Hydrogen generation from water splitting driven by electric/solar energy is highly desirable, which requires efficient and robust bifunctional electrocatalysts for both hydrogen and oxygen evolution reactions. 2D porous hybrids with attractive chemical and structural properties are the first‐class candidates for water splitting, while control over efficient and modulable synthesis remains a huge challenge. This work demonstrates a zeolitic imidazolate framework‐67 (ZIF‐67) nanoplate self‐template approach to fabricate 2D porous oxygen‐incorporated cobalt phosphide (CoPO) ultrathin nanosheets. The synthesis starts with the oriented growth of ZIF‐67 nanoplates along [211] crystal plane, followed by oxidation/phosphorization processes for pore generation and O/P coincorporation in the hybrid. The resultant 2D porous CoPO nanosheets afford very small voltages of 1.52 and 1.98 V for overall water splitting at 10 and 200 mA cm⁻², respectively. This excellent bifunctionality further provides the basis for photovoltage‐driven water splitting at a Faradaic efficiency of 97.6%. These findings offer a general strategy for rational design and modulation of 2D porous catalysts for various electrocatalytic and other applications.

中文翻译：

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ZIF-67定向生长到二维二维多孔CoPO纳米片上，用于电化学/光电压驱动的总水分解

由电能/太阳能驱动的水分解产生氢非常需要，这需要用于氢和氧逸出反应的有效且坚固的双功能电催化剂。具有有吸引力的化学和结构特性的2D多孔杂化体是水分解的一流候选者，而对有效和可调节合成的控制仍然是一个巨大的挑战。这项工作证明了采用沸石咪唑盐骨架67（ZIF-67）纳米板自模板方法可制造二维多孔氧结合的磷化钴（CoPO）超薄纳米片。合成从ZIF-67纳米板沿[211]晶面定向生长开始，然后是氧化/磷化过程以产生孔并在杂化体中掺入O / P硬币。^-2。这种出色的双功能性进一步为光电压驱动的水分解提供了基础，法拉第效率为97.6％。这些发现为合理设计和调节2D多孔催化剂用于各种电催化和其他应用提供了一般策略。