Hierarchical hetero-Ni3Se4@NiFe LDH micro/nanosheets as efficient bifunctional electrocatalysts with superior stability for overall water splitting†,Nanoscale Horizons

当前位置： X-MOL 学术 › Nanoscale Horiz. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Hierarchical hetero-Ni3Se4@NiFe LDH micro/nanosheets as efficient bifunctional electrocatalysts with superior stability for overall water splitting†
Nanoscale Horizons ( IF 8.0 ) Pub Date : 2019-04-12 00:00:00 , DOI: 10.1039/c9nh00177h
Tao Zhang _{1,

2,

3,

4,

5} , Lifeng Hang _{4,

5,

6,

7,

8} , Yiqiang Sun _{1,

2,

3,

4,

5} , Dandan Men _{1,

2,

3,

4,

5} , Xinyang Li _{1,

2,

3,

4,

5} , Lulu Wen _{1,

2,

3,

4,

5} , Xianjun Lyu _{5,

9,

10,

11} , Yue Li _{1,

2,

3,

4,

5}

Affiliation

Hierarchical hetero-Ni₃Se₄@NiFe LDH (layered double hydroxide) micro/nanosheets were prepared by coupling NiFe LDH nanosheets with Ni₃Se₄ micro-sized sheets, and could be used as effective bifunctional electrocatalysts for water splitting. Benefiting from the strong electronic interaction between the NiFe LDH nanosheets and Ni₃Se₄ micro-sized sheets, the hierarchical hetero-Ni₃Se₄@NiFe LDH micro/nanosheets are endowed with enhanced charge transfer and reaction kinetics. As a result, the obtained hierarchical hetero-Ni₃Se₄@NiFe LDH/CFC (carbon fiber cloth) electrode shows optimized hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) properties in alkaline medium with a small overpotential of 85 mV and 223 mV at the current density of 10 mA cm⁻², respectively. When the hierarchical hetero-Ni₃Se₄@NiFe LDH/CFCs are used as bifunctional electrodes for overall water splitting in a two-electrode electrolyzer, the current density of 10 mA cm⁻² is derived at a cell voltage of 1.54 V. Moreover, due to the stability of the novel hierarchical hetero-micro/nanostructure, the as-prepared Ni₃Se₄@NiFe LDH/CFC exhibited high stability in the electrochemical processes over 100 h. This work highlights the importance of constructing efficient bifunctional electrocatalysts for overall water splitting by rational design of heterostructures.

中文翻译：

分层杂化Ni ₃ Se ₄ @NiFe LDH微米/纳米片是高效的双功能电催化剂，具有优异的整体水分解稳定性†

通过将NiFe LDH纳米片与Ni ₃ Se ₄微米级片耦合，制备了分层的杂Ni ₃ Se ₄ @NiFe LDH（层状双氢氧化物）微米/纳米片，可以用作水分解的有效双功能电催化剂。得益于NiFe LDH纳米片与Ni ₃ Se ₄微米片之间的强电子相互作用，分层的Ni ₃ Se ₄ @NiFe LDH微米/纳米片具有增强的电荷转移和反应动力学。结果，获得了分层的杂Ni ₃ Se _4。@NiFe LDH / CFC（碳纤维布）电极在10 mA cm ^-2的电流密度下在弱电势为85 mV和223 mV的碱性介质中显示出优化的氢气释放反应（HER）和氧气释放反应（OER）性能，分别。当在两电极电解槽中将分层的杂Ni ₃ Se ₄ @NiFe LDH / CFCs用作双功能电极以进行总水分解时，在单元电压为1.54 V时得出10 mA cm ^-2的电流密度。，由于新型分层异质微/纳米结构的稳定性，所制备的Ni ₃ Se ₄NiFe LDH / CFC在100小时的电化学过程中表现出很高的稳定性。这项工作强调了通过合理设计异质结构来构建有效的双功能电催化剂对整体水分解的重要性。

更新日期：2019-04-12

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南