Guo Rui, Zhao Zhifeng, Su Zhanhua, Liang Jing, Qu Weili, Li Xiaofeng, Shang Yongchen
College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China.
College of Chemistry, Guangdong University of Petrochemical Technology, Maoming 525000, China.
Langmuir. 2024 Dec 10;40(49):26339-26349. doi: 10.1021/acs.langmuir.4c04136. Epub 2024 Nov 22.
The reasonable design of highly efficient NiFe-based bifunctional electrocatalysts is imperative for water splitting and alleviation of the energy crisis. Herein, the NiFe-based bifunctional electrocatalysts are designed and grown in situ on Ni foam by a simple hydrothermal method. The interfacial effect among NiFe-LDH, FeO(OH), and NiFeO exposes more catalytic active sites, modulated electronic structure, and optimization of the electrocatalytic performances. The overpotentials of NiFe-LDH/FeO(OH)/NiFeO/NF-15h (NFN/NF-15h) for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are 78 and 208 mV at 10 mA cm, respectively. Overall water splitting can drive 10 mA cm with a cell voltage of only 1.538 V. This work contributes a feasible idea for the design and synthesis of NiFe-based bifunctional electrocatalysts with outstanding water splitting performance.
合理设计高效的镍铁基双功能电催化剂对于水分解和缓解能源危机至关重要。在此，通过简单的水热法在泡沫镍上原位设计并生长镍铁基双功能电催化剂。NiFe-LDH、FeO(OH)和NiFeO之间的界面效应暴露出更多的催化活性位点，调节了电子结构，并优化了电催化性能。在10 mA cm时，NiFe-LDH/FeO(OH)/NiFeO/NF-15h（NFN/NF-15h）用于析氢反应（HER）和析氧反应（OER）的过电位分别为78和208 mV。全水解可以在仅1.538 V的电池电压下驱动10 mA cm。这项工作为设计和合成具有优异水分解性能的镍铁基双功能电催化剂提供了一个可行的思路。
