Nickel supported on nitrogen-doped carbon nanotubes as hydrogen oxidation reaction catalyst in alkaline electrolyte
Zhongbin Zhuang,Stephen A. Giles,Jie Zheng,Glen R. Jenness,Stavros Caratzoulas,Dionisios G. Vlachos,Yushan Yan +6 more
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TLDR
A composite catalyst, nickel nanoparticles supported on nitrogen-doped carbon nanotubes, has hydrogen oxidation activity similar to platinum-group metals in alkaline electrolyte and shows significant potential for use in low-cost, high-performance fuel cells.Abstract:
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.read more
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Recommended Practices and Benchmark Activity for Hydrogen and Oxygen Electrocatalysis in Water Splitting and Fuel Cells.
Chao Wei,Reshma R. Rao,Jiayu Peng,Botao Huang,Ifan E. L. Stephens,Marcel Risch,Zhichuan J. Xu,Yang Shao-Horn +7 more
TL;DR: The specific and mass activity activities of some state-of-the-art catalysts are benchmarked to facilitate the comparison of catalyst activity for these four reactions across different laboratories.
Alkaline Polymer Electrolyte Fuel Cells Completely Free From Noble Metal Catalysts
TL;DR: In this paper, a type of polymer electrolyte fuel cells (PEFC) employing a hydroxide ion-conductive polymer, quaternary ammonium polysulphone, as alkaline electrolyte and nonprecious metals, chromium-decorated nickel and silver, as the catalyst for the negative and positive electrodes, respectively.
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The recent development of efficient Earth-abundant transition-metal nanocatalysts
Dong Wang,Didier Astruc +1 more
TL;DR: This review highlights catalysis by NPs of Earth-abundant transition metals that include Mn, Fe, Co, Ni, Cu, early transition metals (Ti, V, Cr, Zr, Nb and W) and their nanocomposites with emphasis on basic principles and literature reported during the last 5 years.
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A Theory/Experience Description of Support Effects in Carbon-Supported Catalysts.
Iann C. Gerber,Philippe Serp +1 more
TL;DR: Some answers are provided to the question "How and why anchoring metal nanoparticles, clusters, or single atoms on carbon materials for catalysis?", and some important effects in catalysis inherent to the presence of a carbon-type support are described.
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Advances and challenges in alkaline anion exchange membrane fuel cells
TL;DR: In this article, a general description of the setup of AAEMFCs running on hydrogen and physical and chemical processes occurring in multi-layered porous structure is presented, and the effects of anode and cathode ionomers, structural designs, and water flooding on the performance of the single-cell are explained, and durability and power output of a singlecell are summarized.
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