Heterostructure construction has become increasingly recognized as an effective strategy to enhance oxygen evolution reaction (OER) performance due to the exposed active surfaces and improved mass/charge transfer. Inspired by natural plant structures, this study develops a unique moss-like amorphous/crystalline (CoB/CeO₂) heterojunction. This distinctive moss-like morphology facilitates the formation of staggered sheet structures in the catalyst, providing more active sites and open channels for reaction intermediates and gas release. Benefiting from the hydrophilic properties offered by the moss-like morphology, CoB/CeO₂ exhibits excellent OER catalytic performance in 1 M KOH, requiring only 247 mV at 100 mA cm⁻². Physicochemical characterization and mechanistic studies reveal that the close nanoscale features between CoB and CeO₂ create abundant binary interfaces, optimize the electronic configuration, induce changes in electronic states, and provide abundant defect sites, thereby enhancing charge transfer capabilities. This work presents a new paradigm for the design of efficient and durable OER electrocatalysts.

中文翻译：

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一种类似苔藓的 CoB/CeO2 异质结作为碱性条件下析氧反应的高效电催化剂


由于暴露的活性表面和改善的质量/电荷转移，异质结构已越来越被认为是提高析氧反应 （OER） 性能的有效策略。受自然植物结构的启发，本研究开发了一种独特的苔藓状非晶/结晶 （CoB/CeO₂） 异质结。这种独特的苔藓状形态有助于在催化剂中形成交错的片状结构，为反应中间体和气体释放提供更多的活性位点和开放通道。得益于苔藓状形态提供的亲水性，CoB/CeO₂ 在 1 M KOH 中表现出优异的 OER 催化性能，在 100 mA ^cm-2 时仅需要 247 mV。物理化学表征和机理研究表明，CoB 和 CeO₂ 之间接近的纳米级特征创造了丰富的二进制界面，优化了电子构型，诱导了电子状态的变化，并提供了丰富的缺陷位点，从而增强了电荷转移能力。这项工作为设计高效耐用的 OER 电催化剂提供了一种新的范式。