NiSn Atomic Pair on an Integrated Electrode for Synergistic Electrocatalytic CO 2 Reduction
| Autor: | Jianbo Li, Jin Yong Lee, Wenfu Xie, Shijin Li, Yuke Song, Min Wei, Mingfei Shao, Hao Li, Xin Zhang, Guoqing Cui |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
010405 organic chemistry Inorganic chemistry General Medicine General Chemistry 010402 general chemistry Electrocatalyst Electrochemistry Heterogeneous catalysis 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound chemistry Electrode Synergistic catalysis Formate Selectivity |
| Zdroj: | Angewandte Chemie International Edition. 60:7382-7388 |
| ISSN: | 1521-3773 1433-7851 |
| DOI: | 10.1002/anie.202014655 |
| Popis: | The development of efficient electrocatalysts for the CO2 reduction reaction (CO2 RR) remains a challenge. Demonstrated here is a NiSn atomic-pair electrocatalyst (NiSn-APC) on a hierarchical integrated electrode, which exhibits a synergistic effect in simultaneously promoting the activity and selectivity of the CO2 RR to formate. The NiSn atomic pair consists of adjacent Ni and Sn, each coordinated with four nitrogen atoms (N4 -Ni-Sn-N4 ). The as-prepared NiSn-APC displays exceptional activity for the CO2 RR to formate with a turnover frequency of 4752 h-1 , a formate productivity of 36.7 mol h-1 gSn -1 and an utilization degree of active sites (57.9 %), which are superior to previously reported single-atomic catalysts. Both experimental data and density-functional theory calculations verify the electron redistribution of Sn imposed by adjacent Ni, which reduces the energy barrier of the *OCHO intermediate and makes this potential-determining step thermodynamically spontaneous. This synergistic catalysis provides a successful paradigm for rational design and preparation of atomic-pair electrocatalysts with enhanced performance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text