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氮掺杂碳载体负载钌纳米颗粒及其电解水析氢性能研究
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Abstract:
金属–载体相互作用在调控金属纳米颗粒的电子结构及其稳定金属纳米颗粒方面发挥着关键作用。本研究以具有独特空腔结构的葫芦[6]脲(CB6)为前驱体，通过水热合成结合高温热解的策略，成功制备了氮掺杂碳负载钌纳米颗粒催化剂(Ru/CN)。系统研究了合成过程中前驱体不同处理工艺及不同煅烧温度对材料结构和电催化析氢性能的影响。电化学测试结果表明，所制备的Ru/CN催化剂在碱性电解液中表现出优异的析氢反应性能，达到10 mA cm–2电流密度时仅需12 mV的过电位，且在10 mA cm–2恒定电流密度下连续电解220小时后仍保持优异的催化稳定性，展现出显著的性能优势。这一发现为设计高效稳定的HER电催化剂提供了新的思路和实验依据。
Metal-support interaction is vital of modulating electronic structure of metal nanoparticles as well as stabilizing these nanoparticles. In this study, nitrogen-doped carbon-loaded ruthenium nanoparticle catalysts (Ru/CN) were successfully prepared by hydrothermal synthesis combined with high-temperature pyrolysis strategy using cucurbit [6] uril (CB6), which has a unique cavity structure, as a precursor. The effects of different treatment processes of precursors and different calcination temperatures on the structure and electrocatalytic hydrogen reaction performance of the materials during the synthesis were systematically investigated. The electrochemical test results showed that the prepared Ru/CN catalyst exhibited excellent hydrogen reaction performance in alkaline electrolyte, requiring only 12 mV overpotential to reach 10 mA cm？2 current density, and maintained excellent catalytic stability after 220 h of continuous electrolysis at a constant current density of 10 mA cm？2, demonstrating significant performance advantages. This finding provides a new idea and experimental basis for the design of efficient and stable HER electrocatalysts.
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