氧化钨锚定的 Ru 团簇具有富电子和耐腐蚀的微环境，可实现高效、稳健的海水分解,SusMat

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氧化钨锚定的 Ru 团簇具有富电子和耐腐蚀的微环境，可实现高效、稳健的海水分解
SusMat ( IF 18.7 ) Pub Date : 2023-10-19 , DOI: 10.1002/sus2.164
Yiming Zhang ₁ , Weiqiong Zheng ₁ , Huijuan Wu ₁ , Ran Zhu ₁ , Yinghan Wang ₁ , Mao Wang _{1,

2} , Tian Ma ₁ , Chong Cheng ₁ , Zhiyuan Zeng _{3,

4} , Shuang Li ₁

Affiliation

钌 (Ru) 已被认为是水分解制氢过程中替代铂催化剂的潜在候选者。然而，最大限度地降低Ru含量、优化Ru位点的水解离能以及增强长期稳定性是非常必要的，但仍然面临着巨大的挑战。在这里，我们报告了如何创建氧化钨锚定的 Ru 团簇 (Ru-WO _x )，该团簇具有富电子且耐腐蚀的微环境，可实现高效、稳健的海水分解。受益于氧化钨载体中丰富的氧空位结构，Ru-WO _x在界面处表现出强的 Ru-O 和 Ru-W 键。我们的研究表明，Ru-WO _x中强的 Ru-O 键可能会加速水的解离动力学，而 Ru-W 键将导致强的金属-载体相互作用以及电子从 W 转移到 Ru。最佳Ru-WO _x^{催化剂在碱性和海水介质中在10 mA cm -2}的电流密度下分别表现出29和218 mV的低过电势。优异的长期稳定性表明Ru-WO _x催化剂在海水电解中具有高效的耐腐蚀性。我们相信，这项工作为富电子和耐腐蚀微环境在钌基催化剂中的重要作用提供了新的见解，并为设计用于海水分解的高效且坚固的阴极提供了新途径。

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Tungsten oxide-anchored Ru clusters with electron-rich and anti-corrosive microenvironments for efficient and robust seawater splitting

Ruthenium (Ru) has been recognized as a prospective candidate to substitute platinum catalysts in water-splitting-based hydrogen production. However, minimizing the Ru contents, optimizing the water dissociation energy of Ru sites, and enhancing the long-term stability are extremely required, but still face a great challenge. Here, we report on creating tungsten oxide-anchored Ru clusters (Ru–WO_x) with electron-rich and anti-corrosive microenvironments for efficient and robust seawater splitting. Benefiting from the abundant oxygen vacancy structure in tungsten oxide support, the Ru–WO_x exhibits strong Ru–O and Ru–W bonds at the interface. Our study elucidates that the strong Ru–O bonds in Ru–WO_x may accelerate the water dissociation kinetics, and the Ru–W bonds will lead to the strong metal–support interaction and electrons transfer from W to Ru. The optimal Ru–WO_x catalysts exhibit a low overpotential of 29 and 218 mV at the current density of 10 mA cm⁻² in alkaline and seawater media, respectively. The outstanding long-term stability discloses that the Ru–WO_x catalysts own efficient corrosion resistance in seawater electrolysis. We believe that this work offers new insights into the essential roles of electron-rich and anti-corrosive microenvironments in Ru-based catalysts and provide a new pathway to design efficient and robust cathodes for seawater splitting.

更新日期：2023-10-19

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