Novel methods of stabilization of Raney-Nickel catalyst for fuel-cell electrodes

Al-Saleh, M.A.; Sleem-ur-Rahman,; Kareemuddin, Shaik M. M. J.; Al-Zakri, A.S.

doi:10.1016/s0378-7753(97)02704-3

Cited by 26 publications

(15 citation statements)

References 4 publications

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“…3d and Supplementary Table 1 along with that of Ni/CNT and Ni. The mass activity of our synthesized unsupported Ni nanoparticles (0.28 mA mg Ni −1 ) is comparable to the activities of Raney Ni reported in the literature 27 28 29 30 31 32 . By contrast, the mass activity of the Ni/N-CNT is 33 times as high as the pure Ni nanoparticle, making Ni/N-CNT one of the most active PGM-free catalysts for HOR ( Supplementary Table 2 lists the HOR mass activity of the PGM-free catalyst reported in the literature).…”

Section: Resultssupporting

confidence: 87%

Nickel supported on nitrogen-doped carbon nanotubes as hydrogen oxidation reaction catalyst in alkaline electrolyte

et al. 2016

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The development of a low-cost, high-performance platinum-group-metal-free hydroxide exchange membrane fuel cell is hindered by the lack of a hydrogen oxidation reaction catalyst at the anode. Here we report that a composite catalyst, nickel nanoparticles supported on nitrogen-doped carbon nanotubes, has hydrogen oxidation activity similar to platinum-group metals in alkaline electrolyte. Although nitrogen-doped carbon nanotubes are a very poor hydrogen oxidation catalyst, as a support, it increases the catalytic performance of nickel nanoparticles by a factor of 33 (mass activity) or 21 (exchange current density) relative to unsupported nickel nanoparticles. Density functional theory calculations indicate that the nitrogen-doped support stabilizes the nanoparticle against reconstruction, while nitrogen located at the edge of the nanoparticle tunes local adsorption sites by affecting the d-orbitals of nickel. Owing to its high activity and low cost, our catalyst shows significant potential for use in low-cost, high-performance fuel cells.

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Section: Resultssupporting

confidence: 87%

Nickel supported on nitrogen-doped carbon nanotubes as hydrogen oxidation reaction catalyst in alkaline electrolyte

et al. 2016

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“…One can distinguish several groups of catalytic materials having metallic nickel as the main component. Among them, there are metal-doped-sponge Raney nickel catalysts, − electrochemically deposited bulk double- and ternary-metal catalysts, highly dispersed supported Ni-based catalysts, and single-crystal Ni facets . The first group, Raney nickel catalysts, is the most popular, with the highest number of studies, because of its popularity in liquid electrolyte (KOH)-based alkaline fuel cells.…”

Section: Hor Electrocatalystsmentioning

confidence: 99%

Electrocatalysts for Hydrogen Oxidation Reaction in Alkaline Electrolytes

et al. 2018

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In the past 5 years, advances in anionconductive membranes have opened the door for the development of advanced anion-exchange membrane fuel cells (AEMFCs) as the next generation of affordable fuel cells. Several recent works have shown that AEMFCs currently achieve nearly identical beginning-of-life performance as stateof-the-art proton exchange membrane fuel cells. However, until now, these high AEMFC performances have been reached with platinum-group metal (PGM)-based anode and cathode catalysts. In order to fulfill the potential of AEMFCs, such catalysts should in the near future be free of PGMs and, eventually, free of critical raw materials. Although great progress has been achieved in the development of PGM-free catalysts for the oxygen reduction reaction in basic media, significantly less attention has been paid to the catalysis of the hydrogen oxidation reaction (HOR). The much lower HOR activity of Pt in basic media compared with that in acid was itself revealed only relatively recently. While several PGM-based composite materials have shown improved HOR activity in basic media, the HOR kinetics remains slower than necessary for an ideal nonpolarizable electrode. In addition, attempts to move away from PGMs have hitherto resulted in high anode overpotentials, significantly reducing the performance of PGM-free AEMFCs. This would be a major barrier for the large-scale deployment of this technology once the other technological hurdles (e.g., membrane stability) have been overcome. A fundamental understanding of the HOR mechanism in basic media and of the main energy barriers needs to be firmly established to overcome this challenge. This review presents the current understanding of the HOR electrocatalysis in basic media and critically discusses the most recent material approaches. Promising future research directions in the development of the HOR electrocatalysts for alkaline electrolytes are also outlined.

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“…Meanwhile, various properties have also been investigated, including magnetism, adsorption and catalysis. [1][2][3][4][5] As an important a magnetic metal, nickel has extensive applications in various elds, including magnetic sensors, magnetic uids, memory storage, fuel cells, conducting materials, catalysts, biomedicine, [6][7][8][9][10][11][12][13][14] etc. Its oxide, nickel oxide (NiO), is a p-type semiconductor with a wide band-gap energy in the range of 3.6-4.0 eV, 15 and it also shows wide applications in many elds.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, properties and applications of flowerlike Ni–NiO composite microstructures

Yuan

Zhang

et al. 2013

J. Mater. Chem. A

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Novel methods of stabilization of Raney-Nickel catalyst for fuel-cell electrodes

Cited by 26 publications

References 4 publications

Nickel supported on nitrogen-doped carbon nanotubes as hydrogen oxidation reaction catalyst in alkaline electrolyte

Nickel supported on nitrogen-doped carbon nanotubes as hydrogen oxidation reaction catalyst in alkaline electrolyte

Electrocatalysts for Hydrogen Oxidation Reaction in Alkaline Electrolytes

Synthesis, properties and applications of flowerlike Ni–NiO composite microstructures

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