Physical mixing of piezo-electrocatalysts and graphene oxide to promote CO2 conversion

被引:20
作者
Ma, Jiangping [1 ,2 ]
Wu, Di [1 ,2 ]
Feng, Yajie [1 ,2 ]
Ban, Chaogang [1 ,2 ]
Xia, Lu [1 ,2 ]
Ruan, Lujie [1 ,2 ]
Guan, Jingfei [1 ,2 ]
Wang, Yang [1 ,2 ]
Meng, Jiazhi [1 ,2 ]
Dai, Ji-Yan [5 ]
Gan, Li-Yong [1 ,2 ]
Zhou, Xiaoyuan [1 ,2 ,3 ,4 ]
机构
[1] Chongqing Univ, Coll Phys, Chongqing 401331, Peoples R China
[2] Chongqing Univ, Ctr Quantum Mat & Devices, Chongqing 401331, Peoples R China
[3] Chongqing Inst New Energy Storage Mat & Equipment, Chongqing 401120, Peoples R China
[4] Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China
[5] Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong 999077, Peoples R China
基金
中国国家自然科学基金;
关键词
Physical mixing; Piezo-electrocatalysis; CO2; reduction; Graphene oxide; TOTAL-ENERGY CALCULATIONS; HYDROGEN-PRODUCTION; WATER; EFFICIENCY; EVOLUTION; HYBRID; PIEZOCATALYSIS; NANOCOMPOSITES; NANOPARTICLES; ENHANCEMENT;
D O I
10.1016/j.nanoen.2023.108719
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
Piezo-electrocatalytic CO2 reduction reaction (PECRR) technique has been verified as an effective CO2-to-fuel conversion strategy by exploiting and utilizing the widely distributed mechanical energy in nature, e.g., blue energy. The facile large-scale preparation of high-performance and low-cost piezo-electrocatalysts is therefore highly desired but challenging. Herein, a method of physical mixing of piezo-electrocatalysts and earth-abundant carbon-based materials is proposed to address the above issue, and we verified this method with typical piezoelectric BaTiO3 and graphene oxide (GO) as a demonstration. With an optimized GO concentration, the BaTiO3 shows a CO yield of 134.4 & mu;mol g-1 h-1 which is about 45.3 % higher than that of pristine BaTiO3. The mechanisms for the enhancement are revealed via boosted piezo-carrier dynamics and charge transfer from BaTiO3 to GO as well as enhanced intrinsic activity. Furthermore, physical mixing of GO is extended to other piezo-electrocatalysts (MoS2, ZnO, ZnS, CdS, Bi2WO6), from which it is found that their performance is improved compared to the counterpart of those without GO. This work suggests that the physical mixing GO is a universal method to improve PECRR performance and may be a decent candidate approach for large-scale preparation of high-performance and low-cost piezo-electrocatalysts in future.
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页数:12
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