As a unique monoelemental 2D material, black phosphorus (BP) has attracted great research interest in the field of electrocatalytic oxygen release due to its special electronic structure and satisfactory catalytic activity. However, the limited catalytic activity of BP nanosheets limits its practical application. Here, a one‐pot hot solution method is used to synthesize a mixed‐dimensional hybrid of BP nanosheets loaded with Au nanoparticles (BP/Au). The electrochemical test results show the BP/Au exhibits excellent electrocatalytic oxygen evolution performance with an ultra‐low onset potential (1.36 V) and Tafel slope (68.1 mV dec⁻¹). The first‐principles calculation results further support the experimental results, in which the loading of Au nanoparticles realizes the transition of BP from the semiconductor phase to the metal phase, which makes the BP/Au exhibit faster carrier mobility. The BP/Au also exhibits a Gibbs free energy closer to the optimal value of the OER. This is because Au nanoparticles can inject free electrons unto the surface of BP and realize the coupling effect between the local semiconductor and metal, thereby effectively improving the carrier mobility and catalytic activity. This work fully confirms that the BP/Au is a suitable candidate for electrocatalytic oxygen evolution, and provides effective strategies for constructing efficient electrocatalysts.

中文翻译：

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金纳米粒子修饰的黑色磷纳米片作为高电导率和高活性氧分解反应的电催化剂

作为一种独特的单元素二维材料，黑磷（BP）由于其特殊的电子结构和令人满意的催化活性，在电催化除氧领域引起了极大的研究兴趣。然而，BP纳米片的有限的催化活性限制了其实际应用。在这里，采用一锅法热解法合成了负载有金纳米颗粒（BP / Au）的BP纳米片的混合尺寸混合体。电化学测试结果表明，BP / Au具有出色的电催化除氧性能，具有超低的起始电势（1.36 V）和Tafel斜率（68.1 mV dec ^-1）。第一性原理计算结果进一步支持了实验结果，其中金纳米颗粒的负载实现了BP从半导体相到金属相的转变，这使得BP / Au表现出更快的载流子迁移率。BP / Au还显示出接近OER最佳值的吉布斯自由能。这是因为Au纳米颗粒可以将自由电子注入到BP表面，并实现局部半导体与金属之间的耦合作用，从而有效地改善了载流子迁移率和催化活性。这项工作充分证实了BP / Au是用于电催化氧逸出的合适候选物，并为构建有效的电催化剂提供了有效的策略。