缺氧的氧化物诱导电子和质子转移:在广泛的pH值和性海水中激活基站点以促进气演变
Bowen Zhou1, Hao Ding1, Wei Jin2
1Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Xueyuan Road, Haidian District, Beijing 100083, PR China.
Journal of colloid and interface science
|January 20, 2024
概括
一种新型的/氧化物电催化剂 (Ru/WO3-OV) 证明了在不同pH水平上高效的演化反应 (HER). 这种催化剂的性能超过了,为绿色生产提供了增强的活性和稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 开发高效的电催化剂,用于在广泛的pH范围内进行演化反应 (HER),对于可持续的生产至关重要.
- (Ru) 活跃点显示有希望,但需要在中性和性介质中增强水解离动力学.
- 金属氧化物,特别是带有氧空缺的氧化 (WO3) 与碳基材料相比,提供更高的电子动态.
研究的目的:
- 设计和合成一种新的Ru/WO3-OV电催化剂,以在广泛的pH频谱中提供高效的HER性能.
- 研究氧气空缺和金属支相互作用在增强催化活性和稳定性方面的作用.
- 为了比较开发的催化剂与商业基催化剂的性能.
主要方法:
- 使用简单的热水和低温回火工艺来制备Ru/WO3-OV催化剂.
- 用线性扫描电压测量等技术评估了电催化活性.
- 评估了各种电解质的性能,包括KOH,H2SO4,PBS和海水混合物.
主要成果:
- Ru/WO3-OV催化剂在不同的pH条件下 (例如,1M KOH中23mV,0.5M H2SO4中36mV) 实现了10mA cm-2的电流密度.
- Ru/WO3-OV的质量活性显著高 (7.7-7.86倍) 于20重%Pt/C在10mA cm-2在1M KOH和1M KOH+海水中.
- 增强的活性和稳定性归因于由金属支相互作用引起的电子修改.
结论:
- Ru/WO3-OV催化剂在广泛的pH范围内表现出卓越而稳定的HER性能,性能优于商业Pt/C.
- 氧气空缺和WO3支持的电子调制是激活Ru站点和提高催化效率的关键因素.
- 这项研究为设计用于高效生产的先进电催化剂提供了宝贵的见解.
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