Sun Huachuan, Chen Mingpeng, Xiao Bin, Zhou Tong, Humayun Muhammad, Li Linfeng, Lu Qingjie, He Tianwei, Zhang Jin, Bououdina Mohammed, Wang Chundong, Liu Qingju
National Center for International Research on Photoelectric and Energy Materials, Yunnan Key Laboratory for Micro/Nano Materials & Technology, School of Materials and Energy, Yunnan University, Kunming, 650091, China.
Energy, Water, and Environment Lab, College of Humanities and Sciences, Prince Sultan University, Riyadh, 11586, Saudi Arabia.
Small. 2023 Dec;19(49):e2303974. doi: 10.1002/smll.202303974. Epub 2023 Aug 17.
Exploring highly efficient hydrogen evolution reaction (HER) electrocatalysts for large-scale water electrolysis in the full potential of hydrogen (pH) range is highly desirable, but it remains a significant challenge. Herein, a simple pathway is proposed to synthesize a hybrid electrocatalyst by decorating small metallic platinum (Pt) nanosheets on a large nickel telluride nanosheet (termed as Pt /NiTe-Ns). The as-prepared Pt /NiTe-Ns catalyst only requires overpotentials of 72, 162, and 65 mV to reach a high current density of 200 mA cm in alkaline, neutral and acidic conditions, respectively. Theoretical calculations reveal that the combination of metallic Pt and NiTe-Ns subtly modulates the electronic redistribution at their interface, improves the charge-transfer kinetics, and enhances the performance of Ni active sites. The synergy between the Pt site and activated Ni site near the interface in Pt /NiTe-Ns promotes the sluggish water-dissociation kinetics and optimizes the subsequent oxyhydrogen/hydrogen intermediates (OH*/H*) adsorption, accelerating the HER process. Additionally, the superhydrophilicity and superaerophobicity of Pt /NiTe-Ns facilitate the mass transfer process and ensure the rapid desorption of generated bubbles, significantly enhancing overall alkaline water/saline water/seawater electrolysis catalytic activity and stability.
探索在全氢（pH）范围内用于大规模水电解的高效析氢反应（HER）电催化剂是非常必要的，但这仍然是一项重大挑战。在此，提出了一种简单的途径，通过在大尺寸碲化镍纳米片上修饰小尺寸金属铂（Pt）纳米片来合成一种混合电催化剂（称为Pt /NiTe-Ns）。所制备的Pt /NiTe-Ns催化剂在碱性、中性和酸性条件下分别仅需72、162和65 mV的过电位即可达到200 mA cm的高电流密度。理论计算表明，金属Pt和NiTe-Ns的结合巧妙地调节了它们界面处的电子重新分布，改善了电荷转移动力学，并增强了Ni活性位点的性能。Pt /NiTe-Ns中界面附近的Pt位点和活化的Ni位点之间的协同作用促进了缓慢的水离解动力学，并优化了随后的氧氢/氢中间体（OH*/H*）吸附，加速了HER过程。此外，Pt /NiTe-Ns的超亲水性和超疏气性促进了传质过程，并确保了产生气泡的快速解吸，显著提高了整体碱性水/盐水/海水电解的催化活性和稳定性。
