电催化剂
过电位
双功能
分解水
塔菲尔方程
材料科学
析氧
石墨烯
化学工程
电解质
电化学
催化作用
电极
纳米技术
无机化学
化学
物理化学
有机化学
光催化
工程类
作者
Bin Jiang,Keming Liang,Zujin Yang,Kaiming Guo,Firdoz Shaik,Jianbin Zheng
标识
DOI:10.1016/j.electacta.2021.138459
摘要
The development of efficient, cost-effective, bifunctional and self-supported electrocatalysts for overall water splitting in a wide pH range is highly desirable. A novel and highly efficient electrocatalyst for overall water splitting in a wide pH range was synthesized via the electroless plating of FeCoNiB alloy nanoparticles on B-doped vertically aligned graphene arrays ([email protected]). [email protected] exhibited excellent electrocatalytic performances with a low overpotential of 31 mV in 1.0 M KOH and 148 mV in 0.5 M H2SO4 for hydrogen evolution reaction (HER), and an overpotential of 387 mV in 1.0 M KOH for oxygen evolution reaction (OER). It also exhibited a quite low Tafel slope value of 30 mV dec−1 and 51 mV dec−1 for HER and OER in 1.0 M KOH respectively. In addition, [email protected] also exhibited good long-term stabilities in acidic and alkaline electrolytes as a self-supported bifunctional electrocatalyst. This work may provide theoretical and technical support for design of cost-effective bifunctional electrocatalysts for overall water splitting in a wide pH range.
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