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Modulation of Reactive Hydrogen Adsorbed on Dual-Active Site NiMoO4 Nanocubes for Reduction of Nitrate to Ammonia.
- Source :
- ACS Applied Nano Materials; 6/14/2024, Vol. 7 Issue 11, p13338-13346, 9p
- Publication Year :
- 2024
-
Abstract
- Development of highly active and selective electrocatalysts for the reduction of nitrate (NO<subscript>3</subscript><superscript>–</superscript>) to ammonia is critical for the production of green ammonia. Herein, we designed and synthesized NiMoO<subscript>4</subscript> nanocubes as an efficient electrocatalyst for nitrate reduction using deep eutectic solvents (DESs) as synthesis media. By constructing Mo and Ni dual-active sites, Mo facilitates NO<subscript>3</subscript><superscript>–</superscript> adsorption/association, and Ni acts as an active hydrogen (*H) donating center. The amount and destination of *H can be regulated, which can effectively enhance the activity of the NO<subscript>3</subscript><superscript>–</superscript> reduction to NH<subscript>3</subscript> reaction (NO<subscript>3</subscript><superscript>–</superscript>RR). The optimized sample possessed excellent NO<subscript>3</subscript><superscript>–</superscript>RR activity. An NH<subscript>3</subscript>–N selectivity of up to 96.94% and a Faraday efficiency of up to 96.13% can be achieved at −0.4 V in a neutral solution. The catalytic NO<subscript>3</subscript><superscript>–</superscript>RR mechanism was also investigated by density functional theory (DFT) calculations. This dual-active site electrocatalyst provides an alternative idea for the synthesis and application of high-performance NO<subscript>3</subscript><superscript>–</superscript>RR catalysts. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 25740970
- Volume :
- 7
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- ACS Applied Nano Materials
- Publication Type :
- Academic Journal
- Accession number :
- 177927575
- Full Text :
- https://doi.org/10.1021/acsanm.4c01849