Electrodeposition of compact Ag-Ni films from concentrated chloride baths and their test in the reduction of nitrate in alkali

被引：19

作者：

Mattarozzi, Luca ^{[1
]}

Cattarin, Sandro ^{[1
]}

Comisso, Nicola ^{[1
]}

El Habra, Naida ^{[1
]}

Guerriero, Paolo ^{[1
]}

Musiani, Marco ^{[1
]}

Vazquez-Gomez, Lourdes ^{[1
]}

机构：

[1] ICMATE CNR, Ist Chim Mat Condensata & Tecnol Energia, Cso Stati Uniti 4, I-35127 Padua, Italy

来源：

ELECTROCHIMICA ACTA | 2020年 / 346卷

关键词：

Electrodeposition; Metastable alloys; Ag-Ni alloys; Nitrate reduction; SODIUM-HYDROXIDE SOLUTIONS; ELECTROCHEMICAL REDUCTION; CU-NI; ALLOY ELECTRODES; EVOLUTION; NITRITE; NICKEL; SILVER; IONS; ELECTROREDUCTION;

D O I：

10.1016/j.electacta.2020.136240

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Compact Ag and Ag-Ni alloy layers have been electrodeposited from a concentrated chloride bath. The composition of the alloy can be controlled by regulation of the deposition current density jdep under conditions of accurate transport control like those ensured by the rotating disk electrode. XRD analyses suggest formation of Ag-rich crystalline phases in all samples and of Ni-rich crystalline phases only in samples with Ni fraction similar to 50 at%. Test experiments of nitrate reduction in alkali show: almost exclusive reduction to nitrite on Ag; prevalent reduction to ammonia on Ni, with an important side evolution of hydrogen; predominant and more efficient reduction to ammonia on AgeNi, with lower hydrogen evolution and better current stability. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：8

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