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Catalytic combo converts CO2 to solid carbon nanofibers

Scientists at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory and Columbia University have developed a way to convert carbon dioxide (CO2), a potent greenhouse gas, into carbo . ....

Jingguang Chen , Zhenhua Xie , Sooyeon Hwang , National Synchrotron Light Source , Brookhaven Lab , Brookhaven Chemistry Division , Quickx Ray Absorption , Inner Shell Spectroscopy , Electron Microscopy , Functional Nanomaterials , Ping Liu , Chemistry Division , Carbon Dioxide , Carbon Nanofibers , Electrochemical Reactions , Carbon Emissions , Carbon Nanotubes , Density Functional Theory , Transmission Electron Microscopy , X Ray Diffraction Analysis ,

"Regulating the intrinsic electronic structure of carbon nanofibers wit" by Zhijia Zhang, Gang Xie et al.

Carbon nanofibers (CNFs) with high specific surface area show great potential for sodium storage as a hard carbon material. Herein, CNFs anchored with Ni nanoparticles (CNFs/Ni) were prepared through chemical vapor deposition and impregnation reduction methods, in situ growing on the three-dimensional porous copper current collector (3DP-Cu). The coupling effect of high-spin state Ni nanoparticles leads to the increase of defect density and the expansion of lattice spacing of CNFs. Meanwhile, the 3DP-Cu ensures a high loading capacity of CNFs and short ion/electron transport channels. As an integral binder-free anode, the 3DP-Cu/CNFs/Ni exhibits excellent electrochemical performance, which demonstrates a high specific capacity with 298.5 mAh g–1 at 1000 mA g–1 after 1500 cycles, and a high power density with 200 mAh g–1 over 1000 cycles at 5000 mA g–1. Density functional theory calculation results show that the high-spin state Ni regulates the electronic structure of CNFs, whic ....

Anode Materials , Carbon Nanofibers , Ensity Functional Theory Calculation , Igh Spin State , Bi Nanoparticles , Sodium Ion Batteries ,

Green Alchemy: Catalytic Combo Transforms CO2 to Solid Carbon Nanofibers

Tandem electrocatalytic-thermocatalytic conversion could help offset emissions of potent greenhouse gas by locking carbon away in a useful material. Scientists at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory and Columbia University have developed a way to convert carbon di ....

Jingguang Chen , Sooyeon Hwang , Feco Ce , Zhenhua Xie , Lawrence Berkeley National Laboratory , Brookhaven Lab , Nanomaterials Brookhaven National Laboratory , Brookhaven Chemistry Division , National Synchrotron Light Source , Columbia University , Us Department Of Energy , Office Of Science , Erwei Huang Brookhaven National Laboratory , National Energy Research Scientific Computing Center , Zhenhua Xie Brookhaven National Laboratory , Brookhaven National Laboratory , Catalytic Process Artistic Rendering , Brookhaven National , Nature Catalysis , Process Schematic , Carbon Nanofibers , Quickx Ray Absorption , Inner Shell Spectroscopy , Electron Microscopy , Functional Nanomaterials , Ping Liu ,

"Modulating p-d orbital hybridization by CuO/Cu nanoparticles enables c" by Zhi Jia Zhang, He Yi Sun et al.

Carbon nanofibers (CNFs) have been extensively studied as anode materials for sodium-ion batteries due to their high conductivity, large aspect ratio and good electrochemical stability. The low specific capacity and low first cycle efficiency of CNFs, however, have hindered its practical application. Herein, we present a facile strategy to synthesize a novel CNFs decorated with Cu/CuO nanoparticles (Cu-CNFs) using magnetron sputtering method. Cu/CuO nanoparticles were uniformly distributed on the surface of CNFs. According to the density functional theory (DFT) calculation, Cu/CuO nanoparticles d-orbitals and CNFs p-orbitals present hybridization states, and the Na+ adsorption energy of the modified CNFs decreases from − 2.14 to − 2.97 eV. The Cu-CNFs composites exhibit excellent sodium storage properties, presenting a desirable initial Coulombic efficiency of 76% and a high specific reversible capacity of 300 mAh·g−1 at 0.1 A·g−1 after 400 cycles. Cu-CNFs anode has excellent ....

Carbon Nanofibers , U Cuo Nanoparticles , Ensity Functional Theory Calculation , Magnetron Sputtering , Rbital Hybridization ,

Will Graphene Be Used in Electric Vehicles (EVs)?

Graphene's large surface area allows for a higher number of active sites, facilitating greater electrochemical reactions and increasing energy storage capacity in graphene EV batteries. ....

Trifunctional Co , Energy Storage , Graphene Be Used , Electric Vehicles , Flexible Graphene , Industry Focus , Carbon Nanofibers , Molybdenum Disulfide , Future Outlook , Raphene In Evs , Electric Vehicle ,