Electrochemical preparation of H2S and H2Se

被引：13

作者：

Bastide, S ^{[1
]}

Hügel, P

Lévy-Clément, C

Hodes, G

机构：

[1] CNRS, Lab Chim Metallurg Terres Rares, F-94320 Thiais, France

[2] Weizmann Inst Sci, IL-76100 Rehovot, Israel

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2005年 / 152卷 / 03期

关键词：

D O I：

10.1149/1.1852441

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

H2S and H2Se have been electrolytically prepared by electrolysis in aqueous H2SO4 solutions of composite cathodes made of S or Se and graphite. The efficiencies depended strongly on the electrolyte composition, in particular on the acid concentration and presence of K+. Faradaic efficiencies of 80% were obtained in dilute (0.05 M) acid, and this increased to 100% with added K2SO4. The efficiencies dropped drastically in concentrated acid (> a few moles). H2Te and AsH3 generation were also briefly studied for comparison. The mechanisms of hydride formation are discussed. Both the reaction of nascent hydrogen with the free element and direct reduction of the element are considered. The latter is believed to be the dominant mechanism. (c) 2005 The Electrochemical Society. All rights reserved.

引用

页码：D35 / D41

页数：7

共 28 条

[1]

BAEYER A, 1868, BER DTSCH CHEM GES, V1, P117

[2]

BERGE H, 1978, WISS Z W PIECK U MN, V27, P639

[3]

BERNFELD I, 1898, Z PHYS CHEM, V25, P46

[4] ELECTROLYTIC REDUCTION OF CHALCOPYRITE IN ACID SOLUTION [J].

BIEGLER, T ;

SWIFT, DA .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 1976, 6 (03) :229-235

[5] Interferences in electrochemical hydride generation of hydrogen selenide [J].

Bolea, E ;

Laborda, F ;

Belarra, MA ;

Castillo, YR .

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, 2001, 56 (12) :2347-2360

[6] NEW CONCEPT FOR HYDRIDE GENERATION TECHNIQUE - ELECTROCHEMICAL HYDRIDE GENERATION [J].

BROCKMANN, A ;

NONN, C ;

GOLLOCH, A .

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 1993, 8 (03) :397-401

[7] Hydrogen telluride and the atomic weight of tellurium [J].

Dennis, LM ;

Anderson, RP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1914, 36 :882-909

[8]

DMITRIEV AK, 1948, ZH OBSHCH KHIM, V18, P1266

[9] A SIMPLE SULFUR ELECTRODE FOR AQUEOUS SULFIDE MINERAL STUDIES [J].

EDWARDS, L ;

HOLLIDAY, RI ;

HONEY, D .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1991, 297 (02) :425-433

[10] Deposition of tellurium films by decomposition of electrochemically-generated H2Te:: application to radiative cooling devices [J].

Engelhard, T ;

Jones, ED ;

Viney, I ;

Mastai, Y ;

Hodes, G .

THIN SOLID FILMS, 2000, 370 (1-2) :101-105

← 1 2 3 →