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基于阳极甘油氧化电催化的碱/酸混合电解制氢研究
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作者 冯辛 刘博文 +4 位作者 郭可鑫 范林丰 王根香 次素琴 温珍海 《电化学》 CAS 北大核心 2023年第2期29-38,共10页
耦合可再生电能的电解水制氢是一项极具前景的绿氢技术,该技术仍受限于阳极析氧反应(OER)动力学慢、过电位高等问题的限制。在阳极端采用热力学更容易的电氧化反应代替OER,可大幅降低电耗并且在阳极端获得增值产物,是电解制氢的一种新... 耦合可再生电能的电解水制氢是一项极具前景的绿氢技术,该技术仍受限于阳极析氧反应(OER)动力学慢、过电位高等问题的限制。在阳极端采用热力学更容易的电氧化反应代替OER,可大幅降低电耗并且在阳极端获得增值产物,是电解制氢的一种新策略。甘油作为生物柴油生产的主要副产品且产能过剩,其电催化氧化(GOR)理论电位比OER低。基于此,本研究工作报道了一种耦合酸性析氢反应(HER)与碱性GOR的混合酸/碱双电解液的制氢电解器,其以泡沫镍(NF)支撑Co_(3)O_(4)纳米片(NS)电极(Co_(3)O_(4)·NSs/NF)为阳极,商用碳载铂修饰碳布电极为阴极。在阳极端,Co_(3)O_(4)·NSs/NF对GOR电催化表现出较低的过电位和转化为甲酸盐的高选择性。在该混合酸/碱双电解液电解槽中,仅仅需要额外施加0.55 V的外加电压,即可达到10 mA·cm^(-2)的产氢电解电流密度,并可以在阳极将甘油高选择性地转化为甲酸盐,其中产氢的法拉第效率接近100%。本研究工作为电解制氢提供了一条节电、阳极增值转化的技术路线。 展开更多
关键词 自支撑电极 甘油电氧化 电催化 酸/碱双电解液电解 制氢
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Microbial Electrolysis Cells for Hydrogen Production 被引量:2
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作者 Li-juan Xiang Ling Dai +3 位作者 Ke-xin Guo Zhen-hai Wen su-qin ci Jing-hong Li 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2020年第3期263-284,I0002,共23页
Microbial electrolysis cells(MECs)present an attractive route for energy-saving hydrogen(H2)production along with treatment of various wastewaters,which can convert organic matter into H2 with the assistance of microb... Microbial electrolysis cells(MECs)present an attractive route for energy-saving hydrogen(H2)production along with treatment of various wastewaters,which can convert organic matter into H2 with the assistance of microbial electrocatalysis.However,the development of such renewable technologies for H2 production still faces considerable challenges regarding how to enhance the H2 production rate and to lower the energy and the system cost.In this review,we will focus on the recent research progress of MEC for H2 production.First,we present a brief introduction of MEC technology and the operating mechanism for H2 production.Then,the electrode materials including some typical electrocatalysts for hydrogen production are summarized and discussed.We also highlight how various substrates used in MEC affect the associated performance of hydrogen generation.Finally we presents several key scientific challenges and our perspectives on how to enhance the electrochemical performance. 展开更多
关键词 Microbial electrolysis cells H2 production ELECTROCATALYSIS Wastewater treatment Electrode materials
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