Mane Rupali S, Zaroliwalla Dilkhush, Periyasamy Ganga, Jha Neetu
Department of Physics, Institute of Chemical Technology Mumbai, Nathalal Parekh Marg, Mumbai, 400019, India.
Department of Chemistry, Bangalore University, Bangalore, 560056, India.
Small. 2025 Jul;21(30):e2503228. doi: 10.1002/smll.202503228. Epub 2025 Apr 28.
Electrocatalytic water splitting is a significant method of hydrogen production to overcome energy scarcity and tackle the environmental pollution caused by the extreme consumption of fossil fuels. This work directs the focus on the development of an efficient catalyst toward hydrogen and oxygen evolution reactions (HER and OER). Herein, a highly active and robust bi-metallic phosphate nanocomposite supported on Mxene is derived from an in situ technique, using a 2D (leafy) zeolitic imidazolate framework (ZIF 67) and phosphorus-doped nickel hydroxide [P-Ni(OH)] as a primary precursor for the first time. The synergy between the reaction mechanism leads to the formation of highly porous, needle-like morphology with a layer boundary interface. A remarkable performance of the catalyst is obtained with significantly low overpotential and excellent stability toward HER and OER. In conjunction with structural merits and catalytic activity, excellent performance is attributed to the optimized porosity owing to the 2D/3D conducting interface channel. The theoretical and experimental insights on the study affirm the conducive nature of the catalyst for overall water splitting. This finding exposed a new avenue for the chemistry between MOF and phosphate with conducting substrate to develop a highly active electrocatalyst for HER and overall water splitting.
电催化水分解是一种重要的制氢方法，可克服能源短缺问题，并解决因过度消耗化石燃料而造成的环境污染。这项工作将重点聚焦于开发一种用于析氢反应和析氧反应（HER和OER）的高效催化剂。在此，首次采用原位技术，以二维（叶状）沸石咪唑酯骨架（ZIF 67）和磷掺杂氢氧化镍[P-Ni(OH)]作为主要前驱体，制备了一种负载在MXene上的高活性且稳定的双金属磷酸盐纳米复合材料。反应机理之间的协同作用导致形成具有层边界界面的高度多孔针状形态。该催化剂表现出显著的性能，具有极低的过电位以及对HER和OER的优异稳定性。结合结构优点和催化活性，优异的性能归因于二维/三维导电界面通道所带来的优化孔隙率。该研究的理论和实验见解证实了该催化剂对整体水分解的有利性质。这一发现为金属有机框架与磷酸盐在导电基底上发生化学反应以开发用于HER和整体水分解的高活性电催化剂开辟了一条新途径。
