过电位
塔菲尔方程
材料科学
化学工程
电催化剂
三元运算
合金
电化学
催化作用
纳米颗粒
纳米结构
纳米技术
冶金
化学
电极
物理化学
计算机科学
工程类
程序设计语言
生物化学
作者
Omid Mohammadi,Yaser Bahari,Ahmad Ahmadi Daryakenari,Fatemeh Jalali Koldeh,Xiaoran Zhang,Zhi Qun Tian,Pei Kang Shen
标识
DOI:10.1016/j.ijhydene.2022.08.087
摘要
Designing non-precious and long-lasting electrocatalysts with enhanced catalytic properties for hydrogen evolution reaction (HER) is a fundamental approach to address the needs for hydrogen industry and overcome the current challenges in sustainable energy generation. Herein, we present ternary NiCoP nanostructures synthesized through a direct and controlled electrochemical deposition at room temperature as highly efficient electrocatalysts for HER. Different Ni/Co ratios in the alloy were investigated resulting in different nanoarchitectured morphologies, chemical compositions and HER performances, in turn. The NiCoP–I alloy exhibited a nanoparticulated morphology comprising well-defined nanoparticles of ∼20–30 nm which evolved to nanoparticulated caps at prolonged electrodeposition times presenting a large electrochemical surface area of 526 cm 2 . The NiCoP–I electrocatalyst demonstrated a small Tafel slope of 49 mV dec −1 and an ultra-low overpotential of 68 mV vs. RHE at −10 mA cm −2 in alkaline solution which well rivals to that of Pt foil and outmatches its binary alloy counterparts. • Ternary NiCoP nanostructured electrocatalysts were directly electrodeposited. • The effects of electrodeposition conditions were deeply investigated. • A large ECSA was obtained for all prepared NiCoP electrocatalysts. • Synergistic effects were observed for Ni, Co and P in ternary catalysts. • Excellent HER activity and stability were achieved in alkaline solution.
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