Pd<sub>1</sub>Cu Single-Atom Alloys for High-Current-Density and Durable NO-to-NH<sub>3</sub> Electroreduction.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38185876.
- Also identified by DOI 10.1021/acs.nanolett.3c02259.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Electrochemical reduction of NO to NH<sub>3</sub> (NORR) offers a prospective method for efficient NH<sub>3</sub> electrosynthesis. Herein, we first design single-atom Pd-alloyed Cu (Pd<sub>1</sub>Cu) as an efficient and robust NORR catalyst at industrial-level current densities (>0.2 A cm<sup>-2</sup>). Operando spectroscopic characterizations and theoretical computations unveil that Pd<sub>1</sub> strongly electronically couples its adjacent two Cu atoms (Pd<sub>1</sub>Cu<sub>2</sub>) to enhance the NO activation while promoting the NO-to-NH<sub>3</sub> protonation energetics and suppressing the competitive hydrogen evolution. Consequently, the flow cell assembled with Pd<sub>1</sub>Cu exhibits an unprecedented NH<sub>3</sub> yield rate of 1341.3 μmol h<sup>-1</sup> cm<sup>-2</sup> and NH<sub>3</sub>-Faradaic efficiency of 85.5% at an industrial-level current density of 210.3 mA cm<sup>-2</sup>, together with an excellent long-term durability for 200 h of electrolysis, representing one of the highest NORR performances on record.