Yu Xianqiang, Xia Mingze, Qi Ruikai, Wang Yuezhu, Gao Mingbin, Zhong Mengxiao, Lu Xiaofeng
Alan G. MacDiarmid Institute, College of Chemistry, Jilin University Changchun 130012 P. R. China
State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 China
Chem Sci. 2025 Apr 28. doi: 10.1039/d5sc00248f.
Interfacial engineering of a heterostructured electrocatalyst is an efficient way to boost hydrogen production, yet it still remains a challenging task to achieve superior performance at ampere-grade current density. Herein, a nanofibrous Ru/CrO heterojunction is prepared for alkaline/acid-universal hydrogen evolution. Theoretical calculations reveal that the introduction of CrO modulates the electronic structure of Ru, which is beneficial for *H desorption, resulting in a superior HER performance at ampere-grade current density. Accordingly, the resultant Ru/CrO catalyst presents an ultra-low overpotential of only 88 mV and a long-term stability of 300 h at 1 A cm in 1 M KOH. Furthermore, it also exhibits a small overpotential of 112 mV and steadily operates for 300 h at 1 A cm in 0.5 M HSO. The catalyst outperforms not only the benchmark Pt/C catalyst but also most of the top-performing catalysts reported to date. This study offers a novel conceptual approach for designing highly efficient electrocatalysts that hold significant promise for industrial-scale water splitting applications.
异质结构电催化剂的界面工程是提高产氢效率的有效方法，但在安培级电流密度下实现优异性能仍然是一项具有挑战性的任务。在此，制备了一种纳米纤维状的Ru/CrO异质结用于碱性/酸性通用析氢。理论计算表明，CrO的引入调节了Ru的电子结构，这有利于*H脱附，从而在安培级电流密度下具有优异的析氢性能。因此，所得的Ru/CrO催化剂在1 M KOH中于1 A cm下呈现出仅88 mV的超低过电位和300 h的长期稳定性。此外，它在0.5 M HSO中于1 A cm下也表现出112 mV的小过电位并稳定运行300 h。该催化剂不仅优于基准Pt/C催化剂，而且优于迄今为止报道的大多数高性能催化剂。这项研究为设计高效电催化剂提供了一种新颖的概念方法，对工业规模的水分解应用具有重大前景。
