期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 47, 期 60, 页码 25081-25089出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.05.268
关键词
Metal nitride; Electrocatalysis; Hydrogen evolution reaction; Urea oxidation reaction
资金
- National Natural Science Foundation of China [22002068, 51772162, 52072197]
- China Postdoctoral Science Foundation [2021M691700]
- Youth Innovation and Technology Foundation of Shandong Higher Education Institutions, China [2019KJC004]
- Outstanding Youth Foundation of Shandong Province, China [ZR2019JQ14]
- Taishan Scholar Young Talent Program [tsqn201909114]
- Major Scientific and Technological Innovation Project [2019JZZY020405]
- Natural Science Foundation of Shandong Province [ZR2020ZD09]
- Natural Science Foundation of Shandong Province of China [ZR2019BB002, ZR2018BB031]
In this study, Ru-doped 3D porous Ni3N spheres were synthesized as urea oxide electrocatalyst. The catalyst exhibited good bifunctional catalytic performance for hydrogen evolution and oxygen evolution reactions with low overpotentials. It also showed good electrocatalytic performance in neutral and alkaline seawater electrolytes. Furthermore, the catalyst demonstrated extraordinary catalytic activity and stability toward urea oxide. It can be powered by sustainable energy sources such as wind, solar, and thermal energies.
Developing efficient, stable and ideal urea oxide (UOR) electrocatalyst is key to produce green hydrogen in an economical way. Herein, Ru doped three dimensional (3D) porous Ni3N spheres, with tannic acid (TA) and urea as the carbon and nitrogen resources, is synthesized via hydrothermal and low-temperature treated process (Ru-Ni3N@NC). The porous nanostructure of Ni3N and the nickel foam provide abundant active sites andchannel during catalytic process. Moreover, Ru doping and rich defects favor to boost thereaction kinetics by optimizing the adsorption/desorption or dissociation of intermediatesand reactants. The above advantages enable RueNi(3)N@NC to have good bifunctional catalytic performance in alkaline media. Only 43 and 270 mV overpotentials are required forhydrogen evolution (HER) and oxygen evolution (OER) reactions to drive a current of10 mA cm(-2). Moreover, it also showed good electrocatalytic performance in neutral andalkaline seawater electrolytes for HER with 134 mV to drive 10 mA cm(-2 )and 83 mV to drive100 mA cm(-2), respectively. Remarkably, the as-designed RueNi3N@NC also ownsextraordinary catalytic activity and stability toward UOR. Moreover, using the synthesizedRueNi(3)N@NC nanomaterial as the anode and cathode of urea assisted water decomposition, a small potential of 1.41 V was required to reach 10 mA cm(-2). It can also be powered by sustainable energy sources such as wind, solar and thermal energies. In order to make better use of the earth's abundant resources, this work provides a new way to develop multifunctional green electrocatalysts. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved
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