Investigation of the Support Effect in Atomically Dispersed Pt on WO3-x for Utilization of Pt in the Hydrogen Evolution Reaction
Investigation of the Support Effect in Atomically Dispersed Pt on WO3-x for Utilization of Pt in the Hydrogen Evolution Reaction
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DOI：
10.1002/anie.201908122
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发表时间：
2019-11-04
影响因子：
16.6
通讯作者：
Lee, Jinwoo
中科院分区：
文献类型：
--
作者：
Park, Jinkyu;Lee, Seonggyu;Lee, Jinwoo
单原子催化剂（SACs）由于其具有不可预测的催化活性，能最大限度地增加催化剂的活性中心数而受到越来越多的关注。尽管有许多关于SAC的研究，但很少有关于支持的研究，这对于理解SAC至关重要。在此，我们系统地研究了载体对SAC性能的影响，通过与单原子Pt负载在碳上（Pt SA/C）和Pt纳米颗粒负载在WO 3-x上（Pt NP/WO 3-x）进行比较。结果表明，原子分散的Pt/WO 3-x（Pt SA/WO 3-x）催化剂的负载效果最好。Pt SA/WO 3-x在界面处表现出更高程度的从Pt原子到WO 3-x的氢溢出，与Pt NP/WO 3-x相比，这大大提高了Pt的析氢质量活性（高达10倍）。该策略通过减少SAC领域中贵金属的使用，为增强HER的催化活性提供了新的框架。
Single-atom catalysts (SACs) have attracted growing attention because they maximize the number of active sites, with unpredictable catalytic activity. Despite numerous studies on SACs, there is little research on the support, which is essential to understanding SAC. Herein, we systematically investigated the influence of the support on the performance of the SAC by comparing with single-atom Pt supported on carbon (Pt SA/C) and Pt nanoparticles supported on WO3-x (Pt NP/WO3-x). The results revealed that the support effect was maximized for atomically dispersed Pt supported on WO3-x (Pt SA/WO3-x). The Pt SA/WO3-x exhibited a higher degree of hydrogen spillover from Pt atoms to WO3-x at the interface, compared with Pt NP/WO3-x, which drastically enhanced Pt mass activity for hydrogen evolution (up to 10 times). This strategy provides a new framework for enhancing catalytic activity for HER, by reducing noble metal usage in the field of SACs.