A new catalyst developed by chemists at Leiden University can convert carbon dioxide into methane. The conversion could be implemented in a cost-effective and controllable way, according to the catalyst's inventors Marc Koper and Jing Shen. The process involves bubbling CO2 through an acid solution in which sits a low-voltage (0.5 V) graphite electrode. The cobalt-porphyrin catalyst - akin to the core of vitamin B12 - was previously shown to convert CO2 into carbon monoxide and methane with hydrogen as a byproduct. Koper and Shen have now shown for the first time that they can minimise the hydrogen and generate maximum methane.
Carbon dioxide to methane