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An overall water-splitting polyoxometalate catalyst for the electromicrobial conversion of CO2 in neutral water
Wang, Meng1,2; Zhong, Wei1,2; Zhang, Shuangshuang1; Liu, Rongji1; Xing, Jianmin1; Zhang, Guangjin1
2018-06-07
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
Volume6Issue:21Pages:9915-9921
Abstract

Electromicrobial conversion of carbon dioxide is a promising alternative to the direct transfer of CO2 into biomass by using bacteria that consume hydrogen and CO2 for living. The efficiency of such a hybrid system strongly depends on the electrocatalyst used for hydrogen production. Here we evidence that a mixed noble metal free Co/Cu-containing polyoxometalate/Carbon Cloth (Cu6Co7/CC) hybrid possesses excellent activity as a water splitting pre-electrocatalyst at neutral pH, with Hydrogen Evolution Reaction (HER) and Oxygen Evolution Reaction (OER) overpotentials of 390 mV and 500 mV at 10 mA cm(-2) and Tafel slopes of 96 mV dec(-1) and 147 mV dec(-1), respectively. The nature of the catalysts involved for both the oxidation and reduction processes has been investigated. The long-term activity of the electrodes is also demonstrated. A negligible amount of H2O2 is produced during the electrolysis process. CO2 fixation with wild-type R. eutropha and the biocompatible Cu6Co7/CC precatalyst as both anode and cathode materials has been tested. The hydrogen produced on the cathode is consumed by the bacteria for living and growth with more than 50% of input electrical energy transferred into biomass. The solar-to-biomass efficiency (SCE) can reach 9.9 +/- 0.5% in a 6-day experiment, almost 10 times higher than those of natural plants, showing the high performance of this Cu6Co7/CC/R. eutropha system.

DOI10.1039/c8ta01902a
Language英语
WOS KeywordHydrogen Evolution Reaction ; Ralstonia-eutropha H16 ; Oxidation Catalysts ; Oxygen Evolution ; Reduction ; Performance ; Electrodes ; System ; Efficiency ; Complexes
Funding ProjectNational Natural Science Foundation of China[91545125] ; National Natural Science Foundation of China[U1662121] ; Youth Innovation Promotion Association of CAS
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China ; Youth Innovation Promotion Association of CAS
WOS IDWOS:000434241800017
PublisherROYAL SOC CHEMISTRY
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/24805
Collection中国科学院过程工程研究所
Corresponding AuthorZhang, Guangjin
Affiliation1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Meng,Zhong, Wei,Zhang, Shuangshuang,et al. An overall water-splitting polyoxometalate catalyst for the electromicrobial conversion of CO2 in neutral water[J]. JOURNAL OF MATERIALS CHEMISTRY A,2018,6(21):9915-9921.
APA Wang, Meng,Zhong, Wei,Zhang, Shuangshuang,Liu, Rongji,Xing, Jianmin,&Zhang, Guangjin.(2018).An overall water-splitting polyoxometalate catalyst for the electromicrobial conversion of CO2 in neutral water.JOURNAL OF MATERIALS CHEMISTRY A,6(21),9915-9921.
MLA Wang, Meng,et al."An overall water-splitting polyoxometalate catalyst for the electromicrobial conversion of CO2 in neutral water".JOURNAL OF MATERIALS CHEMISTRY A 6.21(2018):9915-9921.
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