Electrochemical splitting of water to hydrogen is widely considered as an efficient and sustainable solution to relieve the energy crisis. In this work, we report a facile dealloying method based on metallic glass (Ni₆₁Zr₃₆Mo₃) to introduce abundant oxygen vacancies (O_v) for the electrocatalytic hydrogen evolution reaction (HER). The corroded ribbons are composed of a sandwich-like structure with Ni–Mo–O nanoporous layer outside and raw metallic glass inside. This complex structure delivers a low overpotential of 71 ± 2.6 mV at −20 mA cm^–2_geo in 1.0 M KOH solution, a Tafel slope of 57 ± 3 mV dec^–1, and 100 h long-term stability for HER, which is much better than those of the crystallized counterpart, nanoporous Ni, and the commercial benchmark 20% Pt/C electrocatalyst. The high concentration of oxygen vacancies (71.5%), the alloying effect of Mo, and amorphous composition synergistically contribute to the superior electrocatalytic ability and enhanced reaction kinetic of nanoporous Ni–Mo–O, indicating it an excellent low-cost alternative for platinum in hydrogen production.

中文翻译：

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在非晶态纳米多孔Ni-Mo-O中脱氧产生氧空位以产生优异的电催化氢

将水电化学分解为氢被广泛认为是缓解能源危机的有效且可持续的解决方案。在这项工作中，我们报告了一种基于金属玻璃（Ni ₆₁ Zr ₃₆ Mo ₃）的简便脱合金方法，该方法可引入大量的氧空位（O _v）用于电催化放氢反应（HER）。腐蚀的碳带由类似三明治的结构组成，外部有Ni-Mo-O纳米多孔层，内部有生金属玻璃。这种复杂的结构在1.0 M KOH溶液中的−20 mA cm ^–2 _geo时提供71±2.6 mV的低过电势，Tafel斜率dec ^–1为57±3 mV，以及HER的100 h长期稳定性，这比结晶的对应物，纳米多孔Ni和市售基准20％Pt / C电催化剂要好得多。高浓度的氧空位（71.5％），Mo的合金化作用以及无定形成分协同作用，使纳米多孔Ni–Mo–O具有优异的电催化能力和增强的反应动力学，表明它是铂的极佳低成本替代品制氢。