Synthesis of CaCO3/Cu2O/GO Nanocomposite Catalysts for Hydrogen Production from NaBH4 Methanolysis

Alshammari, Majed; Alhassan, Sultan; Alshammari, Khulaif; Alotaibi, Turki; Taha, T.A.; Alshammari, Alhulw H.; Ismael, Ali K.

doi:10.3390/catal13061010

Cited by 11 publications

(2 citation statements)

References 74 publications

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“…A catalyst with a higher hydrogen generation rate is a more efficient catalyst. The hydrogen volume ( V ), the mass of the catalyst ( m cat ), and time ( t ) are used to estimate the hydrogen generation rate ( r ) from the following equation [ 93 ]:

…”

Section: Resultsmentioning

confidence: 99%

A High-Performance Cr2O3/CaCO3 Nanocomposite Catalyst for Rapid Hydrogen Generation from NaBH4

Alshammari,

Alhassan

et al. 2024

Nanomaterials

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This study aims to prepare new nanocomposites consisting of Cr2O3/CaCO3 as a catalyst for improved hydrogen production from NaBH4 methanolysis. The new nanocomposite possesses nanoparticles with the compositional formula Cr2−xCaxO3 (x = 0, 0.3, and 0.6). These samples were prepared using the sol-gel method, which comprises gelatin fuel. The structure of the new composites was studied using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, environmental scanning electron microscopy (ESEM), and X-ray spectroscopy (XPS). The XRD data showed the rhombohedral crystallinity of the studied samples, and the average crystal size was 25 nm. The FTIR measurements represented the absorption bands of Cr2O3 and CaO. The ESEM micrographs of the Cr2O3 showed the spherical shape of the Cr2O3 nanoparticles. The XPS measurements proved the desired oxidation states of the Cr2−xCaxO3 nanoparticles. The optical band gap of Cr2O3 is 3.0 eV, and calcium doping causes a reduction to 2.5 and 1.3 eV at 15.0 and 30.0% doping ratios. The methanolysis of NaBH4 involved accelerated H2 production when using Cr2−xCaxO3 as a catalyst. Furthermore, the Cr1.7Ca0.3O3 catalyst had the highest hydrogen generation rate, with a value of 12,750 mL/g/min.

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…”

Section: Resultsmentioning

confidence: 99%

A High-Performance Cr2O3/CaCO3 Nanocomposite Catalyst for Rapid Hydrogen Generation from NaBH4

Alshammari,

Alhassan

et al. 2024

Nanomaterials

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“…Additionally, Alshammari synthesized the CaCO 3 /Cu 2 O/GO nanocomposites by the sol-gel autocombustion method. 148 Among them, the increase of Ca content accelerated the methanolysis of SB. The HGR of optimized Cu 1.4 Ca 0.6 O/GO for the SB methanolysis was 9809 mL min −1 g −1 at 298 K. Bekirogullari developed and applied a new microalgae-based support material, which was modified from the chlorella vulgaris microalgal strain by treating the algal biomass with H 3 PO 4 for a proton-binding process (CVMS-H 3 PO 4 ) and used as support for stabilizing Cu-B NPs.…”

Section: Cu-based Catalysts In the Methanolysis Of Sbmentioning

confidence: 99%

Hydrogen production from chemical hydrogen storage materials over copper‐based catalysts

Long,

Wu,

Liu

et al. 2024

cMat

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Hydrogen, as a clean and efficient energy source, is one of the important energy carriers in the future. However, the safe storage and delivery of hydrogen is still a bottleneck in its practical applications. Chemical hydrides (such as NaBH4, NH3BH3, N2H4·H2O, N2H4BH3, and HCOOH) are considered as potential chemical hydrogen storage materials that can achieve rapid on‐site hydrogen production. At present, the most critical issue for them is to develop economic catalysts to achieve efficient hydrogen production from chemical hydrides. Copper (Cu) is considered as a promising catalyst that is one of the most reactive metals among the first‐row transition metals and economically cheap. In this review, we outline the recent advancements of Cu‐based catalysts in catalyzing hydrogen production from chemical hydrides. Moreover, the synthesis methods, characterization techniques, and hydrogen production catalytic activity of Cu‐based catalysts were also introduced. Finally, a brief conclusion and outlook are given for the application of Cu‐based catalysts in the dehydrogenation of chemical hydrides. We hope that this review will stimulate interest in the promising research area of Cu‐based catalysts for the dehydrogenation of chemical hydrides.

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Preparation of nanocellulose/reduced graphene oxide matrix loaded with cuprous oxide nanoparticles for efficient catalytic reduction of 4‐nitrophenol

Khili,

Omrani

2024

Biopolymers

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The paper reports on the preparation of cellulose nanocrystals/reduced graphene oxide matrix loaded with cuprous oxide nanoparticles (CNC/rGO‐Cu2O) through a simple solvothermal method and its application for 4‐nitrophenol reduction to 4‐aminophenol using sodium borohydride. The CNC/rGO‐Cu2O nanocomposite was formed chemically by first mixing CNC and graphene oxide (GO) followed by complexation of the negatively charged functional groups of CNC/GO with Cu2+ ions and subsequent heating at 100°C. This resulted in the simultaneous reduction of GO to rGO and the formation of Cu2O nanoparticles. The as‐elaborated nanocomposite was firstly characterized using different techniques such as atomic force microscopy, scanning electron microscopy, transmission electron microscopy, UV–Vis spectrophotometry, Raman spectroscopy and x‐ray photoelectron spectroscopy. Then, it was successfully applied for efficient catalytic reduction of 4‐nitrophenol to 4‐aminophenol using sodium borohydride: the reduction was completed in about 6 min. After eight times use, the catalyst still maintained good catalytic performance. Compared to CNC/rGO, rGO/Cu2O and free Cu2O nanoparticles, the CNC/rGO‐Cu2O nanocomposite exhibits higher catalytic activity even at lower copper loading.

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Synthesis of CaCO3/Cu2O/GO Nanocomposite Catalysts for Hydrogen Production from NaBH4 Methanolysis

Cited by 11 publications

References 74 publications

A High-Performance Cr2O3/CaCO3 Nanocomposite Catalyst for Rapid Hydrogen Generation from NaBH4

A High-Performance Cr2O3/CaCO3 Nanocomposite Catalyst for Rapid Hydrogen Generation from NaBH4

Hydrogen production from chemical hydrogen storage materials over copper‐based catalysts

Preparation of nanocellulose/reduced graphene oxide matrix loaded with cuprous oxide nanoparticles for efficient catalytic reduction of 4‐nitrophenol

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