Experimental studies on the catalytic behavior of alloy and core-shell supported Co-Ni bimetallic nano-catalysts for hydrogen generation by hydrolysis of sodium borohydride

Didehban, Amirhossein; Zabihi, Mohammad; Shahrouzi, Javad Rahbar

doi:10.1016/j.ijhydene.2018.09.127

Cited by 63 publications

(11 citation statements)

References 58 publications

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“…The characterization of the Co 3 O 4 powder was conducted by XRD analysis. The XRD pattern exhibited a regular hexahedron composed of Co 3 O 4 (Figure S7); however, the presence of CoOOH as the by‐product was also indicated [44,45] . In addition, the TEM image of Co 3 O 4 was obtained (Figure S8), providing evidence for the formation of fine particles of Co 3 O 4 in the order of ca.…”

Section: Resultsmentioning

confidence: 95%

A Water‐Splitting System with a Cobalt (II,III) Oxide Co‐Catalyst‐Loaded Bismuth Vanadate Photoanode Along with an Organo‐Photocathode

et al. 2020

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In the water‐splitting reaction, the oxidation of water to O2 is considered to be a kinetically demanding process, so that a co‐catalyst has been usually applied to promote water oxidation. This work demonstrates that, when loading mixed‐valence cobalt (II,III) oxide (Co3O4) dispersed in a Nafion membrane (Nf) on a nanoporous bismuth vanadate (BiVO4) photoanode (i. e., BiVO4/Nf[Co3O4]), stable and efficient water oxidation occurred. In particular, it is noteworthy that the BiVO4/Nf[Co3O4] photoanode exhibited stable performance even in an acidic medium (pH=2). In the present system consisting of a BiVO4/Nf[Co3O4] photoanode along with an organo‐photocathode, the stoichiometric formation of O2 and H2 successfully occurred by applying just 0.1 V between the photoelectrodes (cf. maximum efficiency, ca. 0.2 %), which was superior to the prototype comprising BiVO4 and Pt counter electrode. The Co3O4 loading can effectively suppress the collapse of the nanostructured BiVO4 upon photocorrosion, resulting in the stable and kinetically efficient consumption of holes in BiVO4.

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Section: Resultsmentioning

confidence: 95%

A Water‐Splitting System with a Cobalt (II,III) Oxide Co‐Catalyst‐Loaded Bismuth Vanadate Photoanode Along with an Organo‐Photocathode

et al. 2020

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“…Therefore, with increasing temperature the rate of hydrolysis increases 76 . Additionally, the viscosity of the solution decreases with increasing reaction temperature so the flow resistance of the solution decreases causing an increase in the interaction between the reactant molecules increasing the reaction rates 77,78 …”

Section: Resultsmentioning

confidence: 99%

Investigation of hydrogen production from sodium borohydride by carbon nanotube‐graphenesupportedPdRubimetallic catalyst forPEMfuel cell application

Al-Msrhad

Devrim

Uzundurukan

et al. 2021

Intl J of Energy Research

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Summary In this study, hydrogen (H2) generation from the hydrolysis of sodium borohydride (NaBH4) catalyzed by bimetallic Palladium‐Ruthenium (PdRu) supported on multiwalled carbon nanotube‐graphene (MWCNT‐GNP) hybrid material is investigated. The effect of various parameters such as temperature, NaBH4 concentration, and catalyst loading and effect of base concentration are examined to observed optimum operating conditions. Experimental results show that the PdRu/MWCNT‐GNP bimetallic catalyst has high catalytic activity on NaBH4 hydrolysis reaction. It has been found that PdRu/MWCNT‐GNP catalyst shows low activation energy of 22.33 kJ/mol for hydrolysis reaction of NaBH4. The PdRu/MWCNT‐GNP catalyst also exhibits H2 generation rate of 79.2 mmol/min·gcat at 45°C. It shows good cycle stability in the catalyst reusability test and retained 89% of its initial catalytic activity after fifth use. The high catalytic activity of the PdRu/MWCNT‐GNP catalyst makes it promising in H2 generation from NaBH4 hydrolysis for commercial proton exchange membrane fuel cell (PEMFC) applications.

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“…The used AC as a substrate derived from the walnut hard shell was activated by the physical method under the steam flow at 800°C, as given in the previous work (Didehban et al, 2018).…”

Section: Methodsmentioning

confidence: 99%

Synthesis of the magnetic core–shell bi‐metallic and tri‐metallic metal–organic framework nanocomposites for dye adsorption

Akbarbandari

Zabihi

Faghihi

2020

Water Environment Research

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Bi‐metallic and tri‐metallic metal–organic frameworks (MOFs) supported on the magnetic activated carbon (MAC) were synthesized for the reduction of methylene blue (MB) concentration in the aqueous solutions. The adsorbent nanocomposites were characterized by applying the general tests including XRD, FTIR, FESEM, TEM, BET, and VSM. The XRD achievements demonstrated that crystalline structure of MOFs was derived on the MAC by the presented method. The core–shell morphology with nano‐scale size of the magnetic carbonaceous MOFs was detected in TEM and FESEM micro‐images. The acceptable magnetic strength of the prepared adsorbents was proved by using the VSM analysis. The important operating conditions including pH and temperature were also evaluated, while the other parameters were kept constant. The pseudo‐second‐order kinetic model was matched with the experimental data to show the kinetic behavior of the multi‐component MOFs. The isotherm studies showed that the good agreement between the experimental data with both Langmuir model and the maximum capacities was calculated to be about 66.51 and 71.43 mg/g for the bi‐metallic and tri‐metallic nanocomposites, respectively. Regeneration experiments indicated that the fabricated adsorbents have an excellent reusing adsorption capacity which can be a proper selection for the industrial applications. Practitioner points Bi‐metallic and tri‐metallic MOFs supported on the magnetic activated carbon were synthesized by the facile preparation method. Adsorption of methylene blue by using MOFs were successfully done. Nanocomposites were evaluated by XRD, FTIR, BET, FESEM, TEM, and VSM techniques. Maximum of adsorption capacity was observed for tri‐metallic MOF as 71.43 mg/g.

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Experimental studies on the catalytic behavior of alloy and core-shell supported Co-Ni bimetallic nano-catalysts for hydrogen generation by hydrolysis of sodium borohydride

Cited by 63 publications

References 58 publications

A Water‐Splitting System with a Cobalt (II,III) Oxide Co‐Catalyst‐Loaded Bismuth Vanadate Photoanode Along with an Organo‐Photocathode

A Water‐Splitting System with a Cobalt (II,III) Oxide Co‐Catalyst‐Loaded Bismuth Vanadate Photoanode Along with an Organo‐Photocathode

Investigation of hydrogen production from sodium borohydride by carbon nanotube‐graphenesupportedPdRubimetallic catalyst forPEMfuel cell application

Synthesis of the magnetic core–shell bi‐metallic and tri‐metallic metal–organic framework nanocomposites for dye adsorption

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