Abstract A Raney Ni electrode was prepared by the simple and economical atmospheric plasma spraying method. It showed excellent performance for hydrogen evolution reaction (HER), as indicated by a Tafel slope of 54 mV/dec and overvoltage of 108 mV at 300 mA/cm2. The Ni–Al alloy coating contained a NiAl phase, which has a very slow Al leaching rate in alkaline solution. H2 heat treatment of the electrode enhanced the uniformity of Al distribution in the coating and adhesion of the coating to the substrate. However, the HER performance did not improve and the electrode was rendered more structurally vulnerable to deactivation.

中文翻译：

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常压等离子喷涂法制备用于碱性水电解的雷尼镍电极的电化学表征

摘要 采用简单经济的常压等离子喷涂法制备了Raney Ni电极。它显示出优异的析氢反应 (HER) 性能，如 54 mV/dec 的 Tafel 斜率和 300 mA/cm2 下的 108 mV 过电压所示。Ni-Al 合金涂层含有 NiAl 相，在碱性溶液中具有非常慢的 Al 浸出速率。电极的 H2 热处理提高了镀层中铝分布的均匀性和镀层对基体的附着力。然而，HER 性能并没有改善，电极在结构上更容易失活。