MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University , Guangzhou 510275, P. R. China.
ACS Appl Mater Interfaces. 2017 Sep 27;9(38):32812-32819. doi: 10.1021/acsami.7b10893. Epub 2017 Sep 18.
Transition metal phosphides have recently been regarded as robust, inexpensive electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). Thus far, tremendous scientific efforts have been applied to improve the catalytic activity of the catalyst, whereas the scale-up fabrication of morphology-controlled catalysts while maintaining their desired performance remains a great challenge. Herein, we present a facile and scalable approach to fabricate the macroporous NiP/nickel foam electrode. The obtained electrocatalyst exhibits superior bifunctional catalytic activity and durability, as evidenced by a low overpotential of 205 and 300 mV required to achieve a high current density of 100 mA cm for HER and OER, respectively. Such a spray-based strategy is believed to widely adapt for the preparation of electrodes with uniform macroporous structures over a large area (e.g., 100 cm), which provides a universal strategy for the mass fabrication of high performance water-splitting electrodes.
近年来，过渡金属磷化物被认为是氢析出反应（HER）和氧析出反应（OER）的稳健、廉价的电催化剂。到目前为止，人们已经投入了大量的科学努力来提高催化剂的催化活性，而在保持所需性能的同时，大规模制造形态控制的催化剂仍然是一个巨大的挑战。在此，我们提出了一种简便且可扩展的方法来制备具有大孔结构的 NiP/泡沫镍电极。所获得的电催化剂表现出优异的双功能催化活性和耐久性，HER 和 OER 分别需要 205 mV 和 300 mV 的低过电势，即可实现 100 mA cm 的高电流密度。这种基于喷涂的策略有望广泛适用于在大面积（例如 100 cm）上制备具有均匀大孔结构的电极，为高性能水分解电极的大规模制造提供了一种通用策略。
