无定形固体
氧化物
析氧
过渡金属
材料科学
氧还原反应
氧气
电催化剂
化学工程
纳米技术
碱土金属
金属
催化作用
化学
无机化学
光化学
电化学
物理化学
冶金
结晶学
有机化学
电极
工程类
作者
Baran Sarac,A. Sezai̊ Saraç
标识
DOI:10.1002/cctc.202400022
摘要
Transition metal oxides/hydroxides exhibit reasonable oxygen activity in alkaline electrolytes, and they have been identified as potential electrocatalysts. Some highly active transition metal oxides or hydroxides can alter their surface chemistry in response to the electrolyte environment. This review presents the performance of some of the recently developed transition metal‐based oxides in electrocatalytic oxygen evolution reaction (OER). Despite the promising catalytic activity of many transition metals and their alloys due to their incompletely filled d orbitals, their low corrosion resistance in alkaline media barriers their use as electrocatalysts. Metallic glasses (MGs), with their disordered atomic structure, have many unique and exciting properties that cannot be found in crystalline metals. Metallic glasses' unique chemical activity and corrosion resistance stem from their metastable and defective nature, as well as their structural and chemical homogeneity. In the case of Zr‐based MGs, the presence of MG–OHads and MG–Ox species on the surface for oxygen evolution enables rapid electron transfer to chemisorbed OH─ with an “activated” MG surface leading to the generation of an amorphous Zr‐rich layer. Zr‐rich oxide layer formation favors the OER understood by decreased Tafel slope and highly stable nature during open circuit potential measurements in the alkaline solution.
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