Dynamic Restructuring of Electrocatalysts in the Activation of Small Molecules: Challenges and Opportunities

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Structural transformation of electrocatalyst contributes to its catalytic activity and selectivity. Properly guided stabilized offers enhanced catalyst performance, while unregulated surface reconstruction may lead deactivation.

Language: Английский

---

Direct low concentration CO2 electroreduction to multicarbon products via rate-determining step tuning

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Nov. 29, 2024

Direct converting low concentration CO2 in industrial exhaust gases to high-value multi-carbon products via renewable-energy-powered electrochemical catalysis provides a sustainable strategy for utilization with minimized separation and purification capital energy cost. Nonetheless, the electrocatalytic conversion of dilute into value-added chemicals (C2+ products, e.g., ethylene) is frequently impeded by rate weak carbon intermediates' surface adsorption strength. Here, we fabricate range Cu catalysts comprising fine-tuned Cu(111)/Cu2O(111) interface boundary density crystal structures aimed at optimizing rate-determining step decreasing thermodynamic barriers adsorption. Utilizing engineering, attain Faradaic efficiency (51.9 ± 2.8) % partial current (34.5 6.4) mA·cm−2 C2+ feed condition (5% v/v), comparing state-of-art electrolysis. In contrast prevailing belief that activation ( $${{CO}}_{2}+{e}^{-}+\, * \,\to {}^{ }{CO}_{2}^{-}$$ ) governs reaction rate, discover that, under conditions, shifts generation *COOH $${}^{ } {{CO}}_{2}^{-}+{H}_{2}O\to {COOH}+{{OH}}^{-}({aq})$$ Cu0/Cu1+ boundary, resulting better production performance. The development operate resembling waste holds promise reduction. authors report vacuum calcination approach regulating on Cu-based can electro-catalyze low-concentration CO2.

Language: Английский

---

Low-temperature CO2 methanation over SiO2 supported Ni catalysts derived from sol-gel precursors: Effect of pretreatment process

Fuel, Journal Year: 2025, Volume and Issue: 390, P. 134651 - 134651

Published: Feb. 17, 2025

Language: Английский

---

Gram‐Scale Preparation of Tri‐Coordinated Single‐Atom Catalysts for CO₂ Electrolysis in Large‐Scale Membrane Electrode Assembly

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract Accelerating the commercialization of CO 2 electroreduction is essential for carbon utilization, yet it faces challenges precious metal catalysts cost and scaling‐up corresponding devices. In this study, a low‐cost tri‐coordinated single‐atom catalyst (SAC) with Ni‐N3 center fabricated in gram‐scale using ionic liquids as precursor. The SAC (g‐NiN3) achieves efficient to (eCO ‐to‐CO) maximum Faradaic efficiency 98.9% at 2.8 V × cm membrane electrode assembly (MEA) cell, selectivity exceeds 90% during 100 h electrolysis mA·cm −2 . Moreover, g‐NiN3 tested scale‐up MEA reactor (10 10 ), which can not only show 97.1% reaction current 6.07 A but also single‐pass conversion 41.0%, energy system high 43.1%. overall performance one state‐of‐the‐art systems eCO ‐to‐CO. addition, device stably generates rate 12.0 L·kW·h −1 over continuous electrolysis. techno‐economic assessment demonstrates that ‐to‐CO realize production 1.08 $·kg , shows great profitability prospects future.

Language: Английский

---

Electrochemical valorization of captured CO₂: recent advances and future perspectives

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 10, 2024

The excessive emission of CO

Language: Английский

---