In advancing sustainable energy solutions, an international collaborative team of scientists has achieved a significant milestone in low-carbon chemical conversion. In their recent publication in Nature, the team, led by Professors Zhengxiao GUO of Department of Chemistry at The University of Hong Kong (HKU), Weixin HUANG of University of Science and Technology of China, Richard CATLOW of University College London and Junwang TANG of Tsinghua University, have discovered a photocatalytic approach to converting methane to ethanol with high selectivity of around 80% and a methane conversion rate of 2.3% in a single run using a packed-bed flow reactor. The system achieves an impressive apparent quantum efficiency (AQE) of 9.4%, which measures how effectively it converts incident photons into electrons that participate in the reaction under specific wavelength conditions.