串联
氨
吸附
催化作用
硝酸盐
电催化剂
材料科学
亚硝酸盐
电化学
化学
无机化学
物理化学
电极
有机化学
复合材料
作者
Yan Liu,Jie Wei,Zhengwu Yang,Lirong Zheng,Jiankang Zhao,Zhimin Song,Yuhan Zhou,Jiajie Cheng,Junyang Meng,Zhigang Geng,Jie Zeng
标识
DOI:10.1038/s41467-024-48035-4
摘要
Abstract The nitrate (NO 3 − ) electroreduction into ammonia (NH 3 ) represents a promising approach for sustainable NH 3 synthesis. However, the variation of adsorption configurations renders great difficulties in the simultaneous optimization of binding energy for the intermediates. Though the extensively reported Cu-based electrocatalysts benefit NO 3 − adsorption, one of the key issues lies in the accumulation of nitrite (NO 2 − ) due to its weak adsorption, resulting in the rapid deactivation of catalysts and sluggish kinetics of subsequent hydrogenation steps. Here we report a tandem electrocatalyst by combining Cu single atoms catalysts with adjacent Co 3 O 4 nanosheets to boost the electroreduction of NO 3 − to NH 3 . The obtained tandem catalyst exhibits a yield rate for NH 3 of 114.0 mg $${}_{{{{{{\rm{NH}}}}}}_3}$$ NH 3 h −1 cm −2 , which exceeds the previous values for the reported Cu-based catalysts. Mechanism investigations unveil that the combination of Co 3 O 4 regulates the adsorption configuration of NO 2 − and strengthens the binding with NO 2 − , thus accelerating the electroreduction of NO 3 − to NH 3 .
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