Strain engineered gas-consumption electroreduction reactions: Fundamentals and perspectives

2020 
Abstract Gas-consuming electroreduction reactions (GERs), including carbon dioxide reduction reaction, two-electrons oxygen reduction reaction, and nitrogen reduction reaction, are viewed as promising clean and renewable approaches for the sustainable chemicals synthesized from a gas reduction in aqueous mediate, solving the energy and environmental crisis from over-dependent of the fossil fuels. However, due to sluggish kinetics and adsorption linear scaling relations, GERs showcase unfavorable activity, selectivity, and stability, impeding their scale-up application. Over the past few years, tremendous efforts have been made to boost electrocatalyst performance via imposing strain engineering on the linear scaling relations breakup and introducing strain engineered interface to accelerate kinetics. In this review, we summarize the fundamentals and applications of strain engineering-based strategies for boosting electrocatalytic performance in typical GERs. In detailed, the fundamentals of GERs, strain engineering, and linear scaling relations are firstly provided. Furthermore, the impacts of strain engineering on the breaks of linear scaling relations and the corresponding process control mechanism are presented. Moreover, the strain strategies and its application for the individual GERs are highlighted. Additionally, apart from polishing the performance of intrinsic active sites, the progress of gas mass diffusion and charge transfer enhanced by constructing superhydrophobiciltiy/superaerophilicity solid/liquid/gas interfaces, is also needed to be presented. Finally, we discuss guidelines for future opportunities and challenges of strain engineering for boosting electrocatalytic performance. Collectively, we hope that this review will offer a fine control strategy for electrocatalytic performance and clearly illustrate the in-depth mechanism for the catalytic process under the role of strain engineering. Furthermore, many anticipations of such inspirations could extend to synchronized control of multistep elementary competitive reaction in the sustainable production of emerging clean energy and environmental remediation communities.
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