English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The oxygen evolution reaction (OER) and chlorine evolution reaction (CER) are electrochemical processes with high relevance to water splitting for (solar) energy conversion and industrial production of commodity chemicals, respectively. Carrying out the two reactions separately is challenging, since the catalytic intermediates are linked by scaling relations. Optimizing the efficiency of OER over CER in acidic media has proven especially difficult. In this regard, we have investigated the OER versus CER selectivity of manganese oxide (MnO x ), a known OER catalyst. Thin films (∼5-20 nm) of MnO x were electrodeposited on glassy carbon-supported hydrous iridium oxide (IrO x /GC) in aqueous chloride solutions of pH ∼0.9. Using rotating ring-disk electrode voltammetry and online electrochemical mass spectrometry, it was found that deposition of MnO x onto IrO x decreases the CER selectivity of the system in the presence of 30 mM Cl - from 86% to less than 7%, making it a highly OER-selective catalyst. Detailed studies of the CER mechanism and ex-situ structure studies using SEM, TEM, and XPS suggest that the MnO x film is in fact not a catalytically active phase, but functions as a permeable overlayer that disfavors the transport of chloride ions.

MnOx/IrOx as Selective Oxygen Evolution Electrocatalyst in Acidic Chloride Solution

MnO_x/IrO_x as Selective Oxygen Evolution Electrocatalyst in Acidic Chloride Solution