New electrode enhances hydrogen production from hydrogen sulfide

Researchers have made progress in improving the way hydrogen sulfide (H2S) is handled. H2S is a toxic byproduct from fossil fuel extraction that can harm the environment. The traditional method, called the Claus process, converts H2S into sulfur but does not produce hydrogen gas, which is a missed chance for clean energy. A new technique called electrocatalytic H2S decomposition could address this problem. It can help eliminate pollution while generating green hydrogen. However, existing methods struggle due to the corrosive nature of H2S, which damages metal catalysts and reduces their effectiveness. A study led by researchers from the Dalian Institute of Chemical Physics in China introduces a new type of electrode. This dual-level chainmail integrated-electrode improves efficiency in producing hydrogen from H2S. The electrode combines graphene with nickel foam, enhancing both its activity and durability. This new electrode can operate at an industrial-level current density of over 1 A/cm2, significantly outperforming current commercial options. It also proved to be stable for more than 300 hours, lasting at least ten times longer than other nickel foam electrodes. In tests, the new electrode efficiently removed H2S and produced sulfur powder while generating high-purity hydrogen. When compared to traditional water electrolysis, this method uses 43% less energy at a current density of 200 mA/cm2, making it a more sustainable option for hydrogen production. "This research offers an efficient and low-energy solution for purifying natural gas and highlights the potential to turn H2S into valuable hydrogen fuel for various industrial uses," said Prof. Deng, one of the lead researchers.