Boron-Doping Engineering in AgCd Bimetallic Catalyst Enabling Efficient CO2 Electroreduction to CO and Aqueous Zn-CO2 Batteries

被引:2
|
作者
Kang, Lan [1 ]
Zhang, Yonghao [1 ]
Dong, Lihui [1 ,2 ]
Yin, Shibin [1 ]
Li, Bin [1 ,2 ]
Fan, Minguang [1 ]
He, Huibing [1 ]
Chen, Zhengjun [1 ]
机构
[1] Guangxi Univ, Univ Key Lab Appl Chem Technol & Resource Dev, Guangxi Coll, Guangxi Key Lab Electrochem Energy Mat,Sch Chem &, Nanning 530004, Peoples R China
[2] Guangxi Univ, State Key Lab Featured Met Mat & Life cycle Safety, Nanning 530004, Peoples R China
基金
中国国家自然科学基金;
关键词
AgCd bimetal; B doping; CO2; electroreduction; CO selectivity; Zn-CO2; batteries; ELECTROCHEMICAL REDUCTION; CARBON; PD;
D O I
10.1002/smll.202406510
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The limited adsorption and activation of CO2 on catalyst and the high energy barrier for intermediate formation hinder the development of electrochemical CO2 reduction reactions (CO2RR). Herein, this work reports a boron (B) doping engineering in AgCd bimetals to alleviate the above limitations for efficient CO2 electroreduction to CO and aqueous Zn-CO2 batteries. Specifically, the B-doped AgCd bimetallic catalyst (AgCd-B) is prepared via a simple reduction reaction at room temperature. A combination of in situ experiments and density functional theory (DFT) calculations demonstrates that B-doping simultaneously enhances the adsorption and activation of CO2 and reduces the binding energy of the intermediates by moderating the electronic structure of bimetals. As a result, the AgCd-B catalyst exhibits a high CO Faraday efficiency (FECO) of 99% at -0.8 V versus reversible hydrogen electrode (RHE). Additionally, it maintains a FECO over 92% at a wide potential window of 600 mV (-0.6 to -1.1 V versus RHE). Furthermore, the AgCd-B catalyst coupled with the Zn anode to assemble aqueous Zn-CO2 batteries shows a power density of 20.18 mW cm(-2) and a recharge time of 33 h.
引用
收藏
页数:9
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