催化作用
选择性
吸附
化学
氢键
光化学
质子化
法拉第效率
石墨烯
氧化物
无机化学
分子
电化学
材料科学
物理化学
纳米技术
离子
有机化学
电极
作者
Shaoce Zhang,Hu Hong,Rong Zhang,Zhiquan Wei,Yiqiao Wang,Dong Chen,Chuan Li,Pei Li,Huilin Cui,Yue Hou,Shengnan Wang,Johnny C. Ho,Ying Guo,Zhaodong Huang,Chunyi Zhi
标识
DOI:10.1002/anie.202412830
摘要
In the electrochemical nitrogen reduction reaction (NRR), a leverage relationship exists between NH3‐producing activity and selectivity because of the competing hydrogen evolution reaction (HER), which means that high activity with strong protons adsorption causes low product selectivity. Herein, we design a novel metal‐organic hydrogen bonding framework (MOHBF) material to modulate this leverage relationship by a hydrogen‐bond‐regulated proton transfer pathway. The MOHBF material was composited with reduced graphene oxide (rGO) to form a Ni‐N2O2 molecular catalyst (Ni‐N2O2/rGO). The unique structure of O atoms in Ni‐O‐C and N‐O‐H could form hydrogen bonds with H2O molecules to interfere with protons being directly adsorbed onto Ni active sites, thus regulating the proton transfer mechanism and slowing the HER kinetics, thereby modulating the leverage relationship. Moreover, this catalyst has abundant Ni‐single‐atom sites enriched with Ni‐N/O coordination, conducive to the adsorption and activation of N2. The Ni‐N2O2/rGO exhibits simultaneously enhanced activity and selectivity of NH3 production with a maximum NH3 yield rate of 209.7 μg h−1 mgcat.−1 and a Faradaic efficiency of 45.7%, outperforming other reported single‐atom NRR catalysts.
科研通智能强力驱动
Strongly Powered by AbleSci AI