Issue 1, 2016

A scandium-doped manganate anode for a proton-conducting solid oxide steam electrolyzer

Abstract

Perovskite La0.8Sr0.2MnO3−δ is widely used as an anode for proton-conducting solid oxide steam electrolyzers; however, the insufficient electro-catalytic activity still restricts the electrochemical steam oxidation activity. In this work, catalytically-active scandium is doped into the B-site of the manganate La0.8Sr0.2Mn1−xScxO3−δ (x = 0–0.1) to enhance the electrocatalytic performance. Combined characterizations of XRD, TEM, XPS, SEM and EDS confirm the successful partial replacement of Mn by Sc in the B-site. The doping of Sc remarkably improves ionic conductivity while accordingly decreases electronic conductivity. The electrocatalytic activity has been greatly improved and the composition of La0.8Sr0.2Mn1−xScxO3−δ with x = 0.05 has demonstrated the best electrode polarization performance. The faradic efficiency is significantly enhanced to as high as 80% for La0.8Sr0.2Mn1−xScxO3−δ (x = 0.05) in a proton conducting solid oxide electrolyzer in contrast to a cell with traditional LSM anode for high temperature steam electrolysis.

Graphical abstract: A scandium-doped manganate anode for a proton-conducting solid oxide steam electrolyzer

Supplementary files

Article information

Article type
Paper
Submitted
25 Sep 2015
Accepted
24 Nov 2015
First published
01 Dec 2015

RSC Adv., 2016,6, 641-647

A scandium-doped manganate anode for a proton-conducting solid oxide steam electrolyzer

L. Gan, L. Ye, M. Liu, S. Tao and K. Xie, RSC Adv., 2016, 6, 641 DOI: 10.1039/C5RA19844E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements