Effect of Thermal Treatment on Nickel-Cobalt Electrocatalysts for Glycerol Oxidation

被引：12

作者：

Andreu, Teresa ^{[1
,2
]}

Mallafre, Maria ^{[1
,2
]}

Molera, Marti ^{[1
,2
]}

Sarret, Maria ^{[1
,2
]}

Oriol, Roger ^{[3
]}

Sires, Ignasi ^{[3
]}

机构：

[1] Univ Barcelona, Fac Quim, Sustainable Electrochem Proc, Dept Mat Sci & Phys Chem, Marti i Franques 1-11, Barcelona 08028, Spain

[2] Univ Barcelona, Fac Quim, Inst Nanosci & Nanotechnol IN2UB, Marti i Franques 1-11, Barcelona 08028, Spain

[3] Univ Barcelona, Fac Quim, Dept Quim Fis, Lab Electroguim Mat & Medi Ambient, Marti i Franques 1-11, Barcelona 08028, Spain

来源：

CHEMELECTROCHEM | 2022年 / 9卷 / 09期

关键词：

Electrocatalysis; Glycerol oxidation; Hydrogen production; Nickel-Cobalt catalyst; Thermal treatment; ELECTROOXIDATION; CHEMICALS; HYDROXIDE; CO;

D O I：

10.1002/celc.202200100

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Nickel-cobalt electrocatalysts with atomic ratios of 2 : 1 and 1 : 2 were synthesized on nickel foam (NF) substrates by cathodic electrodeposition, further evaluating the performance of the pristine and thermally-treated materials as anodes for glycerol oxidation in alkaline medium. The electrodes were characterized by cyclic and linear sweep voltammetry at alkaline pH, showing an indirect oxidation of glycerol mediated by the metal oxyhydroxides. Under the selected conditions, a favourable potential window of 0.2 V upon comparison of water and glycerol oxidation was found. In addition, the increase in nickel content and the thermal treatment enhanced the anode polarization. After galvanostatic electrolysis at 10 mA cm(-2), the products were analysed by HPLC, formate ion being the primary product, with a faradaic efficiency (FE) higher than 70 % in most cases. Both the FE to formate and the glycerol conversion were substantially enhanced using the thermally-treated anodes, whereas the effect of the Ni/Co ratio on these two parameters did not follow a clear trend.

引用

页数：7

共 31 条

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