分解水
材料科学
异质结
替代(逻辑)
对偶(语法数字)
离子
化学工程
纳米技术
催化作用
光电子学
化学
计算机科学
有机化学
文学类
工程类
艺术
光催化
程序设计语言
作者
Zepeng Lv,Jinshuai Fei,Yong‐Ouk You,Xuewei Lv,Qian Li,Jie Dang
标识
DOI:10.1016/j.jmst.2022.10.076
摘要
The exploration of novel, super-potent and low-cost electrocatalysts for water splitting has always been the kernel in the field of renewable sources. Herein, exfoliated Ti3C2Tx MXenes work as a substrate to vertically grow polypore N,Ni-Co2P nanoarrays (N,Ni-Co2P@TC) through an in situ interface-growth strategy and subsequent phosphorization and nitridation. The well-defined heterointerfaces with positive and negative ions co-modulation as coupled hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalysts for efficient overall water splitting are investigated, which possesses excellent durability even at a large current density (±500 mA cm-2). For HER, suitable H2O* and H* absorption energies and accelerated electronic transmission make N,Ni-Co2P@TC display a low overpotential of 27 mV at -10 mA cm-2 and Tafel slope of 38 mV dec‑1 in 1 mol/L KOH. For OER, the synergy of N,Ni-Co2P@TC with self-reconfiguration can give enhanced activity with a low overpotential of 232 mV at 10 mA cm-2 and a Tafel slope of 57 mV dec‑1. Additionally, the excellent bifunctional activity allows easily combining for efficient overall water splitting with a low driving voltage (1.51 V) at 10 mA cm-2, and the electrolyzer can be driven by a 1.5 V AAA battery.
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