The increasing focus on cyber-physical security in Smart Grids (SGs) has catalyzed a surge in research over recent years. This paper comprehensively reviews SG cyber-physical security advancements, diverging from conventional studies that concentrate on specific attack types. It begins with a structured overview of SGs, delineating their cyber and physical layers and analyzing the key processes: generation, transmission, distribution, and consumption. Subsequent sections critique existing survey studies, identifying gaps and underscoring overlooked aspects in the current literature, particularly concerning the challenges faced. The review progresses to analyze current research trends in SG security, evaluating methodologies across both layers and categorizing them into Machine Learning-based, data-driven, and model-based approaches. The analysis includes a detailed classification of research focused on Control, Monitoring, and Protection across each component and stage of SGs. Additionally, the paper examines emerging cyberattack strategies in SGs that have not been extensively reviewed in existing literature. In conclusion, the paper reflects on significant gaps and challenges in SG cyber-physical security research, underscoring the need for further exploration and innovation in this domain. Thus, this review serves as a critical roadmap for future research, delineating the current state and potential directions in the rapidly evolving field of SG security.

NO formation, which is one of the main disadvantages of ammonia combustion, was studied during the isochoric, adiabatic autoignition of ammonia/air mixtures using the algorithm of Computational Singular Perturbation (CSP). The chemical reactions supporting the action of the mode relating the most to NO were shown to be essentially the ones of the extended Zeldovich mechanism, thus indicating that NO formation is mainly thermal and not due to fuel-bound nitrogen. Because of this, addition of water vapor reduced NO formation, because of its action as a thermal buffer, but increased ignition delay, thus exacerbating the second important caveat of ammonia combustion, which is unrealistically long ignition delay. However, it was also shown that further addition of just 2% molar of H${}_2$O${}_2$ does not only reduce the ignition delay by a factor of 30, but also reverses the way water vapor affects ignition delay. Specifically, in the ternary mixture NH${}_3$/H${}_2$O/H${}_2$O${}_2$, addition of water vapor does not prolong but rather shortens ignition delay because it increases OH radicals. At the same time, the presence of H${}_2$O${}_2$ does not affect the influence of H${}_2$O in suppressing NO generation. In this manner, we were able to show that NH${}_3$/H${}_2$O/H${}_2$O${}_2$ mixtures offer a way to use ammonia as carbon-less fuel with acceptable NO${}_x$ emissions and realistic ignition delay.