Our group focuses on hydrongen production and usage, that is, water splitting and fuel cell under acid solution. As for water splitiing, we have developed a series of low-noble Ir catalystics to match commercial application. Further, in-situ/operando characterizations are used to explore the evolution of active sites under service condition.  Meanwhile, we also propose a purification route of low-quality hydrogen for meeting the usage of fuel cell, which also present a highly anti-poisoning ability. We hope to explore and elucidate the fundammental mechanisms of catalysts under service conditions for guiding its practical application.