Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: 99, P. 703 - 711
Published: Aug. 6, 2024
Language: Английский
Science China Materials, Journal Year: 2024, Volume and Issue: 67(3), P. 796 - 803
Published: Feb. 22, 2024
Due to the low efficiency of a single metal Bi in CO2 reduction reaction (CO2RR) formates, enhancing conductivity and yield through surface engineered composites is an alluring approach. In this study, we reconstruct nanoparticles situ growth 3D nanoporous copper structures. Benefiting from conductive network strong interaction between Cu Bi, Fermi level becomes shifted upward resulting Bi@np-Cu displays surprising CO2RR performance. demonstrates formate faradaic 97.7% at potential −0.97 V vs. reversible hydrogen electrode with remarkable current density 82 mA cm−2. Importantly, catalyst also has more than 90% for continuous 40 h. Density function theory calculations reveal that np-Cu effectively modulates electronic states optimizing intermediate adsorption energy leading increased intrinsic activity Bi. This study provides novel perspective on applications metals catalysis.
Language: Английский
Citations
7
Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(32)
Published: May 27, 2024
Abstract The practical application of the electrocatalytic CO 2 reduction reaction (CO RR) to form formic acid fuel is hindered by limited activation molecules and lack universal feasibility across different pH levels. Herein, we report a doping‐engineered bismuth sulfide pre‐catalyst (BiS‐1) that S partially retained after electrochemical reconstruction into metallic Bi for RR formate/formic with ultrahigh performance wide range. best BiS‐1 maintains Faraday efficiency (FE) ~95 % at 2000 mA cm −2 in flow cell under neutral alkaline solutions. Furthermore, catalyst shows unprecedentedly high FE (~95 %) current densities from 100 1300 acidic Notably, density can reach 700 while maintaining above 90 membrane electrode assembly electrolyzer operate stably 150 h 200 . In situ spectra functional theory calculations reveals doping modulates electronic structure effectively promotes formation HCOO* intermediate generation. This work develops efficient stable electrocatalysts sustainable production.
Language: Английский
Citations
6
Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(34)
Published: June 5, 2024
Abstract Bismuth‐based materials have emerged as promising catalysts in the electrocatalytic reduction of CO 2 to formate. However, reasons for reconstruction Bi‐based precursors form bismuth nanosheets are still puzzling, especially formation defective sites. Herein, we prepare with vacancy‐rich defects (V‐Bi NS) by rapidly reconstructing Bi 19 Cl 3 S 27 under negative potential. Theoretical analysis reveals that introduction chlorine induces generation intrinsic electric field precursor, thereby increasing electron transfer rate and further promoting metallization trivalent bismuth. Meanwhile, experimental tests verify has a faster than . The formed V‐Bi NS exhibits up 96 % HCOO − Faraday efficiency 400 mA cm −2 partial current densities, its electrochemical active surface area normalized formate density yield 2.2 times higher those intact (I‐Bi NS). Density functional theory calculations indicate vacancies electron‐rich aggregation reduce activation energy *CO radicals stabilize adsorption key intermediate *OCHO, thus facilitating reaction kinetics production.
Language: Английский
Citations
6
Carbon Neutrality, Journal Year: 2024, Volume and Issue: 3(1)
Published: July 29, 2024
Abstract Electrochemical CO 2 reduction (ECR) to value-added products is regarded as a sustainable strategy mitigate global warming and energy crisis, designing highly efficient robust catalysts essential. In this work, transition metal sulfides (TMS)-decorated CuS microflower-like structures were prepared via the one-pot hydrothermal synthesis method for ECR CO, influence of TMS doping on performance was demonstrated. Characterization performed using XRD, FESEM-EDS, N physisorption, XPS, revealing successful loading TMS, formation architectures generation sulfur vacancies. tests demonstrated that ZnS, Bi S 3 , CdS MoS improved intrinsic activity catalyst. Particularly, -CuS composite catalyst with imperfect petal-like structure showed uniform distribution edge Mo sites, which worked synergistically formed grain boundaries (GBs) undercoordinated vacancy sites in promoting activation, stabilizing * COOH adsorption, facilitating desorption, lowering barrier potential-limiting step selectivity. The achieved maximum selectivity 83.2% at –0.6 V versus reversible hydrogen electrode (RHE) high cathodic energetic efficiency 100%. At potential, maintained stable catalytic during 333-min electrolysis process. findings will offer promising avenue development production from ECR.
Language: Английский
Citations
6
ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(50), P. 58784 - 58793
Published: Dec. 12, 2023
The design and synthesis of high-efficiency electrocatalysts are great practical significance in electrocatalytic water splitting, specifically accelerating the slow oxygen evolution reaction (OER). Herein, a self-supported bismuth-doped NiFe layered double hydroxide (LDH) nanosheet array for splitting was successfully constructed on nickel foam by one-step hydrothermal strategy. Benefiting from abundant active sites two-dimensional nanosheets electronic effect Bi-doped LDH, optimal Bi0.2NiFe LDH electrocatalyst exhibits excellent OER performance basic media. It only requires an overpotential 255 mV to drive 50 mA cm–2 low Tafel slope 57.49 dec–1. calculation density functional theory (DFT) further shows that incorporation Bi into could obviously overcome step H2O adsorption during progress. This work provides simple effective strategy improving LDHs, which is significance.
Language: Английский
Citations
16
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: May 2, 2024
Abstract The electrochemical CO 2 reduction reaction (ECO RR) has emerged as a promising technology for achieving carbon neutralization. Even though considerable efforts are dedicated to gain deep insight into the understanding of ECO RR on mechanism level through density functional theory (DFT) studies, effects solvent molecules and temperature have long been neglected by conventional DFT calculations consequence limitations in current technologies computational power supercomputers. Under this context, lack comprehensive over energy changes derived from only concern free between intermediates arouse an urgent call exploring feasible calculation options toward generalized theoretical study. Here, systematic study is provided via constrained ab initio molecular dynamics (cAIMD) simulations, which water taken consideration guide synthesis single‐atom alloy (SAA) catalyst. Consequently, resultant Pr 0.05 /InBi achieves maximum Faradic efficiency (FE) 96.4% efficacy (EE) 59.41% formate. This work offers novel approach design screening SAA catalysts, presenting foreseeable future accelerating industrial application process RR.
Language: Английский
Citations
5
Journal of Materials Research and Technology, Journal Year: 2024, Volume and Issue: 30, P. 7779 - 7788
Published: May 1, 2024
Language: Английский
Citations
5
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(50)
Published: Aug. 22, 2024
Renewable electricity shows immense potential as a driving force for the carbon dioxide reduction reaction (CO
Language: Английский
Citations
5
Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 479, P. 147735 - 147735
Published: Nov. 30, 2023
Language: Английский
Citations
11
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(34)
Published: June 5, 2024
Bismuth-based materials have emerged as promising catalysts in the electrocatalytic reduction of CO
Language: Английский
Citations
4