Ni-Co nanoparticles immobilized on a 3D Ni foam template as a highly efficient catalyst for borohydride electrooxidation in alkaline medium

Guo, Meisong; Cheng, Yu; Yu, Yanan; Hu, Jingbo

doi:10.1016/j.apsusc.2017.04.193

Cited by 37 publications

(9 citation statements)

References 33 publications

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“…on confirmed these findings172 : Ni fails to completely valorize the BH4fuel and leads to nonnegligible hydrogen escape173 in the course of the BOR.Based on this statement, there have been multiple studies exploring Ni-based (sometimes nanostructured) catalysts for the BOR. Many focused on alloying Ni with other metals, like lanthanum in hydrogen storage alloys,174,175 boron,176 cobalt,177,178 coper, 179 cerium 180 or other rare Earths,181 …”

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confidence: 99%

Recent Advances in the Understanding of Nickel-Based Catalysts for the Oxidation of Hydrogen-Containing Fuels in Alkaline Media

et al. 2020

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Nickel is a very abundant transition metal in the Earth crust, and finds numerous applications in electrochemical processes where metallic Ni or its oxides are thermodynamically stable, particularly in alkaline environments. This contribution addresses electrocatalytic properties of Ni-based catalysts in reactions of fuel oxidation in alkaline media. It firstly details the electrochemical behavior of Ni in alkaline media and approaches to determine the active surface area of Ni electrodes. Secondly, the electrocatalytic activities of Ni-based electrocatalysts for the alkaline hydrogen oxidation reaction are described (an endeavor for the development of anion exchange membrane fuel cells), along with a detailed analysis of the strategies put forward to improve them. It is notably shown that the state of Ni surface (oxidized or reduced) largely determines its electrocatalytic activity. This state of the surface also conveys a pivotal importance regarding the activity of Ni for the oxidation of complex fuels (borohydride, boranes and hydrazine). Finally, emphasis is made on the durability of Ni-based catalysts in alkaline environments. It is shown that in such media, the materials durability of Ni-based electrodes can be high, but this does not necessarily warrant stable electrocatalytic activity, owing to possible deactivation following surface oxide or bulk hydride formation in operation.

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confidence: 99%

Recent Advances in the Understanding of Nickel-Based Catalysts for the Oxidation of Hydrogen-Containing Fuels in Alkaline Media

et al. 2020

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“…42 The where Q (mC) is an area the reduction of PdO peak, the 0.424 (mC/cm 2 ) charge is the reduction charge value associated with a monolayer of PdO, and Pdm is the Pd mass loading (mg). As shown in 20 CV analysis of Pd/CNT and PdCo/CNT exhibited a peak located at approximately À0.35 V during the back scan, connected to the electrocatalytic reaction of the interim product (BH 3 OH À ). 29 The specific and mass activities, maximum current ratios of forward (I f ) and reverse (I r ) scan, I f /I r , and ECSA values of Pd/CNT and PdCo/CNT catalysts are summarized in Table 1.…”

Section: Physical Characterizationmentioning

confidence: 78%

“…NaBH 4 produces sodium metaborate (NaBO 2 − ), water, and 8e − as a result of reaction with OH − in an aqueous alkaline medium (NaOH), as illustrated in Equation (2). 20,21

{NaBH}_{4} \to Na goodbreak+ normalB goodbreak+ {2H}_{2}

…”

Section: Introductionmentioning

confidence: 99%

The characterization and sodium borohydride electrooxidation of novel carbon nanotube supported copromoted Pd as anode catalyst for fuel cell

et al. 2021

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In the present study, the effect of Co addition on Pd is investigated. Pd/CNT and PdCo/CNT catalysts are prepared via the sodium borohydride (SBH, NaBH 4 ) reduction method. The X-ray diffraction, transmission electron microscope, and inductively coupled plasma-mass spectrometry analyses are performed to characterize the PdCo(70-30)/CNT catalyst. These characterization results reveal that Pd/CNT and PdCo/CNT catalysts are prepared successfully.NaBH 4 electrooxidation activities of PdCo/CNT catalysts are examined with electrochemical methods such as cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. PdCo(70-30)/CNT catalyst has 11.52 mA/cm 2 specific activity, 477.18 m 2 /g electrochemical active surface area, and the best electrochemical stability. Pd is a promising catalyst for NaBH 4 electrooxidation reaction.

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“…Foam absorbents composed of interconnected open-cell structures are new-generation materials with outstanding properties that have been extensively investigated, offering potential applications as catalyst supports [ 20 , 21 ], supercapacitors [ 22 , 23 , 24 ], thermal energy storage [ 25 , 26 ], and absorbents [ 27 , 28 , 29 ]. In particular, their hydrophobicity, high absorptive capacity, low density, high porosity and excellent thermal stability make them attractive candidates for oil and organic solvent clean up.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Honeycomb-Like Carbon Foam from Larch Sawdust as Efficient Absorbents for Oil Spills Cleanup and Recovery

Tan

et al. 2018

Materials

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Hydrophobic oil absorbents with interconnected porous structure have been widely used in dealing with the pervasive environmental issue of oil spills. In this work, hydrophobic foams with 3D interconnected porous honeycomb structures of liquefied-larch-based polymer foam (LLB-PF) and its carbonized product liquefied-larch-based carbon foam (LLB-CF) was prepared from larch sawdust waste and used for oil and organics separation. The results revealed that the 3D interconnected and open-cell honeycomb structure of LLB-PF was formed simultaneously during self-foaming, which remained intact even after carbonization. The two ultralight foams, especially LLB-PF, exhibited remarkable oil/water selectivity. The foams exhibited efficient and rapid absorption capacities, not only for oils but also for organic solvents. LLB-PF and LLB-CF could absorb tetrachloromethane and epoxidized soybean oil up to 88 and 153 times their own weight, respectively. The recycle tests showed that LLB-PF and LLB-CF exhibited excellent absorption capacities even after five cycles, demonstrating an excellent cyclability. The high oil and organic solvent absorption performance along with the renewable and low-cost starting materials positions LLB-PF and LLB-CF foams as promising candidates with great potential for oil and organics cleanup.

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Ni-Co nanoparticles immobilized on a 3D Ni foam template as a highly efficient catalyst for borohydride electrooxidation in alkaline medium

Cited by 37 publications

References 33 publications

Recent Advances in the Understanding of Nickel-Based Catalysts for the Oxidation of Hydrogen-Containing Fuels in Alkaline Media

Recent Advances in the Understanding of Nickel-Based Catalysts for the Oxidation of Hydrogen-Containing Fuels in Alkaline Media

The characterization and sodium borohydride electrooxidation of novel carbon nanotube supported copromoted Pd as anode catalyst for fuel cell

Synthesis of Honeycomb-Like Carbon Foam from Larch Sawdust as Efficient Absorbents for Oil Spills Cleanup and Recovery

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