Liu Xiaoyu, Lu Haolin, Zhu Shengli, Cui Zhenduo, Li Zhaoyang, Wu Shuilin, Xu Wence, Liang Yanqin, Long Guankui, Jiang Hui
School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, China.
School of Materials Science and Engineering, Tianjin Key Lab for Rare Earth Materials and Applications, Renewable Energy Conversion and Storage Center (RECAST), Nankai University, Tianjin, 300350, China.
Angew Chem Int Ed Engl. 2023 Mar 20;62(13):e202300800. doi: 10.1002/anie.202300800. Epub 2023 Feb 15.
It is challenging to design one non-noble material with balanced bifunctional performance for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for commercial sustainability at a low cost since the different electrocatalytic mechanisms are not easily matchable for each other. Herein, a self-standing hybrid system Ni Fe Al , consisting of Ni Al and Ni Fe phases, was constructed by laser-assisted aluminum (Al) incorporation towards full water splitting. It was found that the incorporation of Al could effectively tune the morphologies, compositions and phases. The results indicate that Ni Fe Al delivers an extremely low overpotential to trigger both HER (η =188 mV) and OER (η =345 mV) processes and maintains a stable overpotential for 100 h, comparable to state-of-the-art electrocatalysts. The synergistic effect of Ni Al and Ni Fe alloys on the HER process is confirmed based on theoretical calculation.
由于不同的电催化机制不易相互匹配，因此设计一种具有平衡双功能性能的非贵金属材料用于析氢反应（HER）和析氧反应（OER）以实现低成本的商业可持续性具有挑战性。在此，通过激光辅助铝（Al）掺入构建了一种由NiAl和NiFe相组成的自立式混合体系NiFeAl用于全水解。发现Al的掺入可以有效地调节形貌、组成和相。结果表明，NiFeAl在触发HER（η = 188 mV）和OER（η = 345 mV）过程时具有极低的过电位，并在100小时内保持稳定的过电位，与最先进的电催化剂相当。基于理论计算证实了NiAl和NiFe合金在HER过程中的协同作用。
