期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 7, 期 17, 页码 15073-15079出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b03731
关键词
Fe-Ni LDH; Homogeneous heterostructure; Bifunctional; Water splitting
资金
- National Natural Science Foundation of China [21871005, 21471006]
- Recruitment Program for Leading Talent Team of Anhui Province
- Program for Innovative Research Team of Anhui Education Committee
- Research Foundation for Science and Technology Leaders and Candidates of Anhui Province
Design and synthesis of highly efficient, stable, and low-cost catalysts have a crucial role in the study of electrolytic water. In this work, a novel Fe-Ni layered double hydroxide (LDH) material with homogeneous heterostructures is successfully synthesized by a two-step hydrothermal method. Compared with the ordinary Fe-Ni LDH arrays prepared by one step, this structure has a rougher surface, so it has a more extensive active area, thus providing more active sites. Due to the synergistic effect of different elements and more exposure of active sites, the catalytic effect of this material for water splitting is outstanding. The post-optimized FeNi@FeNi electrode exhibits extraordinary OER (oxygen evolution reaction) and HER (hydrogen evolution reaction) performance with OER overpotentials of 193, 231, and 306 mV and HER overpotentials of 127, 173, and 253 mV when the current density is 10, 20, and 50 mA.cm(-2), respectively. The improved electrolytic water performance reveals that the design of homogeneous heterostructures is maybe an alternative route to exploit high-efficiency catalysts and promote the application of nonprecious metal catalytic materials.
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