Isolated Diatomic Ni-Fe Metal-Nitrogen Sites for Synergistic Electroreduction of CO2.

By Wenhao Ren, X. Tan, Wanfeng Yang, Chen Jia, Shumao Xu, Kaixue Wang, Sean C. Smith, Chuan Zhao. Angewandte Chemie, 2019

807 citations recorded by the source corpus.

Polynary single-atom structures can combine the advantages of homogeneous and heterogeneous catalysts while providing synergistic functions based on different molecules and their interfaces. However, the fabrication and identification of such an active-site prototype remain elusive. Here we report isolated diatomic Ni-Fe sites anchored on nitrogenated carbon as an efficient electrocatalyst for CO2 reduction. The catalyst exhibits high selectivity with CO Faradaic efficiency above 90 % over a wide potential range from -0.5 to -0.9 V (98 % at -0.7 V), and robust durability, retaining 99 % of its initial selectivity after 30 hours of electrolysis. Density functional theory studies reveal that the neighboring Ni-Fe centers not only function in synergy to decrease the reaction barrier for the formation of COOH* and desorption of CO, but also undergo distinct structural evolution into a CO-adsorbed moiety upon CO2 uptake.

Subfields: Catalysis, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/f2453692b9d2ba607bd20ffbc83d5aa3b2326052

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Catalysis

1. P. Strasser
2. A. Varela
3. Karen Chan
4. J. Rossmeisl
5. A. Bagger
6. B. Roldán Cuenya
7. Jens K. Nørskov

In Renewable Energy, Sustainability and the Environment

1. P. Strasser
2. Karen Chan
3. A. Varela
4. B. Roldán Cuenya
5. I. Stephens
6. J. Rossmeisl
7. M. Koper
8. A. Bagger

Citations in the corpus

• 2022 roadmap on low temperature electrochemical CO2 reduction (2022, background): “Alternatively, both metals can be forming dual active sites on which the reaction’s energy barriers are lowered reducing the reaction’s overpotentials [130].”