Recent progress and perspective for oxygen evolution reaction under acidic environments

Abstract

Proton exchange membrane (PEM) electrolyzer play a vital role in sustainable energy conversion and storage. However, the oxygen evolution reaction (OER) has been considered as the major bottleneck, which limits...

Tuning Ni3+ Content in Ni3S2 to Boost Hydrogen Peroxide Production for Electrochemical Synthesis

“…Electrochemical catalysts with redox properties can be categorized into three groups, including noble metals and their alloys, transition metal compounds, and metal-free carbon-based catalysts. 25,26 Some studies show that metalbased catalysts exhibit excellent redox properties, but their high cost and scarcity have hindered their widespread application. Carbon materials are abundant, cheap, and highly conductive, but their activity and selectivity for the production of H 2 O 2 are pretty low, and there is little room for improvement.…”

“…To make this process occur efficiently, the catalysts used should play a bifunctional role to catalyze oxygen generation and reduction processes. Electrochemical catalysts with redox properties can be categorized into three groups, including noble metals and their alloys, transition metal compounds, and metal-free carbon-based catalysts. , Some studies show that metal-based catalysts exhibit excellent redox properties, but their high cost and scarcity have hindered their widespread application. Carbon materials are abundant, cheap, and highly conductive, but their activity and selectivity for the production of H 2 O 2 are pretty low, and there is little room for improvement. − Transition metals have attracted our attention, and some studies have proved that inexpensive transition metal elements (e.g., Fe, Co, Ni, Mn, Cu, and Cr) have good redox activity due to their abundant multivalent states. − …”