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
电化学
催化作用
电极
纳米技术
碳纤维
兴奋剂
无机化学
化学
物理化学
有机化学
工程类
光催化
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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