Oxygen-incorporated defect-rich MoP for highly efficient hydrogen production in both acidic and alkaline media
Oxygen-incorporated defect-rich MoP for highly efficient hydrogen production in both acidic and alkaline media
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掺氧富缺陷MoP可在酸性和碱性介质中高效产氢
DOI：
10.1016/j.electacta.2018.05.176
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发表时间：
2018-08
影响因子：
6.6
通讯作者：
Dezhi Wang
中科院分区：
文献类型：
--
作者：
Xiangyong Zhang;Zhuangzhi Wu;Dezhi Wang
磷化钼（MoP）作为一种潜在的析氢反应电催化剂受到了广泛的关注。尽管人们在提高MoP的HER活性方面做了大量的努力，但合理设计具有更多活性中心或更高电导率的MoP催化剂仍然具有挑战性。在此，通过一种新的和容易的低温煅烧策略合成了一种富缺陷的结构（DR-MoP）。此外，DR-MoP也被证明与氧结合。富缺陷结构可以提供更多的活性位点，并且氧的掺入可以进一步提高本征导电性。因此，DR-MoP催化剂在酸性和碱性介质中均显示出出色的HER活性和稳定性，使其成为替代贵金属催化剂的良好替代品。此外，通过控制不同的退火温度，对DR-MoP的形成机理进行了探讨。本工作为通过缺陷工程改善过渡金属磷化物的HER性能提供了一条新的有效途径。
Molybdenum phosphide (MoP) has attracted a lot of attentions as a potential electrocatalyst for the hydrogen evolution reaction (HER). Although great efforts have been made to improve the HER activity of MoP, the rational design of MoP catalysts with either more active sites or higher conductivity is still challenging. Herein, a defect-rich structure (DR-MoP) is synthesized via a novel and facile low-temperature calcination strategy. Moreover, the DR-MoP is also proved to be incorporated with oxygen. The defect-rich structures could provide more active sites, and the incorporation of oxygen could further enhance the intrinsic conductivity. Thus, the DR-MoP catalyst shows outstanding HER activity and stability in both acidic and alkaline media, making it a good alternative to replace the precious-metal catalysts. Besides, the formation mechanism of DR-MoP has been discussed by controlling different annealing temperatures. This work paves a novel and effective way for improving the HER performance of transition metal phosphides by defect engineering.
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