CeO2 nanoparticles with oxygen vacancies decorated N-doped carbon nanorods: A highly efficient catalyst for nitrate electroreduction to ammonia

被引：62
|
作者：
Li, Zerong [1 ]
Deng, Zhiqin [2 ]
Ouyang, Ling [2 ]
Fan, Xiaoya [2 ]
Zhang, Longcheng [2 ]
Sun, Shengjun [2 ]
Liu, Qian [3 ]
Alshehri, Abdulmohsen Ali [4 ]
Luo, Yonglan [1 ]
Kong, Qingquan [3 ]
Sun, Xuping [2 ,5 ]
机构：
[1] China West Normal Univ, Sch Chem & Chem Engn, Chem Synth & Pollut Control Key Lab Sichuan Prov, Nanchong 637002, Peoples R China
[2] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Peoples R China
[3] Chengdu Univ, Inst Adv Study, Chengdu 610106, Peoples R China
[4] King Abdulaziz Univ, Fac Sci, Chem Dept, POB 80203, Jeddah 21589, Saudi Arabia
[5] Shandong Normal Univ, Coll Chem Chem Engn & Mat Sci, Jinan 250014, Peoples R China
来源：
NANO RESEARCH | 2022年 / 15卷 / 10期
基金：
中国国家自然科学基金;
关键词：
CeO2-x nanoparticles; oxygen vacancies; electrochemical NO3- reduction; ammonia synthesis; electrocatalysis; REDUCTION; TRANSITION; CHEMISTRY; NH3;
D O I：
10.1007/s12274-022-4863-8
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Electrocatalytic nitrate reduction reaction (NO3-RR) emerges as a highly efficient approach toward ammonia synthesis and degrading NO3- contaminant. In our study, CeO2 nanoparticles with oxygen vacancies (V-O) decorated N-doped carbon nanorods on graphite paper (CeO2-x@NC/GP) were demonstrated as a highly efficient NO3-RR electrocatalyst. The CeO2-x@NC/GP catalyst manifests a significant NH3 yield up to 712.75 mu mol.h(-1)cm(-2) at -0.8 V vs. reversible hydrogen electrode (RHE) and remarkable Faradaic efficiency of 92.93% at -0.5 V vs. RHE under alkaline conditions, with excellent durability. Additionally, an assembled Zn-NO3- battery with CeO2-x@NC/GP as cathode accomplishes a high-power density of 3.44 mWcm(-2) and a large NH3 yield of 145.08 mu mol.h(-1)cm(-2). Density functional theory results further expose the NO3- reduction mechanism on CeO2 (111) surface with V-O.
引用
收藏
页码：8914 / 8921
页数：8
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