摘要
电催化氧化水包括析氧和析氢两个半反应(OER和HER),而其中合成高效廉价的催化剂则至关重要.合成了在碱性溶液中具有高活性、良好稳定性的非晶态Co(OH)2纳米材料用于析氧反应催化剂,实验证明该材料的性能可以和商用RuO 2相媲美.与目前商用的RuO 2催化剂相比,非晶态Co(OH)2材料的塔菲尔斜率较小,仅为67 mV/decade,且经过24 h的电流i-t曲线测试衰减较少.此外,该非晶态Co(OH)2纳米管的性能优于晶态Co(OH)2纳米管.因此,非晶态Co(OH)2纳米材料是一种很有前途的析氧反应催化剂.
Electrocatalytic oxidation of water comprises two oxygen and hydrogen evolution half reactions(OER and HER).Synthesis of efficient and inexpensive catalyst is critically important.Herein,An amorphous Co(OH)2 nanomaterial which exhibited high activity and long-term stability in alkaline media for OER was synthesized.The performance is competitive with that of commercial RuO 2.The amorphous Co(OH)2 had a small Tafel slope of 67 mV/decade,comparing with the state-of-the-art RuO 2 catalyst.This amorphous Co(OH)2 also displayed excellent durability by less decay after 24 h amperometric i-t curves test.Additionally,the performance of amorphous Co(OH)2 was better than that of crystal Co(OH)2 nanotube.Such features make amorphous Co(OH)2 a promising OER catalysis candidate.
作者
杨朵
高丽
杨敬贺
YANG Duo;GAO Li;YANG Jinghe(College of Chemistry and Chemical Engineering,Henan University,Kaifeng 475004,Henan,China;School of Chemical Engineering and Energy,Zhengzhou University,Zhengzhou 450001,Henan,China)
出处
《化学研究》
CAS
2019年第5期467-471,共5页
Chemical Research
基金
Supported by the National Natural Science Foundation of China(21403053,U1404503)
关键词
电催化
析氧反应
CO(OH)2
非晶体材料
lectrocatalysis
oxygen-evolution-reaction
Co(OH)2
amorphous materials
