Energy-efficient electrochemical ammonia removal enabled by replacing hydrogen evolution with four-electron oxygen reduction at the cathode - Zeyu Du; Yongyang Chen; Xiaowei An; Changhui Zhou; Yaobin Wang; Chaoyue Xie; Ruiqing Zhao; Zhiyuan Su; Zhinan Dai; Yichen Gong; Guanjun Qu; Fangzhou Li; et al. (Water Research, 2026)