析氧
催化作用
电解水
电解
电解质
电催化剂
化学
化学物理
化学能
材料科学
纳米技术
无机化学
物理化学
电化学
电极
生物化学
有机化学
作者
Aleksandar R. Žeradjanin,Praveen Narangoda,Justus Masa,Robert Schlögl
出处
期刊:ACS Catalysis
日期:2022-09-09
卷期号:12 (19): 11597-11605
被引量:34
标识
DOI:10.1021/acscatal.2c02964
摘要
Renewable energy storage via water electrolysis strongly depends on the design of electrified electrode–electrolyte interfaces at which electricity is converted into chemical energy. At the core of the hydrogen evolution reaction (HER) and the oxygen evolution reaction conversion efficiency are interfacial processes with complex dynamic mechanisms, whose further acceleration is practically impossible without a thorough fundamental understanding of electrocatalysis. Here, we communicate new experimental insights into HER, which will potentially further deepen our general understanding of electrocatalysis. Of special note is the very surprising observation that the most active metals (i.e., noble metals) for HER, which exhibit the lowest overpotentials at a defined current density, exhibit the highest activation energies in comparison to the other metals from the d-block. This suggests a major, if not dominant, impact of the frequency factor on activity trends and the need for deeper reconsideration of the origins of electrocatalytic activity.
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