Fundamentals, rational catalyst design, and remaining challenges in electrochemical NO reduction reaction
Angga Hermawan, Vani Novita Alviani, Wibisono, Zhi Wei Seh
Abstract
Nitrogen oxides (NO x ) emissions carry pernicious consequences on air quality and human health, prompting an upsurge of interest in eliminating them from the atmosphere. The electrochemical NO x reduction reaction (NO x RR) is among the promising techniques for NO x removal and potential conversion into valuable chemical feedstock with high conversion efficiency while benefiting energy conservation. However, developing efficient and stable electrocatalysts for NO x RR remains an arduous challenge. This review provides a comprehensive survey of recent advancements in NO x RR, encompassing the underlying fundamentals of the reaction mechanism and rationale behind the design of electrocatalysts using computational modeling and experimental efforts. The potential utilization of NO x RR in a Zn-NO x battery is also explored as a proof of concept for concurrent NO x abatement, NH 3 synthesis, and decarbonizing energy generation. Despite significant strides in this domain, several hurdles still need to be resolved in developing efficient and long-lasting electrocatalysts for NO x reduction. These possible means are necessary to augment the catalytic activity and electrocatalyst selectivity and surmount the challenges of catalyst deactivation and corrosion. Furthermore, sustained research and development of NO x RR could offer a promising solution to the urgent issue of NO x pollution, culminating in a cleaner and healthier environment.