Abstract
Currently, the energy and capital intensive Haber–Bosch process still dominates NH
3
synthesis which operates at high temperatures and pressures releasing inevitably large amounts of CO
2
. The electrocatalytic N
2
reduction reaction (NRR) offers us an environmentally-friendly and sustainable route for NH
3
synthesis under ambient conditions. In this communication, we describe that TiS
2
nanosheets (TiS
2
NSs) behave as efficient transition-metal-based NRR electrocatalysts for N
2
-to-NH
3
conversion with excellent selectivity. When tested in 0.1 M Na
2
SO
4
, such TiS
2
NSs achieve a high faradaic efficiency of 5.50% and a large NH
3
yield of 16.02 μg h
−1
mg
−1
cat
at −0.6 V
vs.
reversible hydrogen electrode, which is superior to bulk TiS
2
(5.84 μg h
−1
mg
−1
cat
; 1.66%). Notably, this catalyst also shows strong stability during electrolysis and recycling tests.