用于和氧进化反应的氧化电催化剂的进化定向电沉积
Gillian Collins1, Daniele Alves1, Tara Barwa1
1Department of Chemistry, Maynooth University, Maynooth, Co. Kildare W23F2H6, Ireland.
概括
开发了一种新型的化/氧化物复合电催化剂,用于高效的水分离. 这种具有成本效益的材料对和氧的演变反应具有有前途的活性和稳定性,这对于可再生能源的应用至关重要.
科学领域:
- 电化学
- 材料科学
- 可再生能源
背景情况:
- 全球对可再生能源的日益重视推动了对高效能源转换技术的研究.
- 电化学分水是产生清洁燃料的关键过程.
研究的目的:
- 开发一种简单,具有成本效益的电催化剂,用于进化反应 (HER) 和氧进化反应 (OER).
- 为了研究电沉积化/氧化复合物的性能和稳定性.
主要方法:
- 通过从水溶液到玻璃碳基质的电沉积制造二/氧化物复合物.
- 沉积条件的优化,特别是400秒的固定电位为-1.2V与Ag/AgCl.
- 电化学表征包括活性表面积测量和HER和OER的超电位测定.
主要成果:
- 由演化反应影响的电沉积过程产生了等级的,类似花的形态.
- 电催化剂具有显著的电化学活性表面积 (KOH为89厘米,H2SO4为72厘米).
- 在性 (KOH) 和酸性 (H2SO4) 介质中观察到高效的HER,其超电位分别为305mV和205mV,在KOH中具有良好的OER活性.
- 该材料在24小时内表现出优异的稳定性,在稳定性测试后增强了OER活动.
结论:
- 开发的化/氧化物复合物是HER和OER的高效和稳定的电催化剂.
- 层次的形态和优化的组成有助于优越的电化学性能.
- 这种具有成本效益的材料为推进可再生能源系统的电化学水分解提供了可行的解决方案.
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