文献类型：期刊文献

英文题名：Amorphous-Amorphous Coupling Enhancing the Oxygen Evolution Reaction Activity and Stability of the NiFe-Based Catalyst

作者：Gao, Hanqing[1];Sun, Wei[1];Tian, Xinlong[2];Liao, Jianjun[1];Ma, Chenglong[3];Hu, Yuling[1];Du, Gan[1];Yang, Ji[3];Ge, Chengjun[1]

机构：[1]Hainan Univ, Coll Ecol & Environm, Key Lab Agroforestry Environm Proc & Ecol Regulat, Haikou 570228, Hainan, Peoples R China;[2]Hainan Univ, State Key Lab Marine Resource Utilizat South Chin, Haikou 570228, Hainan, Peoples R China;[3]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：14

期号：13

起止页码：15205

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20221511961604);WOS:【SCI-EXPANDED(收录号:WOS:000800295400032)】；

基金：This work was financially supported by the Natural Science Foundation of Hainan Province (2019RC073), the National Natural Science Foundation of China (22102042), and research funds from Hainan University [KYQD(ZR)1909]. The authors thank the Shanghai Synchrotron 574 Radiation Facility (SSFR, beamline BL14W1, Shanghai, China) and the National Synchrotron Radiation Laboratory (NSRL, beamline BL11U, Hefei, China) for providing the beam times. The authors also thank the Analytical and Testing Center of Hainan University and the State Key Laboratory of Marine Resource Utilization in South China Sea for providing characterization instruments.

语种：英文

外文关键词：NiFe LDH; OER; CuS; amorphous-amorphous coupling; Cu foam

摘要：Efficient and stable electrocatalytic water splitting plays a critical role in energy storage and conversion but is strongly restricted by the low activity and stability of catalysts associated with the complicated oxygen evolution reaction (OER). This work provides a strategy to fabricate an advanced NiFe-based catalyst to steadily speed up the OER based on a strong amorphous-amorphous coupling effect generated through amorphous CuS that induces the formation of amorphous NiFe layered double hydroxide (LDH) nanosheets (A-NiFe NS/CuS). The presence of the strong coupling effect not only modifies the electronic structure of catalytic sites to accelerate the reaction kinetics but also enhances the binding between the catalyst and substrate to strengthen the durability. In comparison to well-grown core-shell crystalline NiFe LDH on CuO, the as-synthesized amorphous A-NiFe NS/CuS gives a low overpotential of 240 mV to achieve 100 mA cm(-2) and shows robust stability under 100 h of operation at the same current density. Therefore, amorphous-amorphous coupling between catalyst-substrate by elaborate and rational engineering yields an opportunity to design efficient and robust NiFe-based OER catalysts.