催化作用
材料科学
对偶(语法数字)
化学工程
金属
纳米技术
相(物质)
化学
冶金
有机化学
艺术
文学类
工程类
作者
Fengqi Li,Dong Wu,Shuai Lv,Yujie Ma,Biao Wang,Yilun Ren,Cong Wang,Yuxuan Shi,Hurong Ji,Junjie Gu,Shaolong Tang,Xiangkang Meng
出处
期刊:Small
[Wiley]
日期:2023-10-27
被引量:1
标识
DOI:10.1002/smll.202309025
摘要
Transition metal-based sulfides exhibit remarkable potential as electrocatalysts for oxygen evolution reaction (OER) due to the unique intrinsic structure and physicochemical characteristics. Nevertheless, currently available sulfide catalysts based on transition metals face a bottleneck in large-scale commercial applications owing to their unsatisfactory stability. Here, the first fabrication of (FeCoNiMn2 )S2 dual-phase medium-entropy metal sulfide (dp-MEMS) is successfully achieved, which demonstrated the expected optimization of stability in the OER process. Benefiting from the "cell wall" -like structure and the synergistic effect in medium-entropy systems, (FeCoNiMn2 )S2 dp-MEMS delivers an exceptionally low overpotential of 169 and 232 mV at current densities of 10 and 100 mA cm-2 , respectively. The enhancement mechanism of catalytic activity and stability is further validated by density functional theory (DFT) calculations. Additionally, the rechargeable Zn-air batteries integrated with FeCoNiMn2 )S2 dp-MEMS exhibit remarkable performance outperforming the commercial catalyst (Pt/C+RuO2 ). This work demonstrates that the dual-phase medium-entropy metal sulfide-based catalysts have the potential to provide a greater application value for OER and related energy conversion systems.
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