Addressing the intrinsic charge recombination of hematite (α‐Fe₂O₃) is significantly important for achieving highly efficient photo‐electrochemical water oxidation but still remains challenging. Herein, this challenge is tackled by constructing chemical interaction at the interface of α‐Fe₂O₃ and carbon nanosheets with single‐nickel sites (Ni‐NC), which can accelerate the reaction kinetics by providing additional charge transport channels and abundant active sites. The interfacial carrier path induced by the chemical coupling and the efficient single‐nickel sites work collaboratively, achieving an impressive photocurrent density of 1.85 mA cm⁻² at 1.23 V versus reversible hydrogen electrode (RHE), up to 2.2 times higher than that of pure α‐Fe₂O₃. These findings shed light on an interface modulation strategy and provide an alternative toward utilizing unique single active sites for efficient photo‐electrochemical water splitting.

中文翻译：

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利用单个活性位点构建赤铁矿与碳纳米片之间的化学相互作用，以实现有效的光电化学水氧化

寻址赤铁矿（α-Fe的固有电荷重组₂ ö ₃）是实现高效的光电化学水氧化显著重要但仍然仍然具有挑战性。在本文中，这种挑战是通过在界面构建的化学相互作用的α-Fe解决_2个ö ₃和碳纳米片与单镍位点（镍-NC），其可以通过提供额外的电荷传输信道和丰富的活性位点加速反应动力学。化学耦合和有效的单镍位点诱导的界面载流子路径协同工作，实现了令人印象深刻的1.85 mA cm ^-2的光电流密度在的1.23V相对于可逆氢电极（RHE），达2.2倍比纯的α-Fe更高₂ ö ₃。这些发现阐明了界面调制策略，并为利用独特的单个活性位点进行有效的光电化学水分解提供了一种选择。