Semiconductor oxide materials, including α-Fe₂O₃ (hematite), have been investigated as possible candidates for large-scale solar-to-chemical energy conversion. However, many of these materials suffer from inefficient charge transport leading to undesirable charge recombination. Although plasmon-enhanced photocatalysis has achieved some success in enhancing light absorption and hot carrier generation, the intrinsic ohmic losses within the metal hinder its wide applications. Here, we use large-area indium-tin-oxide (ITO) nanocone arrays that exhibit both high electrical transport, strong light trapping and enlarged surface area with reduced ohmic losses. We further adopted sputtered iron titanate (Fe₂TiO₅) thin films that show better photocatalytic performance than hematite. The photoanode made of all-oxide ITO/Fe₂TiO₅ nanocone array exhibited Mie resonance-enhanced photocurrent generation up to 31 times. These ITO nanocones can be readily combined with other oxide materials providing great opportunities for efficient photon management in enhanced photocatalysis.

半导体氧化物材料，包括的α-Fe ₂ ö ₃（赤铁矿），已被研究作为用于大规模太阳能到化学能量转换的可能候选者。然而，这些材料中的许多遭受电荷传输效率低下的困扰，从而导致不期望的电荷复合。尽管等离激元增强的光催化在增强光吸收和热载流子生成方面已取得了一些成功，但金属内部的固有欧姆损耗阻碍了其广泛应用。在这里，我们使用大面积的氧化铟锡（ITO）纳米锥阵列，该阵列既显示高电传输，强光捕获性能，又显示表面积增大且欧姆损耗减小。我们进一步采用了溅射的钛酸铁（Fe ₂ TiO ₅）薄膜显示出比赤铁矿更好的光催化性能。由全氧化物ITO / Fe ₂ TiO ₅纳米锥阵列制成的光阳极显示出Mie共振增强的光电流产生高达31倍。这些ITO纳米锥可以很容易地与其他氧化物材料结合，为增强光催化中的有效光子管理提供了巨大的机会。