This paper demonstrates a novel approach to prepare NH₄CoPO₄·H₂O nanoplates on commercial Co foils via a chemical corrosion process. As a 3D self-supported oxygen revolution reaction (OER) electrocatalyst, the as-developed NH₄CoPO₄·H₂O/Co exhibits remarkable electrocatalytic activity and exceptional stability. In specific, it can deliver a catalytic current density of 10 mA cm⁻² at an ultralow overpotential of 262 mV. Notably, it can hold its catalytic performance for 100 h at least. The impressive catalytic activity can be mainly attributed to the 3D self-supported configuration that provides abundant exposed active sites and rapid charge transfer and mass transport.

本文展示了一种通过化学腐蚀工艺在商用Co箔上制备NH ₄ CoPO ₄ ·H ₂ O纳米板的新颖方法。NH ₄ CoPO ₄ ·H ₂ O / Co作为一种3D自支撑氧旋转反应（OER）电催化剂，具有出色的电催化活性和出色的稳定性。具体而言，它可以提供10 mA cm ^-2的催化电流密度在262 mV的超低过电位。值得注意的是，它至少可以保持100小时的催化性能。令人印象深刻的催化活性主要归因于3D自支撑结构，该结构提供了丰富的暴露活性位点以及快速的电荷转移和质量传输。