Ultralow Pt(0)loading on MIL-88A(Fe) derived polyoxometalate-Fe3O4@C micro-rods with highly-efficient electrocatalytic hydrogen evolution
Ultralow Pt(0)loading on MIL-88A(Fe) derived polyoxometalate-Fe3O4@C micro-rods with highly-efficient electrocatalytic hydrogen evolution
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MIL-88A(Fe) 衍生的多金属氧酸盐-Fe3O4@C 微棒上超低 Pt(0) 负载并具有高效电催化析氢
DOI：
10.1080/00958972.2020.1809656
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发表时间：
2020
影响因子：
1.9
通讯作者：
Liu Hong
中科院分区：
文献类型：
--
作者：
Wang Ming-Liang;Yin Di;Cao Yun-Dong;Gao Guang-Gang;Pang Tao;Ma Lulu;Liu Hong
合成高活性的析氢催化剂一直是电催化领域的研究热点。本文以MIL-88 A（Fe）金属有机配合物、聚氧乙烯酸盐（POM）和H_2PtCl_6为原料，合成了一系列低载铂量的微米棒（Pt-POMFe，即Pt-PW_（12）Fe或Pt-PMo_（12）Fe），其中的Pt 0纳米颗粒可以被POM稳定。含有[PW 12 O 40]3-多氧阴离子组分（0.30%Pt0-负载量）的Pt-PW 12 Fe微棒保留了其母体MIL-88 A（Fe）的纺锤体结构，在10 mA·cm− 2电流密度下表现出28 mV的低HER过电位，接近商业Pt/C（约. 20%Pt0-负载）。这种高的电催化活性主要是由POM、Pt 0和Fe3O4@C三种组分的协同作用引起的。该结构有效地增加了催化剂的活性位，提高了其导电性和稳定性。Pt-POMFe催化剂扩展了MOF-POM功能材料的新家族，为高效、低成本的制氢电催化剂的设计和合成提供了新的思路。
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 H2PtCl6as starting materials, hierarchic and low Pt0-loading micro-rods (denoted as Pt-POMFe,i.e.Pt-PW12Fe or Pt-PMo12Fe) have been synthesized, in which the Pt0nanoparticles can be stabilized by POM. The Pt-PW12Fe micro-rod containing [PW12O40]3-polyoxoanion component (0.30% Pt0-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−2for HER that is close to the electrocatalytic effect of commercial Pt/C (ca. 20% Pt0-loading). Such high electrocatalytic reactivity is mainly caused by the synergistic effect of the three components of POM, Pt0, and Fe3O4@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.