低pH电解水分解使用丰富的土壤转移稳定的催化剂,这些催化剂在现场自组装
Leanne G Bloor1, Pedro I Molina, Mark D Symes
1WestCHEM, School of Chemistry, University of Glasgow , University Avenue, Glasgow G12 8QQ, U.K.
Journal of the American Chemical Society
|February 7, 2014
概括
由丰富的过渡金属制成的电催化剂可以在酸性条件下分解水. 这些超稳定催化剂溶解和重塑,使得高效的和氧生产成为可能.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 贵金属催化剂 (例如,Pt,IrO2,RuO2) 是低pH水电解的标准,但价格昂贵且稀缺.
- 开发具有成本效益和丰富的催化剂对于电解生产的广泛采用至关重要.
研究的目的:
- 研究第一排过渡金属离子作为酸性介质中水电解的催化剂的使用.
- 探索利用其自然溶解性质的超稳定电催化剂的潜力.
主要方法:
- 在应用细胞偏差 (>2V) 的情况下,在pH 1.6的水性溶液中形成电极薄膜.
- 催化剂稳定性和氧气演变和质子减少24小时效率的表征.
- 对薄膜的超稳定性及其再溶解行为的分析.
主要成果:
- 在低pH值下形成的基电极薄膜在24小时以上的时间内表现出氧化演变和质子减小的稳定催化活性.
- 这些膜是超稳定的,在电路中断时重新溶解,同时发生气体演变.
- 观察到高法拉第效率接近于O2和H2生产的单位.
结论:
- 第一排过渡金属可以有效地通过利用它们固有的溶解来调解电解水在酸性介质中的分裂.
- 基于丰富元素的元稳电催化剂为各种电化学反应提供了对贵金属的有希望的替代品.
- 这种方法鼓励在特定条件下的催化应用中重新评估传统上被忽视的元素.
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