FeNi3–FeNi3N – a high-performance catalyst for overall water splitting,Sustainable Energy & Fuels

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FeNi3–FeNi3N – a high-performance catalyst for overall water splitting
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-11-03 , DOI: 10.1039/d0se01491e
Shuqin Liang _{1,

2,

3,

4,

5} , Meizan Jing _{5,

6,

7,

8,

9} , Tiju Thomas _{10,

11,

12,

13,

14} , Jian Liu _{5,

6,

7,

8,

9} , Haichuan Guo _{1,

2,

3,

4,

5} , J. Paul Attfield _{15,

16,

17,

18} , Ali Saad _{1,

2,

3,

4,

5} , Hangjia Shen _{1,

2,

3,

4,

5} , Minghui Yang _{1,

2,

3,

4,

5}

Affiliation

Solid State Functional Materials Research Laboratory
Ningbo Institute of Materials Technology and Engineering
Chinese Academy of Sciences
Ningbo 315201
China
State Key Laboratory of Heavy Oil Processing
Beijing Key Lab of Oil & Gas Pollution Control
China University of Petroleum
Beijing 102249
Department of Metallurgical and Materials Engineering
DST Solar Energy Harnessing Center
Indian Institute of Technology Madras
Chennai 600036
India
Centre for Science at Extreme Conditions
School of Chemistry University of Edinburgh
Edinburgh
UK

The design and development of non-precious metal catalysts with high activity and stability for overall water splitting remains a major challenge. Herein, lamellar FeNi₃N incorporated by FeNi₃ is synthesized via thermal ammonolysis. The abundance of hollow sites in this FeNi₃–FeNi₃N heterostructure significantly enhances the intrinsic activity towards hydrogen evolution reaction, while the heterostructure also offers high electrochemical active surface area for oxygen evolution reaction. FeNi₃–FeNi₃N enables a lower overpotential for both hydrogen and oxygen evolution electrocatalysis in alkaline media. When FeNi₃–FeNi₃N is employed as a bifunctional material for overall water splitting, it shows a cell voltage of only 1.5 V at 10 mA cm⁻² and offers stable performance for up to 48 h at current densities of ∼40 mA cm⁻².

中文翻译：

FeNi3–FeNi3N –用于整体水分解的高性能催化剂

对于整个水分解具有高活性和稳定性的非贵金属催化剂的设计和开发仍然是主要的挑战。这里，层状的FeNi ₃由铁-镍合金并入Ñ ₃合成通过热氨解。FeNi ₃ -FeNi ₃ N异质结构中大量的空心位点显着增强了对氢析出反应的内在活性，而异质结构还为氧析出反应提供了高电化学活性表面积。FeNi ₃ -FeNi ₃ N使碱性介质中的氢和氧逸出电催化作用的过电位降低。当FeNi ₃ –FeNi₃ N被用作用于整体水分解的双功能材料，它在10 mA cm^-2时仅显示1.5 V的电池电压，并且在约40 mA cm^-2的电流密度下可提供长达48小时的稳定性能。

更新日期：2020-11-09

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