Nature CommunicationsReversible bismuth reduction-driven dark photoelectrochemistryYing QinYuanxing ChenHaifei WanSiting WuJingyi ZhangWenhong YangYifei ChenLiuyong HuWenling GuChengzhou Zhu2026-01-22Full textDOI https://doi.org/10.1038/s41467-026-68359-7