PMID- 31459465
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20231013
IS  - 2470-1343 (Electronic)
IS  - 2470-1343 (Linking)
VI  - 4
IP  - 1
DP  - 2019 Jan 31
TI  - Highly Efficient Hybrid Ni/Nitrogenated Graphene Electrocatalysts for Hydrogen 
      Evolution Reaction.
PG  - 2206-2216
LID - 10.1021/acsomega.8b02895 [doi]
AB  - Two nickel/nitrogenated graphene hybrid electrodes (Ni-NrGO (NH3) and Ni-NrGO 
      (APTES) ) were synthesized, and their catalytic activity with respect to the 
      hydrogen evolution reaction (HER) in alkaline media was analyzed. Incorporation 
      of nitrogen to the carbon structure in graphene oxide (GO) or reduced GO (rGO) 
      flakes in aqueous solutions was carried out based on two different 
      configurations. NrGO (NH (3) ) particles were obtained by a hydrothermal method 
      using ammonium hydroxide as the precursor, and NGO (APTES) particles were 
      obtained by silanization (APTES functionalization) of GO sheets. Aqueous 
      dispersions containing NrGO (NH (3) ) and NGO (APTES) particles were added to the 
      traditional nickel Watts plating bath in order to prepare the Ni-NrGO (NH (3) ) 
      and Ni-NrGO (APTES) catalysts, respectively. Nickel substrates were coated with 
      the hybrid nickel electrodeposits and used as electrodes for hydrogen production. 
      The Ni-NrGO catalysts show a higher activity than the conventional nickel 
      electrodeposited electrodes, particularly the ones containing APTES molecules 
      because they allow obtaining a hydrogen current density 130% higher than 
      conventional Ni-plated electrodes with a Watts bath in the absence of additives. 
      In addition, both catalysts show a low deactivation rate during the ageing 
      treatment, which is a sign of a longer midlife for the catalyst. Cyclic 
      voltammetry and electrochemical impedance spectroscopy measurements were used for 
      examination of the catalytic efficiency of hybrid Ni-NrGO electrodes for HER in 
      KOH solution. High values of exchange current densities, 8.53 x 10(-4) and 2.53 x 
      10(-5) mA cm(-2) for HER in alkaline solutions on Ni-NrGO (NH (3) ) and Ni-NrGO 
      (APTES) electrodes, respectively, were obtained.
FAU - Gomez, Melisa J
AU  - Gomez MJ
AD  - INFIQC-CONICET, Departamento de Fisicoquimica-Facultad de Ciencias Quimicas, 
      Universidad Nacional de Cordoba, Ciudad Universitaria, 5000 Cordoba, Argentina.
FAU - Loiacono, Antonella
AU  - Loiacono A
AD  - INFIQC-CONICET, Departamento de Fisicoquimica-Facultad de Ciencias Quimicas, 
      Universidad Nacional de Cordoba, Ciudad Universitaria, 5000 Cordoba, Argentina.
FAU - Perez, Luis A
AU  - Perez LA
AD  - INFIQC-CONICET, Departamento de Fisicoquimica-Facultad de Ciencias Quimicas, 
      Universidad Nacional de Cordoba, Ciudad Universitaria, 5000 Cordoba, Argentina.
FAU - Franceschini, Esteban A
AU  - Franceschini EA
AD  - INFIQC-CONICET, Departamento de Fisicoquimica-Facultad de Ciencias Quimicas, 
      Universidad Nacional de Cordoba, Ciudad Universitaria, 5000 Cordoba, Argentina.
FAU - Lacconi, Gabriela I
AU  - Lacconi GI
AD  - INFIQC-CONICET, Departamento de Fisicoquimica-Facultad de Ciencias Quimicas, 
      Universidad Nacional de Cordoba, Ciudad Universitaria, 5000 Cordoba, Argentina.
LA  - eng
PT  - Journal Article
DEP - 20190129
PL  - United States
TA  - ACS Omega
JT  - ACS omega
JID - 101691658
PMC - PMC6648461
COIS- The authors declare no competing financial interest.
EDAT- 2019/08/29 06:00
MHDA- 2019/08/29 06:01
PMCR- 2019/01/29
CRDT- 2019/08/29 06:00
PHST- 2018/10/21 00:00 [received]
PHST- 2019/01/11 00:00 [accepted]
PHST- 2019/08/29 06:00 [entrez]
PHST- 2019/08/29 06:00 [pubmed]
PHST- 2019/08/29 06:01 [medline]
PHST- 2019/01/29 00:00 [pmc-release]
AID - 10.1021/acsomega.8b02895 [doi]
PST - epublish
SO  - ACS Omega. 2019 Jan 29;4(1):2206-2216. doi: 10.1021/acsomega.8b02895. eCollection 
      2019 Jan 31.