FeTiO3/TiO2 heterojunction for the electrocatalytic and photo-assisted electrocatalytic reduction of nitric oxide into ammonia

FeTiO3/TiO2 (3) (FTTO) was successfully synthesized and applied for both electrocatalytic NO reduction reaction (eNORR) e NORR) and photo-assisted e NORR. By introducing Fe into TiO2, a heterojunction of FeTiO3/TiO2 was constructed to enhance the electron transfer capability. The large specific surface area of FTTO can provide more active sites. In the e NORR, the FTTO achieved an NH3 yield of 2845.82 mu g h(- 1) mg(-1 )at a voltage of-0.70 V (vs. RHE) in K(2)SO(4 )solution, which is 2.04 times that of unmodified TiO2. In the photo-assisted e NORR, the FTTO photoelectrode showed superior ammonia yield of 4259.97 mu g h(- 1) mg(-1 ), which is 11.74 times of that under exclusive illumination and 1.50 times for e NORR. The Zn-NO battery system, using FTTO as the positive electrode and Zn as the negative electrode, demonstrated an open-circuit voltage (OCV) of 2.15 V vs. Zn and an NH3 yield of 388.72 mu g h(- 1) mg(-1) at a current density of 5 mA cm(-2 ).