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 [ Time:2018/1/22 ]
Researchers Develop An Efficient Electrocatalyst for Hydrogen Evolution Reaction at All pH Values
Author :SUN Yiqiang

Recently, a research team led by Prof. LI Yue in Institute of solid State Physics,  Institute of Solid State Physics, Hefei Institutes of Physical Science, CAS has revealed that the synthesized Mo doped Ni2P nanowire arrays showed excellent hydrogen evolution reaction (HER) performance at all pH Values.

With the rapidly increasing demands for energy resource and increased concern over environmental pollution, intense attention have been paid to search for clean alternatives as energy carrier, such as H2.

In the joint work, researchers demonstrate the successful synthesis of Mo-Ni2P nanowires (NWs) on a conductive Ni foam (NF) from NiMoO4 nanowire arrays precursor via a topotactic phosphidation conversion reaction for the first time. The effect of Mo atom on the Ni2P toward HER performance in different pH condition was investigated. They found that such Mo-Ni2P NWs/NF can be directly used as a working electrode and displayed a small overpotential of 78 mV to reach 10 mA cm-2 and long-time durability (>24 h) in 1 M KOH, which is superior than the most Co and Fe doped binary transition metal phosphides. They also exhibited excellent catalytic activity and stability toward neutral and acidic solutions.

In summary, the present work provides a valuable route for the design and synthesis of inexpensive and efficient all-pH HER electrocatalysts.

The findings were published online in Nanoscale entitled Mo doped Ni2P Nanowire Arrays: An Efficient Electrocatalyst for Hydrogen Evolution Reaction with Enhanced Activity at All pH Values and was selected the cover picture.

This investigation was supported by the Natural Science Foundation of China (Grant Nos. 51371165, 51571189), Anhui Provincial Natural Science Foundation (Grant No. 1508085JGD07), Cross-disciplinary Collaborative Teams Program in CAS, the CAS/SAFEA International Partnership Program for Creative Research Teams.

Figure 1. The cover picture of the Mo-Ni2P NWs/NF.(Image by SUN Yiqiang)

Figure 2. The LSV curve of the Mo-Ni2P NWs/NF for HER in (a) acidic, (b) neutral and (c) alkaline solution. (Image by SUN Yiqiang)

Contact:
LI Yue
 Institute of Solid State Physics, Hefei Institutes of Physical Science, CAS
E-mail: yueli@issp.ac.cn
Fax: +86-551-65591434

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