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Ammonia synthesis via a protonic ceramic electrolysis cell (PCEC) using LaCu0.1Fe0.9O3−δ catalyst.
- Source :
- Journal of Materials Chemistry A; 1/14/2024, Vol. 12 Issue 2, p1200-1210, 11p
- Publication Year :
- 2024
-
Abstract
- The development of electrochemical nitrogen reduction reaction (NRR) catalysts with high catalytic activity and high stability is a significant challenge. In this work, a LaCu<subscript>0.1</subscript>Fe<subscript>0.9</subscript>O<subscript>3−δ</subscript> (LCuF) electrocatalyst for NRR was developed based on B-site Cu doping in the LaFeO<subscript>3</subscript> (LF) perovskite. Good NRR catalytic performance and long-term stability were achieved when this catalyst was used as the cathode material for a protonic ceramic electrolysis cell (PCEC). Experimental results demonstrate that the synergistic effect between Cu and Fe enhances the NRR activity of this electrocatalyst. Electrons are transferred through the Fe–O<superscript>2−δ</superscript>–Cu chain, resulting in the formation of more Fe<superscript>4+</superscript> at Fe sites and more Cu<superscript>+</superscript> at Cu sites. This accelerates the electron transfer rate and thus increases the NRR rate. At the same time, more oxygen vacancies (OVs) are generated around Cu<superscript>+</superscript>. Fe<superscript>4+</superscript> and OVs are both electron-deficient species, which are helpful for activating N<subscript>2</subscript> by trapping metastable electrons in the anti-bonding orbitals of adsorbed nitrogen molecules. This work provides a viable strategy for developing a highly efficient NRR electrocatalyst. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 12
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 174575681
- Full Text :
- https://doi.org/10.1039/d3ta04559e