Henan Provincial Key Laboratory of Surface and Interface Science , Zhengzhou University of Light Industry , No. 136, Science Avenue , Zhengzhou 450001 , China.
Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Materials and Chemical Engineering , Zhengzhou University of Light Industry , No. 136, Science Avenue , Zhengzhou 450001 , China.
ACS Appl Mater Interfaces. 2018 Jul 18;10(28):23858-23873. doi: 10.1021/acsami.8b06568. Epub 2018 Jul 6.
Exploiting high-efficiency and low-cost bifunctional electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) has been actively encouraged because of their potential applications in the field of clean energy. In this paper, we reported a novel electrocatalyst based on an exfoliated two-dimensional (2D) MXene (TiCT ) loaded with bimetallic oxide alloy nanoparticles (NPs) of Pt and Pd (represented by PtO PdO NPs@TiCT ), which was synthesized via solution plasma (SP) modification. The prepared materials were then utilized as highly efficient bifunctional electrocatalysts toward the HER and OER in alkaline solution. At a high plasma input power (200 W), bimetallic oxide alloy nanoparticles of Pt and Pd or nanoclusters with different metallic valence states were deposited onto the TiCT nanosheets. Because of the synergism of the noble-metal NPs and the TiCT nanosheets, the electrocatalytic results revealed that the as-prepared PtO PdO NPs@TiCT nanosheets under the plasma input power of 200 W for 3 min only required a low overpotential to attain 10 mA cm for the HER (-26.5 mV) in 0.5 M HSO solution and OER (1.54 V) in 0.1 M KOH solution. Moreover, water electrolysis using this catalyst achieved a water splitting current density of 10 mA cm at a low cell voltage of 1.53 V in 1.0 M KOH solution. These results suggested that the hybridization of the extremely low usage of PtO /PdO NPs (1.07 μg cm) and TiCT nanosheets by SP will expand the applications of other clean energy reactions to achieve sustainable energy.
开发高效、低成本的双功能电催化剂对于析氢反应（HER）和析氧反应（OER）具有重要意义，因为它们在清洁能源领域具有潜在的应用前景。本文报道了一种基于二维（2D）MXene（TiCT）负载双金属氧化物合金纳米粒子（Pt 和 Pd 的代表物为 PtO-PdO NPs）的新型电催化剂，该催化剂通过溶液等离子体（SP）改性合成。然后，将制备的材料用作碱性溶液中 HER 和 OER 的高效双功能电催化剂。在高等离子体输入功率（200 W）下，Pt 和 Pd 的双金属氧化物合金纳米粒子或具有不同金属价态的纳米团簇被沉积在 TiCT 纳米片上。由于贵金属 NPs 和 TiCT 纳米片的协同作用，电催化结果表明，在等离子体输入功率为 200 W、时间为 3 min 的条件下制备的 PtO-PdO NPs@TiCT 纳米片仅需要施加较小的过电位即可在 0.5 M HSO 溶液中达到 10 mA cm 的 HER（-26.5 mV），在 0.1 M KOH 溶液中的 OER（1.54 V）。此外，使用该催化剂进行水分解反应，在 1.0 M KOH 溶液中仅需 1.53 V 的低电池电压即可实现 10 mA cm 的水分解电流密度。这些结果表明，通过 SP 将极其少量的 PtO/PdO NPs（1.07 μg cm）和 TiCT 纳米片杂交，将扩展其他清洁能源反应的应用范围，以实现可持续能源。
