Hybrid solar-to-methane conversion system with a Faradaic efficiency of up to 96%

Fu, Qian; Xiao, Shen; Li, Zhuo; Li, Yanbo; Kobayashi, Hajime; Li, Jun; Yang, Yang; Liu, Qiang; Zhu, Xun; He, Xuefeng; Ye, Dingding; Zhang, Liang; Zhong, Miao

doi:10.1016/j.nanoen.2018.08.051

Cited by 84 publications

(44 citation statements)

References 24 publications

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“…The combination of enzymes and photocatalysts for CO 2 conversion has attracted increasing attention because it makes full use of the abundant energy supply of solar light and high specificity of enzyme catalysis [ 108 , 109 , 110 ]. These reactions can be conducted at mild conditions similar to the photosynthesis that occurs in plants or certain bacteria.…”

Section: Catalytic Reduction Of Comentioning

confidence: 99%

Research Progress in Conversion of CO2 to Valuable Fuels

Xiu

Liu

et al. 2020

Molecules

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Rapid growth in the world’s economy depends on a significant increase in energy consumption. As is known, most of the present energy supply comes from coal, oil, and natural gas. The overreliance on fossil energy brings serious environmental problems in addition to the scarcity of energy. One of the most concerning environmental problems is the large contribution to global warming because of the massive discharge of CO2 in the burning of fossil fuels. Therefore, many efforts have been made to resolve such issues. Among them, the preparation of valuable fuels or chemicals from greenhouse gas (CO2) has attracted great attention because it has made a promising step toward simultaneously resolving the environment and energy problems. This article reviews the current progress in CO2 conversion via different strategies, including thermal catalysis, electrocatalysis, photocatalysis, and photoelectrocatalysis. Inspired by natural photosynthesis, light-capturing agents including macrocycles with conjugated structures similar to chlorophyll have attracted increasing attention. Using such macrocycles as photosensitizers, photocatalysis, photoelectrocatalysis, or coupling with enzymatic reactions were conducted to fulfill the conversion of CO2 with high efficiency and specificity. Recent progress in enzyme coupled to photocatalysis and enzyme coupled to photoelectrocatalysis were specially reviewed in this review. Additionally, the characteristics, advantages, and disadvantages of different conversion methods were also presented. We wish to provide certain constructive ideas for new investigators and deep insights into the research of CO2 conversion.

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Section: Catalytic Reduction Of Comentioning

confidence: 99%

Research Progress in Conversion of CO2 to Valuable Fuels

Xiu

Liu

et al. 2020

Molecules

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“…Moreover, the conduction bands of many semiconductive minerals are sufficiently negative for excitation of photoelectrons under solar irradiation, thus enabling an intimately coupled photoelectrochemical-microbial reduction (ICP-MR) of protons to hydrogen or reduction of carbon dioxide to methane (Fig. 5) [23,[126][127][128].…”

Section: Mineral Photoelectrons Participate In Microbial Extracellulamentioning

confidence: 99%

“…To assess the potential of mineral substituents used in ICP-MR systems, it is essential to evaluate their catalytic capabilities in more complex mixed substrates or under more demanding environmental conditions. Currently, an increasing number of investigations are underway to explore renewable energy production to alleviate the demand on carbon-based fuels in industrial manufacturing is still in great demand [23,147]. Thus, improving the efficiency of semiconductive mineral-mediated hybrid microbial-photoelectrochemical systems for energy conversion (e.g., generation of hydrogen and methane) will hold great promise for meeting future renewable energy goals.…”

Section: Significance Of Semiconductive Minerals In Assisting Icp-mrmentioning

confidence: 99%

“…Previous studies have primarily focused on the behaviors of microbes that harbor EETs coupled with redox-active and/or electrically conductive minerals for mineralization of organic pollutants and methanogenesis [20,21]. In recent years, major advances in microbial EET processes include fixation of carbon dioxide to organic compounds and denitrification via photosynthesis in conjunction with (semi) conductive minerals [22][23][24]. Therefore, understanding the fundamental mechanisms underlying microbe EETs coupling with minerals is expected to have profound significance in revealing the environmental impact and practical application of minerals.…”

Section: Introductionmentioning

confidence: 99%

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Recent advances in the roles of minerals for enhanced microbial extracellular electron transfer

Dong

Chen

Yan

et al. 2020

Renewable and Sustainable Energy Reviews

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Minerals are ubiquitous in the natural environment and have close contact with microorganisms. In various scenarios, microorganisms that harbor extracellular electron transfer (EET) capabilities have evolved a series of beneficial strategies through the mutual exchange of electrons with extracellular minerals to enhance survival and metabolism. These electron exchange interactions are highly relevant to the cycling of elements in the epigeosphere and have a profound significance in bioelectrochemical engineering applications. In this review, we summarize recent advances related to the effects of different minerals that facilitate the EET process and discuss the underlying mechanisms and outlooks for future applications. The promotional effects of minerals arise from their redox-active ability, electrical conductivity and photocatalytic capability. In mineral-promoted EET processes, various responses have concurrently arisen in microorganisms, such as stretching of electrically conductive pili (e-pili), upregulated expression of outer-membrane cytochromes (Cyts) and production of specific enzymes, and secretion of extracellular polymeric substances (EPSs). This review synthesizes the understanding of electron exchange mechanisms between microorganisms and minerals and highlights potential applications in development of renewable energy production and pollutant remediation, which are topics of particular significance to future exploitation of biotechnology.

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“…The surface morphology of CC and Ag NW//CC were characterized by employing VEGA 3 LMU scanning electron microscope. The CV measurements, Tafel polarization, and EIS tests were carried out by employing an electrochemical workstation (CHI 660E, CH Instruments, Inc. Shanghai, China) in a homemade three-electrode electrochemical cell consisting of an Ag NW//CC electrode (geometric area 1 cm × 1 cm) as the working electrode, a platinum wire as a counter electrode, and an Ag/AgCl (in saturated KCl solution) electrode as the reference electrode [34].…”

Section: Analysis Of Electrodementioning

confidence: 99%

Boosting the Power-Generation Performance of Micro-Sized Al-H2O2 Fuel Cells by Using Silver Nanowires as the Cathode

et al. 2018

Self Cite

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Micro-sized fuel cells represent one of the pollution-free devices available to power portable electronics. However, the insufficient power output limits the possibility of micro-sized fuel cells competing with other power sources, including supercapacitors and lithium batteries. In this study, a novel aluminum-hydrogen peroxide fuel cell is fabricated using uniform silver nanowires with diameters of 0.25 µm as the catalyst at the cathode side. The Ag nanowire solution is prepared via a polyol method, and mixed uniformly with Nafion and ethanol to enhance the adhesion of Ag nanowires. We carry out electrochemical tests, including cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel polarization, to characterize the performance of this catalyst in H 2 O 2 reduction. The Ag nanowires exhibit a high effectiveness and durability while catalyzing the reduction of H 2 O 2 with a low impedance. The micro-sized Al-H 2 O 2 fuel cell equipped with Ag nanowires delivers a power density of 43 W·m −2 under a low concentration of H 2 O 2 (0.1 M), which is substantially higher than the previously reported devices. Energies 2018, 11, 2316 2 of 10 However, the practical energy density of Al-H 2 O 2 FCs was still insufficient for powering practical micro-sized devices, due to their limited H 2 O 2 catalytic area, poor activity of H 2 O 2 catalyzation, self-decomposition reactions of hydrogen peroxide, as well as aluminum corrosion [9]. Among the above limitations, the cathode performance related to the H 2 O 2 catalyzation plays a vital role in determining the overall fuel cell performance [10-12]. Extensive studies have been carried out in exploring suitable cathode catalysts and architectures for catalyzing H 2 O 2 reduction reactions. Patrissi et al. employed a textile flocking technique to fabricate a microfiber carbon electrode coated by a layer of alloy of Pd and Ir as the cathode [13]. Yang et al. synthesized nano-island-shaped silver particles [2]. The cathode material was achieved by electrodepositing the metallic Ag catalyst on a Ni-foam substrate. Even though Al-H 2 O 2 fuel cells equipped with these cathodes exhibited high power densities, the techniques and materials demonstrated in these works were typically expensive and time-consuming.Here, silver nanowires (Ag NWs) were synthesized and utilized for the first time as the hydrogen peroxide reduction reaction catalyst. The morphology and structure of the Ag NWs coated on carbon paper (denoted as Ag NW//CC hereafter) were characterized using scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS). Electrochemical testing methods, including cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel polarization curve, were carried out to investigate its catalytic activity and stability. Finally, we designed and fabricated a microfluidic Al-H 2 O 2 FC, and characterized its power-generation performance. Results and Discussions Characterization of Electrode SurfaceThe morphologies of Ag NW//CC were firstly ...

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Hybrid solar-to-methane conversion system with a Faradaic efficiency of up to 96%

Cited by 84 publications

References 24 publications

Research Progress in Conversion of CO2 to Valuable Fuels

Research Progress in Conversion of CO2 to Valuable Fuels

Recent advances in the roles of minerals for enhanced microbial extracellular electron transfer

Boosting the Power-Generation Performance of Micro-Sized Al-H2O2 Fuel Cells by Using Silver Nanowires as the Cathode

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