Morphological engineering and valence state strategy enable stable nitrate-to-ammonia electroconversion at copper surface in the wide pH range - Yue-Han Qin; Xiao-Hui Wang; Ze-Nong Zhang; Shi-Bin Yin; Cong-Cong Han; Xuan Ai; Shu-Ni Li; Xin Wang; Yu Chen (Chemical Engineering Journal, 2026)