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Article Abstract
Ammonia (NH ) is an indispensable feedstock for fertilizer production and one of the most ideal green hydrogen rich fuel. Electrochemical nitrate (NO ) reduction reaction (NO RR) is being explored as a promising strategy for green to synthesize industrial-scale NH , which has nonetheless involved complex multi-reaction process. This work presents a Pd-doped Co O nanoarray on titanium mesh (Pd-Co O /TM) electrode for highly efficient and selective electrocatalytic NO RR to NH at low onset potential. The well-designed Pd-Co O /TM delivers a large NH yield of 745.6 µmol h cm and an extremely high Faradaic efficiency (FE) of 98.7% at -0.3 V with strong stability. These calculations further indicate that the doping Co O with Pd improves the adsorption characteristic of Pd-Co O and optimizes the free energies for intermediates, thereby facilitating the kinetics of the reaction. Furthermore, assembling this catalyst in a Zn-NO battery realizes a power density of 3.9 mW cm and an excellent FE of 98.8% for NH .
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Pd-Doped Co O Nanoarray for Efficient Eight-Electron Nitrate Electrocatalytic Reduction to Ammonia Synthesis.
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October 2023
Huzhou Key Laboratory of Translational Medicine, First People's Hospital affiliated to Huzhou University, Huzhou, Zhejiang, 313000, China.
Article Synopsis
- Ammonia (NH₃) is a crucial ingredient for fertilizers and a potential green hydrogen fuel source, and researchers are exploring electrochemical nitrate reduction (NO₃ RR) as a method to produce ammonia sustainably.
- A new catalyst, Pd-doped Co₃O₄ nanoarray on titanium mesh (Pd-Co₃O₄/TM), has been developed to efficiently convert nitrate to ammonia at low energy costs, achieving a remarkable ammonia yield and high Faradaic efficiency.
- The catalyst's design enhances its performance by improving the adsorption characteristics and optimizing reaction intermediates, making it effective for use in a Zn-NO₃ battery with significant power output.