Wang Xiang, Yang Linlin, Xing Congcong, Han Xu, Du Ruifeng, He Ren, Guardia Pablo, Arbiol Jordi, Cabot Andreu
Catalonia Institute for Energy Research (IREC), Sant Adrià de Besòs, 08930 Barcelona, Spain.
Departament d'Enginyeria Electrònica i Biomèdica, Universitat de Barcelona, 08028 Barcelona, Catalonia, Spain.
Nanomaterials (Basel). 2022 Mar 27;12(7):1098. doi: 10.3390/nano12071098.
The development of high-performance and cost-effective earth-abundant transition metal-based electrocatalysts is of major interest for several key energy technologies, including water splitting. Herein, we report the synthesis of ultrathin CoMoP nanosheets through a simple ion etching and phosphorization method. The obtained catalyst exhibits outstanding electrocatalytic activity and stability towards oxygen and hydrogen evolution reactions (OER and HER), with overpotentials down to 273 and 89 mV at 10 mA cm, respectively. The produced CoMoP nanosheets are also characterized by very small Tafel slopes, 54.9 and 69.7 mV dec for OER and HER, respectively. When used as both cathode and anode electrocatalyst in the overall water splitting reaction, CoMoP-based cells require just 1.56 V to reach 10 mA cm in alkaline media. This outstanding performance is attributed to the proper composition, weak crystallinity and two-dimensional nanosheet structure of the electrocatalyst.
开发高性能且经济高效的基于地球丰富元素的过渡金属电催化剂对于包括水分解在内的几种关键能源技术至关重要。在此，我们报告了通过一种简单的离子蚀刻和磷化方法合成超薄CoMoP纳米片。所获得的催化剂对析氧反应和析氢反应（OER和HER）表现出出色的电催化活性和稳定性，在10 mA cm时过电位分别低至273和89 mV。所制备的CoMoP纳米片还具有非常小的塔菲尔斜率，OER和HER分别为54.9和69.7 mV dec。当用作全水分解反应的阴极和阳极电催化剂时，基于CoMoP的电池在碱性介质中仅需1.56 V即可达到10 mA cm。这种出色的性能归因于电催化剂的适当组成、弱结晶度和二维纳米片结构。
