MXene-Regulated Indium-Based Metal–Organic Framework Material for Electrochemical Reduction of CO₂ into Pure Formic Acid Aqueous Solution

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 12, 2025

Electrochemical CO2 reduction reaction provides a mild avenue for resource utilization of CO2. Metal-organic framework (MOF) materials are considered among the promising catalysts due to unique structural advantages. However, catalytic performance MOFs is hindered by poor conductivity, making it crucial enhance charge transfer improved efficiency. Herein, hybrid catalyst was constructed based on In-based porphyrin (In-TCPP) and conducting MXene nanosheets efficient conversion. As expected, as conductive support significantly improves material, achieving Faraday efficiency HCOO- 94.0% with 2.2-fold increase in practical current density. Furthermore, pure formic acid solution concentration ca. 0.22 M prepared via execution solid-state electrolyte-mediated MEA (MEA-SSE) device. Theoretical calculations situ ATR-FTIR spectra reveal that introduction not only endows material metallic properties facilitate but also modulates electronic structure optimize adsorption key intermediate *OCHO. This work enlightens rational design MOF-based electrocatalysts regulation demonstrates promise MEA-SSE device applications.

Language: Английский

Gas‐Phase Conversion Promising Controlled Construction of Functional ZnF₂/V₂CT_x for Stabilizing Zn Metal Anodes Toward Aqueous Zinc‐Ion Batteries

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Abstract The practical application of aqueous zinc‐ion batteries (AZIBs) is impeded by notorious side reactions occurring at the zinc anode including dendrite growth, hydrogen evolution reaction and anodic corrosion. To address these issues, ZnF 2 combined with V C MXene composite (ZnF /V CT x ) in‐situ synthesized from ZnC MAX through a facile gas‐phase fluorination strategy utilized as an efficient protective coating layer for Zn anode. ionically conductive hydrophobic inhibits promotes uniform distribution migration 2+ . Meanwhile, electronically effectively homogenizes electric field reduces local current density. Consequently, stable, dendrite‐free excellent cycling stability (over 2100 h 3.0 mA cm −2 achieved. Furthermore, not only significantly improves reversibility deposition/stripping, but efficiently electrochemical polarization. When paired vanadate (Zn O 7 ZnV 3 8 cathode derived directly oxidation ZnC, full cells exhibit 1000‐cycle lifespan 5.0 A g −1 , superior rate performance (≈237.6 mAh 10.0 ). This work presents novel to controllably construct phase derivatives next‐generation AZIBs.

Language: Английский

Polysulfide-mediating properties of nickel phosphide carbon composite nanofibers as free-standing interlayers for lithium–sulfur batteries

RSC Advances, Journal Year: 2024, Volume and Issue: 14(49), P. 36593 - 36601

Published: Jan. 1, 2024

Ni x P/C fiber mat interlayers with tailored surface oxidation layers exhibit strong polysulfide adsorption and catalytic conversion, enhancing lithium–sulfur cell stability by up to 200 cycles at 2C a discharge capacity of ∼800 mA h g −1 .

Language: Английский