Direct electrolysis of waste newspaper for sustainable hydrogen production: an oxygen-functionalized porous carbon anode

Hibino, Takashi; Kobayashi, Kazuyo; Ito, Masaya; Nagao, Masahiro; Fukui, Mai; Teranishi, Shinya

doi:10.1016/j.apcatb.2018.03.021

Cited by 56 publications

(37 citation statements)

References 34 publications

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“…The partially oxygenated carbon anode used in this study was synthesized according to a procedure reported previously [15,16]. Briefly, 1.0 g of Ketjen Black (KB) was stirred in 24% HNO 3 diluted to 50 mL at room temperature for 74 h. After filtering and washing, the oxygenated KB was heated at 600 • C for 4 h under an Ar flow to eliminate carboxyl groups preferentially (as opposed to carbonyl groups having higher thermal stability) from the carbon surface.…”

Section: Resultsmentioning

confidence: 99%

“…Cellulose (15 mg) was impregnated with 85% H 3 PO 4 (ca. 270 mg), and the paste was stored on the surface of the anode in a similar manner to that reported previously [15,16]. The electrolyte membrane was sandwiched between the anode and cathode with effective areas of 2.0 and 0.5 cm 2 , respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Electrolysis at elevated temperatures is also advantageous for the kinetic characteristics of the used electrodes. A recent report indicated a lignocellulosic biomass electrolysis cell using partially oxygenated carbon as the anode at temperatures above 125 • C [15,16]. However, Pt was still necessary for the hydrogen evolution reaction (HER) at the cathode in this cell.…”

Section: Introductionmentioning

confidence: 99%

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A Cellulose Electrolysis Cell with Metal-Free Carbon Electrodes

Nagao

Kobayashi

et al. 2020

Catalysts

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Biomass raw materials, including agricultural residues, collected weeds, and wood chips, are important feedstocks for hydrogen production. Numerous attempts have been made to electrolyze biomass directly or indirectly to hydrogen because these processes allow for the production of hydrogen with less power consumption than water electrolysis. However, expensive metal-based electrocatalysts are needed, especially for the cathode reaction, in the electrolysis cells. Results from the present study demonstrate the production of hydrogen directly from cellulose, using an optimal mesoporous carbon as the cathode in addition to a partially oxygenated carbon anode at a temperature of 150 °C, with an electrolysis onset voltage of ca. 0.2 V, a current density of 0.29 A cm−2 at an electrolysis voltage of 1 V, and a current efficiency of approximately 100% for hydrogen production. These characteristics were comparable to those recorded when using a Pt/C anode and cathode under the same conditions. The sp2 planes of the carbon allowed π electrons to be donated to protons at the cathode. In addition, the mesoporous structure provided a sufficient amount of sp2 planes on the surface of the cathode.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Cellulose Electrolysis Cell with Metal-Free Carbon Electrodes

Nagao

Kobayashi

et al. 2020

Catalysts

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“…Various photocatalysts were reported to decompose water into H 2 and O 2 (Equation (1)). As we know, the hydrogen evolution reaction can be separated into two parts: oxidation for the evolution of O 2 (Equation (2)) and water reduction to produce H 2 (Equation (3)) [51][52][53][54][55][56]:…”

Section: Photocatalysts For Water Splittingmentioning

confidence: 99%

Photocatalytic Hydrogen Evolution via Water Splitting: A Short Review

et al. 2018

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Photocatalytic H2 generation via water splitting is increasingly gaining attention as a viable alternative for improving the performance of H2 production for solar energy conversion. Many methods were developed to enhance photocatalyst efficiency, primarily by modifying its morphology, crystallization, and electrical properties. Here, we summarize recent achievements in the synthesis and application of various photocatalysts. The rational design of novel photocatalysts was achieved using various strategies, and the applications of novel materials for H2 production are displayed herein. Meanwhile, the challenges and prospects for the future development of H2-producing photocatalysts are also summarized.

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“…Microbial electrolysis has also been reported, where electrochemical reaction promoted by microbial action can produce hydrogen through the electrolysis of exudates at lower cell voltages than that of water electrolysis 13 . The electrochemical characteristics of cellulose electrolysis have also been reported using cellulose as a model biomass 14 , newspaper 15 , woody sawdust 14 , and waste biomass 16 at around 150 °C. Cellulose in acidic solvent was supplied to the electrolysis cell and electrolyzed at a relatively higher temperature than room temperature, which is common for water electrolysis, and the onset voltage for electrolysis started from ca.…”

Section: Introductionmentioning

confidence: 99%

Intermediate-temperature electrolysis of energy grass Miscanthus sinensis for sustainable hydrogen production

Ito

Angelopoulos

Teranishi

et al. 2018

Sci Rep

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Biohydrogen produced from the electrolysis of biomass is promising because the onset voltages are less than 1.0 V and comparable to those of water and alcohol-water electrolysis. The present study focuses on Miscanthus sinensis as a model grass because of its abundance and ease of cultivation in Japan. The electrochemical performance and hydrogen formation properties of electrolysis cells using grass as a biohydrogen source were evaluated at intermediate temperature to achieve electrolysis. The components, such as holocellulose, cellulose, lignin, and extractives, were separated from Miscanthus sinensis to understand the reactions of Miscanthus sinensis in the electrolysis cell. The relatively high resistivity and low current-voltage performance of an electrolysis cell using lignin were responsible for degradation of the electrolysis properties compared to those with pure cellulose or holocellulose as biohydrogen resources. Biohydrogen was formed according to Faraday’s law and evolved continuously at 0.1 A cm−2 for 3,000 seconds.

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Direct electrolysis of waste newspaper for sustainable hydrogen production: an oxygen-functionalized porous carbon anode

Cited by 56 publications

References 34 publications

A Cellulose Electrolysis Cell with Metal-Free Carbon Electrodes

A Cellulose Electrolysis Cell with Metal-Free Carbon Electrodes

Photocatalytic Hydrogen Evolution via Water Splitting: A Short Review

Intermediate-temperature electrolysis of energy grass Miscanthus sinensis for sustainable hydrogen production

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