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通过化学蚀刻处理的普鲁士蓝型氧进化电催化剂的增强活性和酸 pH 稳定性

Lijuan Han¹, Pengyi Tang^2,3, Álvaro Reyes-Carmona¹

¹Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST) , Av. Paisos Catalans, 16,. Tarragona E-43007, Spain.

Journal of the American Chemical Society

|December 15, 2016

概括

研究人员开发了丰富的铁普鲁士蓝色电催化剂,在广泛的pH范围内有效氧化水. 这些催化剂表现出卓越的性能和稳定性,进步了人工光合作用技术.

科学领域:

电化学
材料科学
催化剂

背景情况:

从地球上丰富的金属中开发高效,可扩展的氧化电催化剂对于人工光合作用至关重要.
现有的催化剂通常在中性或酸性条件下扎,并且需要高的超电位.

研究的目的:

报告一种用于氧化水的新型异金属桥式电催化剂.
在包括酸性介质在内的广泛pH范围内实现高活性和稳定性.

主要方法:

通过化学蚀刻的铁普鲁士蓝型薄膜 Co ((OH) _1.0(CO₃) _0.5·nH₂O 纳米晶体.
电化学,光谱和结构特征.

主要成果:

与同类材料相比,制造的薄膜具有显著的催化性能.
催化剂在中性,基性和酸性条件下表现出卓越的活性,稳定性和耐腐蚀性 (pH1-13).
性能与最先进的金属氧化物催化剂相美,特别是在具有挑战性的酸性介质中.

结论:

铁普鲁士蓝型薄膜是一种高效的氧化水电催化剂.
催化剂和电极表面之间的优化界面匹配有助于优越的电催化活性.
这种进步为低成本,高效的人工光合作用提供了有前途的途径.

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Electrodeposition

Electrodeposition

Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...