Boosting Hydrogen Evolution through the Interface Effects of Amorphous NiMoO4–MoO2 and Crystalline Cu,ACS Omega

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Boosting Hydrogen Evolution through the Interface Effects of Amorphous NiMoO4–MoO2 and Crystalline Cu
ACS Omega ( IF 3.7 ) Pub Date : 2022-01-03 , DOI: 10.1021/acsomega.1c05844
Yue Yao ₁ , Enlai Hu ₁ , Zhiyu Wang ₁ , Yuanjing Cui ₁ , Guodong Qian ₁

Affiliation

The rational design and synthesis of a highly efficient and cost-effective electrocatalyst for hydrogen evolution reaction (HER) are of great importance for the efficient generation of sustainable energy. Herein, amorphous/crystalline heterophase Ni–Mo–O/Cu (denoted as a/c Ni–Mo–O/Cu) was synthesized by a one-pot electrodeposition method. Thanks to the introduction of metallic Cu and the formation of amorphous Ni–Mo–O, the prepared electrocatalyst exhibits favorable conductivity and abundant active sites, which are favorable to the HER progress. Moreover, the interfaces consisting of Cu and Ni–Mo–O show electron transfers between these components, which might modify the absorption/desorption energy of H atoms, thus accelerating HER activity. As expected, the prepared a/c Ni–Mo–O/Cu possesses excellent HER performance, which affords an ultralow overpotential of 34.8 mV at 10 mA cm^–2, comparable to that of 20 wt % Pt/C (35.0 mV), and remarkable stability under alkaline conditions.

中文翻译：

通过无定形 NiMoO4-MoO2 和结晶 Cu 的界面效应促进氢析出

合理设计和合成用于析氢反应（HER）的高效且具有成本效益的电催化剂对于高效生产可持续能源具有重要意义。在此，通过一锅电沉积法合成了非晶/结晶异相 Ni-Mo-O/Cu（表示为 a/c Ni-Mo-O/Cu）。由于金属Cu的引入和非晶态Ni-Mo-O的形成，制备的电催化剂表现出良好的导电性和丰富的活性位点，有利于HER的发展。此外，由 Cu 和 Ni-Mo-O 组成的界面显示出这些组分之间的电子转移，这可能会改变 H 原子的吸收/解吸能，从而加速 HER 活性。正如预期的那样，制备的 a/c Ni-Mo-O/Cu 具有优异的 HER 性能，^–2，与 20 wt % Pt/C (35.0 mV) 相当，在碱性条件下具有显着的稳定性。

更新日期：2022-01-18

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