Ultralow Pt0 loading on MIL-88A(Fe) derived polyoxometalate-Fe3O4@C micro-rods with highly-efficient electrocatalytic hydrogen evolution. Issue 17 (25th August 2020)

• Record Type: Journal Article
• Authors: Wang, Ming-Liang; Yin, Di; Cao, Yun-Dong; Gao, Guang-Gang; Pang, Tao; Ma, Lulu; Liu, Hong
• Is Part Of: Journal of coordination chemistry. Volume 73:Issue 17/19(2020)
• Page Start: 2422
• Page End: 2436
• Publication Date: 2020-08-25
• Subjects: Polyoxometalate -- hydrogen evolution reaction -- Pt nanoparticles -- metal-organic frameworks -- hierarchical; Coordination compounds -- Periodicals; 541.2242
• DOI: 10.1080/00958972.2020.1809656
• Languages: English
• ISSNs: 0095-8972

Abstract

Abstract: Synthesis of catalysts with high activity for hydrogen evolution reaction (HER) has been a hot topic in electrocatalysis. In this paper, using MIL-88A(Fe) metal-organic complex, polyoxometalate (POM) and H2 PtCl6 as starting materials, hierarchic and low Pt 0 -loading micro-rods (denoted as Pt-POMFe, i.e. Pt-PW12 Fe or Pt-PMo12 Fe) have been synthesized, in which the Pt 0 nanoparticles can be stabilized by POM. The Pt-PW12 Fe micro-rod containing [PW12 O40 ] 3- polyoxoanion component (0.30% Pt 0 -loading) which retains the spindle structure of its parent MIL-88A(Fe) exhibits a low overpotential of 28 mV at current density of 10 mA·cm −2 for HER that is close to the electrocatalytic effect of commercial Pt/C ( ca . 20% Pt 0 -loading). Such high electrocatalytic reactivity is mainly caused by the synergistic effect of the three components of POM, Pt 0, and Fe3 O4 @C. The structure effectively increases the active sites of the catalyst and improves its conductivity and stability. The Pt-POMFe catalyst extends a new family of MOF-POM functional materials and provides a new concept to the design and synthesis of highly-efficient and low-cost electrocatalyst for hydrogen production. Graphical Abstract: