Pt nanoparticles-decorated two-dimensional oxygen-deficient TiO2 nanosheet as an efficient and stable electrocatalyst for hydrogen evolution reaction
Pt nanoparticles-decorated two-dimensional oxygen-deficient TiO2 nanosheet as an efficient and stable electrocatalyst for hydrogen evolution reaction
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Pt纳米颗粒修饰的二维缺氧TiO2纳米片作为高效稳定的析氢反应电催化剂
DOI：
10.1039/d0nr02092c
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发表时间：
2020
期刊：
影响因子：
6.7
通讯作者：
Hiroshi Inoue
中科院分区：
文献类型：
--
作者：
Keerti M. Naik;Eiji Higuchi;Hiroshi Inoue
开发高活性、高稳定性、低成本的新型析氢反应催化剂对氢能的广泛应用具有重要意义。在传统的铂基多相催化剂中，贵金属铂的消耗量大、利用率低是最关键的问题。在本文中，我们提出了一种简单的方法来制备一种有效的HER催化剂，其中铂纳米颗粒分散在缺氧的TiO 2 −x纳米片（NS）上。所制造的Pt-TiO 2 −x NS电催化剂在0.5 M H2SO 4中的HER在10 mA cm−2下显示出35 mV的过电位，这与商业Pt/C（34 mV）非常相似。更吸引人的是，与商业Pt/C相比，Pt-TiO 2 −x NS电催化剂大大提高了Pt的质量活性（MA）和电化学稳定性。Pt-TiO 2 −x NS优异的HER性能归因于高度分散的Pt物种和具有氧空位的TiO 2 −x NS之间的协同效应，这在宽pH范围内增强了电催化活性和耐久性。这种策略可以为构建高效催化剂及其对不同能源相关应用的支持提供见解。
Developing novel hydrogen evolution reaction (HER) catalysts with high activity, high stability and low cost is of great importance for the ever-broader applications of hydrogen energy. Among the conventionally used platinum-based heterogeneous catalysts, the high consumption and low utilization efficiency of precious platinum are the most crucial issues. Herein we present a facile approach to prepare an effective HER catalyst with platinum nanoparticles dispersed on oxygen-deficient TiO2−x nanosheets (NSs). The fabricated Pt–TiO2−x NS electrocatalyst shows an overpotential of 35 mV at 10 mA cm−2 for the HER in 0.5 M H2SO4, which is highly comparable to that of commercial Pt/C (34 mV). More attractively, the Pt–TiO2−x NS electrocatalyst largely enhanced the mass activity (MA) of Pt and electrochemical stability compared to commercial Pt/C. The excellent HER performance of Pt–TiO2−x NSs is attributed to the synergetic effect between highly dispersed Pt species and TiO2−x NSs with oxygen vacancies, which enhances both electrocatalytic activity and durability over a wide pH range. This strategy can provide insights into constructing highly efficient catalysts and their support for different energy-related applications.