TY - JOUR
T1 - Highly reactive Cu-Pt bimetallic 3D-electrocatalyst for selective nitrate reduction to ammonia
AU - Cerrón-Calle, Gabriel Antonio
AU - Fajardo, Ana S.
AU - Sánchez-Sánchez, Carlos M.
AU - Garcia-Segura, Sergi
N1 - Funding Information:
The authors acknowledge the support of the Centre National de la Recherche Scientifique (CNRS). This work was partially funded by the National Science Foundation (NSF) through the Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment under project EEC-1449500. This project has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No 843870. We would like to thank Kenneth R. Flores for his assistance on the ICP-MS measurements. We thank De Nora Tech, LLC for kindly providing the DSA® electrodes used as anode in our electrochemical system. We acknowledge the use of facilities within the Eyring Materials Center at Arizona State University supported in part by NNCI-ECCS-1542160.
Funding Information:
The authors acknowledge the support of the Centre National de la Recherche Scientifique (CNRS). This work was partially funded by the National Science Foundation (NSF) through the Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment under project EEC-1449500. This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No 843870. We would like to thank Kenneth R. Flores for his assistance on the ICP-MS measurements. We thank De Nora Tech, LLC for kindly providing the DSA® electrodes used as anode in our electrochemical system. We acknowledge the use of facilities within the Eyring Materials Center at Arizona State University supported in part by NNCI-ECCS-1542160.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/3
Y1 - 2022/3
N2 - Identifying electrocatalytic materials that generate fossil-free ammonia through N-recycling from polluted water sources is required. Bimetallic Cu-Pt foam electrodes were synthesized to enhance electrochemical reduction of nitrate (ERN) by the introduction of bimetallic catalytic sites. Electrodes were benchmarked against Cu foam using engineering figures of merit. Cu-Pt (180 s) electrode achieved 94% conversion of NO3--N in 120 min yielding 194.4 mg NH3- N L−1 gcat−1, with a selectivity towards ammonia (SNH3) of 84% and an electrical energy per order decrease by ~70% respect pristine Cu foam. Bimetallic electrodes with low Pt loadings (<0.50 wt%) demonstrated that synergistic effects of Cu-Pt nanointerfaces enabled hybridized mechanisms of catalytic electrochemical and hydrogenation reduction processes. These encouraging outcomes emphasize the potential of Cu-Pt foam electrodes to treat contaminated water sources with nitrate, while allowing a sustainable decentralized ammonia recovery. Enriched water for crops irrigation can therefore be a prospect use for this added value product.
AB - Identifying electrocatalytic materials that generate fossil-free ammonia through N-recycling from polluted water sources is required. Bimetallic Cu-Pt foam electrodes were synthesized to enhance electrochemical reduction of nitrate (ERN) by the introduction of bimetallic catalytic sites. Electrodes were benchmarked against Cu foam using engineering figures of merit. Cu-Pt (180 s) electrode achieved 94% conversion of NO3--N in 120 min yielding 194.4 mg NH3- N L−1 gcat−1, with a selectivity towards ammonia (SNH3) of 84% and an electrical energy per order decrease by ~70% respect pristine Cu foam. Bimetallic electrodes with low Pt loadings (<0.50 wt%) demonstrated that synergistic effects of Cu-Pt nanointerfaces enabled hybridized mechanisms of catalytic electrochemical and hydrogenation reduction processes. These encouraging outcomes emphasize the potential of Cu-Pt foam electrodes to treat contaminated water sources with nitrate, while allowing a sustainable decentralized ammonia recovery. Enriched water for crops irrigation can therefore be a prospect use for this added value product.
KW - Ammonia production
KW - Denitrification
KW - Resource recovery
KW - Selective electrocatalytic reduction
KW - Water treatment
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U2 - 10.1016/j.apcatb.2021.120844
DO - 10.1016/j.apcatb.2021.120844
M3 - Article
AN - SCOPUS:85118502376
SN - 0926-3373
VL - 302
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 120844
ER -