4.7 Article

Uniform palladium-nickel nanowires arrays for stable hydrogen leakage detection and efficient hydrogen evolution reaction

期刊

CHEMICAL ENGINEERING JOURNAL
卷 400, 期 -, 页码 -

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.125864

关键词

Palladium-nickel alloy; Nanowires arrays; Hydrogen leakage detection; Wide temperature range; Hydrogen evolution reaction

资金

  1. National Natural Science Foundation of China [21473093]
  2. Fundamental Research Funds for the Central Universities, Nankai University [63191745]

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As a high-energy-density, renewable and green energy carrier, hydrogen has recently received increasing attention. However, the reliable detection for hydrogen leakage, especially in harsh environmental conditions, and the efficient high-purity hydrogen production are still challenging issues. Here, we report that uniform palladium-nickel nanowires (PdNi NWs) arrays, which have been synthesized via anode-aluminum-oxide (AAO) template-confined electrodeposition as bi-functional material for hydrogen leakage detection and hydrogen evolution reaction (HER). PdNi NWs arrays exhibit rough surface with the diameter of similar to 60 nm and present alloyed crystallization. Benefited from the synergic effect of the rough surface of PdNi NWs etched during synthesis and the electronic structure of Pd modified by Ni, PdNi NWs enable to stably work within the wide temperature range of 153-388 K, in which the Pd-Ni alloying decreases the critical temperature of reverse sensing behavior to 153 K. Meanwhile, the PdNi NWs show the overpotential of 91 mV at 10 mA/cm(2), and the Tafel slope of 96 mV/dec in 0.5 M H2SO4. The PdNi NWs show great potential in both hydrogen leakage detection and hydrogen evolution reaction.

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