Intermetallic Single-Atom Alloy In–Pd Bimetallene for Neutral Electrosynthesis of Ammonia from Nitrate

• DOI: 10.1021/jacs.3c03432
• Publication Date: 2023-06-19T15:28:36Z
• Authors: Minghao Xie; Sishuang Tang; Zhao Li; Maoyu Wang; Zhaoyu Jin; Panpan Li; Xun Zhan; Hua Zhou; Guihua Yu
• Keywords: Electrosynthesis; Ammonia production

Harvesting recyclable ammonia (NH3) from the electrocatalytic reduction of nitrate (NO3RR) offers a sustainable strategy to close ecological nitrogen cycle nitration contamination in an energy-efficient and environmentally friendly manner. The emerging intermetallic single-atom alloys (ISAAs) are recognized achieve highest site density single atoms by isolating contiguous metal into sites stabilized another within structure, which holds promise couple catalytic benefits nanocrystals catalysts for promoting NO3RR. Herein, ISAA In-Pd bimetallene, Pd isolated surrounding In atoms, is reported boost neutral NO3RR with NH3 Faradaic efficiency (FE) 87.2%, yield rate 28.06 mg h-1 mgPd-1, exceptional stability increased activity/selectivity over 100 h 20 cycles. structure induces substantially diminished overlap d-orbitals narrowed p-d hybridization In-p Pd-d states around Fermi level, resulting stronger NO3- adsorption depressed energy barrier potential-determining step Further integrating catalyst Zn-NO3- flow battery as cathode delivers power 12.64 mW cm-2 FE 93.4% production.