A clean and membrane-free chlor-alkali process with decoupled Cl2 and H2/NaOH production

被引：88

作者：

Hou, Mengyan ^{[1
,2
]}

Chen, Long ^{[1
,2
]}

Guo, Zhaowei ^{[1
,2
]}

Dong, Xiaoli ^{[1
,2
]}

Wang, Yonggang ^{[1
,2
]}

Xia, Yongyao ^{[1
,2
]}

机构：

[1] Fudan Univ, iChEM Collaborat Innovat Ctr Chem Energy Mat, Inst New Energy, Dept Chem, Shanghai 200433, Peoples R China

[2] Fudan Univ, iChEM Collaborat Innovat Ctr Chem Energy Mat, Inst New Energy, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China

来源：

NATURE COMMUNICATIONS | 2018年 / 9卷

关键词：

SODIUM-ION BATTERIES; OXYGEN DEPOLARIZED CATHODES; POSITIVE ELECTRODE MATERIAL; CHLORINE-PRODUCTION; CELL; EVOLUTION; HYDROGEN; BRINE; PERFORMANCE; NA0.44MNO2;

D O I：

10.1038/s41467-018-02877-x

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Existing chlor-alkali processes generally use asbestos, mercury or fluorine-containing ion-exchange membranes to separate the simultaneous chlorine production on the anode and hydrogen production on the cathode, and form sodium hydroxide in the electrolyte. Here, using the Na+ de-intercalation/intercalation of a Na0.44MnO2 electrode as a redox mediator, we decouple the chlor-alkali process into two independent steps: a H-2 production step with the NaOH formation in the electrolyte and a Cl-2 production step. The first step involves a cathodic H-2 evolution reaction (H2O -> H-2) and an anodic Na+ de-intercalation reaction (Na0.44MnO2 -> Na0.44-xMnO2), during which NaOH is produced in the electrolyte solution. The second step depends on a cathodic Na+ intercalation reaction (Na0.44-xMnO2 -> Na0.44MnO2) and an anodic Cl-2 production (Cl -> Cl-2). The cycle of the two steps provides a membrane-free process, which is potentially a promising direction for developing clean chloralkali technology.

引用

页数：8

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