A hybrid of MIL-53(Fe) and conductive sulfide as a synergistic electrocatalyst for the oxygen evolution reaction. Issue 29 (14th July 2020)

• Record Type: Journal Article
• Authors: Wu, Fang; Guo, Xiaoxue; Wang, Qinghua; Lu, Suwei; Wang, Jinling; Hu, Yubing; Hao, Gazi; Li, Qiulin; Yang, Min-Quan; Jiang, Wei
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 29(2020)
• Page Start: 14574
• Page End: 14582
• Publication Date: 2020-07-14
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0ta01912g
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A novel hybrid of MIL-53(Fe) and conductive sulfide (Ni3 S2 /MIL-53(Fe)) supported on nickel foam is constructed as an excellent oxygen evolution electrocatalyst. Abstract : The development of effective electrocatalysts for sustainable energy conversion and storage is highly desired, but still a considerable challenge due to the sluggish oxygen evolution reaction (OER). Herein, we report a novel composite of MIL-53(Fe) with Ni3 S2 nanosheet arrays supported on Ni foam that ingeniously combines the chemical and structural advantages of the MOFs and metal sulfides to perform as a high-performance synergistic OER electrocatalyst in alkaline solution. The hybrid Ni3 S2 /MIL-53(Fe) simultaneously realizes high electrical conductivity to facilitate charge transfer and abundant coordinatively unsaturated centres, porosity and high surface area to provide a great number of active sites. Strikingly, synergistic electronic interaction between Ni3 S2 and MIL-53(Fe) is generated in the hybrid composite. Collectively, the coupled Ni3 S2 /MIL-53(Fe) exhibits excellent OER performance in comparison to bare Ni3 S2 and MIL-53(Fe), with low potentials of 214 and 251 mV to reach current densities of 10 and 100 mA cm −2, respectively. The Tafel slope is 33.8 mV dec −1, which is also markedly lower than those of Ni3 S2, MIL-53(Fe) and most reported Ni-based electrocatalysts. The present work paves a promising avenue to design and fabricate highly active and earth-abundant electrocatalysts toward the OER.