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oai:figshare.com:article/34027545 2026-09-29T20:07:25Z category_146 category_8 category_272 category_873 category_46 category_734 portal_63 item_type_6 month_year_09_2026

Cobalt Tritolylcarboxy Porphyrin-Carbon Black Composite Bifunctional Electrocatalyst for Nitrate and Carbon Dioxide Electroreduction to Ammonia and Formic/Acetic Acid Kamal Dhakal (3917246) Alankar Kafle (14435897) Swatej Sabbarwal (24286589) Dili R. Subedi (25138803) Mohammad K. Altafi (20314320) Alireza Hajiseyedjavadi (25138806) Sayan Maiti (4169263) Shengqian Ma (1348764) Thomas R. Cundari (628766) Francis D’Souza (1559515) Space Science Microbiology Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Immunology Biological Sciences not elsewhere classified substituted cobalt tetrakis high faradaic efficiency examined cobalt porphyrins environmental remediation tools developing highly active carbon dioxide electroreduction substituted cobalt porphyrin cobalt tritolylcarboxy porphyrin carboxylic acid group − cooh group 3 </ sub 2 </ sub independently produce ammonia porphyrin showed acetic acid various potentials pollution control electrode materials efficient electrocatalysts effective way different modifications circular economy Electrochemical nitrate reduction reaction (NO₃RR) and carbon dioxide reduction reactions (CO₂RR) can serve as environmental remediation tools for pollution control and thus support a circular economy for sustainability. The electrochemical process relies heavily on electrode materials; thus, developing highly active and efficient electrocatalysts for these reactions in a green and cost-effective way is essential. In this study, we examined cobalt porphyrins with different modifications for electrochemical NO₃RR and CO₂RR to independently produce ammonia and acetic acid/formic acid. The carboxylic acid group-substituted cobalt tetrakis(p-tolyl) porphyrin showed a high Faradaic efficiency of 94% for ammonia, 33.8% for CH₃COOH, and 21.1% for HCOOH at various potentials in a neutral pH (∼7) electrolyte. Computational results suggest enhanced binding of key NO₃RR and CO₂RR intermediates to the −COOH group-substituted cobalt porphyrin during electrocatalysis. 2026-09-29T00:00:00Z Text Journal contribution 10.1021/acs.chemmater.6c00705.s001 https://figshare.com/articles/journal_contribution/Cobalt_Tritolylcarboxy_Porphyrin-Carbon_Black_Composite_Bifunctional_Electrocatalyst_for_Nitrate_and_Carbon_Dioxide_Electroreduction_to_Ammonia_and_Formic_Acetic_Acid/34027545 CC BY-NC 4.0