欢迎访问《电化学(中英文)》期刊官方网站,今天是

电化学(中英文) ›› 2023, Vol. 29 ›› Issue (2): 2215005.  doi: 10.13208/j.electrochem.2215005

所属专题: “电催化和燃料电池”专题文章

• 论文 • 上一篇    下一篇

基于阳极甘油氧化电催化的碱/酸混合电解制氢研究

冯辛a,b, 刘博文a, 郭可鑫a, 范林丰b, 王根香b, 次素琴a,*(), 温珍海b,*()   

  1. a南昌航空大学,江西省持久性污染物控制与资源循环利用重点实验室,江西 南昌 330063
    b中国科学院福建物质结构研究所,中科院功能纳米结构设计与组装重点实验室,福建省纳米材料重点实验室,福建 福州,350002
  • 收稿日期:2022-06-01 修回日期:2022-06-23 接受日期:2022-08-29 出版日期:2023-02-28 发布日期:2022-08-31

Anodic Electrocatalysis of Glycerol Oxidation for Hybrid Alkali/Acid Electrolytic Hydrogen Generation

Xin Fenga,b, Bo-Wen Liua, Ke-Xin Guoa, Lin-Feng Fanb, Gen-Xiang Wangb, Su-Qin Cia,*(), Zhen-Hai Wenb,*()   

  1. aKey Laboratory of Jiangxi Province for Persistent Pollutants Control, National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, Jiangxi, China
    bCAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
  • Received:2022-06-01 Revised:2022-06-23 Accepted:2022-08-29 Published:2023-02-28 Online:2022-08-31
  • Contact: *Su-Qin Ci, Tel: (86-791) 83953378, E-mail address: sqci@nchu.edu.cn.; *Zhen-Hai Wen, Tel: (86-591) 6317353, E-mail address: wen@fjirsm.ac.cn

摘要:

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Co3O4纳米片(NS)电极(Co3O4·NSs/NF)为阳极,商用碳载铂修饰碳布电极为阴极。在阳极端,Co3O4·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。

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

Abstract:

Electrolytic hydrogen production is heavily restricted by high-energy consumption majorly due to the relatively high potential of anodic oxygen evolution reaction (OER). Development of OER-alternative reaction at the anode has been recently proposed as a promising pathway to address the associated issues. In this work, we report a hybrid acid/alkali dual-electrolyte electrolyzer by coupling acidic hydrogen evolution reaction (HER) using commercial Pt/C cathode with alkaline electrocatalytic glycerol oxidation (GOR) which is implemented by developing a nickel foam (NF) supporting Co3O4 nanosheets anode that shows low overpotential and high selectivity toward GOR for formate production. The hybrid acid/alkali electrolyzer only requires an applied voltage of 0.55 V to achieve the electrolytic current density of 10 mA·cm-2 for glycerol conversion into formate at the anode and H2 production at the cathode with the Faraday efficiency of about 100%. The present work may open a new avenue to maximize the electron utilization efficiency and implement the energy-saving green route for H2 generation.

Key words: Self-supporting electrode, Glycerol oxidation, Electrocatalysis, Acid/alkali dual-electrolyte electrolyzer, Hydrogen generation