Atomic substructure engineering provides new opportunities for the designing newly and efficient catalysts with diverse atom ensembles, trimmed electron bands, and way‐out coordination environments, creating unique contributing to concertedly catalyze water oxidation, which is of great significance for proton exchange membrane water electrolysis (PEMWE). Herein, nest‐scheme RuIrLa nanocrystals with dense coherent interfaces as built‐in substructures are firstly fabricated by using commercial ZnO particles as acid‐removable templates, through a La‐stabilized coherent epitaxial growth of nanoparticles (NPs). The obtained nests exhibit a low overpotential of 198 mV at 10 mA cm−2, and the RuIrLa||Pt/C module equipped in PEMWE operates stably at a cell voltage potential of 1.69 V at 100 mA cm−2 in 0.5 M H2SO4 for 55 h, which is far beyond the current IrO2||Pt/C. Within the nests, the position at the interface shows high tensile/compressive strain, significantly reducing the OER activation energy. More importantly, the La termination‐stabilized coherent interfaces within the nests creates a unique self‐healing process for the outstanding long‐term stability. This work provides a promising substructure engineering to develop efficient catalysts with abundant substructures, such as coherent interfaces, dislocations, or grain boundaries, thereby realizing concerted improvement of activity and durability toward water oxidation.

中文翻译：

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Nest-Scheme RuIrLa 纳米晶体通过 NP 到 NP 定向组装：相干应变场驱动的能带结构分裂实现高效酸性水氧化


原子子结构工程为设计具有多样化原子系综、修剪电子带和出路配位环境的新型高效催化剂提供了新的机遇，为协同催化水氧化创造了独特的贡献，这对质子交换膜水电解具有重要意义。 PEMWE）。在此，首先使用商用 ZnO 颗粒作为酸可去除模板，通过 La 稳定的纳米粒子（NP）的相干外延生长来制备具有致密相干界面作为内置子结构的巢式 RuIrLa 纳米晶体。所获得的巢在 10 mA cm−2 下表现出 198 mV 的低过电势，并且 PEMWE 中配备的 RuIrLa||Pt/C 模块在 0.5 M H2SO4 中在 100 mA cm−2 下在 1.69 V 的电池电压下稳定运行。 55小时，远远超出了目前的IrO2||Pt/C。在巢内，界面位置显示出高拉伸/压缩应变，显着降低了 OER 活化能。更重要的是，巢内的La终端稳定相干界面创造了独特的自愈过程，以实现出色的长期稳定性。这项工作提供了一种有前景的子结构工程，可以开发具有丰富子结构（例如相干界面、位错或晶界）的高效催化剂，从而实现水氧化活性和耐久性的协同提高。