塔菲尔方程
析氧
过电位
分解水
过渡金属
材料科学
掺杂剂
电化学
化学工程
石墨烯
电催化剂
纳米技术
兴奋剂
无机化学
催化作用
电极
化学
物理化学
光电子学
生物化学
光催化
工程类
作者
Sergio Battiato,Mario Urso,Anna Lucia Pellegrino,A. Terrasi,S. Mirabella
标识
DOI:10.1002/cnma.202400137
摘要
Abstract Green hydrogen production by water splitting holds great potential as a clean and renewable source of energy for sustainable energy solutions. However, the efficiency of this process is hampered by the sluggish oxygen evolution reaction (OER). Overcoming these kinetic hurdles requires the development of highly efficient electrocatalysts. This study explores the effect of transition metal doping on the electrocatalytic properties of Ni(OH) 2 microflowers towards alkaline OER. Transition metal‐doped Ni(OH) 2 microflowers, with highly porous structures due to interconnected nanosheets, are synthesized by a facile, cheap, and scalable chemical bath deposition (CBD), and combined with graphene paper (GP) substrates to fabricate electrodes. Through a systematic exploration of the relationship between the transition metal dopant element type (Mn, Fe, Co, Zn) or concentration and the consequent electrochemical properties, Co‐doping demonstrates improvement in the overpotential at a current density of 10 mA cm −2 (329 mV), Tafel slope (45 mV dec −1 ), and other key performance indicators of Ni(OH) 2 microflowers for OER. These results are attributed to the high number of active sites and their enhanced electrocatalytic activity benefiting from the presence of the transition metal dopant. The proposed strategy paves the way for the development of cost‐effective and highly efficient electrocatalysts for water splitting technologies.
科研通智能强力驱动
Strongly Powered by AbleSci AI