Nickel Hydroxide Catalyzed Bias-free Photoelectrochemical NH₃ Production via Nitrate Reduction.

ABSTRACT: The photoelectrochemical nitrate reduction reaction (PEC NO₃RR) potentially converts nitrate, a major water pollutant, into NH₃, which is an eco-friendly, next-generation energy source. However, achieving high efficiency in the PEC NO₃RR has been challenging because of the need for high applied voltage and competition with the hydrogen evolution reaction (HER). In this study, a PEC NO₃RR is successfully implemented that demonstrated a high NH₃ production rate of 2468 µg cm^-2 h^-1 (at -0.1 V vs RHE) using a c-Si photocathode with Ni foil as the catalyst. Conducting the PEC NO₃RR under alkaline conditions can lead to the self-activation of the Ni surface with Ni(OH)₂. Ni(OH)₂ can supp

SUBMITTER: Jin W 

PROVIDER: S-EPMC12464643 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature