Cobalt diselenide nanobelts grafted on carbon fiber felt: an efficient and robust 3D cathode for hydrogen production† †Electronic supplementary information (ESI) available: Experimental section, characterization, electrocatalytic study, and comparison of the literature catalytic parameters of various non-noble 3D HER electrocatalysts. See DOI: 10.1039/c5sc01335f Click here for additional data file.
نویسندگان
چکیده
Design and fabrication of low-cost, highly efficient and robust three-dimensional (3D) hierarchical structure materials for electrochemical reduction of water to make molecular hydrogen is of paramount importance for real water splitting applications. Herein, a 3D hydrogen evolution cathode constructed by in situ growing of cobalt diselenide nanobelts on the surface of commercial carbon fiber felt shows exceptionally high catalytic activity with 141 mV overpotential to afford a current density of 10 mA cm , and a high exchange current density of 5.9 10 2 mA cm . Remarkably, it also exhibits excellent catalytic stability, and could be used for more than 30 000 potential cycles with no decrease in the current density in 0.5 M H2SO4. This easily prepared 3D material with excellent electrocatalytic performance is promising as a realistic hydrogen evolution electrode.
منابع مشابه
Electrochemical maps and movies of the hydrogen evolution reaction on natural crystals of molybdenite (MoS2): basal vs. edge plane activity† †Electronic supplementary information (ESI) available: Movies S1 to S4: spatially resolved LSV-SECCM movies obtained from the electrocatalytic HER on the surface of bulk MoS2. Fig. S1 to S14: XRD, XPS, Raman, SEM and OM characterization of MoS2; SEM images of the nanopipets; WCA measurements; LSVs and Tafel plots obtained from the HER on MoS2. See DOI: 10.1039/c7sc02545a Click here for additional data file. Click here for additional data file. Click here for additional data file. Click here for additional data file. Click here for additional data file.
Department of Chemistry, University of Wa [email protected]; P.R.Unwin@warw School of Chemistry, Australian Resear Electromaterials Science, Monash University Department of Physics, University of Warwi † Electronic supplementary information ( resolved LSV-SECCM movies obtained f surface of bulk MoS2. Fig. S1 to S14 characterization of MoS2; SEM images of LSVs and Tafel plots obtained from...
متن کاملCovalent triazine framework supported non-noble metal nanoparticles with superior activity for catalytic hydrolysis of ammonia borane: from mechanistic study to catalyst design† †Electronic supplementary information (ESI) available: 11B NMR spectra, XRD patterns, results of BET and ICP, XPS spectra, TOF values and activation energies E a of the non-noble metal catalysts, time versus volume of H2, catalytic activities and TEM images of 5% Co/CNT, 3% Co/CNT, 1% Co/CNT, the plot of hydrogen generation rate versus the concentration of Co and AB, kinetic isotope effect and TEM image of 5% Co/CTF-1 after reaction. See DOI: 10.1039/c6sc02456d Click here for additional data file.
متن کامل
Palladium(ii)-catalyzed synthesis of dibenzothiophene derivatives via the cleavage of carbon–sulfur and carbon–hydrogen bonds† †Electronic supplementary information (ESI) available: Experimental procedures and characterization data for all new compounds. See DOI: 10.1039/c5sc04890g Click here for additional data file.
متن کامل
Efficient photocatalytic carbon monoxide production from ammonia and carbon dioxide by the aid of artificial photosynthesis† †Electronic supplementary information (ESI) available: Experimental details, calculations and characterizations. See DOI: 10.1039/c7sc01851g Click here for additional data file.
متن کامل
Distance dependent charge separation and recombination in semiconductor/molecular catalyst systems for water splitting† †Electronic supplementary information (ESI) available: Experimental details, DFT calculations and additional transient absorption measurements. See DOI: 10.1039/c4cc05143b Click here for additional data file.
The photoinduced reduction of three Co electrocatalysts immobilised on TiO2 is 10(4) times faster than the reverse charge recombination. Both processes show an exponential dependence on the distance between the semiconductor and the catalytic core.
متن کامل