Cost-Effective Vertical Carbon Nanosheets/Iron-Based Composites as Efficient Electrocatalysts for Water Splitting Reaction
Cost-Effective Vertical Carbon Nanosheets/Iron-Based Composites as Efficient Electrocatalysts for Water Splitting Reaction
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具有成本效益的垂直碳纳米片/铁基复合材料作为水分解反应的高效电催化剂
DOI：
10.1021/acs.chemmater.8b01699
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发表时间：
2018-07-24
影响因子：
8.6
通讯作者：
Zhu, Jixin
中科院分区：
文献类型：
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作者：
Zhang, Yao;Rui, Kun;Zhu, Jixin
开发低成本和高活性的催化剂是实现高效的电化学水分解制氢的关键，这被认为是一种非常有前途的可再生能源储存方法。本文设计并合成了一种由垂直排列的碳纳米片（VCNs）和氢氧化铁/氮化铁（VCNs@FeOOH//VCNs@Fe4N）构成的高效、经济的碱性介质水裂解电极结构。得益于高度暴露的活性位点、加速的质量和电子传递以及多组分的协同效应，复合电极具有前所未有的高活性和优异的耐用性。VCNs@FeOOH复合电极在10 mA cm-2下析氧反应（OER）的过电位低至179 mV，而VCNs@Fe4N在10 mA cm-2下析氢反应（HER）的过电位低至172 mV。更重要的是，一个完整的电解槽电池VCNs@Fe4N作为阴极…
Developing low-cost and highly active catalysts is vital to achieve efficient electrochemical water splitting for hydrogen production, which is considered as a very promising approach for renewable energy storage. Herein, an efficient and cost-effective electrode architecture constructed by vertically aligned carbon nanosheets (VCNs) and iron oxyhydroxide/nitride (VCNs@FeOOH//VCNs@Fe4N) is designed and synthesized for water splitting in alkaline medium. Benefiting from the highly exposed active sites, accelerated mass and electron transport, and synergistic effect of multiple components, the composite electrodes deliver unprecedented catalytic performance with high activity and excellent durability. The VCNs@FeOOH composite electrode exhibits an overpotential of as low as 179 mV at 10 mA cm–2 for oxygen evolution reaction (OER), while VCNs@Fe4N shows a low overpotential of 172 mV for hydrogen evolution reaction (HER) at 10 mA cm–2. More significantly, a full electrolyzer cell with VCNs@Fe4N as the cathode...