 This research paper discusses the development of a new type of catalyst for the hydrogen evolution reaction, HA, which is important for achieving a net-zero carbon emission society. The authors have developed a novel method for creating a catalyst with specific desired properties, including high catalytic activity. They found that the catalyst's activity was correlated with the ratio of cobalt atoms bonded to nitrogen versus those bonded to selenium atoms. In particular, they discovered that a catalyst with a higher proportion of cobalt atoms bonded to nitrogen had higher HA activity than one with more cobalt atoms bonded to selenium. This finding suggests that the structure of the catalyst plays a key role in determining its efficiency. This article was authored by Rui Wu, Jie Xu, Tuan Ling Zhao, and others.