【摘要】 质子交换膜水电解（PEMWE）技术的高效运行亟需开发兼具高活性与强稳定性的酸性析氧反应（OER）催化剂。通过一步水热法成功制备了铋（Bi）掺杂二氧化钌（Bi-RuO₂）催化剂,旨在通过Bi的电子调控作用协同优化RuO₂的催化性能。半电池测试表明,Bi-RuO₂在10 mA/cm²的过电位为207mV（较RuO₂降低26%）,Tafel斜率降至67.4 mV/dec（对比纯RuO₂的97.5 mV/dec）,表明Bi掺杂显著加速催化反应动力学。恒电流测试（10和20 mA/cm²）中,催化剂稳定运行100 h。在PEM电解池中,基于Bi-RuO₂的膜电极（Ru载量1.0 mg/cm²）于1.82 V实现2 000 mA/cm²电流密度,并在150 h运行中保持稳定（衰减率97.6μV/h）。提出的催化剂制备方法和性能优化思路为开发低成本、高活性的PEM电解水析氧反应催化剂提供了较为重要的研究参考价值。更多还原

【Abstract】 The efficient operation of proton exchange membrane water electrolysis（PEMWE） urgently requires the development of acidic oxygen evolution reaction（OER） catalysts that integrate high activity and robust stability.Herein,a bismuth-doped ruthenium dioxide（Bi-RuO₂） catalyst is successfully synthesized via a one-step hydrothermal method,aiming to synergistically optimize the catalytic performance of RuO₂ through electronic modulation induced by Bi incorporation.OER tests reveal that Bi-RuO₂ exhibits an overpotential of 207 mV at 10 mA/cm²（26% lower than RuO₂）and a Tafel slope of 67.4 mV/dec（lower than the 97.5 mV/dec for RuO₂）,indicating that Bi doping significantly accelerates the catalytic reaction kinetics.During galvanostatic testing（10/20 mA/cm²）,the catalyst maintains stable operation for 100 h.In a PEM electrolyzer,the membrane electrode based on Bi-RuO2（Ru loading:1.0 mg/cm²） achieves a current density of 2 000 mA/cm² at 1.82 V and remains stable over 150 h of operation（decay rate:97.6 μV/h）.The catalyst preparation method and performance optimization strategy proposed in this study provide valuable insights for developing low-cost,highly active OER catalysts for PEM water electrolysis.更多还原