Ultralow Pt Loaded Molybdenum Dioxide/Carbon Nanotubes for Highly Efficient and Durable Hydrogen Evolution Reaction

Ultralow Pt Loaded Molybdenum Dioxide/Carbon Nanotubes for Highly Efficient and Durable Hydrogen Evolution Reaction
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超低 Pt 负载二氧化钼/碳纳米管可实现高效、持久的析氢反应

DOI:
10.1021/acs.jpcc.7b08283
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发表时间:
2017-11
期刊:
J. Phys. Chem. C
影响因子:
--
通讯作者:
An-Wu Xu
An-Wu Xu
中科院分区:
其他
文献类型:
--
作者:
Xiao Xie;Yi-Fan Jiang;Cheng-Zong Yuan;Nan Jiang;Sheng-Jie Zhao;Li Jia;An-Wu Xu

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高效的电催化析氢反应(HER)是未来低成本制氢最有前途的方法之一。然而,开发高效、耐用和负担得起的催化剂仍然是一个挑战。在本文中,我们选择超小的Pt纳米团簇,金属MoO 2半导体,和导电材料与超低Pt负载作为一个积极的和持久的催化剂,在酸性介质中的HER。所得到的0. 5 wt % Pt-MoO 2/MWCNTs催化剂具有超低的Pt负载量,表现出高效的电催化活性和优异的稳定性。得益于金属MoO 2和MWCNTs的空间限制效应和良好的导电性,0. 5 wt % Pt-MoO 2/MWCNTs催化剂的HER活性与商业20wt%Pt/C催化剂相当。值得注意的是,金属Pt和MoO 2载体之间的强相互作用可以防止Pt物种的聚集; 0.5 wt % Pt-MoO 2/MWCNTs样品显示出比0.5 wt % Pt-MWCNTs和商业20 wt % Pt/C更好的稳定性。...
Efficient electrocatalytic hydrogen evolution reaction (HER) is one of the most promising ways to low-cost hydrogen production in the future. However, it is still a challenge to develop efficient, durable, and affordable catalysts. In this paper, we choose ultrasmall Pt nanoclusters, metallic MoO2 semiconductor, and conductive material with ultralow Pt loadings as an active and durable catalyst for HER in acid media. The obtained 0.5 wt % Pt–MoO2/MWCNTs catalyst with ultralow Pt loadings exhibits high-efficiency electrocatalytic activity and excellent stability. Benefiting from the space confinement effect and good electric conductivity of metallic MoO2 and MWCNTs, the HER activity of as-made 0.5 wt % Pt–MoO2/MWCNTs catalyst is comparable to that of commercial 20 wt % Pt/C catalyst. Remarkably, the strong interaction between metallic Pt and MoO2 support can prevent the aggregation of Pt species; the 0.5 wt % Pt–MoO2/MWCNTs sample shows better stability than 0.5 wt % Pt–MWCNTs and commercial 20 wt % Pt/C. ...
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