Enhanced performance of urea electro-oxidation in alkaline media on PtPdNi/C, PtNi/C, and Ni/C catalysts synthesized by one-pot reaction from organometallic precursors

A facile, one-pot solvent-mediated hydrothermal process was adopted to prepare nickel sulfide nanoparticles decorated on reduced graphene oxide (NixSy/rGO) as electrocatalysts for hydrogen evolution reaction (HER). The designed solvent (ethylene glycol and deionized water) played a decisive role in controlling both crystalline phase and morphology of NixSy/rGO composites, leading to pure [Formula: see text]-NiS nanoparticles uniformly distributed on rGO sheets under suitable volume ratio of ethylene glycol and deionized water (2:1). The optimized [Formula: see text]-NiS/rGO showed prominent HER catalytic performance with a rather small Tafel slope of 93[Formula: see text]mV/decade and prominent current density of 10[Formula: see text]mA/cm2 at the overpotential of 177[Formula: see text]mV in alkaline environments when compared to pristine [Formula: see text]-NiS and NiS2/rGO catalysts. The excellent catalytic performance and long-term durability even after 8000 cycles confirmed the potential of [Formula: see text]-NiS/rGO composites as efficient electrocatalysts for HER in the alkaline media.

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Cobalt selenide nanoflake decorated reduced graphene oxide nanocomposite for efficient glucose electro-oxidation in alkaline medium

Journal of Materials Chemistry A ◽

10.1039/c7ta04742h ◽

2017 ◽

Vol 5 (36) ◽

pp. 19289-19296 ◽

Cited By ~ 12

Author(s):

M. C. Dilusha Cooray ◽

Xiaolong Zhang ◽

Ying Zhang ◽

Steven J. Langford ◽

Alan M. Bond ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Alkaline Medium ◽

Hybrid Material ◽

Glucose Oxidation ◽

One Pot ◽

Reduced Graphene ◽

Electro Oxidation ◽

Cobalt Selenide

A simple one pot hydrothermal procedure for the synthesis of cobalt selenide (CoSe) decorated reduced graphene oxide (rGO) is reported along with the application of this hybrid material as a new electrocatalyst for glucose oxidation.

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ELECTRO-OXIDATION OF ETHANOL ON NANOCRYSTALLINE Pd/C CATALYST PROMOTED WITH OXIDE IN ALKALINE MEDIA

International Journal of Nanoscience ◽

10.1142/s0219581x09005864 ◽

2009 ◽

Vol 08 (01n02) ◽

pp. 203-207 ◽

Cited By ~ 4

Author(s):

J. L. LU ◽

CHANGWEI XU ◽

SAN PING JIANG

Keyword(s):

High Surface ◽

Carbon Support ◽

Alkaline Media ◽

Particle Sizes ◽

Linear Sweep ◽

Direct Ethanol Fuel Cells ◽

Oxidation Activity ◽

Microstructure Change ◽

Electro Oxidation ◽

Oxidation Of Ethanol

Nanocrystalline Pd electrocatalyst promoted with transition metal oxide ( Co 3 O 4, NiO , and CoNiO x) is successfully synthesized on high surface carbon support by using intermittent microwave heating (IMH) method. The physical properties of the catalysts are characterized by XRD, TEM, and EDX. The results show that there is no significant microstructure change between Pd and Pd -oxide electrocatalysts and the particle sizes are in the range 5.8–3.9 nm. The linear sweep voltammogram and chronoamperometry results for the electro-oxidation of ethanol show that Pd -oxide/ C electrocatalysts exhibit much better electrochemical activity and stability as compared with pure Pd / C electrocatalyst. The results show that Pd – CoNiO x/ C exhibits the best stability and highest electro-oxidation activity, indicating the promising potential as an alternative electrocatalysts for the direct ethanol fuel cells.

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