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ITO@TiO2 nanoarray: An efficient and robust nitrite reduction reaction electrocatalyst toward NH3 production under ambient conditions
- Source :
- eScience, Vol 2, Iss 4, Pp 382-388 (2022)
- Publication Year :
- 2022
- Publisher :
- KeAi Communications Co. Ltd., 2022.
-
Abstract
- Ambient electrochemical nitrite (NO2-) reduction is viewed as an effective and sustainable approach for simultaneously removing NO2- and producing ammonia (NH3). However, the complex multi-electron transfer steps involved in the NO2- reduction reaction (NO2-RR) lead to sluggish kinetics and low product selectivity toward NH3, underscoring the need for NH3 synthesis electrocatalysts with high activity and durability. Herein, we report amorphous indium–tin oxide sputtered on a TiO2 nanobelt array on a Ti plate (ITO@TiO2/TP) as a 3D NH3-producing catalyst for the NO2-. In 0.5 M LiClO4 with 0.1 M NO2-, it shows greatly boosted NO2-RR activity toward NH3 production, with excellent selectivity, achieving a large NH3 yield of 411.3 μmol h−1 cm−2 and a high Faradaic efficiency of 82.6%. It also shows high durability for continuous electrolysis. A Zn‐NO2- battery with ITO@TiO2/TP cathode offers an NH3 yield of 23.1 μmol h−1 cm−2 and a peak power density of 1.22 mW cm−2.
Details
- Language :
- English
- ISSN :
- 26671417
- Volume :
- 2
- Issue :
- 4
- Database :
- Directory of Open Access Journals
- Journal :
- eScience
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.f125cfa8088e47088baf182aaffb7dd7
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.esci.2022.04.008