Fe-MOF Catalytic Nanoarchitectonic toward Electrochemical Ammonia Production

Fe-MOF Catalytic Nanoarchitectonic toward Electrochemical Ammonia Production

Článek WoS

Electrochemical reduction of nitrate into ammonia has lately been identified as one among the promising solutions to address the challenges triggered by the growing global energy demand. Exploring newer electrocatalyst materials is vital to make this process effective and feasible. Recently, metal-organic framework (MOF)-based catalysts are being well investigated for electrocatalytic ammonia synthesis, accounting for their enhanced structural and compositional integrity during catalytic reduction reactions. In this study, we investigate the ability of the PCN-250-Fe-3 MOF toward ammonia production in its pristine and activated forms. The activated MOF catalyst delivered a faradaic efficiency of about 90% at -1 V vs RHE and a yield rate of 2.5 x 10(-4) mol cm(-2) h(-1), while the pristine catalyst delivered a 60% faradaic efficiency at the same potential. Theoretical studies further provide insights into the nitrate reduction reaction mechanism catalyzed by the PCN-250-Fe-3 MOF catalyst. In short, simpler and cost-effective strategies such as pretreatment of electrocatalysts have an upper hand in aggravating the intrinsic material properties, for catalytic applications, when compared to conventional material modification approaches.

Electrochemical reduction of nitrate into ammonia has lately been identified as one among the promising solutions to address the challenges triggered by the growing global energy demand. Exploring newer electrocatalyst materials is vital to make this process effective and feasible. Recently, metal-organic framework (MOF)-based catalysts are being well investigated for electrocatalytic ammonia synthesis, accounting for their enhanced structural and compositional integrity during catalytic reduction reactions. In this study, we investigate the ability of the PCN-250-Fe-3 MOF toward ammonia production in its pristine and activated forms. The activated MOF catalyst delivered a faradaic efficiency of about 90% at -1 V vs RHE and a yield rate of 2.5 x 10(-4) mol cm(-2) h(-1), while the pristine catalyst delivered a 60% faradaic efficiency at the same potential. Theoretical studies further provide insights into the nitrate reduction reaction mechanism catalyzed by the PCN-250-Fe-3 MOF catalyst. In short, simpler and cost-effective strategies such as pretreatment of electrocatalysts have an upper hand in aggravating the intrinsic material properties, for catalytic applications, when compared to conventional material modification approaches.

metal-organic framework; PCN-250-Fe-3; ammonia synthesis; thermal activation; electrochemical nitrate reduction; electrocatalysts

metal-organic framework; PCN-250-Fe-3; ammonia synthesis; thermal activation; electrochemical nitrate reduction; electrocatalysts

KANDAMBATH PADINJAREVEETIL, A.; PERALES RONDON, J.; ZAORALOVÁ, D.; OTYEPKA, M.; ALDUHAISH, O.; PUMERA, M.

2024

02.10.2023

American Chemical Society

WASHINGTON

1944-8252

ACS Applied Materials & Interfaces

15

40

Spojené státy americké

47294

47306

13

https://pubs.acs.org/doi/10.1021/acsami.3c12822

http://hdl.handle.net/11012/245093

padinjareveetil-et-al-2023-fe-mof-catalytic-nanoarchitectonic-toward-electrochemical-ammonia-production