A sandwich structured C/NiO/TiO₂ nanotube arrays (C/NiO/TiO₂ NTAs) were presented for highly efficient water splitting. The NiO nanoparticles were deposited on the inner wall of anodized TiO₂ NTAs, followed by coating a carbon nanofilm via carbonization of a polydopamine membrane. The C/NiO/TiO₂ NTAs exhibit a superior HER activity to most earth-abundant electrocatalysts, with an overpotential of 86 mV at 10 mA cm⁻², a Tafel slope value of 67.1 mV dec⁻¹ and almost no degradation of HER activity after successive operation for 24 h.

中文翻译：

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夹层结构的C / NiO / TiO ₂纳米管阵列的制备，用于增强对氢释放的电催化活性

提出了一种三明治结构的C / NiO / TiO ₂纳米管阵列（C / NiO / TiO ₂ NTAs），用于高效水分解。将NiO纳米颗粒沉积在阳极氧化的TiO ₂ NTAs的内壁上，然后通过聚多巴胺膜的碳化来涂覆碳纳米膜。C / NiO / TiO ₂ NTA表现出优于大多数富含地球的电催化剂的HER活性，在10 mA cm ^-2下的过电势为86 mV ，Tafel斜率值为67.1 mV dec ^-1，几乎没有HER活性下降连续运行24小时后。