheric nitrogen and fossil fuels is a high temperature and pressure process that is energy intensive. Newer technology is being investigated to produce sustainable ammonia from green energy. An ambient temperature, electrochemical synthesis of ammonia is an attractive alternative approach, but has, to date, not been achieved at high efficiency. Researchers from Monash University have obtained faradaic efficiency as high as 60% using liquid salt electrolytes under ambient conditions,…