Chen Yafeng, Meng Ge, Chang Ziwei, Dai Ningning, Chen Chang, Hou Xinmei, Cui Xiangzhi
The State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
Beijing Advanced Innovation Center for Materials Genome Engineering, Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China.
Nanomaterials (Basel). 2022 Dec 23;13(1):74. doi: 10.3390/nano13010074.
Developing highly efficient, cost effective and durable bifunctional electrocatalyst remains a key challenge for overall water splitting. Herein, a bifunctional catalyst CoP-MoP/NF with rich heterointerfaces was successfully prepared by a two-step hydrothermal-phosphorylation method. The synergistic interaction between CoP and MoP heterogeneous interfaces can optimize the electronic structure of active sites, leading to the weak adsorption of H on the Mo sites and the increased redox activity of the Co site, resultantly improving the HER/OER bifunctional catalytic activity. The synthesized CoP-MoP/NF catalyst exhibits excellent electrocatalytic activity in 1.0 M KOH with low overpotentials of 77.6 and 300.3 at 100 mA cm for HER and OER, respectively. Additionally, the assembled CoP-MoP/NF||CoP-MoP/NF electrolyzer delivers a current density of 100 mA cm at a cell voltage of 1.59 V and remains stable for at least 370 h at 110 mA cm, indicating the potential application prospective in water splitting.
开发高效、经济高效且耐用的双功能电催化剂仍然是全水解的关键挑战。在此，通过两步水热-磷化法成功制备了具有丰富异质界面的双功能催化剂CoP-MoP/NF。CoP和MoP异质界面之间的协同相互作用可以优化活性位点的电子结构，导致H在Mo位点上的吸附较弱以及Co位点的氧化还原活性增加，从而提高HER/OER双功能催化活性。合成的CoP-MoP/NF催化剂在1.0 M KOH中表现出优异的电催化活性，在100 mA cm下HER和OER的过电位分别为77.6和300.3。此外，组装的CoP-MoP/NF||CoP-MoP/NF电解槽在1.59 V的电池电压下提供100 mA cm的电流密度，并在110 mA cm下保持稳定至少370小时，表明在水分解方面具有潜在的应用前景。
