AI Article Synopsis
- - The study focuses on creating efficient electrocatalysts for producing formate through electrochemical CO reduction (CORR) but faces challenges like high overpotential and limited current density.
- - The researchers developed a hierarchical BiOBr structure (CT/h-BiOBr) enhanced with cetyltrimethylammonium bromide (CTAB), which achieved over 90% Faradaic efficiency across a broad potential range and demonstrated impressive current density.
- - CTAB helps optimize performance by creating a CO-rich environment and fine-tuning the electron structure, and the findings shed light on using surfactants in electrocatalysis for large-scale applications.
Article Abstract
Developing efficient electrocatalysts for selective formate production via the electrochemical CO reduction reaction (CORR) is challenged by high overpotential, a narrow potential window of high Faradaic efficiency (FE), and limited current density (). Herein, we report a hierarchical BiOBr (CT/h-BiOBr) with surface-anchored cetyltrimethylammonium bromide (CTAB) for formate-selective large-scale CORR electrocatalysis. CT/h-BiOBr achieves over 90% FE across a wide potential range (-0.5 to -1.1 V) and an industrial-level surpassing 100 mA·cm at -0.7 V. investigations uncover the reconstructed Bi(110) surface as the active phase, with CTAB playing a dual role: its hydrophobic alkyl chains create a CO-enriching microenvironment, while its polar head groups fine-tune the electronic structure, fostering a highly active phase. This work provides valuable insights into the role of surfactants in electrocatalysis and guides the design of electrocatalysts for the large-scale CORR.
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| http://dx.doi.org/10.1021/acsnano.4c06019 | DOI Listing |
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