过电位
电催化剂
析氧
异质结
分解水
甘油
材料科学
氢
无机化学
化学
化学工程
催化作用
电化学
电极
物理化学
光催化
有机化学
光电子学
工程类
作者
Zhou Yang,Hongwei Niu,L. Xia,Le Li,Meng Xiang,Chengbin Yu,Zhiqian Zhang,Shuang Dong
标识
DOI:10.1016/j.ijhydene.2023.05.058
摘要
Electrocatalytic water splitting is regarded as the most efficient way of producing novel hydrogen energy, but is suffering from high overpotential and sluggish kinetics of oxygen evolution reaction (OER). Some organics including glycerol have been added to ameliorate the shortcomings of OER, but the selectivity of electrocatalysts is of great importance. Herein, a rare-earth metal Eu3O4/WOx heterojunction with nonstoichiometric O is designed and prepared, the Eu3O4/WO2.72 stands out from the crowd for which shows the best electrocatalytic performances that the glycerol oxidation reaction (GOR) potential is only 1.33 V at 10 mA cm−2. In addition, Eu3O4/WO2.92 and Eu3O4/WO2.72 show low overpotentials of 141 mV and 129 mV at 10 mA cm−2 for hydrogen evolution reaction (HER) compared with the benchmark Pt/C electrocatalyst. Eu3O4/WO2.72 heterojunction shows an ultralow cell voltage of 1.17 V in 1 M KOH with 0.1 M glycerol. Our study opens up a fashion-forward way for the designation of rare-earth metal heterojunction electrocatalysts in the biodiesel glycerol oxidation linking to hydrogen evolution.
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