- Published
- 2021-06-25
- Venue
- ACS Catalysis, vol. 11, no. 14, pp. 8431-8442
- Cited by
- 317
- Open access
- No free copy found
- DOI
- 10.1021/acscatal.1c01525
Abstract
Removing excess nitrate (NO 3 – ) from waste streams has become a significant environmental and health topic. However, realizing highly selective NO 3 – conversion toward N 2, primarily via electrocatalytic conversions, has proven challenging, largely because of the kinetically uncontrollable NO 3 – -to-NO 2 – pathway and unfavorable N–N coupling. Herein, we discovered unique and ultra-high electrocatalytic NO 3 – -to-NO 2 – activity on oxide-derived silver (OD-Ag). Up to 98% selectivity and 95% Faradaic efficiency (FE) of NO 2 – were observed and maintained under a wide potential window. Benefiting from the superior NO 3 – -to-NO 2 – activity, further reduction of accumulated NO 2 – to NH 4 + was well regulated by the cathodic potential and achieved an NH 4 + FE of 89%, indicating a tunable selectivity to the key nitrate reduction products (NO 2 – or NH 4 + ) on OD-Ag. Density functional theory computations provided insights into the unique NO 2 – selectivity on Ag electrodes compared with Cu, showing the critical role of a proton-assisted mechanism. Based on the ultra-high NO 3 – -to-NO 2 – activity on OD-Ag, we designed a novel electrocatalytic–catalytic combined process for denitrifying real-world NO 3 – -containing agricultural wastewater, leading to 95+% of NO 3 – conversion to N 2 with minimal NO X gases. In addition to the wastewater treatment process to N 2 and the electrochemical synthesis of NH 3, NO 2 – derived from electrocatalytic NO 3 – conversion can serve as a reactive platform for the distributed production of various nitrogen products.
Cite this paper
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- APA 7
Liu, H., Park, J., Chen, Y., Qiu, Y., Cheng, Y., Srivastava, K., Gu, S., Shanks, B. H., Roling, L. T., & Li, W. (2021). Electrocatalytic Nitrate Reduction on Oxide-Derived Silver with Tunable Selectivity to Nitrite and Ammonia. ACS Catalysis, 11(14), 8431–8442. https://doi.org/10.1021/acscatal.1c01525
- MLA 9
Liu, Hengzhou, et al. "Electrocatalytic Nitrate Reduction on Oxide-Derived Silver with Tunable Selectivity to Nitrite and Ammonia." ACS Catalysis, vol. 11, no. 14, 2021, pp. 8431–8442, https://doi.org/10.1021/acscatal.1c01525.
- Chicago
Liu, Hengzhou, Jaeryul Park, Yifu Chen, Yang Qiu, Yan Cheng, Kartik Srivastava, Shuang Gu, Brent H. Shanks, Luke T. Roling, and Wenzhen Li. "Electrocatalytic Nitrate Reduction on Oxide-Derived Silver with Tunable Selectivity to Nitrite and Ammonia." ACS Catalysis 11, no. 14 (2021): 8431–8442. https://doi.org/10.1021/acscatal.1c01525.
- GOST
Liu H., Park J., Chen Y. [и др.] Electrocatalytic Nitrate Reduction on Oxide-Derived Silver with Tunable Selectivity to Nitrite and Ammonia // ACS Catalysis. — 2021. — Vol. 11, № 14. — P. 8431–8442. — URL: https://doi.org/10.1021/acscatal.1c01525
- BibTeX
@article{liu2021electrocatalytic, title = {{Electrocatalytic Nitrate Reduction on Oxide-Derived Silver with Tunable Selectivity to Nitrite and Ammonia}}, author = {Hengzhou Liu and Jaeryul Park and Yifu Chen and Yang Qiu and Yan Cheng and Kartik Srivastava and Shuang Gu and Brent H. Shanks and Luke T. Roling and Wenzhen Li}, journal = {ACS Catalysis}, year = {2021}, volume = {11}, number = {14}, pages = {8431--8442}, doi = {10.1021/acscatal.1c01525}, url = {https://doi.org/10.1021/acscatal.1c01525} }- RIS
TY - JOUR AU - Liu, Hengzhou AU - Park, Jaeryul AU - Chen, Yifu AU - Qiu, Yang AU - Cheng, Yan AU - Srivastava, Kartik AU - Gu, Shuang AU - Shanks, Brent H. AU - Roling, Luke T. AU - Li, Wenzhen TI - Electrocatalytic Nitrate Reduction on Oxide-Derived Silver with Tunable Selectivity to Nitrite and Ammonia JO - ACS Catalysis VL - 11 IS - 14 SP - 8431 EP - 8442 PY - 2021 DA - 2021/06/25 DO - 10.1021/acscatal.1c01525 UR - https://doi.org/10.1021/acscatal.1c01525 ER -
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