| 原始溶液中Ni、Co质量比对Ni-Co-S-O/NF催化剂在碱性水电解中析氧性能的影 | |
| Effect of Mass Ratio of Ni and Co in Initial Solution on Oxygen Evolution Reaction Performance of Ni-Co-S-O/NF Catalyst in Alkaline Water Electrolysis | |
| 摘要: 本文中主要研究了原始溶液中Ni、Co质量比（wNi∶wCo）对Ni-Co-S-O复合材料催化剂结构及性能的影响。采用水热法在泡沫镍（NF）基底上制备出了三维分层花瓣状纳米结构的Ni-Co-S-O复合材料催化剂。当原始溶液中wNi∶wCo=1∶2时，所制备的Ni-Co-S-O/NF（1∶2）催化剂具有更大的电化学活性面积（ECSA），在碱性水电解析氧过程中具有最好的电催化性能。在1 mol·L-1KOH碱性溶液中，Ni-Co-S-O/NF（1∶2）仅需61和313 mV的过电位，可分别获得10和100 mA·cm-2的电流密度，并且其Tafel斜率为155 mV·dec-1。Ni-Co-S-O/NF（1∶2）催化剂在碱性条件下100 mA·cm-2的恒定高电流密度下运行24 h后仍能保持片状结构，表现出良好的稳定性。 | |
| 关键词: Ni-Co-S-O/NF催化剂 碱性水电解 析氧反应 过渡金属 | |
| 基金项目: | |
| Abstract: In this paper, the effect of mass ratio of Ni and Co (wNi:wCo) in initial solution on the structure and properties of Ni-Co-S-O composite catalysts was studied. A three-dimensional petal-like and hierarchically connected nano-structured Ni-Co-S-O composite catalyst was obtained on a nickel foam (NF) substrate by a hydrothermal method. When w Ni:wCo=1:2, the prepared Ni-Co-S-O/NF(1:2) catalyst has a larger electrochemically active area (ECSA) and the best oxygen evolution reaction (OER) catalytic performance in alkaline water electrolysis. In 1 mol·L-1 KOH alkaline solution, Ni-Co-S-O/NF(1:2) only need 61 and 313 mV to achieve the current density of 10 and 100 mA·cm-2 respectively. At the same time, its Tafel slope was 155 mV·dec-1. After tested at a high current density of 100 mA·cm-2 for 24 h in the alkaline solution, the Ni-Co-S-O/NF(1:2) could still maintain sheet structure and displayed a good durability. | |
| Keywords: Ni-Co-S-O/NF catalyst alkaline water electrolysis oxygen evolution reaction transition metal | |
| 投稿时间：2020-11-24 修订日期：2021-01-20 | |
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| 杜芳,刘帅,古京九,王桁,李冰.原始溶液中Ni、Co质量比对Ni-Co-S-O/NF催化剂在碱性水电解中析氧性能的影[J].无机化学学报,2021,37(5):929-936. | |
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