过电位
塔菲尔方程
析氧
电催化剂
材料科学
化学工程
阳极
分解水
纳米颗粒
碳纤维
制氢
纳米技术
化学
氢
催化作用
电极
电化学
复合材料
有机化学
物理化学
光催化
复合数
工程类
作者
Cuihua Tian,M. Zhang,Wenjing Yan,Yan Qing,L. Li,Yiqiang Wu,Jiahui Li,Tai Yang
标识
DOI:10.1016/j.ijhydene.2023.04.258
摘要
Oxygen evolution reaction (OER) is considered the bottleneck that restricting the pace of electrocatalytic hydrogen production. Modulating structure and heterogeneous doping are essential approaches to effectively promote the electrocatalytic efficiency and stability. Herein, three-dimensional (3D) porous Cr doped NiFeP nanoparticles encapsulated in cellulose nanofibrils (CNF) carbon architecture (Cr–NiFeP/NC) with high-efficiency and durable OER performance was constructed. CNF played crucial role on the construction of 3D porous framework and promoting the OER performance significantly. Benefiting from the 3D porous structure, high specific surface area and exposed abundant active sites, the Cr–NiFeP/NC electrocatalyst displayed excellent OER performance, which the overpotential to deliver the current density of 10 mA cm−2 was only 249 mV with a Tafel slope of 51.2 mV dec−1 in 1.0 M KOH, outperforming the RuO2 and other reported electrocatalysts remarkably. In addition, the Cr–NiFeP/NC electrocatalyst exhibited outstanding stability, which the overpotential was only increased by 2.5% after 48 h chronopotential measurement to deliver a current density of 10 mA cm−2 with stable morphology and structure. This work demonstrated an integrated strategy of Cr doping and 3D porous structure modulating employed CNF as skeleton for the efficient and durable OER performance, providing a spark for hydrogen production by water splitting.
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