Hydrogen Spillover Intensified by Pt Sites on Single-Crystalline MoO3 Interconnected Branches for Hydrogen Evolution,ACS Energy Letters

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Hydrogen Spillover Intensified by Pt Sites on Single-Crystalline MoO3 Interconnected Branches for Hydrogen Evolution
ACS Energy Letters ( IF 19.3 ) Pub Date : 2023-08-25 , DOI: 10.1021/acsenergylett.3c01459
Juan Bai _{1,

2} , Jing Shang ₃ , Jun Mei _{1,

2} , Xiaodong Wang ₄ , Chao Zhang _{1,

2,

4} , Hashara Kandambige ₁ , Dong-Chen Qi ₁ , Ting Liao ₅ , Ziqi Sun _{1,

2}

Affiliation

Hydrogen spillover is a well-recognized phenomenon in the electrocatalytic hydrogen evolution reaction (HER), and the spillover rate is highly dependent on metal–support interfaces. However, for the commonly used platinum (Pt) in HER, rational selection of the ideal support for intensifying spillover remains elusive. Herein, three-dimensional single-crystalline molybdenum oxide (s-MoO₃) is proposed as an ideal support for active Pt sites. In contrast to these traditional support materials, the resultant s-MoO₃ manifests an interconnected branch-like morphology, a zigzag-type stepped edge, a porous surface, and a partially reductive surface. By virtue of these morphological and structural advantages of s-MoO₃ interconnected branches, the subsequent loading of Pt particles could induce the intensified spillover rate accompanied by the formation of the H(O)_xMoO₃ intermediate and thus the enhanced activity for HER. It is expected that this work will enrich the current knowledge on hydrogen spillover mechanisms and offer an effective intensification strategy for support-type catalysts.

中文翻译：

用于析氢的单晶 MoO3 互连分支上的 Pt 位点增强了氢溢出

氢气溢出是电催化析氢反应（HER）中众所周知的现象，溢出率高度依赖于金属-载体界面。然而，对于 HER 中常用的铂 (Pt)，如何合理选择加强溢出的理想支撑仍然难以实现。在此，提出三维单晶氧化钼（s -MoO _{3 ）作为活性Pt位点的理想载体。}与这些传统的载体材料相比，所得的s -MoO ₃表现出互连的枝状形貌、之字形阶梯边缘、多孔表面和部分还原表面。凭借s -MoO的这些形态和结构优势_{3 个}相互连接的分支，随后 Pt 颗粒的负载可以导致溢出速率增强，同时形成 H(O) _x MoO ₃中间体，从而增强 HER 活性。预计这项工作将丰富目前关于氢溢出机制的知识，并为载体型催化剂提供有效的强化策略。

更新日期：2023-08-25

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